{"id":2902,"date":"2023-07-14T13:48:58","date_gmt":"2023-07-14T05:48:58","guid":{"rendered":"https:\/\/xinchewhd.com.cn\/?p=2902"},"modified":"2023-07-14T13:48:58","modified_gmt":"2023-07-14T05:48:58","slug":"%e5%88%9d%e5%a7%8bmybatis%ef%bc%8cw%e5%ad%97%e5%b8%a6%e4%bd%a0%e8%a7%a3mybatis","status":"publish","type":"post","link":"https:\/\/xinchewhd.com.cn\/index.php\/mybatis\/%e5%88%9d%e5%a7%8bmybatis%ef%bc%8cw%e5%ad%97%e5%b8%a6%e4%bd%a0%e8%a7%a3mybatis\/","title":{"rendered":"\u521d\u59cbMyBatis\uff0cw\u5b57\u5e26\u4f60\u89e3MyBatis"},"content":{"rendered":"\n \t\n
\n

\u76ee\u5f55<\/strong><\/p>\n

\n

\u4e00.\u4ec0\u4e48\u662fmybatis<\/a><\/p>\n

mybatis\u7684\u6982\u5ff5<\/a><\/p>\n

mybatis\u7684\u4f18\u52bf<\/a><\/p>\n

\u4e8c.mybatis\u76f8\u5bf9\u4e8eJDBC\uff0c\u6846\u67b6\u5e2e\u6211\u4eec\u505a\u4e86\u54ea\u4e9b\u4e8b\u60c5\uff1f<\/a><\/p>\n

\u4e09.\u5bf9\u5305\u542bmybatis\u7684\u7a0b\u5e8f\u8fdb\u884c\u5b9e\u64cd<\/a><\/p>\n

1.\u521b\u5efa\u9879\u76ee<\/a><\/p>\n

2.\u4fee\u6539\u914d\u7f6e\u6587\u4ef6<\/a><\/p>\n

3.\u51c6\u5907\u6570\u636e\u5e93\u76f8\u5173\u5185\u5bb9<\/a><\/p>\n

4.\u51c6\u5907\u5bf9\u5e94\u7684xml\u6587\u4ef6\u548c\u5bf9\u5e94\u7684mapper\u63a5\u53e3<\/a><\/p>\n

5.\u5b9a\u4e49\u5bf9\u5e94\u7684sql\u8bed\u53e5<\/a><\/p>\n

6.\u51c6\u5907\u5bf9\u5e94\u7684java\u7c7b<\/a><\/p>\n

\u56db.\u5360\u4f4d\u7b26<\/a><\/p>\n

\u4e94.\u591a\u8868\u67e5\u8be2<\/a><\/p>\n

\u4e00\u5bf9\u591a\u7684\u6620\u5c04<\/a><\/p>\n

\u6211\u4eec\u5f15\u5165\u5177\u4f53\u7684\u524d\u540e\u7aef\u4ea4\u4e92\u7684\u903b\u8f91\u5173\u7cfb\uff1a<\/a><\/p>\n

\u4e00\u5bf9\u4e00\u6620\u5c04\uff1a<\/a><\/p>\n

 \u4e00\u5bf9\u591a\u7684\u6620\u5c04<\/a><\/p>\n

\u516d.\u52a8\u6001sql<\/a><\/p>\n

\n

\n

\u4e00.\u4ec0\u4e48\u662fmybatis<\/h1>\n

mybatis\u7684\u6982\u5ff5<\/h2>\n

MyBatis \u662f\u4e00\u6b3e\u4f18\u79c0\u7684\u6301\u4e45\u5c42\u6846\u67b6\uff0c\u5b83\u652f\u6301\u5b9a\u5236\u5316 SQL\u3001\u5b58\u50a8\u8fc7\u7a0b\u4ee5\u53ca\u9ad8\u7ea7\u6620\u5c04\u30021\u3001Mybatis\u662f\u4e00\u4e2a\u534aORM\uff08\u5bf9\u8c61\u5173\u7cfb\u6620\u5c04\uff09\u6846\u67b6\uff0c\u5e95\u5c42\u5c01\u88c5\u4e86JDBC\uff0c\u662f\u7a0b\u5e8f\u5458\u5728\u5f00\u53d1\u65f6\u53ea\u9700\u8981\u5173\u6ce8SQL\u8bed\u53e5\u672c\u8eab\uff0c\u4e0d\u9700\u8981\u82b1\u8d39\u7cbe\u529b\u53bb\u5904\u7406\u52a0\u8f7d\u9a71\u52a8\u3001\u521b\u5efa\u8fde\u63a5\u3001\u521b\u5efastatement\u7b49\u7e41\u6742\u7684\u8fc7\u7a0b\u3002\u4f7f\u5f97\u7a0b\u5e8f\u5458\u53ef\u4ee5\u82b1\u66f4\u591a\u7684\u7cbe\u529b\u653e\u5230\u4e1a\u52a1\u5f00\u53d1\u4e2d\u3002\u53e6\u5916\uff0c\u7a0b\u5e8f\u5458\u76f4\u63a5\u7f16\u5199\u539f\u751f\u6001sql\uff0c\u4e25\u683c\u63a7\u5236sql\u6267\u884c\u6027\u80fd\uff0c\u7075\u6d3b\u5ea6\u9ad8\u30022\u3001MyBatis \u53ef\u4ee5\u4f7f\u7528\u7b80\u5355\u7684 XML\u6587\u4ef6 \u6216\u6ce8\u89e3\u65b9\u5f0f\u6765\u914d\u7f6e\u548c\u6620\u5c04\u539f\u751f\u4fe1\u606f\uff0c\u5c06 POJO\u6620\u5c04\u6210\u6570\u636e\u5e93\u4e2d\u7684\u8bb0\u5f55\uff0c\u907f\u514d\u4e86\u51e0\u4e4e\u6240\u6709\u7684 JDBC \u4ee3\u7801\u548c\u624b\u52a8\u8bbe\u7f6e\u53c2\u6570\u4ee5\u53ca\u83b7\u53d6\u7ed3\u679c\u96c6\u30023\u3001\u901a\u8fc7xml \u6587\u4ef6\u6216\u6ce8\u89e3\u7684\u65b9\u5f0f\u5c06\u8981\u6267\u884c\u7684\u5404\u79cd statement \u914d\u7f6e\u8d77\u6765\uff0c\u5e76\u901a\u8fc7java\u5bf9\u8c61\u548c statement\u4e2dsql\u7684\u52a8\u6001\u53c2\u6570\u8fdb\u884c\u6620\u5c04\u751f\u6210\u6700\u7ec8\u6267\u884c\u7684sql\u8bed\u53e5\uff0c\u6700\u540e\u7531mybatis\u6846\u67b6\u6267\u884csql\u5e76\u5c06\u7ed3\u679c\u6620\u5c04\u4e3ajava\u5bf9\u8c61\u5e76\u8fd4\u56de\u3002\uff08\u4ece\u6267\u884csql\u5230\u8fd4\u56deresult\u7684\u8fc7\u7a0b\uff09\u3002<\/strong><\/p><\/blockquote>\n

mybatis\u7684\u4f18\u52bf<\/h1>\n

1.mybatis\u57fa\u4e8esql\u8fdb\u884c\u7f16\u7a0b\uff0c\u901a\u8fc7\u5c06sql\u8bed\u53e5\u5199\u5165xml\u6587\u4ef6\u4e2d\uff0c\u4e0d\u4f1a\u5bf9\u6211\u4eec\u5f53\u524d\u5e94\u7528\u7a0b\u5e8f\u548c\u6570\u636e\u5e93\u7684\u8bbe\u8ba1\u4ea7\u751f\u4efb\u4f55\u5f71\u54cd\uff1b\u540c\u65f6\u5c06sql\u5199\u5728xml\u6587\u4ef6\u4e2d\uff0c\u89e3\u9664\u4e86sql\u548c\u7a0b\u5e8f\u4ee3\u7801\u7684\u8026\u5408\uff0c\u4fbf\u4e8e\u7a0b\u5e8f\u7684\u7edf\u4e00\u7ba1\u7406\uff0c\u540c\u65f6\u63d0\u4f9bxml\u6807\u7b7e\uff0c\u5141\u8bb8\u5b9e\u73b0\u52a8\u6001sql\uff0c\u4ece\u800c\u63d0\u9ad8\u4e86sql\u7684\u53ef\u91cd\u7528\u6027<\/strong><\/p>\n

2.\u4e0eJDBC\u76f8\u6bd4\uff0c\u4ee3\u7801\u91cf\u51cf\u5c11\u4e8650%\u4ee5\u4e0a\uff0c\u6d88\u9664\u4e86\u5927\u91cf\u7684\u5197\u4f59\u4ee3\u7801\uff0c\u4f7f\u6211\u4eec\u66f4\u591a\u7684\u7cbe\u529b\u653e\u5230\u4e86sql\u7684\u8bbe\u8ba1<\/strong><\/p>\n

3.\u63d0\u4f9b\u6620\u5c04\u6807\u7b7e\uff0c\u63d0\u4f9bjava\u5bf9\u8c61\u548c\u6570\u636e\u5e93\u5b57\u6bb5\u7684ORM\u5b57\u6bb5\u6620\u5c04\u3002<\/strong><\/p>\n

4.\u5f88\u597d\u7684\u4e0e\u5404\u79cd\u6570\u636e\u5e93\u517c\u5bb9\uff08\u56e0\u4e3aMyBatis\u4f7f\u7528JDBC\u6765\u8fde\u63a5\u6570\u636e\u5e93\uff0c\u6240\u4ee5\u53ea\u8981JDBC\u652f\u6301\u7684\u6570\u636e\u5e93MyBatis\u90fd\u652f\u6301\uff09<\/strong><\/p>\n

5.\u80fd\u591f\u4e0eSpring\u5f88\u597d\u7684\u96c6\u6210\uff1b<\/strong><\/p>\n

\u4e8c.mybatis\u76f8\u5bf9\u4e8eJDBC\uff0c\u6846\u67b6\u5e2e\u6211\u4eec\u505a\u4e86\u54ea\u4e9b\u4e8b\u60c5\uff1f<\/h1>\n

\u6211\u4eec\u901a\u8fc7\u5bf9\u6bd4JDBC\u8fdb\u884c\u6570\u636e\u5e93\u64cd\u4f5c\u7684\u4ee3\u7801\uff0c\u6211\u4eec\u5bf9JDBC\u548cMyBatis\u8fdb\u884c\u5bf9\u6bd4<\/p>\n

 public static Blog selectById(Long id){\n        \/\/\u68c0\u67e5id\u7684\u6709\u6548\u6027\n        if (LongUtil.isValid(id)){\n            return null;\n        }\n        Connection connection=null;\n        PreparedStatement statement=null;\n        ResultSet resultSet=null;\n\n\n        \/\/\u6570\u636e\u6709\u6548\uff0c\u8fdb\u884c\u6570\u636e\u67e5\u8be2\n        \/\/\u5efa\u7acb\u8fde\u63a5\n        try {\n            connection = DBUtil.getConnection();\n            \/\/\u5b9a\u4e49sql\u8bed\u53e5\n            String sql=\"select id,title,content,createTime,userId from blog where id=?\";\n            \/\/\u521b\u5efa\u6267\u884c\u5bf9\u8c61\u5e76\u586b\u5145\u53c2\u6570\n            statement = connection.prepareStatement(sql);\n            \/\/\u586b\u5145\u53c2\u6570\n            statement.setLong(1,id);\n            \/\/\u6267\u884c\u8bed\u53e5\n            resultSet = statement.executeQuery();\n            \/\/\u5904\u7406\u8fd0\u884c\u7ed3\u679c\n            if (resultSet.next()){\n                \/\/\u521b\u5efa\u65b0\u5bf9\u8c61\u8fd4\u56de\n                Blog blog = new Blog();\n                blog.setId(resultSet.getLong(\"id\"));\n                blog.setTitle(resultSet.getString(\"title\"));\n                blog.setContent(resultSet.getString(\"content\"));\n                blog.setCreateTime(resultSet.getTimestamp(\"createTime\"));\n                blog.setUserId(resultSet.getLong(\"userId\"));\n                return blog;\n\n            }else {\n                \/\/\u5982\u679c\u7ed3\u679c\u4e3a\u7a7a\n                return null;\n            }\n\n\n        } catch (SQLException e) {\n            throw new RuntimeException(e);\n        }finally {\n            \/\/\u65ad\u5f00\u8fde\u63a5\n            DBUtil.close(resultSet, statement, connection);\n        }\n    }<\/code><\/pre>\n
\u6211\u4eec\u53ef\u4ee5\u4ece\u4e2d\u603b\u7ed3\u4ee5\u4e0b\u4e03\u4e2a\u6b65\u9aa4\uff1a\u2460\u5efa\u7acb\u8fde\u63a5\u2461\u5b9a\u4e49sql\u8bed\u53e5\u2462\u9884\u6267\u884c\u2463\u8865\u5145\u53c2\u6570\u2464\u6267\u884csql\u8bed\u53e5\u2465\u8fd4\u56de\u5e76\u5904\u7406\u7ed3\u679c\u2466\u65ad\u5f00\u8fde\u63a5<\/strong><\/p>\n
\u800cmybatis\u76f8\u5bf9\u5176\u800c\u8a00\u5c31\u5316\u7b80\u4e86\u5f88\u591a\uff0c\u901a\u8fc7\u5728\u914d\u7f6e\u6587\u4ef6\u4e2d\u8bbe\u7f6e\u6570\u636e\u5e93\u8fde\u63a5\u7684\u76f8\u5173\u53c2\u6570\uff0c\u4e0d\u9700\u8981\u518d\u624b\u52a8\u8c03\u7528api\u8fdb\u884c\u6570\u636e\u5e93\u7684\u8fde\u63a5\uff0c\u4e5f\u4e0d\u9700\u8981\u624b\u52a8\u8c03\u7528api\u6267\u884csql\u8bed\u53e5\uff08\u5185\u5c42api\uff09\uff0c\u5904\u7406\u7ed3\u679c\u76f4\u63a5\u901a\u8fc7\u5bf9\u5e94\u7684mapper\u63a5\u53e3\u5bf9\u5e94\u7684\u65b9\u6cd5\u7684\u8fd4\u56de\u503c\u6620\u5c04\u5230java\u7c7b\u4e2d\uff0c\u66f4\u4e0d\u9700\u8981\u8fdb\u884c\u624b\u52a8\u65ad\u5f00\u4e0e\u6570\u636e\u5e93\u7684\u8fde\u63a5\uff0c\u603b\u7ed3\u4e0b\u6765\uff1a\u6211\u4eec\u53ea\u9700\u8981\u8fdb\u884cmapper\u63a5\u53e3\u548c\u5bf9\u5e94\u7684xml\u6587\u4ef6\u7684\u6620\u5c04\u64cd\u4f5c\u548c\u7f16\u5199sql\u8bed\u53e5\uff0c\u5927\u5927\u63d0\u9ad8\u4e86\u6211\u4eec\u8fdb\u884c\u4ee3\u7801\u5f00\u53d1\u7684\u6548\u7387\uff0c\u5728\u5f88\u5927\u7a0b\u5ea6\u4e0a\u4e5f\u51cf\u5c11\u4e86\u4ee3\u7801\u91cf\u3002<\/span><\/strong><\/p>\n
\u9664\u6b64\u4e4b\u5916\uff0c\u6211\u4eec\u5728mapper\u7684\u63a5\u53e3\u548c\u5bf9\u5e94\u7684xml\u6587\u4ef6\u53ea\u8fdb\u884c\u4e86\u547d\u540d\u7a7a\u95f4\u548c\u65b9\u6cd5\u7684\u6620\u5c04\u7684\u6807\u8bc6\uff0c\u800c\u5b9e\u9645\u7684\u6620\u5c04\u5de5\u4f5c\u662fmybatis\u6846\u67b6\u5e2e\u6211\u4eec\u505a\u7684\uff08mybatis\u6846\u67b6\u5bf9jdbc\u8fdb\u884c\u4e86\u5c01\u88c5\uff0c\u5e76\u901a\u8fc7\u5176\u4ed6\u914d\u7f6e\u81ea\u52a8\u5b8c\u6210\u67d0\u4e9b\u5de5\u4f5c\uff09<\/strong><\/span><\/p><\/blockquote>\n
\u4e09.\u5bf9\u5305\u542bmybatis\u7684\u7a0b\u5e8f\u8fdb\u884c\u5b9e\u64cd<\/h1>\n
1.\u521b\u5efa\u9879\u76ee<\/strong><\/h3>\n
 \u9009\u62e9\u4f9d\u8d56<\/strong>
\u914d\u7f6e\u7f16\u7801\u96c6<\/strong><\/p>\n
 
 \u7981\u7528JMX\u5e76\u914d\u7f6e\u70ed\u90e8\u7f72<\/strong>
2.\u4fee\u6539\u914d\u7f6e\u6587\u4ef6<\/h3>\n
\u5982\u679c\u6211\u4eec\u5728\u9879\u76ee\u542f\u52a8\u65f6\u6ca1\u6709\u914d\u7f6e\u5bf9\u5e94\u7684\u9a71\u52a8\u6e90\u3001url\u3001\u7528\u6237\u540d\u548c\u5bc6\u7801\uff0c\u4f1a\u62a5\u4ee5\u4e0b\u7684\u9519\u8bef\uff1a
\n
\u539f\u56e0\u5982\u4e0b\uff1aspringboot\u5f15\u5165\u4e86mybatis\u6846\u67b6\u4f9d\u8d56\u5305\uff0c\u5728\u9879\u76ee\u542f\u52a8\u65f6\u4f1a\u9ed8\u8ba4\u52a0\u8f7d\u4e00\u4e9b\u8d44\u6e90\uff0c\u5982\u679c\u5728\u914d\u7f6e\u6587\u4ef6\u4e2d\u627e\u4e0d\u5230\u8fd9\u90e8\u5206\u8d44\u6e90\uff0c\u5219\u5c31\u4f1a\u62a5\u9519 <\/p>\n
# \u8bbe\u7f6emysql\u6570\u636e\u6e90\u9a71\u52a8\nspring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver\n# \u8bbe\u7f6eurl\nspring.datasource.url=jdbc:mysql:\/\/localhost:3307\/java23characterEncoding=utf8&useSSL=false\n# \u8bbe\u7f6e\u7528\u6237\u540d\nspring.datasource.username=root\n# \u8bbe\u7f6e\u5bc6\u7801\nspring.datasource.password=abc123\n# \u5b9a\u4e49mapper\u6587\u4ef6\u7684\u914d\u7f6e\nmybatis.mapper-locations=classpath:mapper\/**Mapper.xml<\/code><\/pre>\n
3.\u51c6\u5907\u6570\u636e\u5e93\u76f8\u5173\u5185\u5bb9<\/h3>\n
\u5efa\u8868\u8bed\u53e5\u5982\u4e0b\uff1a<\/p>\n
-- \u521b\u5efa\u6570\u636e\u5e93\ndrop database if exists java23;\ncreate database java23 DEFAULT CHARACTER SET utf8;\n\n-- \u4f7f\u7528\u6570\u636e\u6570\u636e\nuse java23;\n\n-- \u521b\u5efa\u8868[\u7528\u6237\u8868]\ndrop table if exists  userinfo;\ncreate table userinfo(\n id int primary key auto_increment,\n username varchar(100) not null,\n password varchar(32) not null,\n photo varchar(500) default '',\n createtime datetime default now(),\n updatetime datetime,\n `state` int default 1\n);\n\n-- \u521b\u5efa\u6587\u7ae0\u8868\ndrop table if exists  articleinfo;\ncreate table articleinfo(\n                            id int primary key auto_increment,\n                            title varchar(100) not null,\n                            content text not null,\n                            createtime datetime default now(),\n                            updatetime datetime,\n                            uid int not null,\n                            rcount int not null default 1,\n                            `state` int default 1\n);\n\n-- \u521b\u5efa\u89c6\u9891\u8868\ndrop table if exists videoinfo;\ncreate table videoinfo(\n                          vid int primary key,\n                          `title` varchar(250),\n                          `url` varchar(1000),\n                          createtime datetime default now(),\n                          updatetime datetime,\n                          uid int\n);\n\n-- \u6dfb\u52a0\u4e00\u4e2a\u7528\u6237\u4fe1\u606f\nINSERT INTO `userinfo` (`id`, `username`, `password`, `photo`, `createtime`, `updatetime`, `state`) VALUES\n    (1, 'admin', 'admin', '', '2021-12-06 17:10:48', '2021-12-06 17:10:48', 1);\nINSERT INTO `userinfo` (`id`, `username`, `password`, `photo`, `createtime`, `updatetime`, `state`) VALUES\n    (2, 'abc', '123', '', '2021-12-06 17:10:48', '2021-12-06 17:10:48', 1);\n\n-- \u6587\u7ae0\u6dfb\u52a0\u6d4b\u8bd5\u6570\u636e\ninsert into articleinfo(title,content,uid,createtime) values('Java','Java\u6b63\u6587',1,'2023-05-05 19:09');\ninsert into articleinfo(title,content,uid,createtime) values('C++','C++\u6b63\u6587',1,'2023-05-04 19:09');\ninsert into articleinfo(title,content,uid,createtime) values('#C','#C\u6b63\u6587',1,'2023-05-03 19:09');\ninsert into articleinfo(title,content,uid,createtime) values('Python','Python\u6b63\u6587',2,'2023-05-03 19:09');<\/code><\/pre>\n
4.\u51c6\u5907\u5bf9\u5e94\u7684xml\u6587\u4ef6\u548c\u5bf9\u5e94\u7684mapper\u63a5\u53e3<\/h3>\n
\u8bbe\u7f6emapper\u63a5\u53e3<\/strong><\/p>\n
\u6e90\u7801\uff1a<\/p>\n
import com.ljl.mybatis_study.model.ArticleInfo;\nimport org.apache.ibatis.annotations.Mapper;\n\nimport java.util.List;\n\n\/**\n * @author tongchen\n * @create 2023-05-05 15:15\n *\/\n@Mapper\npublic interface ArticleMapper {\n    List<ArticleInfo> listAll();\n    List<ArticleInfo >listOne(Integer id);\n    Integer add(ArticleInfo info);\n    Integer del(Integer id);\n    List<ArticleInfo>order(String column ,String orders);\n    List<ArticleInfo>likeName(String name);\n\n}<\/code><\/pre>\n
 \u8bbe\u7f6e\u5bf9\u5e94\u7684xml\u6587\u4ef6<\/p>\n
\u6e90\u7801\u5982\u4e0b\uff1a<\/p>\n
<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<!DOCTYPE mapper PUBLIC \"-\/\/mybatis.org\/\/DTD Mapper 3.0\/\/EN\" \"http:\/\/mybatis.org\/dtd\/mybatis-3-mapper.dtd\">\n<mapper namespace=\"com.ljl.mybatis_study.mapper.ArticleMapper\">\n    <select id=\"listAll\" resultType=\"com.ljl.mybatis_study.model.ArticleInfo\">\n        select *from articleinfo\n    <\/select>\n\n\n<\/mapper><\/code><\/pre>\n
5.\u5b9a\u4e49\u5bf9\u5e94\u7684sql\u8bed\u53e5<\/h3>\n
\u5728\u5bf9\u5e94\u7684\u6807\u7b7e\u4e2d\u5199\u5165\u5bf9\u5e94\u7684sql\u8bed\u53e5<\/strong><\/p>\n
\u5728\u6b64\u5904\u5c31\u662f\u5728select\u6807\u7b7e\u5185\u5199\u5165\u5bf9\u5e94\u7684sql\u8bed\u53e5<\/strong><\/p>\n
select *from articleinfo<\/code><\/pre>\n
6.\u51c6\u5907\u5bf9\u5e94\u7684java\u7c7b<\/h3>\n
select\u8bed\u53e5\u8fd4\u56de\u7684\u662f\u5177\u4f53\u7684sql\u5bf9\u8c61\uff0c\u5728\u6211\u4eec\u7684\u7a0b\u5e8f\u4e2d\u7531\u6570\u636e\u5e93\u4ee5\u5b57\u7b26\u4e32\u7684\u5f62\u5f0f\u4f20\u8f93\u8fc7\u6765\u4e4b\u540e\uff0c\u9700\u8981\u6620\u5c04\u5230\u5177\u4f53\u7684java\u7c7b\uff0c\u800c\u8fd9\u4e2a\u7c7b\uff0c\u9700\u8981\u5bf9\u5e94\u6211\u4eec\u7a0b\u5e8f\u4e2d\u7684\u5177\u4f53\u5b9e\u4f53\u7c7b<\/p>\n
\u6211\u4eec\u7ed9\u51fa\u5b9e\u4f53\u7c7b\u7684\u6e90\u7801\uff1a<\/p>\n
import lombok.Getter;\nimport lombok.Setter;\nimport lombok.ToString;\n\nimport java.util.Date;\n\n\/**\n * @author tongchen\n * @create 2023-05-05 15:24\n *\/\n@Setter\n@Getter\n@ToString\npublic class ArticleInfo {\n    private Integer id;\n    private String title;\n    private String content;\n    private Date createtime;\n    private Date updatetime;\n    private Integer uid;\n    private Integer rcount;\n    private Integer state;\n    private Userinfo userinfo;\n}<\/code><\/pre>\n
\u56db.\u5360\u4f4d\u7b26<\/h1>\n
\u5728mybatis\u4e2d\u5b58\u5728\u4e24\u79cd\u7c7b\u578b\u7684\u5360\u4f4d\u7b26\uff1a#{\u5bf9\u5e94\u7684\u53d8\u91cf\u540d\u79f0}\u548c${\u5bf9\u5e94\u7684\u53d8\u91cf\u540d\u79f0}\uff1a\u4e24\u8005\u7684\u533a\u522b\u5982\u4e0b\uff1a#{}\u5bf9\u5e94\u7684\u5230\u5177\u4f53\u7684sql\u8bed\u53e5\u4e2d\u5b58\u5728\u5355\u5f15\u53f7\uff0c\u5373\u4e3a'\u53d8\u91cf\u540d'\uff0c\u5b83\u7684\u7279\u5f81\u4e5f\u4fa7\u9762\u53cd\u6620\u4e86\u5b83\u7684\u5e94\u7528\u573a\u666f\uff1a\u5b58\u653e\u67d0\u4e2a\u53d8\u91cf\u4e2d\u5177\u4f53\u7684\u503c\u3002\u5b83\u7684\u5b9e\u73b0\u539f\u7406\u5982\u4e0b\uff1a\u901a\u8fc7jdbc\u7684\u9884\u5904\u7406\uff0c\u53d8\u91cf\u540d\u5bf9\u5e94\u7684\u4f4d\u7f6e\u9996\u5148\u7528\uff1f\u8fdb\u884c\u5360\u4f4d\uff0c\u4e4b\u540e\u8c03\u7528preparedStatement.setxxx\u6765\u8fdb\u884c\u66ff\u6362<\/strong><\/span><\/p>\n
\u800c${}\u5bf9\u5e94\u7684\u53d8\u91cf\u5728sql\u8bed\u53e5\u4e2d\u6ca1\u6709\u5355\u5f15\u53f7\uff0c\u56e0\u6b64\u5b83\u7684\u5e94\u7528\u573a\u666f\u4e00\u822c\u5982\u4e0b\uff1a\u4f8b\u5982order by \u53d8\u91cf\u540d \u904d\u5386\u987a\u5e8f \uff0c\u5b83\u7684\u5b9e\u73b0\u539f\u7406\u662f\u5b57\u7b26\u4e32\u7684\u62fc\u63a5\uff1a<\/strong><\/span>\u4f46\u662f\u5b57\u7b26\u4e32\u62fc\u63a5\u5b58\u5728\u4e00\u4e2a\u76f8\u5bf9\u4e25\u91cd\u7684\u5b89\u5168\u9690\u60a3\uff1asql\u6ce8\u5165\uff0c\u800c\u9884\u5904\u7406\u6070\u597d\u53ef\u4ee5\u89e3\u51b3\u6b64\u95ee\u9898\uff0c\u9884\u5904\u7406\u89e3\u51b3\u95ee\u9898\u7684\u65b9\u5f0f\u5982\u4e0b\uff1a\u5bf9''\u8fdb\u884c\u8f6c\u4e49<\/strong><\/span><\/p>\n
\u6211\u4eec\u4ee5like\u8bed\u53e5\u8fdb\u884c\u4e3e\u4f8b\u8bf4\u660e\uff1a <\/p>\n
\u4e94.\u591a\u8868\u67e5\u8be2<\/span><\/h1>\n
\u6211\u4eec\u5728\u524d\u540e\u7aef\u4f20\u8f93\u8fc7\u7a0b\u6c47\u4e2d\u4ecesql\u4e2d\u7684\u5bf9\u8c61\u5230java\u7c7b\u4e2d\u5bf9\u8c61\u7684\u6620\u5c04\u8fc7\u7a0b\u4e2d\u5bf9\u5e94\u7740java\u7c7b\u4e2d\u5177\u4f53\u7684\u5bf9\u8c61\u7c7b\u578b\uff0c\u4f46\u662f\u5982\u679c\u6211\u4eec\u5728\u8fdb\u884c\u591a\u8868\u67e5\u8be2\u65f6\uff0c\u67e5\u8be2\u5230\u7684\u6570\u636e\u901a\u5e38\u662f\u9664\u4e86\u5177\u4f53\u7684java\u7c7b\u4e4b\u5916\u8fd8\u5305\u62ec\u5176\u4ed6\u7684\u989d\u5916\u5b57\u6bb5\uff0c\u8fd9\u65f6\u6211\u4eec\u53c8\u8be5\u5982\u4f55\u8fdb\u884c\u4ecesql\u5bf9\u8c61\u5230java\u5bf9\u8c61\u7684\u6620\u5c04\u5462?<\/span><\/strong><\/p>\n
answer:\u4f7f\u7528resultMap\uff08\u7ed3\u679c\u6620\u5c04\uff09<\/span>\uff1aresultMap\u662fMybatis\u6700\u5f3a\u5927\u7684\u5143\u7d20\uff0c\u5b83\u53ef\u4ee5\u5c06\u67e5\u8be2\u5230\u7684\u590d\u6742\u6570\u636e\uff08\u6bd4\u5982\u67e5\u8be2\u5230\u51e0\u4e2a\u8868\u4e2d\u6570\u636e\uff09\u6620\u5c04\u5230\u4e00\u4e2a\u7ed3\u679c\u96c6\u5f53\u4e2d\u3002\u4f7f\u7528resultType\u8fdb\u884c\u8f93\u51fa\u6620\u5c04\uff0c\u53ea\u6709\u67e5\u8be2\u51fa\u6765\u7684\u5217\u540d\u548cpojo\uff08\u5b9e\u4f53bean\uff09\u4e2d\u7684\u5c5e\u6027\u540d\u4e00\u81f4\uff0c\u8be5\u5217\u624d\u53ef\u4ee5\u6620\u5c04\u6210\u529f\u3002\u7b80\u5355\u6765\u8bf4\u4e5f\u5c31\u662f\u4f60\u7684\u6570\u636e\u5e93\u5b57\u6bb5\u548cJavaBean\u91cc\u7684\u5b57\u6bb5\u540d\u79f0\u5fc5\u987b\u4e00\u81f4\u624d\u80fd\u6620\u5c04\u6210\u529f\u3002\u6240\u4ee5\u5f53\u6211\u4eecJavaBean\u4e2d\u7684\u5b57\u6bb5\u540d\u548c\u6570\u636e\u5e93\u5b57\u6bb5\u540d\u79f0\u6709\u4e0d\u540c\u7684\u65f6\u5019\uff0c\u6216\u8005\u662f\u591a\u8868\u67e5\u8be2\u7684\u65f6\u5019\uff0c\u4e00\u822c\u4f1a\u4f7f\u7528resultMap<\/strong><\/p>\n
resultMap\u7684\u4f5c\u7528\u548c\u610f\u4e49\uff1a\u3000resultMap \u5143\u7d20\u662f MyBatis \u4e2d\u6700\u91cd\u8981\u6700\u5f3a\u5927\u7684\u5143\u7d20\u3002\u5b83\u5c31\u662f\u8ba9\u4f60\u8fdc\u79bb 90%\u7684\u9700\u8981\u4ece\u7ed3\u679c \u96c6\u4e2d\u53d6\u51fa\u6570\u636e\u7684 JDBC \u4ee3\u7801\u7684\u90a3\u4e2a\u4e1c\u897f, \u800c\u4e14\u5728\u4e00\u4e9b\u60c5\u5f62\u4e0b\u5141\u8bb8\u4f60\u505a\u4e00\u4e9b JDBC \u4e0d\u652f\u6301\u7684\u4e8b \u60c5\u3002 \u4e8b\u5b9e\u4e0a, \u7f16\u5199\u76f8\u4f3c\u4e8e\u5bf9\u590d\u6742\u8bed\u53e5\u8054\u5408\u6620\u5c04\u8fd9\u4e9b\u7b49\u540c\u7684\u4ee3\u7801, \u4e5f\u8bb8\u53ef\u4ee5\u8de8\u8fc7\u4e0a\u5343\u884c\u7684\u4ee3\u7801\u3002 ResultMap \u7684\u8bbe\u8ba1\u5c31\u662f\u7b80\u5355\u8bed\u53e5\u4e0d\u9700\u8981\u660e\u786e\u7684\u7ed3\u679c\u6620\u5c04,\u800c\u5f88\u591a\u590d\u6742\u8bed\u53e5\u786e\u5b9e\u9700\u8981\u63cf\u8ff0\u5b83\u4eec \u7684\u5173\u7cfb\u3002<\/span><\/strong><\/p>\n
resultMap\u4e00\u822c\u5b58\u5728\u7684\u5b57\u6bb5\u5982\u4e0b\uff1a<\/strong><\/p>\n\n\n\n\n\n
id<\/td>\n\u6620\u5c04\u7684\u4e3b\u952e\u4fe1\u606f<\/td>\n<\/tr>\n
property<\/td>\n\u6620\u5c04\u5230javaBean\u7684\u5b57\u6bb5\u540d\u79f0<\/td>\n<\/tr>\n
column<\/td>\nsql\u8bed\u53e5\u8fd4\u56de\u7684\u67e5\u8be2\u7ed3\u679c\u5bf9\u5e94\u7684\u5217\u540d<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
\u57fa\u672c\u7684\u7ed3\u679c\u6620\u5c04\u5982\u4e0b\uff1a<\/strong><\/p>\n
 \u6620\u5c04\u65f6\u9700\u8981\u6ce8\u610f\u7684\u662f\uff1aproperty \u548c column\u6240\u5bf9\u5e94\u7684\u6570\u636e\u53d8\u91cf\u540d\u5fc5\u987b\u76f8\u5bf9\u5e94\uff0c\u5373java\u7c7b\u4e2d\u7684\u5c5e\u6027\u540d\u548cproperty\u5bf9\u5e94\u7684\u53d8\u91cf\u540d\u5e94\u8be5\u5b8c\u5168\u4e00\u81f4\uff0ccolumn\u548c\u5bf9\u5e94\u7684\u53d8\u91cf\u540d\u548csql\u8bed\u53e5\u8fd4\u56de\u5bf9\u8c61\u5bf9\u5e94\u7684\u5b57\u6bb5\u540d\u79f0\u4e5f\u5e94\u8be5\u4fdd\u6301\u4e00\u81f4\u3002<\/strong><\/p>\n
\u6620\u5c04\u7684\u7c7b\u540d\u4e0d\u5339\u914d:<\/p>\n
\u4e00\u5bf9\u4e00\u7684\u6620\u5c04<\/strong><\/p>\n
\u8fd9\u91cc\u8fdb\u884c\u7684\u4e00\u5bf9\u4e00\u6620\u5c04\u548c\u4e00\u5bf9\u591a\u6620\u5c04\u624d\u771f\u6b63\u6d89\u53ca\u5230\u591a\u8868\u67e5\u8be2<\/strong><\/p>\n
\u8fd9\u91cc\u5f15\u51fa\u4e86association\u8054\u5408\uff1a<\/strong><\/p>\n
\u3000\u3000\u8054\u5408\u5143\u7d20\u7528\u6765\u5904\u7406\u201c\u4e00\u5bf9\u4e00\u201d\u7684\u5173\u7cfb\u3002\u9700\u8981\u6307\u5b9a\u6620\u5c04\u7684Java\u5b9e\u4f53\u7c7b\u7684\u5c5e\u6027\uff0c\u5c5e\u6027\u7684javaType\uff08\u901a\u5e38MyBatis \u81ea\u5df1\u4f1a\u8bc6\u522b\uff09\u3002<\/strong><\/p>\n
 type:resultMap\u4e2d\u5bf9\u5e94\u7684java\u4e2d\u7684\u7c7b<\/strong><\/p>\n
\u9664\u4e86\u4e0a\u6240\u793a\u4f8b\u7684\u5bf9\u5e94\u7684\u5c5e\u6027\u7684\u5bf9\u5e94\u5173\u7cfb\u4e4b\u5916\uff0c\u8fd8\u9700\u8981\u4e00\u4e2aassociation\u6765\u8fdb\u884c\u989d\u5916\u5173\u7cfb\u7684\u6620\u5c04\uff08\u9664\u4e86\u67d0\u4e2a\u5177\u4f53\u7684java\u7c7b\u5bf9\u5e94\u7684\u5b57\u6bb5\u4e4b\u5916\u7684\u989d\u5916\u5b57\u6bb5\uff09<\/strong><\/p>\n
    <resultMap id=\"BaseMap\" type=\"com.ljl.mybatis_study.model.ArticleInfo\">\n        <id column=\"id\" property=\"id\"\/>\n        <result column=\"title\" property=\"title\"\/>\n        <result column=\"content\" property=\"content\"\/>\n        <result column=\"createtime\" property=\"createtime\"\/>\n        <result column=\"updatetime\" property=\"updatetime\"\/>\n        <result column=\"uid\" property=\"uid\"\/>\n        <result column=\"rcount\" property=\"rcount\"\/>\n        <result column=\"state\" property=\"state\"\/>\n        <association property=\"userinfo\" resultMap=\"UserMap\" columnPrefix=\"u_\"\/>\n\n    <\/resultMap><\/code><\/pre>\n
\u9664\u6b64\u4e4b\u5916\uff0c\u8fd8\u9700\u8981\u5bf9\u8fd4\u56de\u503c\u7c7b\u578b\u5bf9\u5e94\u7684\u4e3b\u7c7b\u4e2d\u6dfb\u52a0\u5bf9\u5e94\u7684\u5b57\u6bb5\uff1a
\n
\u6e90\u7801\u5982\u4e0b\uff1a<\/p>\n
import lombok.Getter;\nimport lombok.Setter;\nimport lombok.ToString;\n\nimport java.util.Date;\n\n\/**\n * @author tongchen\n * @create 2023-05-05 15:24\n *\/\n@Setter\n@Getter\n@ToString\npublic class ArticleInfo {\n    private Integer id;\n    private String title;\n    private String content;\n    private Date createtime;\n    private Date updatetime;\n    private Integer uid;\n    private Integer rcount;\n    private Integer state;\n    private Userinfo userinfo;\n}<\/code><\/pre>\n
\u4e00\u5bf9\u591a\u7684\u6620\u5c04<\/h2>\n
\u7531\u4e8e\u662f\u4e00\u5bf9\u591a\uff0c\u6240\u4ee5\u8fd9\u91cc\u5c31\u5f15\u51fa\u4e86collection\u805a\u96c6\uff1a<\/p>\n
\u805a\u96c6\u5143\u7d20\u7528\u6765\u5904\u7406\u201c\u4e00\u5bf9\u591a\u201d\u7684\u5173\u7cfb\u3002\u9700\u8981\u6307\u5b9a\u6620\u5c04\u7684Java\u5b9e\u4f53\u7c7b\u7684\u5c5e\u6027\uff0c\u5c5e\u6027\u7684javaType\uff08\u4e00\u822c\u4e3aArrayList\uff09\uff1b\u5217\u8868\u4e2d\u5bf9\u8c61\u7684\u7c7b\u578bofType\uff08Java\u5b9e\u4f53\u7c7b\uff09\u3002<\/p>\n
\u540c\u6837\uff0ctype\u4ee3\u8868\u7684\u662f\u8fd9\u4e2aresultmap\u5bf9\u5e94\u7684java\u7c7b<\/strong><\/p>\n
<resultMap id=\"UserMap\" type=\"com.ljl.mybatis_study.model.Userinfo\">\n        <id column=\"id\" property=\"id\"\/>\n        <result column=\"username\" property=\"username\" \/>\n        <result column=\"password\" property=\"password\" \/>\n        <result column=\"photo\" property=\"photo\" \/>\n        <result column=\"createtime\" property=\"createtime\" \/>\n        <result column=\"updatetime\" property=\"updatetime\" \/>\n        <result column=\"state\" property=\"state\" \/>\n        <collection property=\"articleInfos\" resultMap=\"BaseMap\"\n                    columnPrefix=\"a_\"\/>\n    <\/resultMap><\/code><\/pre>\n
<\/h1>\n
\u6211\u4eec\u5f15\u5165\u5177\u4f53\u7684\u524d\u540e\u7aef\u4ea4\u4e92\u7684\u903b\u8f91\u5173\u7cfb\uff1a<\/strong><\/h2>\n
\u4e00\u5bf9\u4e00\u6620\u5c04\uff1a<\/strong>
\n <\/h3>\n
 \u4e00\u5bf9\u591a\u7684\u6620\u5c04<\/h3>\n
 
\u516d.\u52a8\u6001sql<\/h1>\n
<if><\/strong><\/span>\u6807\u7b7e<\/strong><\/span><\/h3>\n
\u8bed\u6cd5\u89c4\u5219\uff1a<if test=\"\u6761\u4ef6\u8bed\u53e5\"><\/strong><\/p>\n
if\u6807\u7b7e\u901a\u5e38\u7ed3\u5408trim\u6807\u7b7e\u7ed3\u5408\u4f7f\u7528\uff0c\u662f\u52a8\u6001sql\u7684\u8bed\u53e5\u7b26\u5408SQL\u7684\u8bed\u6cd5\u89c4\u5219<\/p><\/blockquote>\n
\u5b9e\u4f8b\uff1a<\/h3>\n
 <insert id=\"dynamicInsert\">\n        insert into userinfo <trim prefix=\"(\" suffix=\")\" suffixOverrides=\",\">\n        <if test=\"id!=null\">\n            id,\n        <\/if>\n        <if test=\"username!=null\">\n            username,\n        <\/if>\n        <if test=\"password!=null\">\n            password,\n        <\/if>\n        <if test=\"photo!=null\">\n            photo,\n        <\/if>\n    <\/trim>\n            values\n                <trim prefix=\"(\" suffix=\")\" suffixOverrides=\",\">\n        <if test=\"id!=null\">\n            #{id},\n        <\/if>\n        <if test=\"username!=null\">\n            #{username},\n        <\/if>\n        <if test=\"password!=null\">\n            #{password},\n        <\/if>\n        <if test=\"photo!=null\">\n            #{photo},\n        <\/if>\n                <\/trim>\n    <\/insert><\/code><\/pre>\n
<trim><\/strong><\/span>\u6807\u7b7e <\/strong><\/span><\/h3>\n
\u8bed\u6cd5\u89c4\u5219\uff1a
\n <\/p>\n
 prefix<\/strong><\/span> \uff1a\u8868\u793a\u6574\u4e2a\u8bed\u53e5\u5757\uff0c\u4ee5<\/strong><\/span> prefix<\/strong><\/span> \u7684\u503c\u4f5c\u4e3a\u524d\u7f00 <\/strong><\/span><\/div>\n
 suffix<\/strong><\/span> \uff1a\u8868\u793a\u6574\u4e2a\u8bed\u53e5\u5757\uff0c\u4ee5<\/strong><\/span> suffix<\/strong><\/span> \u7684\u503c\u4f5c\u4e3a\u540e\u7f00 <\/strong><\/span><\/div>\n
 prefixOverrides<\/strong><\/span> \uff1a\u8868\u793a\u6574\u4e2a\u8bed\u53e5\u5757\u8981\u53bb\u9664\u6389\u7684\u524d\u7f00 <\/strong><\/span><\/div>\n
 suffixOverrides<\/strong><\/span> \uff1a\u8868\u793a\u6574\u4e2a\u8bed\u53e5\u5757\u8981\u53bb\u9664\u6389\u7684\u540e\u7f00<\/strong><\/span><\/div>\n
 \u4f5c\u7528\uff1a\u52a0\u5165\u6216\u5220\u9664\u67d0\u4e9bsql\u8bed\u53e5\u7684\u5185\u5bb9\uff0c\u4f7fsql\u8bed\u53e5\u7b26\u5408\u8bed\u6cd5\u89c4\u5219\uff0c\u63d0\u9ad8\u6548\u7387<\/strong><\/span><\/div>\n<\/blockquote>\n
\n
 <insert id=\"dynamicInsert\">\n        insert into userinfo <trim prefix=\"(\" suffix=\")\" suffixOverrides=\",\">\n        <if test=\"id!=null\">\n            id,\n        <\/if>\n        <if test=\"username!=null\">\n            username,\n        <\/if>\n        <if test=\"password!=null\">\n            password,\n        <\/if>\n        <if test=\"photo!=null\">\n            photo,\n        <\/if>\n    <\/trim>\n            values\n                <trim prefix=\"(\" suffix=\")\" suffixOverrides=\",\">\n        <if test=\"id!=null\">\n            #{id},\n        <\/if>\n        <if test=\"username!=null\">\n            #{username},\n        <\/if>\n        <if test=\"password!=null\">\n            #{password},\n        <\/if>\n        <if test=\"photo!=null\">\n            #{photo},\n        <\/if>\n                <\/trim>\n    <\/insert><\/code><\/pre>\n
<where><\/strong><\/span>\u6807\u7b7e <\/strong><\/span><\/h3>\n
\u5bf9\u52a8\u6001sql\u8bed\u53e5\u8fdb\u884c\u6761\u4ef6\u9650\u5236\uff0c\u5e76\u53ef\u4ee5\u53bb\u9664where\u6761\u4ef6\u4e0b\u7b2c\u4e00\u4e2aand\u7b26\u53f7<\/strong><\/span><\/p>\n
\u5728\u4f5c\u7528\u4e0a\u76f8\u5f53\u4e8e\uff1a<\/strong><\/span> <trim prefix=\"where\" prefixOverrides=\"and\"><\/strong><\/span><\/p><\/blockquote>\n
\n
\u5177\u4f53\u4f7f\u7528\uff1a<\/strong><\/p>\n
 <select id=\"dynamicSelect\" resultMap=\"UserMap\">\n        select *from userinfo\n        <where>\n            <if test=\"id!=null\">\n              and  id=#{id}\n            <\/if>\n            <if test=\"username!=null\">\n              and  username=#{username}\n            <\/if>\n        <\/where>\n    <\/select><\/code><\/pre>\n
<set><\/strong><\/span>\u6807\u7b7e <\/strong><\/span><\/h3>\n
\u7528\u4e8esql\u8bed\u53e5\u4e2d\u7684update\u8bed\u53e5\uff0c\u5e76\u4e14\u53ef\u4ee5\u53bb\u9664\u6700\u540e\u4e00\u4e2a\u9017\u53f7<\/strong><\/p>\n
 set\u6807\u7b7e\u4e5f\u53ef\u4ee5\u4f7f\u7528 <\/strong><\/span> <trim prefix=\"set\" suffixOverrides=\",\"> <\/span> \u66ff\u6362\u3002<\/strong><\/span><\/div>\n<\/blockquote>\n
\n
\u5177\u4f53\u4f7f\u7528\u5982\u4e0b\uff1a<\/h3>\n
  <update id=\"dynamicUpdate\">\n        update userinfo\n        <set >\n            <if test=\"photo!=null\">\n                photo=#{photo},\n            <\/if>\n            <if test=\"username!=null\">\n                username=#{username},\n            <\/if>\n        <\/set>\n            where id=#{id}\n    <\/update><\/code><\/pre>\n
<foreach><\/strong><\/span>\u6807\u7b7e <\/strong><\/span><\/h3>\n
\u5bf9\u96c6\u5408\u8fdb\u884c\u904d\u5386\u65f6\u4f7f\u7528\u8be5\u6807\u7b7e<\/strong><\/span><\/p>\n
    \n
  • collection<\/strong><\/span>\uff1a\u7ed1\u5b9a\u65b9\u6cd5\u53c2\u6570\u4e2d\u7684\u96c6\u5408\uff0c\u5982<\/strong><\/span> List<\/strong><\/span>\uff0c<\/strong><\/span>Set<\/strong><\/span>\uff0c<\/strong><\/span>Map<\/strong><\/span>\u6216\u6570\u7ec4\u5bf9\u8c61 <\/strong><\/span><\/li>\n
  • item<\/strong><\/span>\uff1a\u904d\u5386\u65f6\u7684\u6bcf\u4e00\u4e2a\u5bf9\u8c61 <\/strong><\/span><\/li>\n
  • open<\/strong><\/span>\uff1a\u8bed\u53e5\u5757\u5f00\u5934\u7684\u5b57\u7b26\u4e32 <\/strong><\/span><\/li>\n
  • close<\/strong><\/span>\uff1a\u8bed\u53e5\u5757\u7ed3\u675f\u7684\u5b57\u7b26\u4e32 <\/strong><\/span><\/li>\n
  • separator<\/span>\uff1a\u6bcf\u6b21\u904d\u5386\u4e4b\u95f4\u95f4\u9694\u7684\u5b57\u7b26\u4e32<\/span><\/strong><\/li>\n<\/ul>\n<\/blockquote>\n<\/div>\n<\/div>\n<\/div>\n
    \u5bf9\u4e8e\u4f7f\u7528foreach\u8fdb\u884c\u904d\u5386\u7684\u5143\u7d20\uff0c\u4e00\u822c\u5c06\u5176\u5212\u5206\u4e3a\u4e24\u79cd\uff0c\u96c6\u5408\u4e2d\u5b58\u5728\u7684\u57fa\u672c\u6570\u636e\u7c7b\u578b\u6216\u8005\u662f\u5176\u5305\u88c5\u7c7b\uff0c\u53e6\u4e00\u79cd\u662f\u81ea\u5b9a\u4e49\u7684\u6570\u636e\u7c7b\u578b\uff0c\u5bf9\u4e8e\u96c6\u5408\u4e2d\u50a8\u5b58\u57fa\u672c\u6570\u636e\u7c7b\u578b\uff0c\u6211\u4eec\u4e00\u822c\u8981\u5728Controller\u5c42\u5bf9\u5e94\u7684\u65b9\u6cd5\u53c2\u6570\u4e2d\u6dfb\u52a0@RequestParam\u6ce8\u89e3\uff0c\u5982\u679c\u4e0d\u52a0\u4f20\u8f93\u7684\u6570\u636e\u5f53\u505a\u666e\u901a\u5143\u7d20\u8fdb\u884c\u5904\u7406\uff0c\u4f1a\u62a5\u9519\uff0c\u62a5\u9519\u4fe1\u606f\u5982\u4e0b\uff1aRequest processing failed; nested exception is java.lang.IllegalStateException: No primary or single unique constructor found for interface java.util.List
    \nat org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1014) ~[spring-webmvc-5.3.27.jar:5.3.27]
    \nat org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:909) ~[spring-webmvc-5.3.27.jar:5.3.27]<\/span><\/strong><\/p>\n
    \u5373\u6ca1\u6709\u552f\u4e00\u7684\u6784\u9020\u65b9\u6cd5<\/span><\/strong><\/p>\n
    \u800c\u5bf9\u4e8e\u6211\u4eec\u81ea\u5b9a\u4e49\u7684\u65b9\u6cd5\uff0c\u6211\u4eec\u4e00\u822c\u4f7f\u7528\u7684\u5219\u662f@RequestBody\u8fd9\u4e2a\u6ce8\u89e3\uff0c\u6b64\u65f6\u524d\u7aef\u4f20\u8f93\u7684\u6570\u636e\u901a\u5e38\u662fjson\u7c7b\u578b<\/strong><\/p>\n
    \u6211\u4eec\u5bf9\u4e00\u4e2a\u7b80\u5355\u7c7b\u578b\u548c\u590d\u6742\u7c7b\u578b\u5206\u522b\u8fdb\u884c\u904d\u5386\uff1a
    \n\u7b80\u5355\u7c7b\u578b\uff1a<\/p>\n
    \u590d\u6742\u7c7b\u578b\uff1a<\/p>\n
      <insert id=\"dynamicInsertMore\">\n    insert into userinfo (username ,password ,photo)\n    values\n    <foreach collection=\"list\" item=\"userinfo\"  separator=\",\">\n        (#{userinfo.username},#{userinfo.password},#{userinfo.photo})\n    <\/foreach><\/code><\/pre>\n<\/div>\n
    \u672c\u7bc7\u6587\u7ae0\u6765\u6e90\u4e8eCSDN\uff1ahttps:\/\/blog.csdn.net\/m0_65431718\/article\/details\/130506304<\/p>\n","raw":"","protected":false},"excerpt":{"rendered":"
    \u76ee\u5f55 \u4e00.\u4ec0\u4e48\u662fmybatis mybatis\u7684\u6982\u5ff5 mybatis\u7684\u4f18\u52bf \u4e8c.mybatis\u76f8\u5bf9\u4e8eJDBC\uff0c\u6846\u67b6\u5e2e\u6211\u4eec\u505a\u4e86\u54ea\u4e9b\u4e8b …<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"emotion":"","emotion_color":"","title_style":"","license":"","footnotes":""},"categories":[33],"tags":[],"class_list":["post-2902","post","type-post","status-publish","format-standard","hentry","category-mybatis"],"post_thumbnail_image":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-14\/13-47-57\/2023071413475738387d394.png","content_first_image":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-14\/13-47-57\/2023071413475738387d394.png","post_medium_image_300":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-14\/13-47-57\/2023071413475738387d394.png","post_thumbnail_image_624":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-14\/13-47-57\/2023071413475738387d394.png","post_frist_image":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-14\/13-47-57\/2023071413475738387d394.png","post_medium_image":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-14\/13-47-57\/2023071413475738387d394.png","post_large_image":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-14\/13-47-57\/2023071413475738387d394.png","post_full_image":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-14\/13-47-57\/2023071413475738387d394.png","post_all_images":[{"imagesurl":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-14\/13-47-57\/2023071413475738387d394.png","id":"image0"},{"imagesurl":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-14\/13-47-57\/2023071413475738387d394.png","id":"image1"},{"imagesurl":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-14\/13-47-58\/202307141347582525211b5.png","id":"image2"},{"imagesurl":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-14\/13-47-58\/202307141347582525211b5.png","id":"image3"},{"imagesurl":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-14\/13-47-58\/2023071413475886863ea21.png","id":"image4"},{"imagesurl":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-14\/13-47-58\/2023071413475886863ea21.png","id":"image5"},{"imagesurl":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-14\/13-47-59\/20230714134759f7f7cea6f.png","id":"image6"},{"imagesurl":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-14\/13-47-59\/20230714134759f7f7cea6f.png","id":"image7"},{"imagesurl":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-14\/13-47-59\/20230714134759d2d293c5c.png","id":"image8"},{"imagesurl":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-14\/13-47-59\/20230714134759d2d293c5c.png","id":"image9"},{"imagesurl":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-14\/13-48-00\/20230714134800010115766.png","id":"image10"},{"imagesurl":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-14\/13-48-00\/20230714134800010115766.png","id":"image11"},{"imagesurl":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-14\/13-48-00\/202307141348006262ede26.png","id":"image12"},{"imagesurl":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-14\/13-48-00\/202307141348006262ede26.png","id":"image13"},{"imagesurl":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-14\/13-48-00\/20230714134800afaf09b4c.png","id":"image14"},{"imagesurl":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-14\/13-48-00\/20230714134800afaf09b4c.png","id":"image15"},{"imagesurl":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-14\/13-48-01\/202307141348017676c27dd.png","id":"image16"},{"imagesurl":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-14\/13-48-01\/202307141348017676c27dd.png","id":"image17"},{"imagesurl":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-14\/13-48-01\/202307141348015e5edeade.png","id":"image18"},{"imagesurl":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-14\/13-48-01\/202307141348015e5edeade.png","id":"image19"},{"imagesurl":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-14\/13-48-01\/20230714134801d0d03216c.png","id":"image20"},{"imagesurl":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-14\/13-48-01\/20230714134801d0d03216c.png","id":"image21"},{"imagesurl":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-14\/13-48-02\/20230714134802383839cf1.png","id":"image22"},{"imagesurl":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-14\/13-48-02\/20230714134802383839cf1.png","id":"image23"},{"imagesurl":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-14\/13-48-02\/20230714134802fafa9144f.png","id":"image24"},{"imagesurl":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-14\/13-48-02\/20230714134802fafa9144f.png","id":"image25"},{"imagesurl":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-14\/13-48-03\/202307141348039999ab9a1.png","id":"image26"},{"imagesurl":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-14\/13-48-03\/202307141348039999ab9a1.png","id":"image27"},{"imagesurl":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-14\/13-48-03\/20230714134803c2c26a766.png","id":"image28"},{"imagesurl":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-14\/13-48-03\/20230714134803c2c26a766.png","id":"image29"},{"imagesurl":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-14\/13-48-03\/202307141348034b4bfaae4.png","id":"image30"},{"imagesurl":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-14\/13-48-03\/202307141348034b4bfaae4.png","id":"image31"},{"imagesurl":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-14\/13-48-04\/2023071413480465655b2a6.png","id":"image32"},{"imagesurl":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-14\/13-48-04\/2023071413480465655b2a6.png","id":"image33"},{"imagesurl":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-14\/13-48-04\/202307141348045252572b7.png","id":"image34"},{"imagesurl":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-14\/13-48-04\/202307141348045252572b7.png","id":"image35"},{"imagesurl":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-14\/13-48-05\/20230714134805c7c76ce64.png","id":"image36"},{"imagesurl":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-14\/13-48-05\/20230714134805c7c76ce64.png","id":"image37"},{"imagesurl":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-14\/13-48-05\/20230714134805f2f2cbb45.png","id":"image38"},{"imagesurl":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-14\/13-48-05\/20230714134805f2f2cbb45.png","id":"image39"},{"imagesurl":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-14\/13-48-05\/2023071413480559598899e.png","id":"image40"},{"imagesurl":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/default\/nine\/2023-07-14\/13-48-05\/2023071413480559598899e.png","id":"image41"}],"videoAdId":"","listAd":"0","listAdId":"","listAdEvery":6,"total_comments":0,"category_name":"Mybatis","post_date":"2023-07-14","like_count":"0","praiseWord":"\u9f13\u52b1","copyright_state":"","excitationAd":"0","rewardedVideoAdId":"","detailAdId":"","detailAd":"0","enterpriseMinapp":"0","audios":[],"postImageUrl":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2023\/05\/20230519082947553.jpg","avatarurls":[],"related_posts":null,"pageviews":841,"next_post_id":2941,"next_post_title":"Mybatis\u7cfb\u5217\u7b2c12\u7bc7\uff1a\u638c\u63e1\u7f13\u5b58\u4e3a\u67e5\u8be2\u63d0\u901f!","previous_post_id":4395,"previous_post_title":"Spring 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