Spring整合Mybatis（IDEA版）

時間 2019-11-07

標籤 spring 整合 mybatis idea 欄目 Spring 简体版

原文原文鏈接

本文適用於初學者：java

該文主要教你們如何整合spring和mybatis，整合完成效果，能夠從數據庫中查詢出學生信息：mysql

完整的工程目錄以下：web

整合思路：spring

須要spring來管理數據源信息。
須要spring經過單例方式管理SqlSessionFactory。
使用SqlSessionFactory建立SqlSession。（spring和mybatis整合自動完成）
持久層的mapper都須要由spring進行管理，spring和mybatis整合生成mapper代理對象。

下面開始工程搭建：sql

第一步：建立工程 File—New—Project

點擊Finish完成數據庫

注意：項目建立完成會有以下圖提示：apache

這裏是問你是否要自動導入，選擇Enable便可，maven便會自動幫你導入jar包json

第二步：項目準備

本項目須要用到mysql數據庫，首先先在mysql中建立一個數據庫，而後建立一張表，sql語句以下：api

 1 CREATE DATABASE /*!32312 IF NOT EXISTS*/`test` /*!40100 DEFAULT CHARACTER SET utf8 */;
 2 
 3 USE `test`;
 4 
 5 /*Table structure for table `student` */
 6 
 7 DROP TABLE IF EXISTS `student`;
 8 
 9 CREATE TABLE `student` (
10   `id` int(11) DEFAULT NULL,
11   `username` varchar(20) DEFAULT NULL,
12   `password` varchar(20) DEFAULT NULL,
13   `email` varchar(20) DEFAULT NULL
14 ) ENGINE=InnoDB DEFAULT CHARSET=utf8;
15 
16 /*Data for the table `student` */
17 
18 insert  into `student`(`id`,`username`,`password`,`email`) values 
19 (1,'jack','123','123@jack'),
20 (2,'rose','520','rose@123');

sql語句

第三步：正式開發

（1）、修改pom文件mybatis

  1 <?xml version="1.0" encoding="UTF-8"?>
  2 <project xmlns="http://maven.apache.org/POM/4.0.0"
  3          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  4          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  5     <modelVersion>4.0.0</modelVersion>
  6 
  7     <groupId>cn.grandage</groupId>
  8     <artifactId>SpringMybatisTest</artifactId>
  9     <version>1.0-SNAPSHOT</version>
 10 
 11     <properties>
 12         <!-- spring版本號 -->
 13         <spring.version>4.1.6.RELEASE</spring.version>
 14         <!-- mybatis版本號 -->
 15         <mybatis.version>3.2.6</mybatis.version>
 16         <!-- log4j日誌文件管理包版本 -->
 17         <slf4j.version>1.7.7</slf4j.version>
 18         <log4j.version>1.2.17</log4j.version>
 19     </properties>
 20     <dependencies>
 21         <dependency>
 22             <groupId>junit</groupId>
 23             <artifactId>junit</artifactId>
 24             <version>4.11</version>
 25             <!-- 表示開發的時候引入，發佈的時候不會加載此包 -->
 26             <scope>test</scope>
 27         </dependency>
 28         <!-- spring核心包 -->
 29         <dependency>
 30             <groupId>org.springframework</groupId>
 31             <artifactId>spring-core</artifactId>
 32             <version>${spring.version}</version>
 33         </dependency>
 34         <dependency>
 35             <groupId>org.springframework</groupId>
 36             <artifactId>spring-web</artifactId>
 37             <version>${spring.version}</version>
 38         </dependency>
 39         <dependency>
 40             <groupId>org.springframework</groupId>
 41             <artifactId>spring-oxm</artifactId>
 42             <version>${spring.version}</version>
 43         </dependency>
 44         <dependency>
 45             <groupId>org.springframework</groupId>
 46             <artifactId>spring-tx</artifactId>
 47             <version>${spring.version}</version>
 48         </dependency>
 49         <dependency>
 50             <groupId>org.springframework</groupId>
 51             <artifactId>spring-jdbc</artifactId>
 52             <version>${spring.version}</version>
 53         </dependency>
 54         <dependency>
 55             <groupId>org.springframework</groupId>
 56             <artifactId>spring-webmvc</artifactId>
 57             <version>${spring.version}</version>
 58         </dependency>
 59         <dependency>
 60             <groupId>org.springframework</groupId>
 61             <artifactId>spring-aop</artifactId>
 62             <version>${spring.version}</version>
 63         </dependency>
 64         <dependency>
 65             <groupId>org.springframework</groupId>
 66             <artifactId>spring-context-support</artifactId>
 67             <version>${spring.version}</version>
 68         </dependency>
 69         <dependency>
 70             <groupId>org.springframework</groupId>
 71             <artifactId>spring-test</artifactId>
 72             <version>${spring.version}</version>
 73         </dependency>
 74         <!-- mybatis核心包 -->
 75         <dependency>
 76             <groupId>org.mybatis</groupId>
 77             <artifactId>mybatis</artifactId>
 78             <version>${mybatis.version}</version>
 79         </dependency>
 80         <!-- mybatis/spring包 -->
 81         <dependency>
 82             <groupId>org.mybatis</groupId>
 83             <artifactId>mybatis-spring</artifactId>
 84             <version>1.2.2</version>
 85         </dependency>
 86         <!-- 導入java ee jar 包 -->
 87         <dependency>
 88             <groupId>javax</groupId>
 89             <artifactId>javaee-api</artifactId>
 90             <version>7.0</version>
 91         </dependency>
 92         <!-- 導入Mysql數據庫連接jar包 -->
 93         <dependency>
 94             <groupId>mysql</groupId>
 95             <artifactId>mysql-connector-java</artifactId>
 96             <version>5.1.39</version>
 97         </dependency>
 98         <!-- c3p0鏈接池jar -->
 99         <dependency>
100             <groupId>c3p0</groupId>
101             <artifactId>c3p0</artifactId>
102             <version>0.9.1.2</version>
103         </dependency>
104         <!-- 導入dbcp的jar包，用來在applicationContext.xml中配置數據庫 -->
105         <dependency>
106             <groupId>commons-dbcp</groupId>
107             <artifactId>commons-dbcp</artifactId>
108             <version>1.2.2</version>
109         </dependency>
110         <!-- JSTL標籤類 -->
111         <dependency>
112             <groupId>jstl</groupId>
113             <artifactId>jstl</artifactId>
114             <version>1.2</version>
115         </dependency>
116         <!-- 日誌文件管理包 -->
117         <!-- log start -->
118         <dependency>
119             <groupId>log4j</groupId>
120             <artifactId>log4j</artifactId>
121             <version>${log4j.version}</version>
122         </dependency>
123         <!-- 格式化對象，方便輸出日誌 -->
124         <dependency>
125             <groupId>com.alibaba</groupId>
126             <artifactId>fastjson</artifactId>
127             <version>1.1.41</version>
128         </dependency>
129         <dependency>
130             <groupId>org.slf4j</groupId>
131             <artifactId>slf4j-api</artifactId>
132             <version>${slf4j.version}</version>
133         </dependency>
134         <dependency>
135             <groupId>org.slf4j</groupId>
136             <artifactId>slf4j-log4j12</artifactId>
137             <version>${slf4j.version}</version>
138         </dependency>
139         <!-- log end -->
140         <!-- 映入JSON -->
141         <dependency>
142             <groupId>org.codehaus.jackson</groupId>
143             <artifactId>jackson-mapper-asl</artifactId>
144             <version>1.9.13</version>
145         </dependency>
146         <!-- 上傳組件包 -->
147         <dependency>
148             <groupId>commons-fileupload</groupId>
149             <artifactId>commons-fileupload</artifactId>
150             <version>1.3.1</version>
151         </dependency>
152         <dependency>
153             <groupId>commons-io</groupId>
154             <artifactId>commons-io</artifactId>
155             <version>2.4</version>
156         </dependency>
157         <dependency>
158             <groupId>commons-codec</groupId>
159             <artifactId>commons-codec</artifactId>
160             <version>1.9</version>
161         </dependency>
162     </dependencies>
163 
164 
165 </project>

POM文件

（2）、新建實體類Student：

 1 package cn.grandage.pojo;
 2 
 3 public class Student {
 4 
 5     private Integer id;
 6     private String username;
 7     private String password;
 8     private String email;
 9 
10     public Integer getId() {
11         return id;
12     }
13 
14     public void setId(Integer id) {
15         this.id = id;
16     }
17 
18     public String getUsername() {
19         return username;
20     }
21 
22     public void setUsername(String username) {
23         this.username = username;
24     }
25 
26     public String getPassword() {
27         return password;
28     }
29 
30     public void setPassword(String password) {
31         this.password = password;
32     }
33 
34     public String getEmail() {
35         return email;
36     }
37 
38     public void setEmail(String email) {
39         this.email = email;
40     }
41 
42     @Override
43     public String toString() {
44         return "StudentMapper{" +
45                 "id=" + id +
46                 ", username='" + username + '\'' +
47                 ", password='" + password + '\'' +
48                 ", email='" + email + '\'' +
49                 '}';
50     }
51 }

Student

（3）、新建db.properties文件

1 db.driver=com.mysql.jdbc.Driver
2 #數據庫鏈接字符串(改爲本身的鏈接)
3 db.url=jdbc:mysql://localhost:3306/test
4 #數據庫用戶名(這裏改爲本身的用戶名)
5 db.username=root
6 #數據庫密碼(這裏改爲本身的密碼)
7 db.password=123456

db.properties

（4）、新建StudentMapper接口

1 package cn.grandage.mapper;
2 
3 
4 import cn.grandage.pojo.Student;
5 
6 public interface StudentMapper {
7 
8     public Student findStudentById(int id);
9 }

StudentMapper

（5）、新建mybatis映射配置文件：

 1 <?xml version="1.0" encoding="UTF-8" ?>
 2 <!DOCTYPE mapper
 3         PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
 4         "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
 5 <!-- namespace：命名空間，對sql進行一個分類管理 -->
 6 <!-- 注意：namespace在mapper代理時，具備重要且特殊的做用
 7     對應mapper接口的全限定名
 8 -->
 9 
10 <!--mybatis映射配置文件-->
11 <mapper namespace="cn.grandage.mapper.StudentMapper">
12     <select id="findStudentById" parameterType="int" resultType="student">
13         select * from student where id=#{id}
14     </select>
15 </mapper>

Student.xml

（6）、新建mybatis核心配置文件

 1 <?xml version="1.0" encoding="UTF-8" ?>
 2 <!DOCTYPE configuration
 3         PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
 4         "http://mybatis.org/dtd/mybatis-3-config.dtd">
 5 <configuration>
 6     <!--mybatis核心配置文件-->
 7 
 8     <!--給類取別名，簡化輸入，方便映射配置文件中使用-->
 9    <typeAliases>
10        <typeAlias type="cn.grandage.pojo.Student" alias="student"/>
11    </typeAliases>
12 
13     <!--加載mapper映射配置文件-->
14     <mappers>
15         <mapper resource="Student.xml"/>
16     </mappers>
17 
18 </configuration>

SqlMapConfig.xml

（7）、新建spring核心配置文件，並整合mybatis：

 1 <?xml version="1.0" encoding="UTF-8" ?>
 2 <!DOCTYPE configuration
 3         PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
 4         "http://mybatis.org/dtd/mybatis-3-config.dtd">
 5 <configuration>
 6     <!--mybatis核心配置文件-->
 7 
 8     <!--給類取別名，簡化輸入，方便映射配置文件中使用-->
 9    <typeAliases>
10        <typeAlias type="cn.grandage.pojo.Student" alias="student"/>
11    </typeAliases>
12 
13     <!--加載mapper映射配置文件-->
14     <mappers>
15         <mapper resource="Student.xml"/>
16     </mappers>
17 
18 </configuration>

applicationContext.xml

（8）、測試類編寫：

 1 import cn.grandage.mapper.StudentMapper;
 2 import cn.grandage.pojo.Student;
 3 import org.junit.Test;
 4 import org.springframework.context.ApplicationContext;
 5 import org.springframework.context.support.ClassPathXmlApplicationContext;
 6 
 7 public class Test01 {
 8 
 9     @Test
10     public void test01() {
11         //獲取applicationContext文件並加載
12         ApplicationContext ac = new ClassPathXmlApplicationContext("applicationContext.xml");
13         //獲取StudentDao的bean
14         StudentMapper sd = (StudentMapper) ac.getBean("studentMapper");
15         Student s = sd.findStudentById(1);
16         System.out.println("學生姓名：" + s.getUsername());
17         System.out.println("學生密碼：" + s.getPassword());
18         System.out.println("學生郵箱：" + s.getEmail());
19     }
20 }