Spring-boot + Mybatis整合

项目结构图如下：

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下面分步骤一一讲解：
第一步，在pom.xml中添加相应依赖：

 
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
 4.0.0

com.example
spring-boot-sample-helloworld
0.0.1-SNAPSHOT
jar

spring-boot-sample-helloworld
Demo project for Spring Boot


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



    UTF-8
    UTF-8
    1.8



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

    
        org.springframework.boot
        spring-boot-starter-test
        test
    
    
    
            org.mybatis.spring.boot
            mybatis-spring-boot-starter
            1.0.0
    
    
      
        mysql  
        mysql-connector-java  
     



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

第二步，新建application.properties

 spring.datasource.url=jdbc:mysql://127.0.0.1:3306/jeesite
 spring.datasource.username=root
 spring.datasource.password=root
 spring.datasource.driver-class-name=com.mysql.jdbc.Driver
 spring.datasource.max-idle=10
 spring.datasource.max-wait=10000
 spring.datasource.min-idle=5
 spring.datasource.initial-size=5

server.port=8080
 server.session.timeout=10
 server.tomcat.uri-encoding=UTF-8
mybatis-config路径
mybatis.config=classpath:mybatis-config.xml
mapper文件路径
mybatis.mapperLocations=classpath:mappers/*.xml
domain object's package
mybatis.typeAliasesPackage=com.example.springbootsamplehelloworld.bean
 

 package com.example.demo;

import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
 public class Application {
public static void main(String[] args) {
    SpringApplication.run(Application.class, args);
}

}

第三步，创建bean,mapper,service,controller

 package com.example.springbootsamplehelloworld.bean;

import java.util.Date;
public class AppMessage {
 private String id;
private String message;

private Date senddate;

public AppMessage(){
    
}

public String getId() {
    return id;
}

public void setId(String id) {
    this.id = id == null ? null : id.trim();
}

public String getMessage() {
    return message;
}

public void setMessage(String message) {
    this.message = message == null ? null : message.trim();
}

public Date getSenddate() {
    return senddate;
}

public void setSenddate(Date senddate) {
    this.senddate = senddate;
}

}

 package com.example.springbootsamplehelloworld.mapper;

import java.util.List;
import com.example.springbootsamplehelloworld.bean.AppMessage;
public interface AppMessageMapper {
int deleteByPrimaryKey(String id);

int insert(AppMessage record);

int insertSelective(AppMessage record);

AppMessage selectByPrimaryKey(String id);

int updateByPrimaryKeySelective(AppMessage record);

int updateByPrimaryKey(AppMessage record);

List selectAll();

List getMessById(String id);

public void init();

}

 package com.example.springbootsamplehelloworld.service;

import java.util.ArrayList;
 import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
import com.example.springbootsamplehelloworld.bean.AppMessage;
 import com.example.springbootsamplehelloworld.mapper.AppMessageMapper;
@Service
 public class AppMessageService {
@Autowired
private AppMessageMapper mapper;

public List getMessage(){
     List list = new ArrayList();
     list.add(mapper.selectByPrimaryKey("1"));
     //list = mapper.selectAll();
     return list;
}

public List getAllMessage(){
     List list = new ArrayList();
     list = mapper.selectAll();
     return list;
}

public int addMessage(AppMessage appMessage) {
    return mapper.insert(appMessage);
}

public List getMessageById(String id) {
    return mapper.getMessById(id);
}

public int delMessage(String id) {
    return mapper.deleteByPrimaryKey(id);
}

}


 package com.example.springbootsamplehelloworld.controller;

import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.web.bind.annotation.RequestBody;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RequestMethod;
 import org.springframework.web.bind.annotation.RequestParam;
 import org.springframework.web.bind.annotation.RestController;
import com.example.springbootsamplehelloworld.bean.AppMessage;
 import com.example.springbootsamplehelloworld.service.AppMessageService;
@RestController
 @RequestMapping("/appmessage")
 public class APPMessageController {
@Autowired
private AppMessageService service;

@RequestMapping("/getThree")
public List getThreeForMessage(){
    
    List list = service.getMessage();        
    return list;
}

@RequestMapping("/getAll")
public List getAllMessage(){
    
    List list = service.getAllMessage();
    int num = list.size();
    if(null!=list && num>3){
        for (int i = 0; i < num-3; i++) {
            list.remove(0);
        }
    }
    return list;
}

@RequestMapping("/getByID")
public List getMessageById(@RequestParam("id") String id){
    List list = service.getMessageById(id);
    int num = list.size();
    if(null!=list && num>5){
        for (int i = 0; i < num-5; i++) {
            list.remove(0);
        }
    }
    return list;
}

@RequestMapping(value = "/add",method = RequestMethod.POST)
public int addMessage(@RequestBody AppMessage appMessage){
    return service.addMessage(appMessage);
}

@RequestMapping(value="/delMessageById")
public int delMessageById(@RequestParam("id") String id){
        return service.delMessage(id);
}

}

需要注意的地方：
 1，bean中需要有无参构造器(如果存在有参构造器，则编译器不会自动添加无参构造器)


 



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第四步，访问


 



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