SpringBoot整合Mybatis 以及 mybatis自动生成代码配置

1、springboot的配置文件application.yml

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1. #端口  
2. server:  
3.   port: 8080  
4.   
5.   #模板页面  
6.   #注释的部分是Thymeleaf默认的配置，如有其它需求可以自行更改  
7.   spring:  
8.     thymeleaf:  
9.       cache: false  
10.       prefix: classpath:/templates/  
11.       suffix: .html  
12.       mode: LEGACYHTML5  
13. #      encoding: UTF-8  
14. #      content-type: text/html  
15.   
16. ##数据源一  
17. #spring:  
18. #      datasource:  
19. #          driverClass: com.mysql.jdbc.Driver  
20. #          url: jdbc:mysql://127.0.0.1:3306/test?useUnicode=true&characterEncoding=utf-8  
21. #          username: xuan  
22. #          password: 123456  
23. #数据源二  
24. spring:  
25.       datasource:  
26.           url: jdbc:mysql://127.0.0.1:3306/test?useUnicode=true&characterEncoding=utf-8  
27.           username: xuan  
28.           password: 123456  
29.           # 使用druid数据源  
30.           type: com.alibaba.druid.pool.DruidDataSource  
31.           driver-class-name: com.mysql.cj.jdbc.Driver  
32.           filters: stat  
33.           maxActive: 20  
34.           initialSize: 1  
35.           maxWait: 60000  
36.           minIdle: 1  
37.           timeBetweenEvictionRunsMillis: 60000  
38.           minEvictableIdleTimeMillis: 300000  
39.           validationQuery: select 'x'  
40.           testWhileIdle: true  
41.           testOnBorrow: false  
42.           testOnReturn: false  
43.           poolPreparedStatements: true  
44.           maxOpenPreparedStatements: 20  
45.   
46. #spring-boot整合mybatis  
47. mybatis:  
48.   #config-location: classpath:/mapper/config/mybatisConfig.xml #可以注射掉,没用到该配置文件  
49.   mapper-locations: classpath:/mapper/*Mapper.xml  
50.   #type-aliases-package: com.xuan.entity  

2、maven的配置文件pom.xml (加入springboot整合mybatis的jar包，以及mysql驱动jar包，阿里的数据库链接池jar包)

以及mybatis 自动生成代码的一些配置

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1. <?xml version="1.0" encoding="UTF-8"?>  
2. <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  
3.          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">  
4.     <modelVersion>4.0.0</modelVersion>  
5.   
6.     <groupId>com.xuan</groupId>  
7.     <artifactId>myspringboot</artifactId>  
8.     <version>0.0.1-SNAPSHOT</version>  
9.     <packaging>jar</packaging>  
10.   
11.     <name>myspringboot</name>  
12.     <description>Demo project for Spring Boot</description>  
13.   
14.     <parent>  
15.         <groupId>org.springframework.boot</groupId>  
16.         <artifactId>spring-boot-starter-parent</artifactId>  
17.         <version>1.5.8.RELEASE</version>  
18.         <relativePath/> <!-- lookup parent from repository -->  
19.     </parent>  
20.   
21.     <properties>  
22.         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>  
23.         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>  
24.         <java.version>1.8</java.version>  
25.   
26.         <mybatis.generator.version>1.3.2</mybatis.generator.version>  
27.         <mysql.connector.java.version>6.0.6</mysql.connector.java.version>  
28.   
29.   
30.         <!-- Used by MyBatis Generator to Generate Codes -->  
31.         <!-- 运行命令: mvn mybatis-generator:generate -e -->  
32.         <!--<classPathEntry.mysql.location>${basedir}/target/${project.artifactId}/WEB-INF/lib/mysql-connector-java-${mysql.connector.java.version}.jar</classPathEntry.mysql.location>-->  
33.         <classPathEntry.mysql.location>/Users/chenqixuan/.m2/repository/mysql/mysql-connector-java/5.1.38/mysql-connector-java-5.1.38.jar</classPathEntry.mysql.location>  
34.         <javaModelGenerator.targetProject>${basedir}/src/main/java</javaModelGenerator.targetProject>  
35.         <sqlMapGenerator.targetProject>${basedir}/src/main/resources</sqlMapGenerator.targetProject>  
36.         <javaClientGenerator.targetProject>${basedir}/src/main/java</javaClientGenerator.targetProject>  
37.         <mybatis.generator.configurationFile>${basedir}/src/main/resources/generator/generatorConfig.xml</mybatis.generator.configurationFile>  
38.         <mybatis.generator.overwrite>true</mybatis.generator.overwrite>  
39.     </properties>  
40.   
41.     <dependencies>  
42.         <!--springboot整合redis-->  
43.         <dependency>  
44.             <groupId>org.springframework.boot</groupId>  
45.             <artifactId>spring-boot-starter-data-redis</artifactId>  
46.         </dependency>  
47.         <!--springboot整合mybatis-->  
48.         <dependency>  
49.             <groupId>org.mybatis.spring.boot</groupId>  
50.             <artifactId>mybatis-spring-boot-starter</artifactId>  
51.             <version>1.3.1</version>  
52.         </dependency>  
53.         <!--mysql jdbc驱动 -->  
54.         <dependency>  
55.             <groupId>mysql</groupId>  
56.             <artifactId>mysql-connector-java</artifactId>  
57.             <version>${mysql.connector.java.version}</version>  
58.         </dependency>  
59.         <!-- alibaba的druid数据库连接池 -->  
60.         <dependency>  
61.             <groupId>com.alibaba</groupId>  
62.             <artifactId>druid</artifactId>  
63.             <version>1.0.11</version>  
64.         </dependency>  
65.   
66.         <dependency>  
67.             <groupId>org.springframework.boot</groupId>  
68.             <artifactId>spring-boot-starter-web</artifactId>  
69.         </dependency>  
70.   
71.         <!--模板页面-->  
72.         <dependency>  
73.             <groupId>org.springframework.boot</groupId>  
74.             <artifactId>spring-boot-starter-thymeleaf</artifactId>  
75.         </dependency>  
76.         <dependency>  
77.             <groupId>net.sourceforge.nekohtml</groupId>  
78.             <artifactId>nekohtml</artifactId>  
79.             <version>1.9.22</version>  
80.         </dependency>  
81.   
82.         <dependency>  
83.             <groupId>org.springframework.boot</groupId>  
84.             <artifactId>spring-boot-starter-test</artifactId>  
85.             <scope>test</scope>  
86.         </dependency>  
87.     </dependencies>  
88.   
89.     <build>  
90.         <plugins>  
91.             <plugin>  
92.                 <groupId>org.springframework.boot</groupId>  
93.                 <artifactId>spring-boot-maven-plugin</artifactId>  
94.             </plugin>  
95.             <!-- mybatis generator 自动生成代码插件 -->  
96.             <plugin>  
97.                 <groupId>org.mybatis.generator</groupId>  
98.                 <artifactId>mybatis-generator-maven-plugin</artifactId>  
99.                 <version>${mybatis.generator.version}</version>  
100.             </plugin>  
101.         </plugins>  
102.     </build>  
103.   
104.   
105. </project>  

3、mybatis的配置文件 （可以不要需要，因为在application.yml配置了）

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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.   
6. <configuration>  
7.     <settings>  
8.         <!-- changes from the defaults -->  
9.         <setting name="lazyLoadingEnabled" value="false" />  
10.     </settings>  
11.   
12.     <mappers>  
13.         <!--在application.yml配置文件中已经配置的*Mapper.xml,所以这里不需要重复添加了-->  
14.         <!--<mapper resource="mapper/UserMapper.xml" />-->  
15.     </mappers>  
16.   
17. </configuration>  

4、用户实体类xml映射文件 UserMapper.xml

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1. <?xml version="1.0" encoding="UTF-8"?>  
2. <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">  
3. <mapper namespace="com.xuan.mapper.UserMapper">  
4.   
5.     <!-- 查询网校的用户数目 -->  
6.     <select id="getAllUser" resultType="com.xuan.entity.User">  
7.           SELECT * from user  
8.     </select>  
9.       
10. </mapper>  

5、自动生成配置文件 generatorConfig.xml（项目目录下运行命令： mvn mybatis-generator:generate -e ）

注意：generatorConfig.xml配置文件中有些参数笔者是配置在pom.xml里的，另外mysql-connector-java-5.1.38.jar  数据库mysql驱动也不要使用太高的版本（笔者使用6.0.6版本是遇到错误，换成低版本就没事）

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1. <?xml version="1.0" encoding="UTF-8"?>  
2. <!DOCTYPE generatorConfiguration  
3.         PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN"  
4.         "http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd">  
5.   
6. <generatorConfiguration>  
7.     <classPathEntry location="${classPathEntry.mysql.location}" />  
8.   
9.     <context id="mysqlTables" targetRuntime="MyBatis3">  
10.         <jdbcConnection driverClass="com.mysql.jdbc.Driver"  
11.                         connectionURL="jdbc:mysql://127.0.0.1:3306/test?characterEncoding=utf8"  
12.                         userId="xuan" password="123456">  
13.         </jdbcConnection>  
14.   
15.         <javaTypeResolver>  
16.             <property name="forceBigDecimals" value="false" />  
17.         </javaTypeResolver>  
18.   
19.         <javaModelGenerator targetPackage="com.xuan.entity"  
20.                             targetProject="${javaModelGenerator.targetProject}">  
21.             <property name="enableSubPackages" value="true" />  
22.             <property name="trimStrings" value="true" />  
23.         </javaModelGenerator>  
24.   
25.         <sqlMapGenerator targetPackage="mapper"  
26.                          targetProject="${sqlMapGenerator.targetProject}">  
27.             <property name="enableSubPackages" value="true" />  
28.         </sqlMapGenerator>  
29.   
30.         <javaClientGenerator type="XMLMAPPER"  
31.                              targetPackage="com.xuan.mapper" targetProject="${javaClientGenerator.targetProject}">  
32.             <property name="enableSubPackages" value="false" />  
33.         </javaClientGenerator>  
34.   
35.         <!-- 
36.         <table tableName="live_course_channel" domainObjectName="LiveCourseChannel"></table> 
37.  
38.         -->  
39.         <table tableName="video" domainObjectName="Video"></table>  
40.   
41.   
42.     </context>  
43. </generatorConfiguration>  

6、用户实体类：

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1. package com.xuan.entity;  
2.   
3. import java.io.Serializable;  
4.   
5. /** 
6.  * Created by chenqixuan on 17/10/24. 
7.  */  
8. public class User implements Serializable{  
9.     private static final long serialVersionUID = 2120869894112984147L;  
10.   
11.     private Integer id;  
12.   
13.     private String  name;  
14.   
15.     private  Integer age;  
16.   
17.     private String address;  
18.   
19.     public Integer getId() {  
20.         return id;  
21.     }  
22.   
23.     public void setId(Integer id) {  
24.         this.id = id;  
25.     }  
26.   
27.     public String getName() {  
28.         return name;  
29.     }  
30.   
31.     public void setName(String name) {  
32.         this.name = name;  
33.     }  
34.   
35.     public Integer getAge() {  
36.         return age;  
37.     }  
38.   
39.     public void setAge(Integer age) {  
40.         this.age = age;  
41.     }  
42.   
43.     public String getAddress() {  
44.         return address;  
45.     }  
46.   
47.     public void setAddress(String address) {  
48.         this.address = address;  
49.     }  
50. }  

7、dao层是使用@Mapper注解接口代理，以前spring是使用自动扫描

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1. package com.xuan.mapper;  
2.   
3. import com.xuan.entity.User;  
4. import org.apache.ibatis.annotations.Mapper;  
5.   
6. import java.util.List;  
7.   
8. /** 
9.  * Created by chenqixuan on 17/10/24. 
10.  */  
11. @Mapper  
12. public interface UserMapper {  
13.   
14.     public List<User> getAllUser();  
15.   
16. }  

8、controller引用：

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1. package com.xuan.controller;  
2.   
3. import com.xuan.entity.User;  
4. import com.xuan.mapper.UserMapper;  
5. import org.springframework.beans.factory.annotation.Autowired;  
6. import org.springframework.web.bind.annotation.GetMapping;  
7. import org.springframework.web.bind.annotation.RequestMapping;  
8. import org.springframework.web.bind.annotation.RestController;  
9.   
10. import java.util.*;  
11.   
12. /** 
13.  * Created by chenqixuan on 17/10/24. 
14.  */  
15. @RestController  
16. @RequestMapping("/user")  
17. public class UserController {  
18.   
19.     @Autowired  
20.     private UserMapper userMapper;  
21.   
22.     @GetMapping(value="/all")  
23.     public List<User> getAllUser(){  
24.   
25.         return userMapper.getAllUser();  
26.     }  
27.   
28.   
29. }  

9、效果图：

10、目录结构：