{"id":10006286,"date":"2022-08-23T08:59:33","date_gmt":"2022-08-23T00:59:33","guid":{"rendered":"https:\/\/ityet.com\/?p=10006286"},"modified":"2022-08-23T08:59:33","modified_gmt":"2022-08-23T00:59:33","slug":"%e9%9d%a2%e8%af%95%e7%aa%81%e5%87%bb76%ef%bc%9a-%e5%92%8c-%e6%9c%89%e4%bb%80%e4%b9%88%e5%8c%ba%e5%88%ab%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/itmax.cn\/?p=10006286","title":{"rendered":"\u9762\u8bd5\u7a81\u51fb76\uff1a${} \u548c #{} \u6709\u4ec0\u4e48\u533a\u522b\uff1f"},"content":{"rendered":"

${}<\/code> \u548c #{} \u90fd\u662f MyBatis \u4e2d\u7528\u6765\u66ff\u6362\u53c2\u6570\u7684\uff0c\u5b83\u4eec\u90fd\u53ef\u4ee5\u5c06\u7528\u6237\u4f20\u9012\u8fc7\u6765\u7684\u53c2\u6570\uff0c\u66ff\u6362\u5230 MyBatis \u6700\u7ec8\u751f\u6210\u7684 SQL \u4e2d\uff0c\u4f46\u5b83\u4eec\u533a\u522b\u5374\u662f\u5f88\u5927\u7684\uff0c\u63a5\u4e0b\u6765\u6211\u4eec\u4e00\u8d77\u6765\u770b\u3002<\/p>\n

1.\u529f\u80fd\u4e0d\u540c<\/h2>\n

${} \u662f\u5c06\u53c2\u6570\u76f4\u63a5\u66ff\u6362\u5230 SQL \u4e2d<\/strong>\uff0c\u6bd4\u5982\u4ee5\u4e0b\u4ee3\u7801\uff1a<\/p>\n

<select id="getUserById" resultType="com.example.demo.model.UserInfo">\n    select * from userinfo where id=${id}\n<\/select><\/code><\/pre>\n
\u6700\u7ec8\u751f\u6210\u7684\u6267\u884c SQL \u5982\u4e0b\uff1a
\"image.png\"
\u4ece\u4e0a\u56fe\u53ef\u4ee5\u770b\u51fa\uff0c\u4e4b\u524d\u7684\u53c2\u6570 ${id} \u88ab\u76f4\u63a5\u66ff\u6362\u6210\u5177\u4f53\u7684\u53c2\u6570\u503c 1 \u4e86\u3002
\u800c #{} \u5219\u662f\u4f7f\u7528\u5360\u4f4d\u7b26\u7684\u65b9\u5f0f\uff0c\u7528\u9884\u5904\u7406\u7684\u65b9\u5f0f\u6765\u6267\u884c\u4e1a\u52a1<\/strong>\uff0c\u6211\u4eec\u5c06\u4e0a\u9762\u7684\u6848\u4f8b\u6539\u9020\u4e3a #{} \u7684\u5f62\u5f0f\uff0c\u5b9e\u73b0\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
<select id="getUserById" resultType="com.example.demo.model.UserInfo">\n    select * from userinfo where id=#{id}\n<\/select><\/code><\/pre>\n
\u6700\u7ec8\u751f\u6210\u7684 SQL \u5982\u4e0b\uff1a
\"image.png\"<\/p>\n
${} \u7684\u95ee\u9898<\/h3>\n
\u5f53\u53c2\u6570\u4e3a\u6570\u503c\u7c7b\u578b\u65f6\uff08\u5728\u4e0d\u8003\u8651\u5b89\u5168\u95ee\u9898\u7684\u524d\u63d0\u4e0b\uff09\uff0c${}<\/code> \u548c #{} \u7684\u6267\u884c\u6548\u679c\u90fd\u662f\u4e00\u6837\u7684\uff0c\u7136\u800c\u5f53\u53c2\u6570\u7684\u7c7b\u578b\u4e3a\u5b57\u7b26\u65f6\uff0c\u518d\u4f7f\u7528 ${} \u5c31\u6709\u95ee\u9898\u4e86\uff0c\u5982\u4e0b\u4ee3\u7801\u6240\u793a\uff1a<\/p>\n
<select id="getUserByName" resultType="com.example.demo.model.UserInfo">\n    select * from userinfo where name=${name}\n<\/select><\/code><\/pre>\n
\u4ee5\u4e0a\u7a0b\u5e8f\u6267\u884c\u65f6\uff0c\u751f\u6210\u7684 SQL \u8bed\u53e5\u5982\u4e0b\uff1a
\"image.png\"
\u8fd9\u6837\u5c31\u4f1a\u5bfc\u81f4\u7a0b\u5e8f\u62a5\u9519\uff0c\u56e0\u4e3a\u4f20\u9012\u7684\u53c2\u6570\u662f\u5b57\u7b26\u7c7b\u578b\u7684\uff0c\u800c\u5728 SQL \u7684\u8bed\u6cd5\u4e2d\uff0c\u5982\u679c\u662f\u5b57\u7b26\u7c7b\u578b\u9700\u8981\u7ed9\u503c\u6dfb\u52a0\u5355\u5f15\u53f7\uff0c\u5426\u5219\u5c31\u4f1a\u62a5\u9519\uff0c\u800c ${}<\/code> \u662f\u76f4\u63a5\u66ff\u6362\uff0c\u4e0d\u4f1a\u81ea\u52a8\u6dfb\u52a0\u5355\u5f15\u53f7\uff0c\u6240\u4ee5\u6267\u884c\u5c31\u62a5\u9519\u4e86\u3002
\u800c\u4f7f\u7528 #{} \u91c7\u7528\u7684\u662f\u5360\u4f4d\u7b26\u9884\u6267\u884c\u7684\uff0c\u6240\u4ee5\u4e0d\u5b58\u5728\u4efb\u4f55\u95ee\u9898\uff0c\u5b83\u7684\u5b9e\u73b0\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
<select id="getUserByName" resultType="com.example.demo.model.UserInfo">\n    select * from userinfo where name=#{name}\n<\/select><\/code><\/pre>\n
\u4ee5\u4e0a\u7a0b\u5e8f\u6700\u7ec8\u751f\u6210\u7684\u6267\u884c SQL \u5982\u4e0b\uff1a
\"image.png\"<\/p>\n
2.\u4f7f\u7528\u573a\u666f\u4e0d\u540c<\/h2>\n
\u867d\u7136\u4f7f\u7528 #{} \u7684\u65b9\u5f0f\u53ef\u4ee5\u5904\u7406\u4efb\u610f\u7c7b\u578b\u7684\u53c2\u6570\uff0c\u7136\u800c\u5f53\u4f20\u9012\u7684\u53c2\u6570\u662f\u4e00\u4e2a SQL \u547d\u4ee4\u6216 SQL \u5173\u952e\u5b57\u65f6 #{} \u5c31\u4f1a\u51fa\u95ee\u9898\u4e86\u3002\u6bd4\u5982\uff0c\u5f53\u6211\u4eec\u8981\u6839\u636e\u4ef7\u683c\u4ece\u9ad8\u5230\u4f4e\uff08\u5012\u5e8f\uff09\u3001\u6216\u4ece\u4f4e\u5230\u9ad8\uff08\u6b63\u5e8f\uff09\u67e5\u8be2\u65f6\uff0c\u5982\u4e0b\u56fe\u6240\u793a\uff1a
\"image.png\"
\u6b64\u65f6\u6211\u4eec\u8981\u4f20\u9012\u7684\u6392\u5e8f\u7684\u5173\u952e\u5b57\uff0cdesc \u5012\u5e8f\uff08\u4ef7\u683c\u4ece\u9ad8\u5230\u4f4e\uff09\u6216\u8005\u662f asc \u6b63\u5e8f\uff08\u4ef7\u683c\u4ece\u4f4e\u5230\u9ad8\uff09\uff0c\u6b64\u65f6\u6211\u4eec\u4f7f\u7528 ${}<\/code> \u7684\u5b9e\u73b0\u4ee3\u7801\u745e\u5b89\uff1a<\/p>\n
<select id="getAll" resultType="com.example.demo.model.Goods">\n  select * from goods order by price ${sort}\n<\/select><\/code><\/pre>\n
\u4ee5\u4e0a\u4ee3\u7801\u751f\u6210\u7684\u6267\u884c SQL \u548c\u8fd0\u884c\u7ed3\u679c\u5982\u4e0b\uff1a
\"image.png\"
\u4f46\u662f\uff0c\u5982\u679c\u5c06\u4ee3\u7801\u4e2d\u7684 ${} \u6539\u4e3a #{}\uff0c\u90a3\u4e48\u7a0b\u5e8f\u6267\u884c\u5c31\u4f1a\u62a5\u9519\uff0c#{} \u7684\u5b9e\u73b0\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
<select id="getAll" resultType="com.example.demo.model.Goods">\n  select * from goods order by price #{sort}\n<\/select><\/code><\/pre>\n
\u4ee5\u4e0a\u4ee3\u7801\u751f\u6210\u7684\u6267\u884c SQL \u548c\u8fd0\u884c\u7ed3\u679c\u5982\u4e0b\uff1a
\"image.png\"
\u4ece\u4e0a\u8ff0\u7684\u6267\u884c\u7ed3\u679c\u6211\u4eec\u53ef\u4ee5\u770b\u51fa\uff1a\u5f53\u4f20\u9012\u7684\u662f\u666e\u901a\u53c2\u6570\u65f6\uff0c\u9700\u8981\u4f7f\u7528 #{} \u7684\u65b9\u5f0f\uff0c\u800c\u5f53\u4f20\u9012\u7684\u662f SQL \u547d\u4ee4\u6216 SQL \u5173\u952e\u5b57\u65f6\uff0c\u9700\u8981\u4f7f\u7528 ${}<\/code> \u6765\u5bf9 SQL \u4e2d\u7684\u53c2\u6570\u8fdb\u884c\u76f4\u63a5\u66ff\u6362\u5e76\u6267\u884c\u3002<\/strong><\/p>\n
3.\u5b89\u5168\u6027\u4e0d\u540c<\/h2>\n
${}<\/code> \u548c #{} \u6700\u4e3b\u8981\u7684\u533a\u522b\u4f53\u73b0\u5728\u5b89\u5168\u65b9\u9762\uff0c\u5f53\u4f7f\u7528 ${}<\/code> \u4f1a\u51fa\u73b0\u5b89\u5168\u95ee\u9898\uff0c\u4e5f\u5c31\u662f SQL \u6ce8\u5165\u7684\u95ee\u9898\uff0c\u800c\u4f7f\u7528 #{} \u56e0\u4e3a\u662f\u9884\u5904\u7406\u7684\uff0c\u6240\u4ee5\u4e0d\u4f1a\u5b58\u5728\u5b89\u5168\u95ee\u9898<\/strong>\uff0c\u6211\u4eec\u901a\u8fc7\u4e0b\u9762\u7684\u767b\u5f55\u529f\u80fd\u6765\u89c2\u5bdf\u4e00\u4e0b\u4e8c\u8005\u7684\u533a\u522b\u3002<\/p>\n
3.1 \u4f7f\u7528 ${} \u5b9e\u73b0\u7528\u6237\u767b\u5f55<\/h3>\n
UserMapper.xml \u4e2d\u7684\u5b9e\u73b0\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
<select id="login" resultType="com.example.demo.model.UserInfo">\n  select * from userinfo where name='${name}' and password='${password}'\n<\/select><\/code><\/pre>\n
\u5355\u5143\u6d4b\u8bd5\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
@Test\nvoid login() {\n    UserInfo userInfo = userMapper.login("java", "java");\n    System.out.println(userInfo);\n}<\/code><\/pre>\n
\u4ee5\u4e0a\u4ee3\u7801\u751f\u6210\u7684\u6267\u884c SQL \u548c\u8fd0\u884c\u7ed3\u679c\u5982\u4e0b\uff1a
\"image.png\"
\u4ece\u7ed3\u679c\u53ef\u4ee5\u770b\u51fa\uff0c\u5f53\u6211\u4eec\u4f20\u5165\u4e86\u6b63\u786e\u7684\u7528\u6237\u540d\u548c\u5bc6\u7801\u65f6\uff0c\u80fd\u6210\u529f\u7684\u67e5\u8be2\u5230\u6570\u636e\u3002\u4f46\u662f\uff0c\u5728\u6211\u4eec\u4f7f\u7528 ${}<\/code> \u65f6\uff0c\u5f53\u6211\u4eec\u5728\u4e0d\u77e5\u9053\u6b63\u786e\u5bc6\u7801\u7684\u60c5\u51b5\u4e0b\uff0c\u4f7f\u7528 SQL \u6ce8\u5165\u8bed\u53e5\u4e5f\u80fd\u7528\u6237\u7684\u79c1\u4eba\u4fe1\u606f\uff0cSQL \u6ce8\u5165\u7684\u5b9e\u73b0\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
@Test\nvoid login() {\n    UserInfo userInfo = userMapper.login("java", "' or 1='1");\n    System.out.println(userInfo);\n}<\/code><\/pre>\n
\u4ee5\u4e0a\u4ee3\u7801\u751f\u6210\u7684\u6267\u884c SQL \u548c\u8fd0\u884c\u7ed3\u679c\u5982\u4e0b\uff1a
\"image.png\"
\u4ece\u4e0a\u8ff0\u7ed3\u679c\u53ef\u4ee5\u770b\u51fa\uff0c\u5f53\u4f7f\u7528 ${} \u65f6\uff0c\u5728\u4e0d\u77e5\u9053\u6b63\u786e\u5bc6\u7801\u7684\u60c5\u51b5\u4e0b\u4e5f\u80fd\u5f97\u5230\u7528\u6237\u7684\u79c1\u4eba\u6570\u636e\uff0c\u8fd9\u5c31\u50cf\u4e00\u4e2a\u5c0f\u5077\u5728\u6ca1\u6709\u4f60\u4eec\u5bb6\u94a5\u5319\u7684\u60c5\u51b5\u4e0b\uff0c\u4e5f\u80fd\u8f7b\u677e\u7684\u6253\u5f00\u4f60\u4eec\u5bb6\u5927\u95e8\u4e00\u6837<\/strong>\uff0c\u8fd9\u662f\u4f55\u5176\u6050\u6016\u7684\u4e8b\u60c5\u3002\u90a3\u4f7f\u7528 #{} \u6709\u6ca1\u6709\u5b89\u5168\u95ee\u9898\u5462\uff1f\u63a5\u4e0b\u6765\u6211\u4eec\u6765\u6d4b\u8bd5\u4e00\u4e0b\u3002<\/p>\n
3.2 \u4f7f\u7528 #{} \u5b9e\u73b0\u7528\u6237\u767b\u5f55<\/h3>\n
\u9996\u5148\u5c06 UserMapper.xml \u4e2d\u7684\u4ee3\u7801\u6539\u6210\u4ee5\u4e0b\u5185\u5bb9\uff1a<\/p>\n
<select id="login" resultType="com.example.demo.model.UserInfo">\n  select * from userinfo where name=#{name} and password=#{password}\n<\/select><\/code><\/pre>\n
\u63a5\u7740\u6211\u4eec\u4f7f\u7528\u4e0a\u9762\u7684 SQL \u6ce8\u5165\u6765\u6d4b\u8bd5\u767b\u5f55\u529f\u80fd\uff1a<\/p>\n
@Test\nvoid login() {\n    UserInfo userInfo = userMapper.login("java", "' or 1='1");\n    System.out.println(userInfo);\n}<\/code><\/pre>\n
\u6700\u7ec8\u751f\u6210\u7684 SQL \u548c\u6267\u884c\u7ed3\u679c\u5982\u4e0b\uff1a
\"image.png\"
\u4ece\u4e0a\u8ff0\u4ee3\u7801\u53ef\u4ee5\u770b\u51fa\uff0c\u4f7f\u7528 SQL \u6ce8\u5165\u662f\u65e0\u6cd5\u653b\u7834 #{} \u7684\u201c\u5927\u95e8\u201d\u7684\uff0c\u6240\u4ee5\u53ef\u4ee5\u653e\u5fc3\u4f7f\u7528\u3002<\/strong><\/p>\n
\u603b\u7ed3<\/h2>\n
${}<\/code> \u548c #{} \u90fd\u662f MyBatis \u4e2d\u7528\u6765\u66ff\u6362\u53c2\u6570\u7684\uff0c\u5b83\u4eec\u4e8c\u8005\u7684\u533a\u522b\u4e3b\u8981\u4f53\u73b0\u5728\uff1a1\u3001\u529f\u80fd\u4e0d\u540c\uff1a${}<\/code> \u662f\u76f4\u63a5\u66ff\u6362\uff0c\u800c #{} \u662f\u9884\u5904\u7406\uff1b2\u3001\u4f7f\u7528\u573a\u666f\u4e0d\u540c\uff1a\u666e\u901a\u53c2\u6570\u4f7f\u7528 #{}\uff0c\u5982\u679c\u4f20\u9012\u7684\u662f SQL \u547d\u4ee4\u6216 SQL \u5173\u952e\u5b57\uff0c\u9700\u8981\u4f7f\u7528 ${}<\/code>\uff0c\u4f46\u5728\u4f7f\u7528\u524d\u4e00\u5b9a\u8981\u505a\u597d\u5b89\u5168\u9a8c\u8bc1\uff1b3\u3001\u5b89\u5168\u6027\u4e0d\u540c\uff1a\u4f7f\u7528 ${}<\/code> \u5b58\u5728\u5b89\u5168\u95ee\u9898\uff0c\u800c #{} \u5219\u4e0d\u5b58\u5728\u5b89\u5168\u95ee\u9898\u3002<\/p>\n
\n
\u662f\u975e\u5ba1\u4e4b\u4e8e\u5df1\uff0c\u6bc1\u8a89\u542c\u4e4b\u4e8e\u4eba\uff0c\u5f97\u5931\u5b89\u4e4b\u4e8e\u6570\u3002<\/p>\n
\u516c\u4f17\u53f7\uff1aJava\u9762\u8bd5\u771f\u9898\u89e3\u6790<\/p>\n
\u9762\u8bd5\u5408\u96c6\uff1ahttps:\/\/gitee.com\/mydb\/interview<\/a><\/p>\n<\/blockquote>\n
https:\/\/segmentfault.com\/a\/1190000042360188<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
${} \u548c #{} \u90fd\u662f MyBatis \u4e2d\u7528\u6765\u66ff\u6362\u53c2\u6570\u7684\uff0c\u5b83\u4eec\u90fd\u53ef\u4ee5\u5c06\u7528\u6237\u4f20\u9012\u8fc7\u6765\u7684\u53c2\u6570\uff0c\u66ff\u6362\u5230 MyBat […]<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[],"tags":[],"class_list":["post-10006286","post","type-post","status-publish","format-standard","hentry"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts\/10006286","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=10006286"}],"version-history":[{"count":0,"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts\/10006286\/revisions"}],"wp:attachment":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=10006286"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=10006286"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=10006286"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}