springboot+springmvc+mybatis项目整合

2024-07-14 08:39:49

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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

springboot,springmvc,mybatis

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。

springboot,springmvc,mybatis

这里勾选上web

springboot,springmvc,mybatis

这里勾选上MySQL、JDBC和Mybatis点击下一步

springboot,springmvc,mybatis

这里输入项目名和项目路径后点击完成

springboot,springmvc,mybatis

这是新建完成后的项目结构

springboot,springmvc,mybatis

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.Driverspring.datasource.url = jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=utf-8spring.datasource.username = rootspring.datasource.password = 123456# mybatis接口文件位置mybatis.mapper-locations: classpath:mapper/*.xmlmybatis.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: 8080spring: 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.Drivermybatis: 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

springboot,springmvc,mybatis

新建IndexController

springboot,springmvc,mybatis

package com.chaoqi.springboot_test.web;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestMapping;@Controllerpublic class IndexController {　　private static final String INDEX = "index"; @RequestMapping("/show") public String getIndex() {  return INDEX; }}

运行main函数

springboot,springmvc,mybatis

访问页面，成功

springboot,springmvc,mybatis

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;@Servicepublic 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

springboot,springmvc,mybatis

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;@Controllerpublic 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）

springboot,springmvc,mybatis