Spring+SpringMVC+Mybatis就是大名頂頂的SSM了。

這里我們使用IDEA的SpringBoot和版本控制器MAVEN構建一個SSM的demo。

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介紹：

　　在搭建過程中spring整合springmvc和mybatis時會有很多的東西需要我們進行配置，這樣不僅浪費了時間，也比較容易出錯，由于這樣問題的產生，Pivotal團隊提供了一款全新的框架Spring Boot，該框架使用了特定的方式來進行配置，從而使開發人員不再需要定義樣板化的配置。通過這種方式，Spring Boot致力于在蓬勃發展的快速應用開發領域(rapid application development)成為領導者。

特點:

1. 創建獨立的Spring應用程序

2. 嵌入的Tomcat，無需部署WAR文件

3. 簡化Maven配置

4. 自動配置Spring

5. 提供生產就緒型功能，如指標，健康檢查和外部配置

6. 絕對沒有代碼生成和對XML沒有要求配置

(以上大部分內容摘自百度百科)

?ok，關于springboot的講解就到這里大家想了解的更詳細可以自行百度。

搭建springboot項目我推薦大家用idea或者sts（spring tool suite spring公司自己研發的一款編輯器），我現在用的是idea，所以接下來我是用idea搭建項目的

?一、創建項目

?

?填寫完Group和Atrifact后點擊下一步，這里我選擇的是jar，因為官方文檔推薦的是打包成JAR，所以這里就不過多解釋了。

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?這里勾選上web

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?這里勾選上MySQL、JDBC和Mybatis點擊下一步

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這里輸入項目名和項目路徑后點擊完成

這是新建完成后的項目結構

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?二、添加pom.xml依賴

因為springboot不推薦使用jsp做頁面，如果想要使用就必需的添加jsp的依賴

<?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依賴 --><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>

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三、springboot整合springmvc

因為在創建項目的時候我們選擇了mybatis和jdbc所以在這里也要把他們兩也給配置進去

編輯application.properties

# 頁面默認前綴目錄
spring.mvc.view.prefix=/WEB-INF/jsp/
# 響應頁面默認后綴
spring.mvc.view.suffix=.jsp

#數據源開發配置
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

如果大家習慣用application.yml那也可以用，但是用application.yml在第一次啟動項目的時候一定要maven clean一下，不然會報錯。

server:port: 8080spring:mvc:view:prefix: /WEB-INF/jsp/suffix: .jspdatasource:url: jdbc:mysql://localhost:3306/test?characterEncoding=UTF-8&useUnicode=true&useSSL=falseusername: rootpassword: 123456driver-class-name: com.mysql.jdbc.Drivermybatis:mapper-locations: classpath:mapping/*.xmltype-aliases-package: com.chaoqi.springboot_demo2.domain

編輯完application.properties之后再src/mian下創建webapp目錄，結構如下

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新建IndexController

?

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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;} }

?

運行main函數

訪問頁面，成功

?

四、springboot整合mybatis

?創建數據庫表

-- ---------------------------- -- Table structure for music_info -- ---------------------------- DROP TABLE IF EXISTS `music_info`; CREATE TABLE `music_info` (`id` int(10) NOT NULL AUTO_INCREMENT COMMENT '主鍵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', '起風了'); INSERT INTO `music_info` VALUES ('2', '劉德華', '3.0M', '忘情水'); INSERT INTO `music_info` VALUES ('3', '豬點點', '5.0M', '會寫程序的小豬');

創建pojo

package com.chaoqi.springboot_test.dao.domain;public class MusicInfo {// 主鍵idprivate Integer id;// 歌手名private String singerName;// 歌曲大小private String musicSize;// 歌曲名private String musicName;/*** 獲取 主鍵id music_info.id** @return 主鍵id*/public Integer getId() {return id;}/*** 設置 主鍵id music_info.id** @param id 主鍵id*/public void setId(Integer id) {this.id = id;}/*** 獲取 歌手名 music_info.singer_name** @return 歌手名*/public String getSingerName() {return singerName;}/*** 設置 歌手名 music_info.singer_name** @param singerName 歌手名*/public void setSingerName(String singerName) {this.singerName = singerName == null ? null : singerName.trim();}/*** 獲取 歌曲大小 music_info.music_size** @return 歌曲大小*/public String getMusicSize() {return musicSize;}/*** 設置 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();}/*** 獲取 歌曲名 music_info.music_name** @return 歌曲名*/public String getMusicName() {return musicName;}/*** 設置 歌曲名 music_info.music_name** @param musicName 歌曲名*/public void setMusicName(String musicName) {this.musicName = musicName == null ? null : musicName.trim();}@Overridepublic String toString() {return "MusicInfo{" +"id=" + id +", singerName='" + singerName + '\'' +", musicSize='" + musicSize + '\'' +", musicName='" + musicName + '\'' +'}';} }

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創建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>

創建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實現類

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 {@Autowiredprivate MusicInfoMapper musicInfoMapper;@Overridepublic List<MusicInfo> getMusicInfo(MusicInfo musicInfo) {List<MusicInfo> musicInfos = musicInfoMapper.selectAll(null);return musicInfos;} }

創建完成后的結構如下

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編輯indexController

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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";@Autowiredprivate MusicInfoService musicInfoService;@RequestMapping("/show")public String getIndex() {return INDEX;}@RequestMapping("/music")@ResponseBodypublic List<MusicInfo> getMusicInfo(MusicInfo musicInfo) {List<MusicInfo> musicInfoList = musicInfoService.getMusicInfo(null);return musicInfoList;} }

給SpringbootTestApplication類加上注解@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);} }

運行項目，成功，springboot+springmvc+mybatis整合完成（源碼下載地址：https://github.com/caicahoqi/ChaoqiIsPrivateLibrary）

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