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：https://github.com/caicahoqi/ChaoqiIsPrivateLibrary）
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