{"id":64484,"date":"2025-05-03T16:43:02","date_gmt":"2025-05-03T08:43:02","guid":{"rendered":"https:\/\/fwq.ai\/blog\/64484\/"},"modified":"2025-05-03T16:43:02","modified_gmt":"2025-05-03T08:43:02","slug":"java-sql%e6%9f%a5%e8%af%a2%ef%bc%9a%e5%a6%82%e4%bd%95%e7%b2%be%e5%87%86%e8%bf%94%e5%9b%9e%e5%a4%9a%e4%b8%aa%e8%a1%a8%e7%89%b9%e5%ae%9a%e5%ad%97%e6%ae%b5%ef%bc%9f-2","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/64484\/","title":{"rendered":"Java SQL\u67e5\u8be2\uff1a\u5982\u4f55\u7cbe\u51c6\u8fd4\u56de\u591a\u4e2a\u8868\u7279\u5b9a\u5b57\u6bb5\uff1f"},"content":{"rendered":"

\"Java<\/p>\n

java sql\u67e5\u8be2\uff1a\u5982\u4f55\u7cbe\u51c6\u8fd4\u56de\u591a\u4e2a\u8868\u5b57\u6bb5<\/strong><\/p>\n

\u5728java sql\u4e2d\uff0c\u5982\u679c\u5e0c\u671b\u67e5\u8be2\u591a\u4e2a\u8868\u5e76\u53ea\u8fd4\u56de\u5176\u4e2d\u7279\u5b9a\u7684\u5b57\u6bb5\uff0c\u786e\u4fdd\u53ea\u8fd4\u56de\u6240\u9700\u7684\u5b57\u6bb5\u975e\u5e38\u91cd\u8981\u3002\u8fd9\u4e2a\u95ee\u9898\u7684\u7126\u70b9\u662f\u5982\u4f55\u9632\u6b62\u67e5\u8be2\u8fd4\u56de\u4e0d\u9700\u8981\u7684\u5b57\u6bb5\u3002<\/p>\n

\u95ee\u9898<\/strong><\/p>\n

\u5982\u95ee\u9898\u6240\u8ff0\uff0c\u5728\u67e5\u8be2\u4e2d\u6307\u5b9a\u4e86”status”\u5b57\u6bb5\u65f6\uff0cb\u5904\u4f1a\u8fd4\u56de1\u3002\u7136\u800c\uff0c\u5f53”status”\u5b57\u6bb5\u672a\u6307\u5b9a\u65f6\uff0c\u5373\u4f7f\u5b83\u5b9e\u9645\u4e0a\u4e0d\u5b58\u5728\uff0cb\u5904\u4ecd\u7136\u4f1a\u6709\u4e00\u4e2a\u540d\u4e3a”status”\u7684\u5b57\u6bb5\uff0c\u4f46\u5176\u503c\u4e3anull\u3002\u8fd9\u5bfc\u81f4\u4e86\u4e0d\u60f3\u8981\u7684\u8fd4\u56de\u5b57\u6bb5\u3002<\/p>\n

\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n

\u89e3\u51b3\u65b9\u6cd5<\/strong><\/p>\n

\u8981\u907f\u514d\u8fd9\u79cd\u60c5\u51b5\uff0c\u53ef\u4ee5\u4f7f\u7528mybatis\u7684select\u6807\u7b7e\u4e2d\u7684”resulttype”\u5c5e\u6027\u3002\u8be5\u5c5e\u6027\u7528\u4e8e\u6307\u5b9a\u67e5\u8be2\u7ed3\u679c\u7684\u7c7b\u578b\uff0c\u5b83\u53ef\u4ee5\u662f\u4e00\u4e2apojo\uff08\u666e\u901ajava\u5bf9\u8c61\uff09\u6216\u4e00\u4e2amap\u3002\u901a\u8fc7\u6307\u5b9a”resulttype”\uff0cmybatis\u5c06\u53ea\u8fd4\u56de\u4e0e\u8be5\u7c7b\u578b\u5339\u914d\u7684\u5b57\u6bb5\uff0c\u5ffd\u7565\u5176\u4ed6\u5b57\u6bb5\u3002<\/p>\n

\u793a\u4f8b<\/strong><\/p>\n

\u4ee5\u4e0b\u4ee3\u7801\u793a\u4f8b\u6f14\u793a\u4e86\u5982\u4f55\u5728mybatis\u4e2d\u4f7f\u7528”resulttype”\u6765\u63a7\u5236\u8fd4\u56de\u7684\u5b57\u6bb5\uff1a<\/p>\n

<select id=\"getLimitedFields\" resultType=\"com.example.domain.LimitedFields\">\n  SELECT id, name\n  FROM employee\n<\/select><\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u5728\u4e0a\u9762\u7684\u793a\u4f8b\u4e2d\uff0c”resulttype”\u5c5e\u6027\u88ab\u8bbe\u7f6e\u4e3a”com.example.domn.limitedfields”\uff0c\u5b83\u662f\u4e00\u4e2a\u53ea\u5305\u542b”id”\u548c”name”\u5b57\u6bb5\u7684pojo\u3002\u8fd9\u5c06\u786e\u4fdd\u67e5\u8be2\u53ea\u8fd4\u56de\u8fd9\u4e24\u4e2a\u5b57\u6bb5\uff0c\u800c\u5ffd\u7565\u5176\u4ed6\u5b57\u6bb5\uff08\u4f8b\u5982”status”\uff09\u3002<\/p>\n
\u901a\u8fc7\u4f7f\u7528mybatis\u7684”resulttype”\u5c5e\u6027\uff0c\u53ef\u4ee5\u7cbe\u786e\u5730\u63a7\u5236sql\u67e5\u8be2\u8fd4\u56de\u7684\u5b57\u6bb5\uff0c\u4ece\u800c\u907f\u514d\u4e0d\u5fc5\u8981\u7684\u5b57\u6bb5\u8fd4\u56de\u3002<\/p>\n
\u4ee5\u4e0a\u5c31\u662fJava SQL\u67e5\u8be2\uff1a\u5982\u4f55\u7cbe\u51c6\u8fd4\u56de\u591a\u4e2a\u8868\u7279\u5b9a\u5b57\u6bb5\uff1f\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8IDCBABY\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
java sql\u67e5\u8be2\uff1a\u5982\u4f55\u7cbe\u51c6\u8fd4\u56de\u591a\u4e2a\u8868\u5b57\u6bb5 \u5728java sql\u4e2d\uff0c\u5982\u679c\u5e0c\u671b\u67e5\u8be2\u591a\u4e2a\u8868\u5e76\u53ea\u8fd4\u56de\u5176\u4e2d\u7279\u5b9a\u7684\u5b57\u6bb5\uff0c\u786e\u4fdd\u53ea\u8fd4\u56de\u6240\u9700\u7684\u5b57\u6bb5\u975e\u5e38\u91cd\u8981\u3002\u8fd9\u4e2a\u95ee\u9898\u7684\u7126\u70b9\u662f\u5982\u4f55\u9632\u6b62\u67e5\u8be2\u8fd4\u56de\u4e0d\u9700\u8981\u7684\u5b57\u6bb5\u3002 \u95ee\u9898 \u5982\u95ee\u9898\u6240\u8ff0\uff0c\u5728\u67e5\u8be2\u4e2d\u6307\u5b9a\u4e86”status”\u5b57\u6bb5\u65f6\uff0cb\u5904\u4f1a\u8fd4\u56de1\u3002\u7136\u800c\uff0c\u5f53”status”\u5b57\u6bb5\u672a\u6307\u5b9a\u65f6\uff0c\u5373\u4f7f\u5b83\u5b9e\u9645\u4e0a\u4e0d\u5b58\u5728\uff0cb\u5904\u4ecd\u7136\u4f1a\u6709\u4e00\u4e2a\u540d\u4e3a”status”\u7684\u5b57\u6bb5\uff0c\u4f46\u5176\u503c\u4e3anull\u3002\u8fd9\u5bfc\u81f4\u4e86\u4e0d\u60f3\u8981\u7684\u8fd4\u56de\u5b57\u6bb5\u3002 \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b \u89e3\u51b3\u65b9\u6cd5 \u8981\u907f\u514d\u8fd9\u79cd\u60c5\u51b5\uff0c\u53ef\u4ee5\u4f7f\u7528mybatis\u7684select\u6807\u7b7e\u4e2d\u7684”resulttype”\u5c5e\u6027\u3002\u8be5\u5c5e\u6027\u7528\u4e8e\u6307\u5b9a\u67e5\u8be2\u7ed3\u679c\u7684\u7c7b\u578b\uff0c\u5b83\u53ef\u4ee5\u662f\u4e00\u4e2apojo\uff08\u666e\u901ajava\u5bf9\u8c61\uff09\u6216\u4e00\u4e2amap\u3002\u901a\u8fc7\u6307\u5b9a”resulttype”\uff0cmybatis\u5c06\u53ea\u8fd4\u56de\u4e0e\u8be5\u7c7b\u578b\u5339\u914d\u7684\u5b57\u6bb5\uff0c\u5ffd\u7565\u5176\u4ed6\u5b57\u6bb5\u3002 \u793a\u4f8b \u4ee5\u4e0b\u4ee3\u7801\u793a\u4f8b\u6f14\u793a\u4e86\u5982\u4f55\u5728mybatis\u4e2d\u4f7f\u7528”resulttype”\u6765\u63a7\u5236\u8fd4\u56de\u7684\u5b57\u6bb5\uff1a <select id=”getLimitedFields” resultType=”com.example.domain.LimitedFields”> SELECT id, name FROM employee <\/select> \u767b\u5f55\u540e\u590d\u5236 \u5728\u4e0a\u9762\u7684\u793a\u4f8b\u4e2d\uff0c”resulttype”\u5c5e\u6027\u88ab\u8bbe\u7f6e\u4e3a”com.example.domn.limitedfields”\uff0c\u5b83\u662f\u4e00\u4e2a\u53ea\u5305\u542b”id”\u548c”name”\u5b57\u6bb5\u7684pojo\u3002\u8fd9\u5c06\u786e\u4fdd\u67e5\u8be2\u53ea\u8fd4\u56de\u8fd9\u4e24\u4e2a\u5b57\u6bb5\uff0c\u800c\u5ffd\u7565\u5176\u4ed6\u5b57\u6bb5\uff08\u4f8b\u5982”status”\uff09\u3002 \u901a\u8fc7\u4f7f\u7528mybatis\u7684”resulttype”\u5c5e\u6027\uff0c\u53ef\u4ee5\u7cbe\u786e\u5730\u63a7\u5236sql\u67e5\u8be2\u8fd4\u56de\u7684\u5b57\u6bb5\uff0c\u4ece\u800c\u907f\u514d\u4e0d\u5fc5\u8981\u7684\u5b57\u6bb5\u8fd4\u56de\u3002 \u4ee5\u4e0a\u5c31\u662fJava SQL\u67e5\u8be2\uff1a\u5982\u4f55\u7cbe\u51c6\u8fd4\u56de\u591a\u4e2a\u8868\u7279\u5b9a\u5b57\u6bb5\uff1f\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8IDCBABY\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-64484","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/64484","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=64484"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/64484\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=64484"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=64484"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=64484"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}