MyBatis注解之存储过程

矫情吗；* 2021-07-25 02:05 353阅读 0赞

**一 领域模型**

package org.fkit.domain;
    import java.io.Serializable;
    /**
    *
    * CREATE TABLE `tb_user` (
      `id` INT(11) NOT NULL AUTO_INCREMENT,
      `name` VARCHAR(18) DEFAULT NULL,
      `sex` CHAR(2) DEFAULT NULL,
      `age` INT(11) DEFAULT NULL,
      PRIMARY KEY  (`id`)
    )
    */
    public class User implements Serializable{
         
         private static final long serialVersionUID = 1L;
         
         private Integer id;
         private String name;
         private String sex;
         private Integer age;
         
         public User() {
               super();
               // TODO Auto-generated constructor stub
         }
         
         public User( String name, String sex, Integer age) {
               super();
               this.name = name;
               this.sex = sex;
               this.age = age;
         }
         public Integer getId() {
               return id;
         }
         public void setId(Integer id) {
               this.id = id;
         }
         public String getName() {
               return name;
         }
         public void setName(String name) {
               this.name = name;
         }
         public String getSex() {
               return sex;
         }
         public void setSex(String sex) {
               this.sex = sex;
         }
         public Integer getAge() {
               return age;
         }
         public void setAge(Integer age) {
               this.age = age;
         }
         @Override
         public String toString() {
               return "User [id=" + id + ", name=" + name + ", sex="  + sex + ", age="
                         + age + "]";
         }
    }

**二 会话工厂**

package org.fkit.factory;
    
    import java.io.InputStream;
    
    import org.apache.ibatis.io.Resources;
    import org.apache.ibatis.session.SqlSession;
    import org.apache.ibatis.session.SqlSessionFactory;
    import org.apache.ibatis.session.SqlSessionFactoryBuilder;
    
    public class FKSqlSessionFactory {
        
        private static SqlSessionFactory sqlSessionFactory = null;
        
        // 初始化创建SqlSessionFactory对象
        static{
            try (// 读取mybatis-config.xml文件
                    InputStream is = Resources.getResourceAsStream("mybatis-config.xml");
                ){
                sqlSessionFactory = new SqlSessionFactoryBuilder()
                        .build(is);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
        
        // 获取SqlSession对象的静态方法
        public static SqlSession getSqlSession(){
            return sqlSessionFactory.openSession();
        }
    
        // 获取SqlSessionFactory的静态方法
        public static SqlSessionFactory getSqlSessionFactory() {
            return sqlSessionFactory;
        }
    
    }

**三 mapper**

package org.fkit.mapper;
    
    import java.util.List;
    
    import org.apache.ibatis.annotations.Delete;
    import org.apache.ibatis.annotations.Insert;
    import org.apache.ibatis.annotations.Options;
    import org.apache.ibatis.annotations.Select;
    import org.apache.ibatis.annotations.Update;
    import org.apache.ibatis.mapping.StatementType;
    import org.fkit.domain.User;
    public interface UserMapper {
    
        /**
         * 插入数据
         * @param user 包含要查询的User信息
         */
        @Insert("{call insert_user(#{id,mode=OUT,jdbcType=INTEGER},"
                + "#{name,mode=IN},#{sex,mode=IN},#{age,mode=IN})}")
        @Options(statementType=StatementType.CALLABLE)
        void saveUser(User user);
        
        /**
         * 查询所有数据
         * @return List<User> 包含所有User数据的List集合
         */
        @Select("{call select_user()}")
        @Options(statementType=StatementType.CALLABLE)
        List<User> selectUser();
        
        /**
         * 根据id查询对应的数据
         * @param id 用户的id
         * @return User 包含用户信息的User对象
         */
        @Select("{call select_user_by_id(#{id,mode=IN})}")
        @Options(statementType=StatementType.CALLABLE)
        User selectUserById(Integer id);
        
        /**
         * 修改数据
         * @param user 包含要修改的User信息
         */
        @Update("{call update_user(#{id,mode=IN},#{name,mode=IN},#{sex,mode=IN},#{age,mode=IN})}")
        @Options(statementType=StatementType.CALLABLE)
        void modifyUser(User user);
        
        /**
         * 删除数据
         * @param user 包含要修改的User信息
         */
        @Delete("{call delete_user_by_id(#{id,mode=IN})}")
        @Options(statementType=StatementType.CALLABLE)
        void removeUser(User user);
    }

**四 配置文件**

1 db.properties

driver=com.mysql.jdbc.Driver
    url=jdbc:mysql://127.0.0.1:3306/mybatis
    username=root
    password=123456

2 log4j.xml

<?xml version="1.0" encoding="UTF-8"?>
    <!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">  
    <log4j:configuration  xmlns:log4j="http://jakarta.apache.org/log4j/">  
        <appender name="STDOUT"  class="org.apache.log4j.ConsoleAppender">  
            <layout class="org.apache.log4j.PatternLayout">  
                <param name="ConversionPattern" value="%5p [%t] %m%n"  />  
            </layout>  
        </appender>   
         <logger name="org.fkit.mapper">  
            <level value="DEBUG" />  
        </logger>
        <root>  
            <level value="ERROR" />  
            <appender-ref ref="STDOUT" />  
        </root>  
    </log4j:configuration>

3 mybatis-config.xml

<?xml version="1.0" encoding="UTF-8" ?>
    <!DOCTYPE configuration
      PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
      "http://mybatis.org/dtd/mybatis-3-config.dtd">
      
    <configuration>
         <properties resource="db.properties"/>
         
         <settings>
               <setting name="logImpl" value="LOG4J"/>
               
               <setting name="lazyLoadingEnabled" value="true"/>
               <setting name="aggressiveLazyLoading" value="false"/>
         </settings>
         <environments default="mysql">
         
        <environment id="mysql">
        
          <transactionManager type="JDBC"/>
          
           <dataSource type="POOLED">
            <property name="driver" value="${driver}"/>
            <property name="url" value="${url}"/>
            <property name="username" value="${username}"/>
            <property name="password" value="${password}"/>
          </dataSource>
        </environment>
      </environments>
      
      <mappers>
          <mapper class="org.fkit.mapper.UserMapper"/>
      </mappers>
    </configuration>

**五 测试**

package org.fkit.test;
    
    import java.util.List;
    import org.apache.ibatis.session.SqlSession;
    import org.fkit.domain.User;
    import org.fkit.factory.FKSqlSessionFactory;
    import org.fkit.mapper.UserMapper;
    
    
    public class AProcedureTest {
    
        public static void main(String[] args) {
            // 定义SqlSession变量
            SqlSession sqlSession = null;
            try {
                // 创建SqlSession实例
                sqlSession = FKSqlSessionFactory.getSqlSession();
                AProcedureTest t = new AProcedureTest();
                // 测试插入数据
    //            t.testSaveUser(sqlSession);
                // 测试查询所有数据
    //            t.testSelectUser(sqlSession);
                // 测试根据id查询对应的数据
    //            t.testSelectUserById(sqlSession);
                // 测试修改数据
    //            t.testModifyUser(sqlSession);
                // 测试删除数据
                t.testRemoveUser(sqlSession);
                // 提交事务
                sqlSession.commit();
            } catch (Exception e) {
                // 回滚事务
                sqlSession.rollback();
                e.printStackTrace();
            }finally {
                // 关闭SqlSession
                if(sqlSession != null)
                    sqlSession.close();
            }
        }
        
        // 测试插入数据
        public void testSaveUser(SqlSession sqlSession){
            // 获得UserMapper接口的代理对象
            UserMapper um = sqlSession.getMapper(UserMapper.class);
            User user = new User("test","男",23);
    //        User user = new User("jack","男",20);
    //        User user = new User("rose","女",18);
    //        User user = new User("tom","男",21);
    //        User user = new User("mary","女",19);
    //        User user = new User("alice","女",18);
    //        User user = new User("scott","男",25);
            // 调用保存User的方法
            um.saveUser(user);
            System.out.println("插入成功，返回的id = " + user.getId());
        }
        
        // 测试查询所有数据
        public void testSelectUser(SqlSession sqlSession){
            // 获得UserMapper接口的代理对象
            UserMapper um = sqlSession.getMapper(UserMapper.class);
            // 调用查询所有User数据的方法
            List<User> users = um.selectUser();
            // 遍历打印每一个User对象
            users.forEach(user -> System.out.println(user));
        }
        
        // 测试根据id查询对应的数据
        public void testSelectUserById(SqlSession sqlSession){
            // 获得UserMapper接口的代理对象
            UserMapper um = sqlSession.getMapper(UserMapper.class);
            // 调用根据id查询User数据的方法
            User user = um.selectUserById(1);
            System.out.println(user);
        }
        
        // 测试修改数据
        public void testModifyUser(SqlSession sqlSession){
            // 获得UserMapper接口的代理对象
            UserMapper um = sqlSession.getMapper(UserMapper.class);
            // 查询出id为1的User对象
            User user = um.selectUserById(1);
            // 修改对象的属性
            user.setName("fkit");
            user.setSex("男");
            user.setAge(19);
            // 调用修改数据的方法
            um.modifyUser(user);
        }
        
        // 测试删除数据
        public void testRemoveUser(SqlSession sqlSession){
            // 获得UserMapper接口的代理对象
            UserMapper um = sqlSession.getMapper(UserMapper.class);
            // 查询出id为1的User对象
            User user = um.selectUserById(1);
            // 调用删除数据的方法
            um.removeUser(user);
        }
    }

**六 测试效果**

1 testSaveUser

DEBUG [main] ==>  Preparing: {call insert_user(?,?,?,?)}
    DEBUG [main] ==> Parameters: jonh(String), 男(String),  23(Integer)
    DEBUG [main] <==    Updates: 1
    插入成功，返回的id = 1

2 testSelectUser

DEBUG [main] ==>  Preparing: {call select_user()}
    DEBUG [main] ==> Parameters:
    DEBUG [main] <==      Total: 1
    DEBUG [main] <==    Updates: 0
    User [id=1, name=jonh, sex=男, age=23]

3 testSelectUserById

DEBUG [main] ==>  Preparing: {call select_user_by_id(?)}
    DEBUG [main] ==> Parameters: 1(Integer)
    DEBUG [main] <==      Total: 1
    DEBUG [main] <==    Updates: 0
    User [id=1, name=jonh, sex=男, age=23]

4 testModifyUser

DEBUG [main] ==>  Preparing: {call select_user_by_id(?)}
    DEBUG [main] ==> Parameters: 1(Integer)
    DEBUG [main] <==      Total: 1
    DEBUG [main] <==    Updates: 0
    DEBUG [main] ==>  Preparing: {call update_user(?,?,?,?)}
    DEBUG [main] ==> Parameters: 1(Integer), fkit(String), 男(String), 19(Integer)
    DEBUG [main] <==    Updates: 1

5 testRemoveUser

DEBUG [main] ==> Parameters: 1(Integer)
    DEBUG [main] <==      Total: 1
    DEBUG [main] <==    Updates: 0
    DEBUG [main] ==>  Preparing: {call delete_user_by_id(?)}
    DEBUG [main] ==> Parameters: 1(Integer)
    DEBUG [main] <==    Updates: 1