MyBatis入门（三）---多个参数

一、建立表

1.1、建立表，并插入数据

 

/*SQLyog EnterPRise v12.09 (64 bit)MySQL - 5.6.27-log : Database - mybatis
**********************************************************************//*!40101 SET NAMES utf8 */;/*!40101 SET SQL_MODE=''*/;/*!40014 SET @OLD_UNIQUE_CHECKS=@@UNIQUE_CHECKS, UNIQUE_CHECKS=0 */;/*!40014 SET @OLD_FOREIGN_KEY_CHECKS=@@FOREIGN_KEY_CHECKS, FOREIGN_KEY_CHECKS=0 */;/*!40101 SET @OLD_SQL_MODE=@@SQL_MODE, SQL_MODE='NO_AUTO_VALUE_ON_ZERO' */;/*!40111 SET @OLD_SQL_NOTES=@@SQL_NOTES, SQL_NOTES=0 */;CREATE DATABASE /*!32312 IF NOT EXISTS*/`mybatis` /*!40100 DEFAULT CHARACTER SET utf8 */;USE `mybatis`;/*Table structure for table `author` */DROP TABLE IF EXISTS `author`;CREATE TABLE `author` (
 `author_id` int(11) unsigned NOT NULL AUTO_INCREMENT COMMENT '作者ID主键',
 `author_username` varchar(30) NOT NULL COMMENT '作者用户名',
 `author_passWord` varchar(32) NOT NULL COMMENT '作者密码',
 `author_email` varchar(50) NOT NULL COMMENT '作者邮箱',
 `author_bio` varchar(1000) DEFAULT '这家伙很赖，什么也没留下' COMMENT '作者简介',
 `register_time` datetime DEFAULT CURRENT_TIMESTAMP COMMENT '注册时间',  PRIMARY KEY (`author_id`)
) ENGINE=InnoDB AUTO_INCREMENT=10 DEFAULT CHARSET=utf8;/*Data for the table `author` */insert  into `author`(`author_id`,`author_username`,`author_password`,`author_email`,`author_bio`,`register_time`)
values (1,'张三','123456','123@QQ.com','张三是个新手，刚开始注册','2015-10-29 10:23:59'),(2,'李四','123asf','lisi@163.com','魂牵梦萦 ','2015-10-29 10:24:29'),(3,'王五','dfsd342','ww@sina.com','康熙王朝','2015-10-29 10:25:23'),(4,'赵六','123098sdfa','zhaoliu@qq.com','花午骨','2015-10-29 10:26:09'),(5,'钱七','zxasqw','qianqi@qq.com','这家伙很赖，什么也没留下','2015-10-29 10:27:04'),(6,'张三丰','123456','zhangsf@qq.com','这家伙很赖，什么也没留下','2015-10-29 11:48:00'),(7,'金庸','qwertyuiop','wuji@163.com','这家伙很赖，什么也没留下','2015-10-29 11:48:24'),(8,'知道了','456789','456789@qq.com','哈哈哈哈哈雅虎','2015-10-29 14:03:27'),(9,'不知道','1234567890','123456@qq.com','哈哈哈哈哈雅虎','2015-10-29 14:01:16');/*!40101 SET SQL_MODE=@OLD_SQL_MODE */;/*!40014 SET FOREIGN_KEY_CHECKS=@OLD_FOREIGN_KEY_CHECKS */;/*!40014 SET UNIQUE_CHECKS=@OLD_UNIQUE_CHECKS */;/*!40111 SET SQL_NOTES=@OLD_SQL_NOTES */;

 

 

 

二、创建项目

2.1、创建项目

2.2、创建POJO类

 

package com.pb.mybatis.po;import java.util.Date;/**
*

* @Title: Author.java

* @Package com.pb.mybatis.po

* @ClassName Author

* @Description: TODO(Blog作者类)

* @author 刘楠

* @date 2015-10-29 上午9:27:53

* @version V1.0 */public class Author {    //作者ID
   private int authorId;    
   //作者用户名
   private String authorUserName;    
   //作者密码
   private String authorPassword;    
   //作者邮箱
   private String authorEmail;    
   //作者介绍
   private int authorBio;    
   //注册时间
   private Date registerTime;    /**
    * @return the authorId     */
   public int getAuthorId() {        return authorId;
   }    /**
    * @param authorId the authorId to set     */
   public void setAuthorId(int authorId) {        this.authorId = authorId;
   }    /**
    * @return the authorUserName     */
   public String getAuthorUserName() {        return authorUserName;
   }    /**
    * @param authorUserName the authorUserName to set     */
   public void setAuthorUserName(String authorUserName) {        this.authorUserName = authorUserName;
   }    /**
    * @return the authorPassword     */
   public String getAuthorPassword() {        return authorPassword;
   }    /**
    * @param authorPassword the authorPassword to set     */
   public void setAuthorPassword(String authorPassword) {        this.authorPassword = authorPassword;
   }    /**
    * @return the authorEmail     */
   public String getAuthorEmail() {        return authorEmail;
   }    /**
    * @param authorEmail the authorEmail to set     */
   public void setAuthorEmail(String authorEmail) {        this.authorEmail = authorEmail;
   }    /**
    * @return the authorBio     */
   public int getAuthorBio() {        return authorBio;
   }    /**
    * @param authorBio the authorBio to set     */
   public void setAuthorBio(int authorBio) {        this.authorBio = authorBio;
   }    /**
    * @return the registerTime     */
   public Date getRegisterTime() {        return registerTime;
   }    /**
    * @param registerTime the registerTime to set     */
   public void setRegisterTime(Date registerTime) {        this.registerTime = registerTime;
   }    /** (non Javadoc)
   
    *

Title: toString

   
    *

Description:重写toString方法

   
    * @return
   
    * @see java.lang.Object#toString()     */
   @Override    public String toString() {        return "Author [authorId=" + authorId + ", authorUserName="
               + authorUserName + ", authorPassword=" + authorPassword                + ", authorEmail=" + authorEmail + ", authorBio=" + authorBio                + ", registerTime=" + registerTime + "]";
   }

   
   
   
}

 

 

 

2.3、创建configruation

 

PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">









   
   
       
       
       
       
   

 

 

 

2.3、创建mapper接口

 

public interface AuthorMapper {    
   /**
    *
    * @Title: findById
   
    * @Description: TODO(根据查找一个用户)
   
    * @param id
    * @return Author     */
   public Author findAuthorById(int authorId);

}

 

 

 

2.4、创建mapper.xml

 

PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">SELECT * FROM author
WHERE author_id=#{authorId}

 

 

 

三、传入多个ID，进行查找使用List

3.1、更改Mapper接口

 

/**
    *
    * @Title: findAuthors
   
    * @Description: TODO(根据多个ID进行查找)
   
    * @param idLists
    * @return List     */
   public List findAuthors(List idLists);

 

3.2、更改Mapper.xml

 

SELECT * FROM author
WHERE author_id in#{item}

       

 

3.3、测试

 

@Test    public void testFindAuthors() {        //获取会话
       Sqlsession sqlSession=sqlSessionFactory.openSession();        //Mapper接口
       AuthorMapper authorMapper=sqlSession.getMapper(AuthorMapper.class);
       List list=new ArrayList();
       
       list.add(1);
       list.add(3);
       list.add(4);
       list.add(6);
       list.add(7);        //调用方法
       List authors=authorMapper.findAuthors(list);
       System.out.println(authors);        //关闭会话        sqlSession.close();
   }

 

 

四、使用Map做为参数

4.1、在Mapper接口中增加相应方法

 

/**
    *
    * @Title: findAuthorsByMap
   
    * @Description: TODO(使用Map做为参数)
   
    * @param map
    * @return List     */
   public List findAuthorsByMap(Map map);

 

4.2、更改Mapper.xml

 

SELECT * FROM authorWHERE author_username LIKE "%"#{username}"%"
or author_bio like"%"#{bio}"%"

 

4.3、测试

 

@Test    public void testFindAuthorsByMap() {        //获取会话
               SqlSession sqlSession=sqlSessionFactory.openSession();                //Mapper接口
               AuthorMapper authorMapper=sqlSession.getMapper(AuthorMapper.class);
               Map map=new HashMap();
               map.put("username", "张");
               map.put("bio", "哈");                
               //调用方法
               List authors=authorMapper.findAuthorsByMap(map);
               System.out.println(authors);                //关闭会话                sqlSession.close();                for(Author a:authors){
                   System.out.println(a.toString());
               }
   }

 

 

 

五、直接使用多个参数

5.1、Mapper接口

 

/**
    *
    * @Title: findAuthorsByParams
   
    * @Description: TODO(使用多个参数
   
    * @param id
    * @param username
    * @return List     */
   public List findAuthorsByParams(int authorId,String authorUserName);

 

5.2、Mapper.xml

 

SELECT * FROM author
WHERE author_id=#{0}
OR author_username LIKE "%"#{1}"%"

 

5.3、测试

 

@Test    public void testFindAuthorsByParams() {        //获取会话
               SqlSession sqlSession=sqlSessionFactory.openSession();                //Mapper接口
               AuthorMapper authorMapper=sqlSession.getMapper(AuthorMapper.class);                
               
               //调用方法
               List authors=authorMapper.findAuthorsByParams(6,"张");
               System.out.println(authors);                //关闭会话                sqlSession.close();                for(Author a:authors){
                   System.out.println(a.toString());
               }
   }

 

 

六、直接使用多个参数注解写法

6.1、Mapper接口

 

public List findAuthorsByParams(@Param("id") int authorId,@Param("username")String authorUserName);

 

 

 

6.2、Mapper.xml

SELECT * FROM author
WHERE author_id=#{id}
or author_username LIKE "%"#{username}"%"

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