{"id":15937,"date":"2026-04-26T15:27:10","date_gmt":"2026-04-26T07:27:10","guid":{"rendered":"https:\/\/top.duoku.icu\/libs\/15937.html"},"modified":"2026-04-26T15:27:10","modified_gmt":"2026-04-26T07:27:10","slug":"mybatis-%e8%af%a6%e7%bb%86%e4%bd%bf%e7%94%a8%e6%95%99%e7%a8%8b","status":"publish","type":"post","link":"https:\/\/www.srclibs.com\/index.php\/2026\/04\/26\/mybatis-%e8%af%a6%e7%bb%86%e4%bd%bf%e7%94%a8%e6%95%99%e7%a8%8b\/","title":{"rendered":"MyBatis \u8be6\u7ec6\u4f7f\u7528\u6559\u7a0b"},"content":{"rendered":"<div style=\"text-align:center;margin:30px 0;\"><img decoding=\"async\" src=\"https:\/\/top.duoku.icu\/wp-content\/uploads\/2026\/04\/image-96.png\" alt=\"MyBatis \u8be6\u7ec6\u4f7f\u7528\u6559\u7a0b\" style=\"max-width:100%;height:auto;border-radius:12px;box-shadow:0 4px 12px rgba(0,0,0,0.1);\"><\/div>\n<h1>MyBatis \u8be6\u7ec6\u4f7f\u7528\u6559\u7a0b<\/h1>\n<h2>\u4e00\u3001MyBatis \u7b80\u4ecb<\/h2>\n<p>MyBatis \u662f\u4e00\u6b3e\u4f18\u79c0\u7684\u6301\u4e45\u5c42\u6846\u67b6\uff0c\u5b83\u652f\u6301\u81ea\u5b9a\u4e49 SQL\u3001\u5b58\u50a8\u8fc7\u7a0b\u4ee5\u53ca\u9ad8\u7ea7\u6620\u5c04\u3002MyBatis \u514d\u9664\u4e86\u51e0\u4e4e\u6240\u6709\u7684 JDBC \u4ee3\u7801\u4ee5\u53ca\u8bbe\u7f6e\u53c2\u6570\u548c\u83b7\u53d6\u7ed3\u679c\u96c6\u7684\u5de5\u4f5c\u3002MyBatis \u53ef\u4ee5\u901a\u8fc7\u7b80\u5355\u7684 XML \u6216\u6ce8\u89e3\u4e3a\u914d\u7f6e\u548c\u539f\u59cb\u6620\u5c04\uff0c\u5c06 SQL \u8bed\u53e5\u4e0e Java \u5bf9\u8c61\u8fdb\u884c\u7ed1\u5b9a\u3002<\/p>\n<p><strong>\u6838\u5fc3\u4f18\u52bf\uff1a<\/strong><\/p>\n<ul>\n<li>\u7b80\u5316\u6570\u636e\u5e93\u64cd\u4f5c\uff1a\u51cf\u5c11\u4e86 80% \u7684\u4ee3\u7801\u91cf<\/li>\n<li>\u7075\u6d3b\u7684 SQL \u63a7\u5236\uff1a\u53ef\u4ee5\u76f4\u63a5\u7f16\u5199\u548c\u4f18\u5316 SQL \u8bed\u53e5<\/li>\n<li>\u652f\u6301\u52a8\u6001 SQL\uff1a\u80fd\u591f\u6839\u636e\u6761\u4ef6\u52a8\u6001\u751f\u6210 SQL<\/li>\n<li>\u5f3a\u5927\u7684\u6620\u5c04\u80fd\u529b\uff1a\u652f\u6301\u590d\u6742\u7684\u5bf9\u8c61\u5173\u7cfb\u6620\u5c04<\/li>\n<li>\u6613\u4e8e\u5b66\u4e60\u548c\u4f7f\u7528\uff1a\u5b66\u4e60\u66f2\u7ebf\u5e73\u7f13<\/li>\n<\/ul>\n<h2>\u4e8c\u3001\u5feb\u901f\u5f00\u59cb<\/h2>\n<h3>1. \u6dfb\u52a0\u4f9d\u8d56<\/h3>\n<p>\u5728 `pom.xml` \u4e2d\u6dfb\u52a0 MyBatis \u4f9d\u8d56\uff1a<\/p>\n<p>&#8220;`xml<br \/>\n<dependency><br \/>\n    <groupId>org.mybatis.spring.boot<\/groupId><br \/>\n    <artifactId>mybatis-spring-boot-starter<\/artifactId><br \/>\n    <version>3.0.3<\/version><br \/>\n<\/dependency><br \/>\n<dependency><br \/>\n    <groupId>mysql<\/groupId><br \/>\n    <artifactId>mysql-connector-java<\/artifactId><br \/>\n    <version>8.0.33<\/version><br \/>\n<\/dependency><\/p>\n<pre><code>\n<h3>2. \u914d\u7f6e\u6587\u4ef6<\/h3>\n\n<\/code><\/pre>\n<p>yaml<\/p>\n<h1>application.yml<\/h1>\n<p>spring:<br \/>\n  datasource:<br \/>\n    url: jdbc:mysql:\/\/localhost:3306\/test?useSSL=false&#038;characterEncoding=utf-8&#038;serverTimezone=UTC<br \/>\n    username: root<br \/>\n    password: 123456<br \/>\n    driver-class-name: com.mysql.cj.jdbc.Driver<\/p>\n<p>mybatis:<br \/>\n  mapper-locations: classpath:mapper\/*.xml<br \/>\n  type-aliases-package: com.example.project.entity<br \/>\n  configuration:<br \/>\n    map-underscore-to-camel-case: true<br \/>\n    log-impl: org.apache.ibatis.logging.slf4j.Slf4jImpl<\/p>\n<pre><code>\n<h3>3. \u521b\u5efa\u5b9e\u4f53\u7c7b<\/h3>\n\n<\/code><\/pre>\n<p>java<br \/>\npublic class User {<br \/>\n    private Long id;<br \/>\n    private String name;<br \/>\n    private Integer age;<br \/>\n    private String email;<br \/>\n    private Date createTime;<\/p>\n<p>    \/\/ Getter and Setter methods<br \/>\n    public Long getId() { return id; }<br \/>\n    public void setId(Long id) { this.id = id; }<\/p>\n<p>    public String getName() { return name; }<br \/>\n    public void setName(String name) { this.name = name; }<\/p>\n<p>    public Integer getAge() { return age; }<br \/>\n    public void setAge(Integer age) { this.age = age; }<\/p>\n<p>    public String getEmail() { return email; }<br \/>\n    public void setEmail(String email) { this.email = email; }<\/p>\n<p>    public Date getCreateTime() { return createTime; }<br \/>\n    public void setCreateTime(Date createTime) { this.createTime = createTime; }<br \/>\n}<\/p>\n<pre><code>\n<h3>4. \u521b\u5efa Mapper \u63a5\u53e3<\/h3>\n\n<\/code><\/pre>\n<p>java<br \/>\npublic interface UserMapper {<br \/>\n    \/\/ \u57fa\u7840 CRUD \u65b9\u6cd5<br \/>\n    int insert(User user);<br \/>\n    int deleteById(Long id);<br \/>\n    int updateById(User user);<br \/>\n    User selectById(Long id);<\/p>\n<p>    \/\/ \u81ea\u5b9a\u4e49\u67e5\u8be2<br \/>\n    List<User> selectAll();<br \/>\n    List<User> selectByName(String name);<br \/>\n}<\/p>\n<pre><code>\n<h3>5. \u521b\u5efa XML \u6620\u5c04\u6587\u4ef6<\/h3>\n\n<\/code><\/pre>\n<p>xml<br \/>\n<?xml version=\"1.0\" encoding=\"UTF-8\"?><br \/>\n<!DOCTYPE mapper PUBLIC \"-\/\/mybatis.org\/\/DTD Mapper 3.0\/\/EN\" \n    \"http:\/\/mybatis.org\/dtd\/mybatis-3-mapper.dtd\"><br \/>\n<mapper namespace=\"com.example.project.mapper.UserMapper\">\n<p>    <!-- \u7ed3\u679c\u6620\u5c04 --><br \/>\n    <resultMap id=\"BaseResultMap\" type=\"com.example.project.entity.User\"><br \/>\n        <id column=\"id\" property=\"id\" jdbcType=\"BIGINT\"\/><br \/>\n        <result column=\"name\" property=\"name\" jdbcType=\"VARCHAR\"\/><br \/>\n        <result column=\"age\" property=\"age\" jdbcType=\"INTEGER\"\/><br \/>\n        <result column=\"email\" property=\"email\" jdbcType=\"VARCHAR\"\/><br \/>\n        <result column=\"create_time\" property=\"createTime\" jdbcType=\"TIMESTAMP\"\/><br \/>\n    <\/resultMap><\/p>\n<p>    <!-- \u901a\u7528\u5217\u6620\u5c04 --><br \/>\n    <sql id=\"Base_Column_List\"><br \/>\n        id, name, age, email, create_time<br \/>\n    <\/sql><\/p>\n<p>    <!-- \u63d2\u5165 --><br \/>\n    <insert id=\"insert\" parameterType=\"com.example.project.entity.User\" useGeneratedKeys=\"true\" keyProperty=\"id\"><br \/>\n        INSERT INTO user (name, age, email, create_time)<br \/>\n        VALUES (#{name}, #{age}, #{email}, #{createTime})<br \/>\n    <\/insert><\/p>\n<p>    <!-- \u5220\u9664 --><br \/>\n    <delete id=\"deleteById\" parameterType=\"java.lang.Long\"><br \/>\n        DELETE FROM user WHERE id = #{id}<br \/>\n    <\/delete><\/p>\n<p>    <!-- \u66f4\u65b0 --><br \/>\n    <update id=\"updateById\" parameterType=\"com.example.project.entity.User\"><br \/>\n        UPDATE user<br \/>\n        <set><br \/>\n            <if test=\"name != null\">name = #{name},<\/if><br \/>\n            <if test=\"age != null\">age = #{age},<\/if><br \/>\n            <if test=\"email != null\">email = #{email},<\/if><br \/>\n        <\/set><br \/>\n        WHERE id = #{id}<br \/>\n    <\/update><\/p>\n<p>    <!-- \u67e5\u8be2\u5355\u4e2a --><br \/>\n    <select id=\"selectById\" resultMap=\"BaseResultMap\"><br \/>\n        SELECT <include refid=\"Base_Column_List\"\/><br \/>\n        FROM user<br \/>\n        WHERE id = #{id}<br \/>\n    <\/select><\/p>\n<p>    <!-- \u67e5\u8be2\u5168\u90e8 --><br \/>\n    <select id=\"selectAll\" resultMap=\"BaseResultMap\"><br \/>\n        SELECT <include refid=\"Base_Column_List\"\/><br \/>\n        FROM user<br \/>\n        ORDER BY create_time DESC<br \/>\n    <\/select><\/p>\n<p>    <!-- \u6309\u540d\u79f0\u67e5\u8be2 --><br \/>\n    <select id=\"selectByName\" resultMap=\"BaseResultMap\"><br \/>\n        SELECT <include refid=\"Base_Column_List\"\/><br \/>\n        FROM user<br \/>\n        WHERE name LIKE CONCAT(&#8216;%&#8217;, #{name}, &#8216;%&#8217;)<br \/>\n    <\/select><\/p>\n<\/mapper>\n<pre><code>\n<h2>\u4e09\u3001\u6838\u5fc3\u529f\u80fd\u8be6\u89e3<\/h2>\n\n<h3>1. CRUD \u64cd\u4f5c<\/h3>\n\nMyBatis \u63d0\u4f9b\u4e86\u5b8c\u6574\u7684\u589e\u5220\u6539\u67e5\u529f\u80fd\uff1a\n\n<strong>\u63d2\u5165\u64cd\u4f5c\uff1a<\/strong>\n<\/code><\/pre>\n<p>java<br \/>\n@Service<br \/>\npublic class UserService {<br \/>\n    @Autowired<br \/>\n    private UserMapper userMapper;<\/p>\n<p>    public void addUser(User user) {<br \/>\n        int rows = userMapper.insert(user);<br \/>\n        System.out.println(&#8220;\u63d2\u5165\u6210\u529f\uff0c\u5f71\u54cd\u884c\u6570\uff1a&#8221; + rows);<br \/>\n        System.out.println(&#8220;\u751f\u6210\u7684 ID: &#8221; + user.getId());<br \/>\n    }<br \/>\n}<\/p>\n<pre><code>\n<strong>\u67e5\u8be2\u64cd\u4f5c\uff1a<\/strong>\n<\/code><\/pre>\n<p>java<br \/>\n\/\/ \u6839\u636e ID \u67e5\u8be2<br \/>\npublic User getUserById(Long id) {<br \/>\n    return userMapper.selectById(id);<br \/>\n}<\/p>\n<p>\/\/ \u67e5\u8be2\u6240\u6709\u7528\u6237<br \/>\npublic List<User> getAllUsers() {<br \/>\n    return userMapper.selectAll();<br \/>\n}<\/p>\n<p>\/\/ \u6279\u91cf\u67e5\u8be2<br \/>\npublic List<User> getUsersByIds(List<Long> ids) {<br \/>\n    return userMapper.selectByIds(ids);<br \/>\n}<\/p>\n<pre><code>\n<strong>\u66f4\u65b0\u64cd\u4f5c\uff1a<\/strong>\n<\/code><\/pre>\n<p>java<br \/>\n\/\/ \u66f4\u65b0\u7528\u6237\u4fe1\u606f<br \/>\npublic void updateUser(User user) {<br \/>\n    int rows = userMapper.updateById(user);<br \/>\n    System.out.println(&#8220;\u66f4\u65b0\u6210\u529f\uff0c\u5f71\u54cd\u884c\u6570\uff1a&#8221; + rows);<br \/>\n}<\/p>\n<p>\/\/ \u90e8\u5206\u5b57\u6bb5\u66f4\u65b0<br \/>\npublic void updateUserPartially(Long id, String name, Integer age) {<br \/>\n    User user = new User();<br \/>\n    user.setId(id);<br \/>\n    user.setName(name);<br \/>\n    user.setAge(age);<br \/>\n    userMapper.updateById(user);<br \/>\n}<\/p>\n<pre><code>\n<strong>\u5220\u9664\u64cd\u4f5c\uff1a<\/strong>\n<\/code><\/pre>\n<p>java<br \/>\n\/\/ \u903b\u8f91\u5220\u9664<br \/>\npublic void deleteUser(Long id) {<br \/>\n    int rows = userMapper.deleteById(id);<br \/>\n    System.out.println(&#8220;\u5220\u9664\u6210\u529f\uff0c\u5f71\u54cd\u884c\u6570\uff1a&#8221; + rows);<br \/>\n}<\/p>\n<pre><code>\n<h3>2. \u52a8\u6001 SQL<\/h3>\n\n\u52a8\u6001 SQL \u53ef\u4ee5\u6839\u636e\u6761\u4ef6\u7075\u6d3b\u6784\u5efa\u67e5\u8be2\u8bed\u53e5\uff1a\n\n<\/code><\/pre>\n<p>xml<br \/>\n<select id=\"selectUsers\" resultMap=\"BaseResultMap\"><br \/>\n    SELECT <include refid=\"Base_Column_List\"\/><br \/>\n    FROM user<br \/>\n    <where><br \/>\n        <if test=\"name != null and name != ''\"><br \/>\n            AND name LIKE CONCAT(&#8216;%&#8217;, #{name}, &#8216;%&#8217;)<br \/>\n        <\/if><br \/>\n        <if test=\"minAge != null\"><br \/>\n            AND age &gt;= #{minAge}<br \/>\n        <\/if><br \/>\n        <if test=\"maxAge != null\"><br \/>\n            AND age &lt;= #{maxAge}<br \/>\n        <\/if><br \/>\n        <if test=\"email != null and email != ''\"><br \/>\n            AND email = #{email}<br \/>\n        <\/if><br \/>\n        <if test=\"status != null\"><br \/>\n            AND status = #{status}<br \/>\n        <\/if><br \/>\n    <\/where><br \/>\n    <if test=\"orderBy != null\"><br \/>\n        ORDER BY ${orderBy}<br \/>\n    <\/if><br \/>\n    <if test=\"limit != null\"><br \/>\n        LIMIT #{limit}<br \/>\n    <\/if><br \/>\n<\/select><\/p>\n<pre><code>\n<strong>\u5176\u4ed6\u52a8\u6001 SQL \u6807\u7b7e\uff1a<\/strong>\n\n<\/code><\/pre>\n<p>xml<br \/>\n<!-- trim \u6807\u7b7e --><br \/>\n<trim prefix=\"SET\" suffixOverrides=\",\">\n    <if test=\"name != null\">name = #{name},<\/if><br \/>\n    <if test=\"age != null\">age = #{age},<\/if><br \/>\n<\/trim>\n<p><!-- foreach \u6807\u7b7e --><br \/>\n<insert id=\"batchInsert\"><br \/>\n    INSERT INTO user (name, age, email)<br \/>\n    VALUES<br \/>\n    <foreach collection=\"list\" item=\"user\" separator=\",\"><br \/>\n        (#{user.name}, #{user.age}, #{user.email})<br \/>\n    <\/foreach><br \/>\n<\/insert><\/p>\n<p><delete id=\"deleteByIds\"><br \/>\n    DELETE FROM user<br \/>\n    WHERE id IN<br \/>\n    <foreach collection=\"ids\" item=\"id\" open=\"(\" separator=\",\" close=\")\"><br \/>\n        #{id}<br \/>\n    <\/foreach><br \/>\n<\/delete><\/p>\n<p><!-- choose \u6807\u7b7e --><br \/>\n<select id=\"selectByType\"><br \/>\n    SELECT * FROM user<br \/>\n    <where><br \/>\n        <choose><br \/>\n            <when test=\"type == 1\">status = 1<\/when><br \/>\n            <when test=\"type == 2\">status = 2<\/when><br \/>\n            <otherwise>status = 0<\/otherwise><br \/>\n        <\/choose><br \/>\n    <\/where><br \/>\n<\/select><\/p>\n<pre><code>\n<h3>3. \u5173\u8054\u67e5\u8be2<\/h3>\n\nMyBatis \u652f\u6301\u4e00\u5bf9\u4e00\u3001\u4e00\u5bf9\u591a\u3001\u591a\u5bf9\u591a\u5173\u8054\u67e5\u8be2\uff1a\n\n<strong>\u4e00\u5bf9\u4e00\u5173\u8054\uff1a<\/strong>\n\n<\/code><\/pre>\n<p>java<br \/>\npublic class Order {<br \/>\n    private Long id;<br \/>\n    private String orderNo;<br \/>\n    private BigDecimal amount;<br \/>\n    private User user; \/\/ \u5173\u8054\u7684\u7528\u6237<br \/>\n}<\/p>\n<pre><code>\n<\/code><\/pre>\n<p>xml<br \/>\n<resultMap id=\"OrderResultMap\" type=\"com.example.project.entity.Order\"><br \/>\n    <id column=\"order_id\" property=\"id\"\/><br \/>\n    <result column=\"order_no\" property=\"orderNo\"\/><br \/>\n    <result column=\"amount\" property=\"amount\"\/><br \/>\n    <association property=\"user\" javaType=\"com.example.project.entity.User\"><br \/>\n        <id column=\"user_id\" property=\"id\"\/><br \/>\n        <result column=\"user_name\" property=\"name\"\/><br \/>\n        <result column=\"user_age\" property=\"age\"\/><br \/>\n        <result column=\"user_email\" property=\"email\"\/><br \/>\n    <\/association><br \/>\n<\/resultMap><\/p>\n<p><select id=\"selectOrderWithUser\" resultMap=\"OrderResultMap\"><br \/>\n    SELECT<br \/>\n        o.id as order_id,<br \/>\n        o.order_no,<br \/>\n        o.amount,<br \/>\n        u.id as user_id,<br \/>\n        u.name as user_name,<br \/>\n        u.age as user_age,<br \/>\n        u.email as user_email<br \/>\n    FROM `order` o<br \/>\n    LEFT JOIN user u ON o.user_id = u.id<br \/>\n    WHERE o.id = #{orderId}<br \/>\n<\/select><\/p>\n<pre><code>\n<strong>\u4e00\u5bf9\u591a\u5173\u8054\uff1a<\/strong>\n\n<\/code><\/pre>\n<p>java<br \/>\npublic class User {<br \/>\n    private Long id;<br \/>\n    private String name;<br \/>\n    private List<Order> orders; \/\/ \u7528\u6237\u7684\u8ba2\u5355\u5217\u8868<br \/>\n}<\/p>\n<pre><code>\n<\/code><\/pre>\n<p>xml<br \/>\n<resultMap id=\"UserWithOrdersMap\" type=\"com.example.project.entity.User\"><br \/>\n    <id column=\"user_id\" property=\"id\"\/><br \/>\n    <result column=\"user_name\" property=\"name\"\/><br \/>\n    <collection property=\"orders\" ofType=\"com.example.project.entity.Order\">\n        <id column=\"order_id\" property=\"id\"\/><br \/>\n        <result column=\"order_no\" property=\"orderNo\"\/><br \/>\n        <result column=\"amount\" property=\"amount\"\/><br \/>\n    <\/collection>\n<\/resultMap><\/p>\n<p><select id=\"selectUserWithOrders\" resultMap=\"UserWithOrdersMap\"><br \/>\n    SELECT<br \/>\n        u.id as user_id,<br \/>\n        u.name as user_name,<br \/>\n        o.id as order_id,<br \/>\n        o.order_no,<br \/>\n        o.amount<br \/>\n    FROM user u<br \/>\n    LEFT JOIN `order` o ON u.id = o.user_id<br \/>\n    WHERE u.id = #{userId}<br \/>\n<\/select><\/p>\n<pre><code>\n<h3>4. \u6ce8\u89e3\u65b9\u5f0f<\/h3>\n\n\u5bf9\u4e8e\u7b80\u5355\u7684 CRUD \u64cd\u4f5c\uff0c\u53ef\u4ee5\u4f7f\u7528\u6ce8\u89e3\u66ff\u4ee3 XML\uff1a\n\n<\/code><\/pre>\n<p>java<br \/>\n@Mapper<br \/>\npublic interface UserMapper {<\/p>\n<p>    @Select(&#8220;SELECT * FROM user WHERE id = #{id}&#8221;)<br \/>\n    User selectById(Long id);<\/p>\n<p>    @Select(&#8220;SELECT * FROM user&#8221;)<br \/>\n    List<User> selectAll();<\/p>\n<p>    @Insert(&#8220;INSERT INTO user (name, age, email) VALUES (#{name}, #{age}, #{email})&#8221;)<br \/>\n    @Options(useGeneratedKeys = true, keyProperty = &#8220;id&#8221;)<br \/>\n    int insert(User user);<\/p>\n<p>    @Update(&#8220;UPDATE user SET name = #{name}, age = #{age} WHERE id = #{id}&#8221;)<br \/>\n    int update(User user);<\/p>\n<p>    @Delete(&#8220;DELETE FROM user WHERE id = #{id}&#8221;)<br \/>\n    int deleteById(Long id);<\/p>\n<p>    @Select(&#8220;SELECT * FROM user WHERE name LIKE CONCAT(&#8216;%&#8217;, #{name}, &#8216;%&#8217;)&#8221;)<br \/>\n    List<User> selectByName(String name);<br \/>\n}<\/p>\n<pre><code>\n<h2>\u56db\u3001\u6700\u4f73\u5b9e\u8df5<\/h2>\n\n<h3>1. \u9879\u76ee\u7ed3\u6784\u89c4\u8303<\/h3>\n\n<\/code><\/pre>\n<p>com.example.project<br \/>\n\u251c\u2500\u2500 config          \/\/ \u914d\u7f6e\u7c7b<br \/>\n\u251c\u2500\u2500 entity          \/\/ \u5b9e\u4f53\u7c7b<br \/>\n\u251c\u2500\u2500 mapper          \/\/ Mapper \u63a5\u53e3<br \/>\n\u251c\u2500\u2500 mapper\/xml      \/\/ XML \u6620\u5c04\u6587\u4ef6<br \/>\n\u251c\u2500\u2500 service         \/\/ \u670d\u52a1\u5c42<br \/>\n\u251c\u2500\u2500 controller      \/\/ \u63a7\u5236\u5668<br \/>\n\u2514\u2500\u2500 dto             \/\/ \u6570\u636e\u4f20\u8f93\u5bf9\u8c61<\/p>\n<pre><code>\n<h3>2. \u547d\u540d\u89c4\u8303<\/h3>\n\n<ul>\n<li>\u5b9e\u4f53\u7c7b\u4f7f\u7528\u9a7c\u5cf0\u547d\u540d\uff0c\u6570\u636e\u5e93\u5b57\u6bb5\u4f7f\u7528\u4e0b\u5212\u7ebf<\/li>\n<li>Mapper \u63a5\u53e3\u4e0e XML \u6587\u4ef6\u540c\u540d\uff0c\u4f4d\u4e8e\u76f8\u540c\u5305\u8def\u5f84<\/li>\n<li>\u65b9\u6cd5\u540d\u9075\u5faa\u8bed\u4e49\u5316\u539f\u5219<\/li>\n<\/ul>\n\n<h3>3. SQL \u6027\u80fd\u4f18\u5316<\/h3>\n\n<\/code><\/pre>\n<p>xml<br \/>\n<!-- \u907f\u514d SELECT * --><br \/>\n<select id=\"selectById\" resultMap=\"BaseResultMap\"><br \/>\n    SELECT id, name, age, email, create_time<br \/>\n    FROM user<br \/>\n    WHERE id = #{id}<br \/>\n<\/select><\/p>\n<p><!-- \u6dfb\u52a0\u5408\u9002\u7684\u7d22\u5f15 --><br \/>\n<!-- \u5728\u6570\u636e\u5e93\u5c42\u9762\u6dfb\u52a0\u7d22\u5f15 --><br \/>\nCREATE INDEX idx_user_age ON user(age);<br \/>\nCREATE INDEX idx_user_name ON user(name);<\/p>\n<pre><code>\n<h3>4. \u6279\u91cf\u64cd\u4f5c\u4f18\u5316<\/h3>\n\n<\/code><\/pre>\n<p>java<br \/>\n\/\/ \u4f7f\u7528 MyBatis \u6279\u91cf\u63d2\u5165<br \/>\n@Insert(&#8220;INSERT INTO user (name, age, email) VALUES &#8221; +<br \/>\n        &#8220;<foreach collection='list' item='u' separator=','>&#8221; +<br \/>\n        &#8220;(#{u.name}, #{u.age}, #{u.email})&#8221; +<br \/>\n        &#8220;<\/foreach>&#8220;)<br \/>\nint batchInsert(@Param(&#8220;list&#8221;) List<User> users);<\/p>\n<pre><code>\n<h3>5. \u4f7f\u7528\u7f13\u5b58<\/h3>\n\n<\/code><\/pre>\n<p>yaml<br \/>\nmybatis:<br \/>\n  configuration:<br \/>\n    cache-enabled: true<br \/>\n    lazy-loading-enabled: true<br \/>\n    aggressive-lazy-loading: false<\/p>\n<pre><code>\n<\/code><\/pre>\n<p>java<br \/>\n@CacheNamespace<br \/>\npublic interface UserMapper {<br \/>\n}<\/p>\n<pre><code>\n<h2>\u4e94\u3001\u5b9e\u9645\u5e94\u7528\u573a\u666f<\/h2>\n\n<h3>\u573a\u666f 1\uff1a\u590d\u6742\u6761\u4ef6\u67e5\u8be2<\/h3>\n\n\u7528\u6237\u641c\u7d22\u529f\u80fd\uff0c\u652f\u6301\u591a\u6761\u4ef6\u7ec4\u5408\uff1a\n\n<\/code><\/pre>\n<p>java<br \/>\n@SelectProvider(type = UserSqlProvider.class, method = &#8220;searchUsers&#8221;)<br \/>\nList<User> searchUsers(SearchCriteria criteria);<\/p>\n<p>public class UserSqlProvider {<br \/>\n    public String searchUsers(SearchCriteria criteria) {<br \/>\n        return new SQL() {{<br \/>\n            SELECT(&#8220;*&#8221;).FROM(&#8220;user&#8221;);<br \/>\n            WHERE(criteria.getName() != null)<br \/>\n                .AND(&#8220;name LIKE CONCAT(&#8216;%&#8217;, #{criteria.name}, &#8216;%&#8217;)&#8221;);<br \/>\n            WHERE(criteria.getMinAge() != null)<br \/>\n                .AND(&#8220;age >= #{criteria.minAge}&#8221;);<br \/>\n            ORDER BY(create_time DESC);<br \/>\n        }}.toString();<br \/>\n    }<br \/>\n}<\/p>\n<pre><code>\n<h3>\u573a\u666f 2\uff1a\u591a\u8868\u8054\u67e5\u7edf\u8ba1<\/h3>\n\n\u8ba2\u5355\u7edf\u8ba1\u62a5\u8868\uff1a\n\n<\/code><\/pre>\n<p>java<br \/>\npublic interface OrderStatisticsMapper {<br \/>\n    Map<String, Object> getOrderStatistics(@Param(&#8220;startTime&#8221;) Date startTime,<br \/>\n                                           @Param(&#8220;endTime&#8221;) Date endTime);<br \/>\n}<\/p>\n<pre><code>\n<\/code><\/pre>\n<p>xml<br \/>\n<select id=\"getOrderStatistics\" resultType=\"java.util.Map\"><br \/>\n    SELECT<br \/>\n        COUNT(*) as total_count,<br \/>\n        SUM(amount) as total_amount,<br \/>\n        AVG(amount) as avg_amount<br \/>\n    FROM `order`<br \/>\n    WHERE create_time BETWEEN #{startTime} AND #{endTime}<br \/>\n<\/select><br \/>\n&#8220;`<\/p>\n<h2>\u516d\u3001\u603b\u7ed3<\/h2>\n<p>MyBatis \u662f\u4e00\u6b3e\u7075\u6d3b\u5f3a\u5927\u7684\u6301\u4e45\u5c42\u6846\u67b6\uff0c\u901a\u8fc7 XML \u548c\u6ce8\u89e3\u4e24\u79cd\u914d\u7f6e\u65b9\u5f0f\uff0c\u80fd\u591f\u6ee1\u8db3\u4e0d\u540c\u573a\u666f\u7684\u5f00\u53d1\u9700\u6c42\u3002\u638c\u63e1 MyBatis \u7684\u6838\u5fc3\u529f\u80fd\u548c\u6700\u4f73\u5b9e\u8df5\uff0c\u53ef\u4ee5\u663e\u8457\u63d0\u5347\u5f00\u53d1\u6548\u7387\u548c\u4ee3\u7801\u8d28\u91cf\u3002<\/p>\n<p><strong>\u5b66\u4e60\u5efa\u8bae\uff1a<\/strong><\/p>\n<ol>\n<li>\u4ece\u7b80\u5355\u7684 CRUD \u64cd\u4f5c\u5f00\u59cb<\/li>\n<li>\u9010\u6b65\u638c\u63e1\u52a8\u6001 SQL \u7684\u4f7f\u7528<\/li>\n<li>\u6df1\u5165\u7406\u89e3\u5173\u8054\u6620\u5c04<\/li>\n<li>\u4f18\u5316 SQL \u6027\u80fd<\/li>\n<li>\u9075\u5faa\u9879\u76ee\u89c4\u8303\u548c\u6700\u4f73\u5b9e\u8df5<\/li>\n<\/ul>\n<p>MyBatis \u4e0e Spring Boot \u7684\u826f\u597d\u6574\u5408\uff0c\u4f7f\u5176\u6210\u4e3a\u4f01\u4e1a\u7ea7\u5f00\u53d1\u7684\u9996\u9009\u6301\u4e45\u5c42\u6846\u67b6\u4e4b\u4e00\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>MyBatis \u8be6\u7ec6\u4f7f\u7528\u6559\u7a0b \u4e00\u3001MyBatis \u7b80\u4ecb MyBatis \u662f\u4e00\u6b3e\u4f18\u79c0\u7684\u6301\u4e45\u5c42\u6846\u67b6\uff0c\u5b83\u652f\u6301\u81ea\u5b9a\u4e49 &#8230;<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[],"tags":[],"class_list":["post-15937","post","type-post","status-publish","format-standard","hentry"],"_links":{"self":[{"href":"https:\/\/www.srclibs.com\/index.php\/wp-json\/wp\/v2\/posts\/15937","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.srclibs.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.srclibs.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.srclibs.com\/index.php\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.srclibs.com\/index.php\/wp-json\/wp\/v2\/comments?post=15937"}],"version-history":[{"count":0,"href":"https:\/\/www.srclibs.com\/index.php\/wp-json\/wp\/v2\/posts\/15937\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.srclibs.com\/index.php\/wp-json\/wp\/v2\/media?parent=15937"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.srclibs.com\/index.php\/wp-json\/wp\/v2\/categories?post=15937"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.srclibs.com\/index.php\/wp-json\/wp\/v2\/tags?post=15937"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}