springboot2.0 基于注解使用mybaties

直接贴代码先：

pom:

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
	<modelVersion>4.0.0</modelVersion>

	<groupId>com.example</groupId>
	<artifactId>demo</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<packaging>jar</packaging>

	<name>demo</name>
	<description>Demo project for Spring Boot</description>

	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>2.0.2.RELEASE</version>
		<relativePath/> <!-- lookup parent from repository -->
	</parent>

	<properties>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
		<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
		<java.version>1.8</java.version>
	</properties>

	<dependencies>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-freemarker</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>
		<dependency>
			<groupId>org.mybatis.spring.boot</groupId>
			<artifactId>mybatis-spring-boot-starter</artifactId>
			<version>1.3.2</version>
		</dependency>

		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-devtools</artifactId>
			<scope>runtime</scope>
		</dependency>
		<dependency>
			<groupId>mysql</groupId>
			<artifactId>mysql-connector-java</artifactId>
			<scope>runtime</scope>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-test</artifactId>
			<scope>test</scope>
		</dependency>
	</dependencies>

	<build>
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
			</plugin>
		</plugins>
	</build>


</project>

application.properties:

# datasource  tomcate-jdbc
spring.datasource.url=jdbc:mysql://localhost:3306/springboot?useUnicode=true&characterEncording=UTF-8
spring.datasource.username=root
spring.datasource.password=root

# freemarker
spring.freemarker.suffix=.html
spring.freemarker.template-loader-path=classpath:/templates

Controller:

package com.example.demo.controller;



import com.example.demo.entity.UserInfo;
import com.example.demo.service.UserInfoService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;

/**
 * Created by  lpw'ASUS on 2018/6/4.
 */
@Controller
@RequestMapping("/user")
public class UserInfoController {

    @Autowired
    private UserInfoService userInfoService;

    @RequestMapping("index")
   public String index(){
        return "index";
   }

    @RequestMapping("getUser")
    public  String getUser(Model model,@RequestParam String id){
        int id1 =  Integer.valueOf(id);
        UserInfo userInfo = userInfoService.getUserInfo(id1);

        System.out.println("====="+userInfo);

        model.addAttribute("userInfo",userInfo);
        return "index";
    }


}

service层：

package com.example.demo.service;


import com.example.demo.entity.UserInfo;

/**
 * Created by  lpw'ASUS on 2018/6/4.
 */
public interface UserInfoService {

    UserInfo getUserInfo(int id);

}

package com.example.demo.service;


import com.example.demo.dao.UserInfoDao;
import com.example.demo.entity.UserInfo;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

/**
 * Created by  lpw'ASUS on 2018/6/4.
 */
@Service
public class UserInfoServiceImpl implements UserInfoService {
    @Autowired
    private UserInfoDao userInfoDao;

    @Override
    public UserInfo getUserInfo(int id) {
        return userInfoDao.getUserInfo(id);
    }

}

在实现类里面后来发现@Autowired发现报错，说不能注入，我用的idea，没有理他可以用。

dao层：

package com.example.demo.dao;

import com.example.demo.entity.UserInfo;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Result;
import org.apache.ibatis.annotations.Results;
import org.apache.ibatis.annotations.Select;

/**JpaRepository<对象,主键类型>
 * Created by  lpw'ASUS on 2018/5/31.
 */
@Mapper
public interface UserInfoDao{

     @Select("select * from user_info where id = #{id}")
     @Results(
             value = {
                     @Result(column = "id",property = "id"),
                     @Result(column = "name",property = "name"),
                     @Result(column = "sex",property = "sex")
             }
     )
     public UserInfo getUserInfo(Integer id);

}

bean：

package com.example.demo.entity;


/**
 * Created by  lpw'ASUS on 2018/5/30.
 */

public class UserInfo {

    private Integer id;
    private String name;
    private String sex;

    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }
    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }
    public String getSex() {
        return sex;
    }

    public void setSex(String sex) {
        this.sex = sex;
    }

    @Override
    public String toString() {
        return "UserInfo{" +
                "id=" + id +
                ", name='" + name + '\'' +
                ", sex='" + sex + '\'' +
                '}';
    }
}

html：

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<h1>index界面</h1>
    <a href="/user/getUser?id=3">这是个超链接</a>
<#if userInfo??>
    用户名：${userInfo.name}
</#if>

</body>
</html>