Spring Boot 整合Mybatis(步骤讲解) 附源码

转载请标明出处：http://blog.csdn.net/a318199328/article/details/52248552

直接进入正题！！！！

新建Maven项目

 

 

新建项目后目录结构

 

 

 

 

 

新增目录结构src/main/resources

 

新增目录结构后的结构展示

 

 

 

 

新增包结构

 

 

在原pom.xml添加

UTF-8
3.2.9.RELEASE
2.4.4
1.8

 

org.springframework.boot
spring-boot-starter-parent
1.2.5.RELEASE


 


org.springframework.boot
spring-boot-starter-web


org.springframework.boot
spring-boot-starter-thymeleaf


org.springframework.boot
spring-boot-starter-jdbc


org.springframework.boot
spring-boot-starter-actuator

 

org.mybatis
mybatis-spring
1.2.2


org.mybatis
mybatis
3.2.8


org.apache.tomcat
tomcat-jdbc


mysql
mysql-connector-java

 

com.alibaba
fastjson
1.1.43


com.mangofactory
swagger-springmvc
0.9.5

 

com.fasterxml.jackson.core
jackson-annotations


com.fasterxml.jackson.core
jackson-databind


com.fasterxml.jackson.core
jackson-core


 
 



org.springframework.boot
spring-boot-maven-plugin

 

添加编译后有可能出现一下错误

 

解决方案：右键项目找到Maven选项，然后选择Upate Project

 

创建java文件

一．在com.cn.domain包中创建User实体类

public class User {
    private String name;
    private Integer age;
    private String password;
 
    public String getName() {
        return name;
    }
 
    public void setName(String name) {
        this.name = name;
    }
 
    public Integer getAge() {
        return age;
    }
 
    public void setAge(Integer age) {
        this.age = age;
    }
 
    public String getPassword() {
        return password;
    }
 
    public void setPassword(String password) {
        this.password = password;
    }
}
 

 

二．在com.cn.mapper包中创建UserMapper类

import com.cn.domain.User;
 
public interface UserMapper {
    public User findUserInfo(String id);
}

 

三．在src/main/resources包中创建UserMapper.xml

 
  
    select name, age,password from user where uid = #{uid,jdbcType=INTEGER};
  
 

 

四．在com.cn.service包中创建UserService

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import com.cn.domain.User;
import com.cn.mapper.UserMapper;
 
@Service
public class UserService {
 
    @Autowired
    private UserMapper userMapper;
 
    public User getUserInfo(String id){
        User user=userMapper.findUserInfo(id);
        //User user=null;
        return user;
    }
 
}

 

 

五．在com.cn.controller包中创建UserController 类(连接数据库)

import org.apache.log4j.Logger;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import com.cn.domain.User;
import com.cn.service.UserService;
 
@Controller
public class UserController {
 
    private Logger logger = Logger.getLogger(UserController.class);
 
    @Autowired
    private UserService userService;
 
    @RequestMapping("/getUserInfo")
    @ResponseBody
    public User getUserInfo(@RequestParam("id") String id) {
    	System.out.println(id);
        User user = userService.getUserInfo(id);
        if(user!=null){
            System.out.println("user.getName():"+user.getName());
            logger.info("user.getAge():"+user.getAge());
        }
        return user;
    }
}

 

六．在com.cn.servoce包中创建HelloController 类

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
 
@Controller
public class HelloController {
 
    @RequestMapping("/hello")
    public String greeting(@RequestParam(value="name", required=false, defaultValue="World") String name, Model model) {
        model.addAttribute("name", name);
        return "hello";
    }
    
}

 

七．在com.cn包中创建Application 类(运行类)

import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.log4j.Logger;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;
import org.springframework.transaction.PlatformTransactionManager;
 
import javax.sql.DataSource;
 
@EnableAutoConfiguration
@SpringBootApplication
@ComponentScan
@MapperScan("com.cn.mapper")//扫描mapper包下接口
public class Application {
    private static Logger logger = Logger.getLogger(Application.class);
 
    @Bean
    @ConfigurationProperties(prefix="spring.datasource")//数据库中的配置前缀
    public DataSource dataSource() {
        return new org.apache.tomcat.jdbc.pool.DataSource();
    }
 
    @Bean
    public SqlSessionFactory sqlSessionFactoryBean() throws Exception {
 
        SqlSessionFactoryBean sqlSessionFactoryBean = new SqlSessionFactoryBean();
        sqlSessionFactoryBean.setDataSource(dataSource());
 
        PathMatchingResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();
 
        sqlSessionFactoryBean.setMapperLocations(resolver.getResources("classpath:/mybatis/*.xml"));//读取Mapper.xml
 
        return sqlSessionFactoryBean.getObject();
    }
 
    @Bean
    public PlatformTransactionManager transactionManager() {
        return new DataSourceTransactionManager(dataSource());
    }
 
 
    /**
     * Start
     */
    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
        logger.info("SpringBoot Start Success");
    }
 
}

 

八．在src/main/resources创建application.properties(数据库配置)

spring.datasource.url=jdbc:mysql://127.0.0.1:3306/test?useUnicode=true&characterEncoding=gbk&zeroDateTimeBehavior=convertToNull
spring.datasource.username=root
spring.datasource.password=123123
spring.datasource.driver-class-name=com.mysql.jdbc.Driver

#保证没一行后面都不包含空格，否则报错

 

九．在src/main/resources创建log4j.properties（根据自己需要配置）

#config root logger
log4j.rootLogger = INFO,system.out
log4j.appender.system.out=org.apache.log4j.ConsoleAppender
log4j.appender.system.out.layout=org.apache.log4j.PatternLayout
log4j.appender.system.out.layout.ConversionPattern=[Log] %5p[%F:%L]:%m%n
 
#config this Project.file logger
log4j.logger.thisProject.file=INFO,thisProject.file.out
log4j.appender.thisProject.file.out=org.apache.log4j.DailyRollingFileAppender
log4j.appender.thisProject.file.out.File=logContentFile.log
log4j.appender.thisProject.file.out.layout=org.apache.log4j.PatternLayout
 

十．在src/main/resources创建templates(必须)返回页面目录，并在templates下创建hello.html

 

测试：运行Appliaction.java(右键Run As --> Java Appliaction)，再不报错的情况下在浏览器输入：

http://localhost:8080/hello

 

http://localhost:8080/hello?name=xxx

 

http://localhost:8080/getUserInfo?id=1

 

实例下载：http://download.csdn.net/detail/a318199328/9607376

注：由于MyBatis属于一种半自动的ORM框架，所以主要的工作就是配置Mapping映射文件，但是由于手写映射文件很容易出错，所以可利用MyBatis生成器自动生成实体类、DAO接口和Mapping映射文件    Eclipse MyBatis Generator插件和使用说明