Mybatis多參數封裝到一個類中模糊查詢

1.創建QueryValueObject實體類

package com.william.domain;

import org.omg.PortableInterceptor.USER_EXCEPTION;

/**
 * @author ：lijunxuan
 * @date ：Created in 2019/7/12  12:09
 * @description ：
 * @version: 1.0
 */
public class QueryValueObject {
    private User user;
    private Integer  startIndex;
    private Integer  pageSize;

    public User getUser() {
        return user;
    }

    public void setUser(User user) {
        this.user = user;
    }

    public Integer getStartIndex() {
        return startIndex;
    }

    public void setStartIndex(Integer startIndex) {
        this.startIndex = startIndex;
    }

    public Integer getPageSize() {
        return pageSize;
    }

    public void setPageSize(Integer pageSize) {
        this.pageSize = pageSize;
    }
}

2.UserMapper接口

package com.william.dao;

import com.william.domain.QueryValueObject;
import com.william.domain.User;

import java.util.List;

public interface UserMapper {
    /**
     * 封裝到一個類中查詢
     * @param queryValueObject
     * @return
     */
    public List<User> findByCondition(QueryValueObject queryValueObject);

}

3.UserMapper.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.william.dao.UserMapper">
    <!--多參數封裝到一個類中多條件查詢-->
    <select id="findByCondition" parameterType="QueryValueObject" resultType="user">
        select * from user where username like "%"#{user.username}"%" and sex=#{user.sex}
       limit #{startIndex},#{pageSize}
    </select>
</mapper>

4.TestCrud測試類

package com.william;

import com.william.dao.UserMapper;
import com.william.domain.QueryValueObject;
import com.william.domain.User;
import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;
import org.junit.Test;

import javax.annotation.Resource;
import java.io.IOException;
import java.io.InputStream;
import java.util.List;

/**
 * @author ：lijunxuan
 * @date ：Created in 2019/7/12  10:16
 * @description ：
 * @version: 1.0
 */
public class TestCrud {
    /**
     * 多參數封裝到一個類中，多條件查詢
     * @throws IOException
     */
      @Test
      public void findByCondition() throws IOException {
          InputStream inputStream = Resources.getResourceAsStream("Mybatis-configuration.xml");
          SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);
          SqlSession sqlSession = sqlSessionFactory.openSession();
          //獲取某接口的動態代理對象（獲取某接口的一個實現類）
          UserMapper userMapper = sqlSession.getMapper(UserMapper.class);
          QueryValueObject queryValueObject = new QueryValueObject();
          User user = new User();
          user.setUsername("a");
          user.setSex("男");
          queryValueObject.setPageSize(5);
          queryValueObject.setStartIndex(0);
          queryValueObject.setUser(user);
          List<User> userMapperByCondition = userMapper.findByCondition(queryValueObject);
          for (User user1 : userMapperByCondition) {
              System.out.println(user1);
          }
          sqlSession.close();
      }
}

5.測試結果