{"id":4024,"date":"2024-08-20T14:33:58","date_gmt":"2024-08-20T06:33:58","guid":{"rendered":"https:\/\/qaqaq.top\/?p=4024"},"modified":"2024-08-20T14:36:46","modified_gmt":"2024-08-20T06:36:46","slug":"mybatis-plus%e4%b9%90%e8%a7%82%e9%94%81%e6%8f%92%e4%bb%b6","status":"publish","type":"post","link":"https:\/\/qaqaq.top\/?p=4024","title":{"rendered":"MyBatis-Plus\u4e50\u89c2\u9501\u63d2\u4ef6"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">\u573a\u666f<\/h2>\n\n\n\n<p>\u4e00\u4ef6\u5546\u54c1\uff0c\u6210\u672c\u4ef7\u662f80\u5143\uff0c\u552e\u4ef7\u662f100\u5143\u3002\u8001\u677f\u5148\u662f\u901a\u77e5\u5c0f\u674e\uff0c\u8bf4\u4f60\u53bb\u628a\u5546\u54c1\u4ef7\u683c\u589e\u52a050\u5143\u3002\u5c0f\u674e\u6b63\u5728\u73a9\u6e38\u620f\uff0c\u803d\u6401\u4e86\u4e00\u4e2a\u5c0f\u65f6\u3002\u6b63\u597d\u4e00\u4e2a\u5c0f\u65f6\u540e\uff0c\u8001\u677f\u89c9\u5f97\u5546\u54c1\u4ef7\u683c\u589e\u52a0\u5230150\u5143\uff0c\u4ef7\u683c\u592a\u9ad8\uff0c\u53ef\u80fd\u4f1a\u5f71\u54cd\u9500\u91cf\u3002\u53c8\u901a\u77e5\u5c0f\u738b\uff0c\u4f60\u628a\u5546\u54c1\u4ef7\u683c\u964d\u4f4e30\u5143\u3002<\/p>\n\n\n\n<p>\u6b64\u65f6\uff0c\u5c0f\u674e\u548c\u5c0f\u738b\u540c\u65f6\u64cd\u4f5c\u5546\u54c1\u540e\u53f0\u7cfb\u7edf\u3002\u5c0f\u674e\u64cd\u4f5c\u7684\u65f6\u5019\uff0c\u7cfb\u7edf\u5148\u53d6\u51fa\u5546\u54c1\u4ef7\u683c100\u5143\uff1b\u5c0f\u738b\u4e5f\u5728\u64cd\u4f5c\uff0c\u53d6\u51fa\u7684\u5546\u54c1\u4ef7\u683c\u4e5f\u662f100\u5143\u3002\u5c0f\u674e\u5c06\u4ef7\u683c\u52a0\u4e8650\u5143\uff0c\u5e76\u5c06100+50=150\u5143\u5b58\u5165\u4e86\u6570\u636e\u5e93\uff1b\u5c0f\u738b\u5c06\u5546\u54c1\u51cf\u4e8630\u5143\uff0c\u5e76\u5c06100-30=70\u5143\u5b58\u5165\u4e86\u6570\u636e\u5e93\u3002\u662f\u7684\uff0c\u5982\u679c\u6ca1\u6709\u9501\uff0c\u5c0f\u674e\u7684\u64cd\u4f5c\u5c31\u5b8c\u5168\u88ab\u5c0f\u738b\u7684\u8986\u76d6\u4e86\u3002<\/p>\n\n\n\n<p>\u73b0\u5728\u5546\u54c1\u4ef7\u683c\u662f70\u5143\uff0c\u6bd4\u6210\u672c\u4ef7\u4f4e10\u5143\u3002\u51e0\u5206\u949f\u540e\uff0c\u8fd9\u4e2a\u5546\u54c1\u5f88\u5feb\u51fa\u552e\u4e861\u5343\u591a\u4ef6\u5546\u54c1\uff0c\u8001\u677f\u4e8f1\u4e07\u591a\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e50\u89c2\u9501\u4e0e\u60b2\u89c2\u9501<\/h2>\n\n\n\n<p>\u4e0a\u9762\u7684\u6545\u4e8b\uff0c\u5982\u679c\u662f\u4e50\u89c2\u9501\uff0c\u5c0f\u738b\u4fdd\u5b58\u4ef7\u683c\u524d\uff0c\u4f1a\u68c0\u67e5\u4e0b\u4ef7\u683c\u662f\u5426\u88ab\u4eba\u4fee\u6539\u8fc7\u4e86\u3002\u5982\u679c\u88ab\u4fee\u6539\u8fc7\u4e86\uff0c\u5219\u91cd\u65b0\u53d6\u51fa\u7684\u88ab\u4fee\u6539\u540e\u7684\u4ef7\u683c\uff0c150\u5143\uff0c\u8fd9\u6837\u4ed6\u4f1a\u5c06120\u5143\u5b58\u5165\u6570\u636e\u5e93\u3002<\/p>\n\n\n\n<p>\u5982\u679c\u662f\u60b2\u89c2\u9501\uff0c\u5c0f\u674e\u53d6\u51fa\u6570\u636e\u540e\uff0c\u5c0f\u738b\u53ea\u80fd\u7b49\u5c0f\u674e\u64cd\u4f5c\u5b8c\u4e4b\u540e\uff0c\u624d\u80fd\u5bf9\u4ef7\u683c\u8fdb\u884c\u64cd\u4f5c\uff0c\u4e5f\u4f1a\u4fdd\u8bc1\u6700\u7ec8\u7684\u4ef7\u683c\u662f120\u5143\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u6a21\u62df\u4fee\u6539\u51b2\u7a81<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">1\u3001\u6570\u636e\u5e93\u4e2d\u589e\u52a0\u5546\u54c1\u8868<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>-- \u589e\u52a0\u5546\u54c1\u8868\nCREATE TABLE t_product\n(\nid BIGINT(20) NOT NULL COMMENT '\u4e3b\u952eID',\nNAME VARCHAR(30) NULL DEFAULT NULL COMMENT '\u5546\u54c1\u540d\u79f0',\nprice INT(11) DEFAULT 0 COMMENT '\u4ef7\u683c',\nVERSION INT(11) DEFAULT 0 COMMENT '\u4e50\u89c2\u9501\u7248\u672c\u53f7',\nPRIMARY KEY (id)\n);<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">2\u3001\u6dfb\u52a0\u6570\u636e<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>INSERT INTO t_product (id, NAME, price) VALUES (1, '\u5916\u661f\u4eba\u7b14\u8bb0\u672c', 100);<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">3\u3001\u6dfb\u52a0\u5b9e\u4f53<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>@Data\npublic class Product {\n\n    private Long id;\n\n    private String name;\n\n    private Integer price;\n\n    private Integer version;\n\n}<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">4\u3001\u6dfb\u52a0mapper<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>@Repository\npublic interface ProductMapper extends BaseMapper&lt;Product&gt; {\n\n}<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">5\u3001\u6d4b\u8bd5<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>    @Test\n    public void testProduct01() {\n        \/\/\u5c0f\u674e\u67e5\u8be2\u5546\u54c1\u4ef7\u683c\n        Product productLi = productMapper.selectById(1);\n        System.out.println(\"\u5c0f\u674e\u67e5\u8be2\u7684\u5546\u54c1\u4ef7\u683c\uff1a\" + productLi.getPrice());\n        \/\/\u5c0f\u738b\u67e5\u8be2\u5546\u54c1\u4ef7\u683c\n        Product productWang = productMapper.selectById(1);\n        System.out.println(\"\u5c0f\u738b\u67e5\u8be2\u7684\u5546\u54c1\u4ef7\u683c\uff1a\" + productWang.getPrice());\n        \/\/\u5c0f\u674e\u5c06\u5546\u54c1\u4ef7\u683c+50\n        productLi.setPrice(productLi.getPrice() + 50);\n        productMapper.updateById(productLi);\n        \/\/\u5c0f\u738b\u5c06\u5546\u54c1\u4ef7\u683c-30\n        productWang.setPrice(productLi.getPrice() - 30);\n        int result = productMapper.updateById(productWang);\n        \/\/\u8001\u677f\u67e5\u8be2\u5546\u54c1\u4ef7\u683c\n        Product productLaoBan = productMapper.selectById(1);\n        System.out.println(\"\u8001\u677f\u67e5\u8be2\u7684\u5546\u54c1\u4ef7\u683c\uff1a\" + productLaoBan.getPrice());\n    }<\/code><\/pre>\n\n\n\n<p>\u4ef7\u683c\u8986\u76d6\uff0c\u6700\u540e\u7684\u7ed3\u679c\uff1a70<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e50\u89c2\u9501\u5b9e\u73b0\u6d41\u7a0b<\/h2>\n\n\n\n<p>\u6570\u636e\u5e93\u4e2d\u6dfb\u52a0version\u5b57\u6bb5<\/p>\n\n\n\n<p>\u53d6\u51fa\u8bb0\u5f55\u65f6\uff0c\u83b7\u53d6\u5f53\u524dversion<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT id,`name`,price,`version` FROM product WHERE id=1<\/code><\/pre>\n\n\n\n<p>\u66f4\u65b0\u65f6\uff0cversion + 1\uff0c\u5982\u679cwhere\u8bed\u53e5\u4e2d\u7684version\u7248\u672c\u4e0d\u5bf9\uff0c\u5219\u66f4\u65b0\u5931\u8d25<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>UPDATE product SET price=price+50, `version`=`version` + 1 WHERE id=1 AND\n`version`=1<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">Mybatis-Plus\u5b9e\u73b0\u4e50\u89c2\u9501<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">1\u3001\u4fee\u6539\u5b9e\u4f53\u7c7b<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>@Data\npublic class Product {\n\n    private Long id;\n\n    private String name;\n\n    private Integer price;\n\n    @Version \/\/\u6807\u8bc6\u4e50\u89c2\u9501\u7248\u672c\u53f7\u5b57\u6bb5\n    private Integer version;\n\n}<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">2\u3001\u6dfb\u52a0\u4e50\u89c2\u9501\u63d2\u4ef6\u914d\u7f6e<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>@Bean<br>public MybatisPlusInterceptor mybatisPlusInterceptor() {<br>    MybatisPlusInterceptor interceptor = new MybatisPlusInterceptor();<br>    \/\/\u6dfb\u52a0\u5206\u9875\u63d2\u4ef6<br>    interceptor.addInnerInterceptor(new PaginationInnerInterceptor(DbType.<em>MYSQL<\/em>));<br>    \/\/\u6dfb\u52a0\u4e50\u89c2\u9501\u63d2\u4ef6<br>    interceptor.addInnerInterceptor(new OptimisticLockerInnerInterceptor());<br>    return interceptor;<br>}<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">3\u3001\u6d4b\u8bd5\u4fee\u6539\u51b2\u7a81<\/h3>\n\n\n\n<p>\u5c0f\u674e\u67e5\u8be2\u5546\u54c1\u4fe1\u606f\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT id,name,price,version FROM t_product WHERE id=?<\/code><\/pre>\n\n\n\n<p>\u5c0f\u738b\u67e5\u8be2\u5546\u54c1\u4fe1\u606f\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT id,name,price,version FROM t_product WHERE id=?<\/code><\/pre>\n\n\n\n<p>\u5c0f\u674e\u4fee\u6539\u5546\u54c1\u4ef7\u683c\uff0c\u81ea\u52a8\u5c06version+1<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>UPDATE t_product SET name=?, price=?, version=? WHERE id=? AND version=?\nParameters: \u5916\u661f\u4eba\u7b14\u8bb0\u672c(String), 150(Integer), 1(Integer), 1(Long), 0(Integer)<\/code><\/pre>\n\n\n\n<p>\u5c0f\u738b\u4fee\u6539\u5546\u54c1\u4ef7\u683c\uff0c\u6b64\u65f6version\u5df2\u66f4\u65b0\uff0c\u6761\u4ef6\u4e0d\u6210\u7acb\uff0c\u4fee\u6539\u5931\u8d25<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>UPDATE t_product SET name=?, price=?, version=? WHERE id=? AND version=?\nParameters: \u5916\u661f\u4eba\u7b14\u8bb0\u672c(String), 70(Integer), 1(Integer), 1(Long), 0(Integer)<\/code><\/pre>\n\n\n\n<p>\u6700\u7ec8\uff0c\u5c0f\u738b\u4fee\u6539\u5931\u8d25\uff0c\u67e5\u8be2\u4ef7\u683c\uff1a150<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT id,name,price,version FROM t_product WHERE id=?<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">4\u3001\u4f18\u5316\u6d41\u7a0b<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>    @Test\n    public void testProduct01() {\n        \/\/\u5c0f\u674e\u67e5\u8be2\u5546\u54c1\u4ef7\u683c\n        Product productLi = productMapper.selectById(1);\n        System.out.println(\"\u5c0f\u674e\u67e5\u8be2\u7684\u5546\u54c1\u4ef7\u683c\uff1a\" + productLi.getPrice());\n        \/\/\u5c0f\u738b\u67e5\u8be2\u5546\u54c1\u4ef7\u683c\n        Product productWang = productMapper.selectById(1);\n        System.out.println(\"\u5c0f\u738b\u67e5\u8be2\u7684\u5546\u54c1\u4ef7\u683c\uff1a\" + productWang.getPrice());\n        \/\/\u5c0f\u674e\u5c06\u5546\u54c1\u4ef7\u683c+50\n        productLi.setPrice(productLi.getPrice() + 50);\n        productMapper.updateById(productLi);\n        \/\/\u5c0f\u738b\u5c06\u5546\u54c1\u4ef7\u683c-30\n        productWang.setPrice(productLi.getPrice() - 30);\n        int result = productMapper.updateById(productWang);\n        if (result == 0) {\n            \/\/\u64cd\u4f5c\u5931\u8d25\uff0c\u91cd\u8bd5\n            Product productNew = productMapper.selectById(1);\n            productNew.setPrice(productNew.getPrice() - 30);\n            productMapper.updateById(productNew);\n        }\n        \/\/\u8001\u677f\u67e5\u8be2\u5546\u54c1\u4ef7\u683c\n        Product productLaoBan = productMapper.selectById(1);\n        System.out.println(\"\u8001\u677f\u67e5\u8be2\u7684\u5546\u54c1\u4ef7\u683c\uff1a\" + productLaoBan.getPrice());\n    }<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u573a\u666f \u4e00\u4ef6\u5546\u54c1\uff0c\u6210\u672c\u4ef7\u662f80\u5143\uff0c\u552e\u4ef7\u662f100\u5143\u3002\u8001\u677f\u5148\u662f\u901a\u77e5\u5c0f\u674e\uff0c\u8bf4\u4f60\u53bb\u628a\u5546\u54c1\u4ef7\u683c\u589e\u52a050\u5143\u3002\u5c0f\u674e\u6b63\u5728\u73a9\u6e38\u620f\uff0c [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[165],"tags":[183],"class_list":["post-4024","post","type-post","status-publish","format-standard","hentry","category-mybatisplus-","tag-mybatisplus"],"_links":{"self":[{"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts\/4024"}],"collection":[{"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=4024"}],"version-history":[{"count":5,"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts\/4024\/revisions"}],"predecessor-version":[{"id":4029,"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts\/4024\/revisions\/4029"}],"wp:attachment":[{"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=4024"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=4024"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=4024"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}