Erste Schritte mit MyBatis (3) --- Mehrere Parameter

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: Datenbank – 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`;/*Tabellenstruktur für Tabelle `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 MENT '注册时间', PRIMARY KEY (`author_id`)
) ENGINE=InnoDB AUTO_INCREMENT=10 DEFAULT CHARSET=utf8;/*Daten für die Tabelle `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

* @Beschreibung: TODO (Blog-Autorenklasse)

* @Autor Liu Nan

* @Datum 29.10.2015 9:27:53 Uhr

* @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 die Autoren-ID    */
   public int getAuthorId() {        return authorId;
   }    /**
    * @param authorId die festzulegende Autoren-ID    */
   public void setAuthorId(int authorId) {        this.authorId = authorId;    }    /**
    * @return the authorUserName    */
   public String getAuthorEmail() {        return authorEmail;
   }    /**
    * @param AuthorUserName der festzulegende AuthorUserName    */
   public void setAuthorEmail(String authorEmail ) {        this.authorEmail = authorEmail;
   }    /**
    * @return theauthorPassword    */
   public int getAuthorBio() {        return authorBio;
   }    /**
    * @param AuthorPassword das festzulegende AuthorPassword    */
   public void io (int authorBio) {        this.authorBio = authorBio;
   }    /**
    * @return the authorEmail    */
   public Date getRegisterTime() {        return registerTime;
   }    /**
    * @param authorE-Mail an den festzulegenden AutorE-Mail    */
public void setRegisterTime(Date registerTime) {        this.registerTime = registerTime;
   }    /**
    * @return the authorBio    */
   @Override    public String toString() {        return "Author [authorId=" + authorId + ", authorUserName = "
+ Authorusername +", AuthorPassword = " + AuthorPassword +", Authoremail = " + Authoremail +", AuthorBio = " + AuthorBio +", RegisterTime = " + RegisterTime +";
}

   
   
   
}


 

 

 

2.3、创建Konfiguration

 

Konfiguration
 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 (einen Benutzer basierend auf finden)

* @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} select>

 

 

 

三、传入多个ID，进行查找使用List

3.1、更改Mapper接口

 

/**
*
* @Title: findAuthors

* @Description: TODO (Suche basierend auf mehreren 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() { //Sitzung abrufen
Sqlsession sqlSession=sqlSessionFactory.openSession(); //Mapper-Schnittstelle
AuthorMapper authorMapper=sqlSession.getMapper(AuthorMapper.class);
List< ;Integer> list=new ArrayList();
.add (6); Schließe die Sitzung sqlSession();
}






4. Map als Parameter verwenden

4.1 Im Mapper entsprechende Methoden zur Schnittstelle hinzufügen

/**

*

* @Title: findAuthorsByMap

* @Description: TODO (Map als Parameter verwenden)

* @param map

* @return List*/
public List map);



4.2. Mapper.xml ändern

SELECT * FROM authorWHERE autorenbenutzername LIKE „%“#{username}“%“
or author_bio like“%“#{bio}“%“

Test

@Test public void testFindAuthorsByMap() { //Get session
SqlSession sqlSession=sqlSessionFactory.openSession (); Map map=new HashMap                     map.put("username", "张"); .close(); System.out.println(a.toString());

                                                                                                                    Mapper-Schnittstelle

/**

*

* @Title: findAuthorsByParams

* @Description: TODO(unter Verwendung mehrerer Parameter

* @param id
* @param Benutzername
* @ return Liste*/
öffentliche Liste



5.2, Mapper.xml

SELECT * FROM author

WHERE author_id=#{0}

OR author_username LIKE "%"#{1}"%"

5.3, Test

@Test public void testFindAuthorsByParams() { //Sitzung abrufen
SqlSession sqlSession=sqlSessionFactory.openSession(); //Mapper-Schnittstelle
AuthorMapper authorMapper=sqlSession.getMapper(AuthorMapper.class);​​​​ passieren Autor a:authors){
System.out.println(a.toString());
}
}


🎜 >6. Direkte Verwendung mehrerer Parameteranmerkungen

6.1, Mapper-Schnittstelle

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

6.2, Mapper.xml

< !--Verwenden Sie mehrere Parameter mithilfe von Anmerkungen --> ;SELECT * FROM author

WHERE author_id=#{id}

or author_username LIKE "%"#{username}"%"

Das Obige ist die Einführung in MyBatis (3) – der Inhalt mehrerer Parameter. Bitte achten Sie auf die chinesische PHP-Website (www.php.cn)!