mybatis学习(23):分页1 多参数传递（索引方式）

Posted 2022-09-27

分页排序

目录结构

 

 

 

com.geyao.mybatis.mapper

BlogMapper类

package com.geyao.mybatis.mapper;
 
import java.util.List;
 
import com.geyao.mybatis.pojo.Blog;
 
public interface BlogMapper
    Blog selectBlog(Integer id);
    
    Blog selectBlog2(Integer id);
    
    List<Blog> selectBlogByTitle(String title);
    
    List<Blog> selectBlogByTitle2(String title);
    
    List<Blog> selectBlogBySort(String column);
    
    List<Blog> selectBlogByPage(int offset,int pagesize);

BlogMapper.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">
<!-- 为这个mapper指定一个唯一的namespace，namespace的值习惯上设置成包名+sql映射文件名，这样就能够保证namespace的值是唯一的
例如namespace="me.gacl.mapping.userMapper"就是me.gacl.mapping(包名)+userMapper(userMapper.xml文件去除后缀)
 -->
<mapper namespace="com.geyao.mybatis.mapper.BlogMapper">
    <!-- 在select标签中编写查询的SQL语句， 设置select标签的id属性为getUser，id属性值必须是唯一的，不能够重复
    使用parameterType属性指明查询时使用的参数类型，resultType属性指明查询返回的结果集类型
    resultType="me.gacl.domain.User"就表示将查询结果封装成一个User类的对象返回
    User类就是users表所对应的实体类
    -->
    <!-- 
        根据id查询得到一个user对象
     -->
     <resultMap type="Blog" id="blogResultMap">
     <id column="id" property="id" jdbcType="INTEGER"></id>
         <result column="authod_id" property="authodId" jdbcType="INTEGER"/>
     </resultMap>
     
    <select id="selectBlog" parameterType="int"   resultType="Blog">
        select 
        id,
        title,
        authod_id as authodId,
        state,
        featured,
        style
         from Blog where id=#id
    </select> 
    
    <select id="selectBlog2" parameterType="int"  resultMap="blogResultMap">
          select *
         from Blog where id=#id
    </select>
    
    <select id="selectBlogByTitle" parameterType="String" resultMap="blogResultMap">
        select * from Blog where title like #title
    </select>
    
    <select id="selectBlogByTitle2" parameterType="String" resultMap="blogResultMap">
        select * from Blog where title like $value
    </select>
    
     <select id="selectBlogBySort" parameterType="String" resultMap="blogResultMap">
        select * from Blog order by $value
    </select>
    
      <select id="selectBlogByPage"  resultMap="blogResultMap">
        select * from Blog limit #0,#1
    </select>
</mapper>
com.geyao.mybatis.pojo

Blog类

package com.geyao.mybatis.pojo;
 
public class Blog
    private Integer id;
    private String title;
    private int authodId;
    private String state;
    private Boolean featured;
    private String style;
    public Integer getId()
        return id;
    
    public void setId(Integer id)
        this.id = id;
    
    public String getTitle()
        return title;
    
    public void setTitle(String title)
        this.title = title;
    
    
    public int getAuthodId()
        return authodId;
    
    public void setAuthodId(int authodId)
        this.authodId = authodId;
    
    public String getState()
        return state;
    
    public void setState(String state)
        this.state = state;
    
    public Boolean getFeatured()
        return featured;
    
    public void setFeatured(Boolean featured)
        this.featured = featured;
    
    public String getStyle()
        return style;
    
    public void setStyle(String style)
        this.style = style;
    
    @Override
    public String toString()
        return "Blog [id=" + id + ", title=" + title + ", authodId=" + authodId + ", state=" + state + ", featured="
                + featured + ", style=" + style + "]\\n";
    
    
    
    
    

com.geyao.mybatis.util

MybatisUtil类

package com.geyao.mybatis.util;
 
import java.io.InputStream;
import java.io.Reader;
 
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 MyBatisUtil
    private static SqlSessionFactory sqlSessionFactory =null;
    static
        try
            InputStream in = Resources.getResourceAsStream("mybatis-config.xml");
            sqlSessionFactory = new SqlSessionFactoryBuilder().build(in);
         catch (Exception e)
            // TODO Auto-generated catch block
            e.printStackTrace();
        
    
    private MyBatisUtil()
    
    public static SqlSession getSqlSession()
        return sqlSessionFactory.openSession();
    

log4j.properties

### \\u914D\\u7F6E\\u6839 ###
log4j.rootLogger = debug,console ,fileAppender,dailyRollingFile,ROLLING_FILE,MAIL,DATABASE
 
### \\u8BBE\\u7F6E\\u8F93\\u51FAsql\\u7684\\u7EA7\\u522B\\uFF0C\\u5176\\u4E2Dlogger\\u540E\\u9762\\u7684\\u5185\\u5BB9\\u5168\\u90E8\\u4E3Ajar\\u5305\\u4E2D\\u6240\\u5305\\u542B\\u7684\\u5305\\u540D ###
log4j.logger.org.apache=dubug
log4j.logger.java.sql.Connection=dubug
log4j.logger.java.sql.Statement=dubug
log4j.logger.java.sql.PreparedStatement=dubug
log4j.logger.java.sql.ResultSet=dubug
 
### \\u914D\\u7F6E\\u8F93\\u51FA\\u5230\\u63A7\\u5236\\u53F0 ###
log4j.appender.console = org.apache.log4j.ConsoleAppender
log4j.appender.console.Target = System.out
log4j.appender.console.layout = org.apache.log4j.PatternLayout
log4j.appender.console.layout.ConversionPattern =  %dABSOLUTE %5p %c1:%L - %m%n
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>
 
<typeAliases>
    <typeAlias type="com.geyao.mybatis.pojo.Blog" alias="Blog"/>
</typeAliases>
    <environments default="development">
        <environment id="development">
            <transactionManager type="JDBC" />
            <!-- 配置数据库连接信息 -->
            <dataSource type="POOLED">
                <property name="driver" value="com.mysql.cj.jdbc.Driver" />
                <property name="url" value="jdbc:mysql://localhost:3306/mybatis?serverTimezone=GMT%2B8" />
                <property name="username" value="root" />
                <property name="password" value="123" />
            </dataSource>
        </environment>
    </environments>
      <mappers>
        <!-- 注册userMapper.xml文件， 
         userMapper.xml位于me.gacl.mapping这个包下，所以resource写成me/gacl/mapping/userMapper.xml-->
         <mapper resource="com/geyao/mybatis/mapper/BlogMapper.xml"/>
     </mappers>
</configuration>
单元测试

com.geyao.mybatis.util

testSelectBlog类

package com.geyao.mybatis.mapper;
 
import java.util.List;
 
import org.apache.ibatis.session.SqlSession;
import org.junit.Test;
 
import com.geyao.mybatis.pojo.Blog;
import com.geyao.mybatis.util.MyBatisUtil;
 
public class testSelectBlog
    @Test
    public void testSelectBlogNoInterface()
        SqlSession session =MyBatisUtil.getSqlSession();
        Blog blog =(Blog)session.selectOne("com.geyao.mybatis.mapper.BlogMapper.selectBlog", 101);
        
        session.close();
        System.out.println(blog);
    
@Test
public void testSelectBlog()
    SqlSession session =MyBatisUtil.getSqlSession();
    BlogMapper blogMapper =session.getMapper(BlogMapper.class);
    
    Blog blog = blogMapper.selectBlog(1);
    System.out.println(blog);

 
@Test
public void testSelectBlog2()
    SqlSession session =MyBatisUtil.getSqlSession();
    BlogMapper blogMapper =session.getMapper(BlogMapper.class);
    
    Blog blog = blogMapper.selectBlog2(1);
    System.out.println(blog);

@Test
public void testselectBlogByTitle()
    SqlSession session =MyBatisUtil.getSqlSession();
    BlogMapper blogMapper =session.getMapper(BlogMapper.class);
    
    List<Blog> blogList = blogMapper.selectBlogByTitle("%g%");
    System.out.println(blogList);

 
@Test
public void testselectBlogByTitle2()
    SqlSession session =MyBatisUtil.getSqlSession();
    BlogMapper blogMapper =session.getMapper(BlogMapper.class);
    
    List<Blog> blogList = blogMapper.selectBlogByTitle2("%g%");
    System.out.println(blogList);

@Test
public void testselectBlogBySort()
    SqlSession session =MyBatisUtil.getSqlSession();
    BlogMapper blogMapper =session.getMapper(BlogMapper.class);
    
    List<Blog> blogList = blogMapper.selectBlogBySort("title");
    System.out.println(blogList);

@Test
public void testselectBlogByPage()
    SqlSession session =MyBatisUtil.getSqlSession();
    BlogMapper blogMapper =session.getMapper(BlogMapper.class);
    
    List<Blog> blogList = blogMapper.selectBlogByPage(2,2);
    System.out.println(blogList);


jar包

链接：https://pan.baidu.com/s/1g6NgzfLc5uK9S4VL-03lHg
提取码：4r2m

运行结果