Getting Started with MyBatis (3) --- Multiple Parameters

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 author class)

* @author Liu Nan

* @date 2015-10-29 9:27:53 AM

* @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

 

br/>  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 (find a user based on it)

* @param id
* @return Author*/
   public Author findAuthorById(int authorId);

}

 

 

 

2.4、创建mapper.xml

 

br/>  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 (Search based on multiple IDs)

* @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() {         //Get the session
                sqlsession sqlSession=sqlSessionFactory.openSession();             //Mapper interface
            AuthorMapper=sqlSession.getMapper(A uthorMapper.class);
List list=new ArrayList();
       
          list.add(1);
          list.add(3); //Call method
List authors=authorMapper.findAuthors(list);
System.out.println(authors); //Close session sqlSession.close();
}

4. Use Map as parameter

4.1. Add corresponding methods to the Mapper interface

/**

*

* @Title: findAuthorsByMap

* @Description: TODO (use Map as parameter)

* @param map
* @return List*/
public List findAuthorsByMap(Map map);

4.2. Change Mapper. xml

SELECT * FROM authorWHERE author_username LIKE "%"#{username}"%"

or author_bio like "%"#{bio}"%"

4.3、Test

@Test public void testFindAuthorsByMap() {                                                                                                                                                                                                  sqlSession and‑‑       sqlSession=sqlSessionFactory.openSession();‑‑               pper(AuthorMapper.class);

Map map=new HashMap() ;

                   map.put("username", "张"); 

                  map.put(("bio", " "); List authors=authorMapper.findAuthorsByMap(map);
System .out.println(authors);                                 sqlSession.close(); ));
                                                            


5. Use multiple parameters directly

5.1, Mapper interface



/**
* *

* @Title: findAuthorsByParams

* @Description: TODO(Use multiple parameters

* @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, test

@Test public void testFindAuthorsByParams() { //Get session
           SqlSession sqlSession=sqlSessionFactory.openSession();                                                AuthorMapper authorMapper=sqlSession.getMapper(AuthorMapper.class); > ; authors=authorMapper.findAuthorsByParams(6,"张");
System.out.println(authors); :authors){
                System.out.println(a .toString());
                                                                                                                             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}"%"

The above is the content of MyBatis Getting Started (3)---multiple parameters. For more related content, please pay attention to the PHP Chinese website (www.php .cn)!