springboot+springmvc+mybatis项目整合

介绍：

上篇给大家介绍了ssm多模块项目的搭建，在搭建过程中spring整合springmvc和mybatis时会有很多的东西需要我们进行配置，这样不仅浪费了时间，也比较容易出错，由于这样问题的产生，Pivotal团队提供了一款全新的框架，该框架使用了特定的方式来进行配置，从而使开发人员不再需要定义样板化的配置。通过这种方式，Spring Boot致力于在蓬勃发展的快速应用开发领域(rapid application development)成为领导者。

特点:

1. 创建独立的Spring应用程序
2. 嵌入的Tomcat，无需部署WAR文件
3. 简化Maven配置
4. 自动配置Spring
5. 提供生产就绪型功能，如指标，健康检查和外部配置
6. 绝对没有代码生成和对XML没有要求配置
(以上大部分内容摘自百度百科)

 ok，关于springboot的讲解就到这里大家想了解的更详细可以自行百度。

搭建springboot项目我推荐大家用idea或者sts（spring tool suite spring公司自己研发的一款编辑器），我现在用的是idea，所以接下来我是用idea搭建项目的

 一、创建项目

填写完Group和Atrifact后点击下一步，这里我选择的是jar，因为官方文档推荐的是打包成JAR，所以这里就不过多解释了。


这里勾选上web

这里勾选上MySQL、JDBC和Mybatis点击下一步

这里输入项目名和项目路径后点击完成

这是新建完成后的项目结构

 二、添加pom.xml依赖

因为springboot不推荐使用jsp做页面，如果想要使用就必需的添加jsp的依赖

<?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.chaoqi</groupId>
<artifactId>springboot_demo2</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>

<name>springboot_demo2</name>
<description>Demo project for Spring Boot</description>

<parent>
 <groupId>org.springframework.boot</groupId>
 <artifactId>spring-boot-starter-parent</artifactId>
 <version>2.0.0.RELEASE</version>
 <relativePath/>
</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-jdbc</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>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>
 <!--添加jsp依赖 -->
 <dependency>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-starter-tomcat</artifactId>
 </dependency>
 <dependency>
  <groupId>org.apache.tomcat.embed</groupId>
  <artifactId>tomcat-embed-jasper</artifactId>
 </dependency>
</dependencies>

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

</project>

三、springboot整合springmvc

因为在创建项目的时候我们选择了mybatis和jdbc所以在这里也要把他们两也给配置进去

编辑application.properties

# 页面默认前缀目录
spring.mvc.view.prefix=/WEB-INF/jsp/
# 响应页面默认后缀
spring.mvc.view.suffix=.jsp

#开发配置
spring.datasource.driverClassName = com.mysql.jdbc.Driver
spring.datasource.url = jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=utf-8
spring.datasource.username = root
spring.datasource.password = 123456

# mybatis接口文件位置
mybatis.mapper-locations: classpath:mapper/*.xml
mybatis.type-aliases-package: com.chaoqi.springboot_demo2.domain

如果大家习惯用application.yml那也可以用，但是用application.yml在第一次启动项目的时候一定要maven clean一下，不然会报错。

server:
port: 8080

spring:
mvc:
view:
 prefix: /WEB-INF/jsp/
 suffix: .jsp
datasource:
url: jdbc:mysql://localhost:3306/test?characterEncoding=UTF-8&useUnicode=true&useSSL=false
username: root
password: 123456
driver-class-name: com.mysql.jdbc.Driver

mybatis:
mapper-locations: classpath:mapping/*.xml
type-aliases-package: com.chaoqi.springboot_demo2.domain

编辑完application.properties之后再src/mian下创建webapp目录，结构如下

新建IndexController

package com.chaoqi.springboot_test.web;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

@Controller
public class IndexController {
private static final String INDEX = "index";
@RequestMapping("/show")
public String getIndex() {
 return INDEX;
}
}

运行main函数

访问页面，成功

四、springboot整合mybatis

创建数据库表

-- ----------------------------
-- Table structure for music_info
-- ----------------------------
DROP TABLE IF EXISTS `music_info`;
CREATE TABLE `music_info` (
`id` int(10) NOT NULL AUTO_INCREMENT COMMENT '主键id',
`singer_name` varchar(100) NOT NULL COMMENT '歌手名',
`music_size` varchar(100) NOT NULL COMMENT '歌曲大小',
`music_name` varchar(100) NOT NULL COMMENT '歌曲名',
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=4 DEFAULT CHARSET=utf8;

-- ----------------------------
-- Records of music_info
-- ----------------------------
INSERT INTO `music_info` VALUES ('1', '小三', '3.2M', '起风了');
INSERT INTO `music_info` VALUES ('2', '刘德华', '3.0M', '忘情水');
INSERT INTO `music_info` VALUES ('3', '猪点点', '5.0M', '会写程序的小猪');

创建pojo

package com.chaoqi.springboot_test.dao.domain;

public class MusicInfo {
// 主键id
private Integer id;

// 歌手名
private String singerName;

// 歌曲大小
private String musicSize;

// 歌曲名
private String musicName;

/**
 * 获取 主键id music_info.id
 *
 * @return 主键id
 */
public Integer getId() {
 return id;
}

/**
 * 设置 主键id music_info.id
 *
 * @param id 主键id
 */
public void setId(Integer id) {
 this.id = id;
}

/**
 * 获取 歌手名 music_info.singer_name
 *
 * @return 歌手名
 */
public String getSingerName() {
 return singerName;
}

/**
 * 设置 歌手名 music_info.singer_name
 *
 * @param singerName 歌手名
 */
public void setSingerName(String singerName) {
 this.singerName = singerName == null ? null : singerName.trim();
}

/**
 * 获取 歌曲大小 music_info.music_size
 *
 * @return 歌曲大小
 */
public String getMusicSize() {
 return musicSize;
}

/**
 * 设置 歌曲大小 music_info.music_size
 *
 * @param musicSize 歌曲大小
 */
public void setMusicSize(String musicSize) {
 this.musicSize = musicSize == null ? null : musicSize.trim();
}

/**
 * 获取 歌曲名 music_info.music_name
 *
 * @return 歌曲名
 */
public String getMusicName() {
 return musicName;
}

/**
 * 设置 歌曲名 music_info.music_name
 *
 * @param musicName 歌曲名
 */
public void setMusicName(String musicName) {
 this.musicName = musicName == null ? null : musicName.trim();
}

@Override
public String toString() {
 return "MusicInfo{" +
   "id=" + id +
   ", singerName='" + singerName + '\'' +
   ", musicSize='" + musicSize + '\'' +
   ", musicName='" + musicName + '\'' +
   '}';
}
}

创建mapper.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.chaoqi.springboot_test.dao.mapper.MusicInfoMapper">
<resultMap id="BaseResultMap" type="com.chaoqi.springboot_test.dao.domain.MusicInfo">
<id column="id" jdbcType="INTEGER" property="id" />
<result column="singer_name" jdbcType="VARCHAR" property="singerName" />
<result column="music_size" jdbcType="VARCHAR" property="musicSize" />
<result column="music_name" jdbcType="VARCHAR" property="musicName" />
</resultMap>
</mapper>

创建mapper

package com.chaoqi.springboot_test.dao.mapper;

import com.chaoqi.springboot_test.dao.domain.MusicInfo;
import org.apache.ibatis.annotations.ResultMap;
import org.apache.ibatis.annotations.Select;

import java.util.List;

public interface MusicInfoMapper {
@ResultMap("BaseResultMap")
@Select("select * from music_info")
List<MusicInfo> selectAll(MusicInfo musicInfo);
}

service接口

package com.chaoqi.springboot_test.service;

import com.chaoqi.springboot_test.dao.domain.MusicInfo;
import java.util.List;
public interface MusicInfoService {

public List<MusicInfo> getMusicInfo(MusicInfo musicInfo);
}

service实现类

package com.chaoqi.springboot_test.service.impl;

import com.chaoqi.springboot_test.dao.domain.MusicInfo;
import com.chaoqi.springboot_test.dao.mapper.MusicInfoMapper;
import com.chaoqi.springboot_test.service.MusicInfoService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

@Service
public class MusicInfoServiceImpl implements MusicInfoService {

@Autowired
private MusicInfoMapper musicInfoMapper;

@Override
public List<MusicInfo> getMusicInfo(MusicInfo musicInfo) {
 List<MusicInfo> musicInfos = musicInfoMapper.selectAll(null);
 return musicInfos;
}
}

创建完成后的结构如下

编辑indexController

package com.chaoqi.springboot_test.web;

import com.chaoqi.springboot_test.dao.domain.MusicInfo;
import com.chaoqi.springboot_test.service.MusicInfoService;
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.ResponseBody;

import java.util.List;

@Controller
public class IndexController {

private static final String INDEX = "index";
@Autowired
private MusicInfoService musicInfoService;

@RequestMapping("/show")
public String getIndex() {
 return INDEX;
}

@RequestMapping("/music")
@ResponseBody
public List<MusicInfo> getMusicInfo(MusicInfo musicInfo) {
 List<MusicInfo> musicInfoList = musicInfoService.getMusicInfo(null);
 return musicInfoList;
}
}

给SpringbootTestApplication类加上注解@MapperScan("com.chaoqi.springboot_test.dao.mapper")

package com.chaoqi.springboot_test;

import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@SpringBootApplication
@MapperScan("com.chaoqi.springboot_test.dao.mapper")
public class SpringbootTestApplication {

public static void main(String[] args) {
 SpringApplication.run(SpringbootTestApplication.class, args);
}
}

运行项目，成功，springboot+springmvc+mybatis整合完成（源码下载地址）

来源：http://www.cnblogs.com/caichaoqi/p/8580521.html