{"id":3099,"date":"2023-01-02T15:03:14","date_gmt":"2023-01-02T07:03:14","guid":{"rendered":"https:\/\/qaqaq.top\/?p=3099"},"modified":"2023-01-02T15:03:15","modified_gmt":"2023-01-02T07:03:15","slug":"mybatis%e7%9a%84%e5%90%84%e7%a7%8d%e6%9f%a5%e8%af%a2%e5%8a%9f%e8%83%bd","status":"publish","type":"post","link":"https:\/\/qaqaq.top\/?p=3099","title":{"rendered":"MyBatis\u7684\u5404\u79cd\u67e5\u8be2\u529f\u80fd"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">1\u3001\u67e5\u8be2\u4e00\u4e2a\u5b9e\u4f53\u7c7b\u5bf9\u8c61<\/h2>\n\n\n\n<pre class=\"wp-block-code\"><code>    \/**\r\n     * \u6839\u636e\u7528\u6237id\u67e5\u8be2\u7528\u6237\u4fe1\u606f\r\n     * @param id\r\n     * @return\r\n     *\/\r\n    User getUserById(@Param(\"id\") int id);<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>    &lt;!--User getUserById(@Param(\"id\") int id);-->\r\n    &lt;select id=\"getUserById\" resultType=\"User\">\r\n        select * from t_user where id = #{id}\r\n    &lt;\/select><\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">2\u3001\u67e5\u8be2\u4e00\u4e2alist\u96c6\u5408<\/h2>\n\n\n\n<pre class=\"wp-block-code\"><code>    \/**\r\n     * \u67e5\u8be2\u6240\u6709\u7528\u6237\u4fe1\u606f\r\n     * @return\r\n     *\/\r\n    List&lt;User> getUserList();<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>    &lt;!--List&lt;User> getUserList();-->\r\n    &lt;select id=\"getUserList\" resultType=\"User\">\r\n        select * from t_user\r\n    &lt;\/select><\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">3\u3001\u67e5\u8be2\u5355\u4e2a\u6570\u636e<\/h2>\n\n\n\n<pre class=\"wp-block-code\"><code>    \/**\r\n     * \u67e5\u8be2\u7528\u6237\u7684\u603b\u8bb0\u5f55\u6570\r\n     * @return\r\n     * \u5728MyBatis\u4e2d\uff0c\u5bf9\u4e8eJava\u4e2d\u5e38\u7528\u7684\u7c7b\u578b\u90fd\u8bbe\u7f6e\u4e86\u7c7b\u578b\u522b\u540d\r\n     * \u4f8b\u5982\uff1ajava.lang.Integer-->int|integer\r\n     * \u4f8b\u5982\uff1aint-->_int|_integer\r\n     * \u4f8b\u5982\uff1aMap-->map,List-->list\r\n     *\/\r\n    int getCount();<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>    &lt;!--int getCount();-->\r\n    &lt;select id=\"getCount\" resultType=\"_integer\">\r\n        select count(id) from t_user\r\n    &lt;\/select><\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">4\u3001\u67e5\u8be2\u4e00\u6761\u6570\u636e\u4e3amap\u96c6\u5408<\/h2>\n\n\n\n<pre class=\"wp-block-code\"><code>    \/**\r\n     * \u6839\u636e\u7528\u6237id\u67e5\u8be2\u7528\u6237\u4fe1\u606f\u4e3amap\u96c6\u5408\r\n     * @param id\r\n     * @return\r\n     *\/\r\n    Map&lt;String, Object> getUserToMap(@Param(\"id\") int id);<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>    &lt;!--Map&lt;String, Object> getUserToMap(@Param(\"id\") int id);-->\r\n    &lt;select id=\"getUserToMap\" resultType=\"map\">\r\n        select * from t_user where id = #{id}\r\n    &lt;\/select>\r\n    &lt;!--\u7ed3\u679c\uff1a{password=123456, sex=\u7537, id=1, age=23, username=admin}--><\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">5\u3001\u67e5\u8be2\u591a\u6761\u6570\u636e\u4e3amap\u96c6\u5408<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">\u65b9\u5f0f\u4e00\uff1a<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>    \/**\r\n     * \u67e5\u8be2\u6240\u6709\u7528\u6237\u4fe1\u606f\u4e3amap\u96c6\u5408\r\n     * @return\r\n     * \u5c06\u8868\u4e2d\u7684\u6570\u636e\u4ee5map\u96c6\u5408\u7684\u65b9\u5f0f\u67e5\u8be2\uff0c\u4e00\u6761\u6570\u636e\u5bf9\u5e94\u4e00\u4e2amap\uff1b\u82e5\u6709\u591a\u6761\u6570\u636e\uff0c\u5c31\u4f1a\u4ea7\u751f\u591a\u4e2amap\u96c6\u5408\uff0c\u6b64\u65f6\u53ef\u4ee5\u5c06\u8fd9\u4e9bmap\u653e\u5728\u4e00\u4e2alist\u96c6\u5408\u4e2d\u83b7\u53d6\r\n     *\/\r\n    List&lt;Map&lt;String, Object>> getAllUserToMap();<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>    &lt;!--Map&lt;String, Object> getAllUserToMap();-->\r\n    &lt;select id=\"getAllUserToMap\" resultType=\"map\">\r\n        select * from t_user\r\n    &lt;\/select><\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\u65b9\u5f0f\u4e8c\uff1a<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>    \/**\r\n     * \u67e5\u8be2\u6240\u6709\u7528\u6237\u4fe1\u606f\u4e3amap\u96c6\u5408\r\n     * @return\r\n     * \u5c06\u8868\u4e2d\u7684\u6570\u636e\u4ee5map\u96c6\u5408\u7684\u65b9\u5f0f\u67e5\u8be2\uff0c\u4e00\u6761\u6570\u636e\u5bf9\u5e94\u4e00\u4e2amap\uff1b\u82e5\u6709\u591a\u6761\u6570\u636e\uff0c\u5c31\u4f1a\u4ea7\u751f\u591a\u4e2amap\u96c6\u5408\uff0c\u5e76\u4e14\u6700\u7ec8\u8981\u4ee5\u4e00\u4e2amap\u7684\u65b9\u5f0f\u8fd4\u56de\u6570\u636e\uff0c\u6b64\u65f6\u9700\u8981\u901a\u8fc7@MapKey\u6ce8\u89e3\u8bbe\u7f6emap\u96c6\u5408\u7684\u952e\uff0c\u503c\u662f\u6bcf\u6761\u6570\u636e\u6240\u5bf9\u5e94\u7684map\u96c6\u5408\r\n     *\/\r\n    @MapKey(\"id\")\r\n    Map&lt;String, Object> getAllUserToMap();<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>    &lt;!--Map&lt;String, Object> getAllUserToMap();-->\r\n    &lt;select id=\"getAllUserToMap\" resultType=\"map\">\r\n        select * from t_user\r\n    &lt;\/select>\r\n    \u7ed3\u679c\uff1a\r\n    &lt;!--\r\n    {\r\n    1={password=123456, sex=\u7537, id=1, age=23, username=admin},\r\n    2={password=123456, sex=\u7537, id=2, age=23, username=\u5f20\u4e09},\r\n    3={password=123456, sex=\u7537, id=3, age=23, username=\u5f20\u4e09}\r\n    }\r\n    --><\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>1\u3001\u67e5\u8be2\u4e00\u4e2a\u5b9e\u4f53\u7c7b\u5bf9\u8c61 2\u3001\u67e5\u8be2\u4e00\u4e2alist\u96c6\u5408 3\u3001\u67e5\u8be2\u5355\u4e2a\u6570\u636e 4\u3001\u67e5\u8be2\u4e00\u6761\u6570\u636e\u4e3amap\u96c6\u5408 5\u3001\u67e5\u8be2\u591a\u6761 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