{"id":4708,"date":"2024-05-17T22:00:39","date_gmt":"2024-05-17T14:00:39","guid":{"rendered":"https:\/\/xinchewhd.com.cn\/index.php\/%e9%9d%a2%e8%af%95\/10-%e7%a7%8d%e8%b6%85%e8%b5%9e%e7%9a%84-mybatis-%e5%86%99%e6%b3%95%ef%bc%8c%e5%90%8c%e4%ba%8b%e9%83%bd%e8%af%b4%e5%a5%bd%e7%94%a8%ef%bc%81\/"},"modified":"2024-08-02T17:18:24","modified_gmt":"2024-08-02T09:18:24","slug":"10-%e7%a7%8d%e8%b6%85%e8%b5%9e%e7%9a%84-mybatis-%e5%86%99%e6%b3%95%ef%bc%8c%e5%90%8c%e4%ba%8b%e9%83%bd%e8%af%b4%e5%a5%bd%e7%94%a8%ef%bc%81","status":"publish","type":"post","link":"https:\/\/xinchewhd.com.cn\/index.php\/%e9%9d%a2%e8%af%95\/10-%e7%a7%8d%e8%b6%85%e8%b5%9e%e7%9a%84-mybatis-%e5%86%99%e6%b3%95%ef%bc%8c%e5%90%8c%e4%ba%8b%e9%83%bd%e8%af%b4%e5%a5%bd%e7%94%a8%ef%bc%81\/","title":{"rendered":"10 \u79cd\u8d85\u8d5e\u7684 MyBatis \u5199\u6cd5\uff0c\u540c\u4e8b\u90fd\u8bf4\u597d\u7528\uff01"},"content":{"rendered":"
\n
\n

\u4e0a\u65b9\u84dd\u8272\u201c<\/span>\u7a0b\u5e8f\u5458\u8ffd\u98ce<\/span>\u201d\uff0c\u9009\u62e9\u201c\u8bbe\u4e3a\u661f\u6807\u201d<\/span><\/span><\/p>\n

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\u539f\u6587\uff1ablog.csdn.net\/smile_lg\/article\/details\/71215619<\/span><\/p>\n

\n

<\/figure>\n

MyBatis \u867d\u8bf4\u7ed9\u6211\u4eec\u7684\u5f00\u53d1\u5e26\u6765\u4e86\u5f88\u591a\u7684\u4fbf\u6377\uff0c\u4f46\u6709\u4e9b\u5730\u65b9\u5199\u8d77\u6765\u4f9d\u65e7\u6bd4\u8f83\u7684\u9ebb\u70e6\uff0c\u6bd4\u5982\u914d\u7f6eXML\u7684\u65f6\u5019\uff0c\u4f46\u662f\u4e00\u4e2a\u597d\u7684\u5199\u6cd5\uff0c\u4e0d\u4ec5\u80fd\u4e3a\u6211\u4eec\u8282\u7701\u4e0d\u5c11\u65f6\u95f4\u3001\u8fd8\u80fd\u80fd\u964d\u4f4e\u51fa\u9519\u7684\u6982\u7387\uff0c\u4e0b\u9762\u5c31\u7ed9\u5927\u5bb6\u5206\u4eab\u4e00\u4e9b\u4f18\u8d28\u7684\u5199\u6cd5\uff1a<\/p>\n

\n

1\u3001\u7528\u6765\u5faa\u73af\u5bb9\u5668\u7684\u6807\u7b7eforEach<\/span><\/strong><\/p>\n

foreach\u5143\u7d20\u7684\u5c5e\u6027\u4e3b\u8981\u6709item\uff0cindex\uff0ccollection\uff0copen\uff0cseparator\uff0cclose\u3002<\/p>\n

    \n
  • \n
    item\uff1a\u96c6\u5408\u4e2d\u5143\u7d20\u8fed\u4ee3\u65f6\u7684\u522b\u540d\uff0c<\/section>\n<\/li>\n
  • \n
    index\uff1a\u96c6\u5408\u4e2d\u5143\u7d20\u8fed\u4ee3\u65f6\u7684\u7d22\u5f15<\/section>\n<\/li>\n
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    open\uff1a\u5e38\u7528\u8bedwhere\u8bed\u53e5\u4e2d\uff0c\u8868\u793a\u4ee5\u4ec0\u4e48\u5f00\u59cb\uff0c\u6bd4\u5982\u4ee5'('\u5f00\u59cb<\/section>\n<\/li>\n
  • \n
    separator\uff1a\u8868\u793a\u5728\u6bcf\u6b21\u8fdb\u884c\u8fed\u4ee3\u65f6\u7684\u5206\u9694\u7b26\uff0c<\/section>\n<\/li>\n
  • \n
    close \u5e38\u7528\u8bedwhere\u8bed\u53e5\u4e2d\uff0c\u8868\u793a\u4ee5\u4ec0\u4e48\u7ed3\u675f\uff0c<\/section>\n<\/li>\n<\/ul>\n

    \u5728\u4f7f\u7528foreach\u7684\u65f6\u5019\u6700\u5173\u952e\u7684\u4e5f\u662f\u6700\u5bb9\u6613\u51fa\u9519\u7684\u5c31\u662fcollection\u5c5e\u6027\uff0c\u8be5\u5c5e\u6027\u662f\u5fc5\u987b\u6307\u5b9a\u7684\uff0c\u4f46\u662f\u5728\u4e0d\u540c\u60c5\u51b5\u4e0b\uff0c\u8be5\u5c5e\u6027\u7684\u503c\u662f\u4e0d\u4e00\u6837\u7684\uff0c\u4e3b\u8981\u6709\u4e00\u4e0b3\u79cd\u60c5\u51b5\uff1a<\/p>\n

      \n
    • \n
      \u5982\u679c\u4f20\u5165\u7684\u662f\u5355\u53c2\u6570\u4e14\u53c2\u6570\u7c7b\u578b\u662f\u4e00\u4e2aList\u7684\u65f6\u5019\uff0ccollection\u5c5e\u6027\u503c\u4e3alist .<\/section>\n<\/li>\n
    • \n
      \u5982\u679c\u4f20\u5165\u7684\u662f\u5355\u53c2\u6570\u4e14\u53c2\u6570\u7c7b\u578b\u662f\u4e00\u4e2aarray\u6570\u7ec4\u7684\u65f6\u5019\uff0ccollection\u7684\u5c5e\u6027\u503c\u4e3aarray .<\/section>\n<\/li>\n
    • \n
      \u5982\u679c\u4f20\u5165\u7684\u53c2\u6570\u662f\u591a\u4e2a\u7684\u65f6\u5019\uff0c\u6211\u4eec\u5c31\u9700\u8981\u628a\u5b83\u4eec\u5c01\u88c5\u6210\u4e00\u4e2aMap\u4e86\uff0c\u5f53\u7136\u5355\u53c2\u6570\u4e5f\u53ef\u4ee5\u5c01\u88c5\u6210map\uff0c\u5b9e\u9645\u4e0a\u5982\u679c\u4f60\u5728\u4f20\u5165\u53c2\u6570\u7684\u65f6\u5019\uff0c\u5728MyBatis\u91cc\u9762\u4e5f\u662f\u4f1a\u628a\u5b83\u5c01\u88c5\u6210\u4e00\u4e2aMap\u7684\uff0cmap\u7684key\u5c31\u662f\u53c2\u6570\u540d\uff0c\u6240\u4ee5\u8fd9\u4e2a\u65f6\u5019collection\u5c5e\u6027\u503c\u5c31\u662f\u4f20\u5165\u7684List\u6216array\u5bf9\u8c61\u5728\u81ea\u5df1\u5c01\u88c5\u7684map\u91cc\u9762\u7684key.<\/section>\n<\/li>\n<\/ul>\n

      \u9488\u5bf9\u6700\u540e\u4e00\u6761\uff0c\u6211\u4eec\u6765\u770b\u4e00\u4e0b\u5b98\u65b9\u8bf4\u6cd5\uff1a<\/p>\n

      \u6ce8\u610f \u4f60\u53ef\u4ee5\u5c06\u4e00\u4e2a List \u5b9e\u4f8b\u6216\u8005\u6570\u7ec4\u4f5c\u4e3a\u53c2\u6570\u5bf9\u8c61\u4f20\u7ed9 MyBatis\uff0c\u5f53\u4f60\u8fd9\u4e48\u505a\u7684\u65f6\u5019\uff0cMyBatis \u4f1a\u81ea\u52a8\u5c06\u5b83\u5305\u88c5\u5728\u4e00\u4e2a Map \u4e2d\u5e76\u4ee5\u540d\u79f0\u4e3a\u952e\u3002List \u5b9e\u4f8b\u5c06\u4f1a\u4ee5\u201clist\u201d\u4f5c\u4e3a\u952e\uff0c\u800c\u6570\u7ec4\u5b9e\u4f8b\u7684\u952e\u5c06\u662f\u201carray\u201d\u3002<\/p><\/blockquote>\n

      \u6240\u4ee5\uff0c\u4e0d\u7ba1\u662f\u591a\u53c2\u6570\u8fd8\u662f\u5355\u53c2\u6570\u7684list,array\u7c7b\u578b\uff0c\u90fd\u53ef\u4ee5\u5c01\u88c5\u4e3amap\u8fdb\u884c\u4f20\u9012\u3002\u5982\u679c\u4f20\u9012\u7684\u662f\u4e00\u4e2aList\uff0c\u5219mybatis\u4f1a\u5c01\u88c5\u4e3a\u4e00\u4e2alist\u4e3akey\uff0clist\u503c\u4e3aobject\u7684map\uff0c\u5982\u679c\u662farray\uff0c\u5219\u5c01\u88c5\u6210\u4e00\u4e2aarray\u4e3akey\uff0carray\u7684\u503c\u4e3aobject\u7684map\uff0c\u5982\u679c\u81ea\u5df1\u5c01\u88c5\u5462\uff0c\u5219colloection\u91cc\u653e\u7684\u662f\u81ea\u5df1\u5c01\u88c5\u7684map\u91cc\u7684key\u503c<\/p>\n

      <\/code><\/pre>\n
      \n
      <!--\u5b9a\u4e49sql\u7247\u6bb5-->\n<sql id=\"orderAndItem\">\n    o.order_id,o.cid,o.address,o.create_date,o.orderitem_id,i.orderitem_id,i.product_id,i.count\n<\/sql>\n<select id=\"findOrderAndItemsByOid\" parameterType=\"java.lang.String\" resultMap=\"BaseResultMap\">\n    select<!--\u5f15\u7528sql\u7247\u6bb5-->\n    <include refid=\"orderAndItem\"\/>\n    fromordertableojoinorderitemiono.orderitem_id=i.orderitem_idwhereo.order_id=#{orderId}\n<\/select><\/pre>\n<\/div>\n
      \u00a0<\/code><\/pre>\n
      \n<\/section>\n
      <\/section>\n
      \n
      \u672c\u7bc7\u6587\u7ae0\u6765\u6e90\u4e8e\u5fae\u4fe1\u516c\u4f17\u53f7: \u7a0b\u5e8f\u5458\u8ffd\u98ce<\/p><\/blockquote>\n<\/div>\n","raw":"","protected":false},"excerpt":{"rendered":"
      \u4e0a\u65b9\u84dd\u8272\u201c\u7a0b\u5e8f\u5458\u8ffd\u98ce\u201d\uff0c\u9009\u62e9\u201c\u8bbe\u4e3a\u661f\u6807\u201d \u56de\u590d\u201c\u8d44\u6599\u201d\u83b7\u53d6\u6574\u7406\u597d\u7684\u9762\u8bd5\u8d44\u6599 \u539f\u6587\uff1ablog.csdn.net\/smile_lg\/a …<\/p>\n","protected":false},"author":1,"featured_media":4703,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"emotion":"","emotion_color":"","title_style":"","license":"","footnotes":""},"categories":[30],"tags":[],"class_list":["post-4708","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-30"],"post_thumbnail_image":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2024\/05\/20240524220929998-150x150.jpeg","content_first_image":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2024\/05\/20240524220935164.webp","post_medium_image_300":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2024\/05\/20240524220929998-300x128.jpeg","post_thumbnail_image_624":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2024\/05\/20240524220929998-1024x436.jpeg","post_frist_image":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2024\/05\/20240524220935164.webp","post_medium_image":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2024\/05\/20240524220929998-300x128.jpeg","post_large_image":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2024\/05\/20240524220929998-1024x436.jpeg","post_full_image":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2024\/05\/20240524220929998.jpeg","post_all_images":[{"imagesurl":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2024\/05\/20240524220935164.webp","id":"image0"},{"imagesurl":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2024\/05\/20240524220935164.webp","id":"image1"}],"videoAdId":"","listAd":"0","listAdId":"","listAdEvery":6,"total_comments":0,"category_name":"\u9762\u8bd5","post_date":"2024-05-17","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":305,"next_post_id":3974,"next_post_title":"\u9762\u8bd5\u5b98\uff1aJava\u4e2d\u7684\u8f6f\u5f15\u7528\u3001\u5f31\u5f15\u7528\u548c\u865a\u5f15\u7528\u6709\u4ec0\u4e48\u533a\u522b\uff1f","previous_post_id":4751,"previous_post_title":"\u7f8e\u56e2\u963f\u91cc\u9762\u8bd5\u8fde\u95ee\uff1aRedis\u4e0eMySQL\u53cc\u5199\u4e00\u81f4\u6027\u5982\u4f55\u5b9e\u73b0\uff1f","_links":{"self":[{"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/posts\/4708","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/comments?post=4708"}],"version-history":[{"count":1,"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/posts\/4708\/revisions"}],"predecessor-version":[{"id":6476,"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/posts\/4708\/revisions\/6476"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/media\/4703"}],"wp:attachment":[{"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/media?parent=4708"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/categories?post=4708"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/tags?post=4708"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}