对于多表多条件的分页查询，spring boot稍微有点欠缺，于是楼主研究一下把mybatis集成进来，这个过程并不复杂。
接上篇，
首先，把druid连接池Jar包的引用添加到pom.xml文件里
com.alibaba
druid
1.1.0
如果你在上篇的搭建中有把mybatis jar包引用路径屏蔽掉的话，在这里也要放开。
展示一下最终的pom.xml文件
4.0.0
com.example
demo
0.0.1-SNAPSHOT
jar
demo
Demo project for Spring Boot
org.springframework.boot
spring-boot-starter-parent
2.0.2.RELEASE
UTF-8
UTF-8
1.8
org.springframework.boot
spring-boot-starter-data-jpa
org.springframework.boot
spring-boot-starter-web
org.mybatis.spring.boot
mybatis-spring-boot-starter
1.3.2
mysql
mysql-connector-java
runtime
org.springframework.boot
spring-boot-starter-test
test
com.alibaba
druid
1.1.0
org.springframework.boot
spring-boot-maven-plugin
jar包引入完后，我们来把配置文件修改一下，把mybatis集成进来到application.yml配置文件里来
#默认使用配置
spring:
profiles:
active: dev
#公共配置与profiles选择无关
mybatis:
typeAliasesPackage: com.example.demo.model
mapperLocations: classpath:mapper/*.xml
---
#开发配置
spring:
profiles: dev
datasource:
url: jdbc:mysql://localhost:3306/test
username: root
password: 123456
driver-class-name: com.mysql.jdbc.Driver
# 使用druid数据源
type: com.alibaba.druid.pool.DruidDataSource
中间加的两行代码即为mybatis的引用，在这里忍不住要说一下，spring boot的配置方式是真的简单，比SSM简单多了。这样在框架上算是集成完了，接下来添加上其他几种需要的文件，来测试一下。
用mybatis的一大好处就是实体类，mapper和XML文件可以自动生成，关于mybatis的自动生成，可以参考一下这篇博文http://blog.csdn.net/zhshulin/article/details/23912615
上面我把我已经生成好的文件贴一下
UserMapper文件
package com.example.demo.mapper;
import com.example.demo.model.User;
import org.springframework.stereotype.Repository;
public interface UserMapper {
int deleteByPrimaryKey(Integer id);
int insert(User record);
int insertSelective(User record);
User selectByPrimaryKey(Integer id);
int updateByPrimaryKeySelective(User record);
int updateByPrimaryKey(User record);
}
UserMapper.xml
id, userName, password, age
delete from User
where id = #{id,jdbcType=INTEGER}
insert into User (id, userName, password,
age)
values (#{id,jdbcType=INTEGER}, #{userName,jdbcType=VARCHAR}, #{password,jdbcType=VARCHAR},
#{age,jdbcType=INTEGER})
insert into User
id,
userName,
password,
age,
#{id,jdbcType=INTEGER},
#{userName,jdbcType=VARCHAR},
#{password,jdbcType=VARCHAR},
#{age,jdbcType=INTEGER},
update User
userName = #{userName,jdbcType=VARCHAR},
password = #{password,jdbcType=VARCHAR},
age = #{age,jdbcType=INTEGER},
where id = #{id,jdbcType=INTEGER}
update User
set userName = #{userName,jdbcType=VARCHAR},
password = #{password,jdbcType=VARCHAR},
age = #{age,jdbcType=INTEGER}
where id = #{id,jdbcType=INTEGER}
实体类User
package com.example.demo.model;
public class User {
private Integer id;
private String userName;
private String password;
private Integer age;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public Integer getAge() {
return age;
}
public void setAge(Integer age) {
this.age = age;
}
}
启动文件DemoApplication.java修改一下，让其扫描dao层接口。
package com.example.demo;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.web.servlet.support.SpringBootServletInitializer;
@SpringBootApplication
@MapperScan("com.example.demo.mapper")
public class DemoApplication extends SpringBootServletInitializer{
public static void main(String[] args) {
SpringApplication.run(DemoApplication.class, args);
}
}
UserController
package com.example.demo.controller;
import com.example.demo.model.User;
import com.example.demo.service.UserService;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
@Controller
@RequestMapping("/user")
public class UserController {
@Resource
private UserService userService;
@RequestMapping("/findUser")
@ResponseBody
public User toIndex(HttpServletRequest request, Model model){
int userId = Integer.parseInt(request.getParameter("id"));
User user = this.userService.getUserById(userId);
return user;
}
}
UserService
package com.example.demo.service;
import com.example.demo.mapper.UserMapper;
import com.example.demo.model.User;
import org.springframework.stereotype.Service;
import javax.annotation.Resource;
@Service("userService")
public class UserService {
@Resource
private UserMapper userMapper;
public User getUserById(int userId) {
return userMapper.selectByPrimaryKey(userId);
}
public boolean addUser(User record){
boolean result = false;
try {
userMapper.insertSelective(record);
result = true;
} catch (Exception e) {
e.printStackTrace();
}
return result;
}
}
打开你的浏览器，访问http://localhost:8080/user/findUser?id=1
image.png
这样，就把mybatis集成进来了。