使用maven+springboot+springmvc+mybaits-spring+mybatis-generator开发

使用springboot+springmvc+mybatis-generator开发web程序，也算是自己参考网上的知识自己写出来的吧，里面还很多东西值得深究学习



使用IDEA和MAVEN新建springboot项目：具体怎么新建网上很多
使用maven就看一下pom.xml文件

<?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.practice</groupId>
<artifactId>SSM</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>jar</packaging>

<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.3.6.RELEASE</version>
</parent>

<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<start-class>com.practice.App</start-class>
<java.version>1.7</java.version>
<lombok.version>1.14.8</lombok.version>
<log4jdbc.log4j2.version>1.16</log4jdbc.log4j2.version>
<rest.assured.version>2.3.3</rest.assured.version>
</properties>

<dependencies>
<!--MG依赖-->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.2.8</version>
</dependency>
<dependency>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-core</artifactId>
<version>1.3.3</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-maven-plugin</artifactId>
<version>1.3.3</version>
<scope>test</scope>
</dependency>
<!--druid数据库连接池-->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>1.0.26</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.38</version>
</dependency>
<!--springboot依赖-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jdbc</artifactId>
</dependency>
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>${lombok.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.bgee.log4jdbc-log4j2</groupId>
<artifactId>log4jdbc-log4j2-jdbc4.1</artifactId>
<version>${log4jdbc.log4j2.version}</version>
</dependency>
<!--springboottest依赖-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<!-- Springboot 热部署 -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<version>1.3.6.RELEASE</version>
<optional>true</optional>
</dependency>
<dependency>
<groupId>com.jayway.restassured</groupId>
<artifactId>rest-assured</artifactId>
<version>${rest.assured.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>4.2.7.RELEASE</version>
<scope>test</scope>
</dependency>
<!-- https://mvnrepository.com/artifact/com.alibaba/fastjson -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.2.21</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-autoconfigure</artifactId>
<version>1.3.6.RELEASE</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.mybatis.spring.boot/mybatis-spring-boot-starter -->
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>1.1.1</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.mybatis/mybatis -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.4.1</version>
</dependency>

<!-- mybatis 分页插件 -->
<dependency>
<groupId>com.github.pagehelper</groupId>
<artifactId>pagehelper</artifactId>
<version>4.1.6</version>
</dependency>
</dependencies>
<build>
<plugins>
<!--MG的插件-->
<plugin>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-maven-plugin</artifactId>
<version>1.3.3</version>
<configuration>
<verbose>true</verbose>
<overwrite>true</overwrite>
</configuration>
<dependencies>
<!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java 配置这个依赖主要是为了等下在配置MG的时候可以不用配置classPathEntry这样的一个属性，避免
代码的耦合度太高 -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.38</version>
</dependency>
</dependencies>
</plugin>
<!--springboot的插件-->
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<dependencies>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>springloaded</artifactId>
<version>${spring-loaded.version}</version>
</dependency>
</dependencies>
</plugin>
</plugins>
</build>

</project>

修改springboot的配置文件，这里一共有四个配置文件：application.properties（默认读取）、application-dev.properties（开发环境）、application-prod.properties（生成环境）、application-test.properties（测试环境）
默认会读取resource目录下的application.properties，内容如下

spring.thymeleaf.cache=false
logging.level.jdbc=OFF
logging.level.jdbc.sqltiming=error
logging.level.jdbc.resultsettable=error
#申明使用哪个配置文件
spring.profiles.active=dev

通过spring.profiles.active=dev这个属性来控制具体使用哪个配置（dev,prod,test）.
以application-dev.properties（开发环境）为例，配置如下：

#数据库配置
spring.datasource.type=com.alibaba.druid.pool.DruidDataSource
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.url=jdbc:mysql://127.0.0.1:3306/ssm
spring.datasource.username=root
spring.datasource.password=root
# 下面为连接池的补充设置，应用到上面所有数据源中# 初始化大小，最小，最大
spring.datasource.initialSize=5
spring.datasource.minIdle=5
spring.datasource.maxActive=20
# 配置获取连接等待超时的时间
spring.datasource.maxWait=60000
# 配置间隔多久才进行一次检测，检测需要关闭的空闲连接，单位是毫秒
spring.datasource.timeBetweenEvictionRunsMillis=60000
# 配置一个连接在池中最小生存的时间，单位是毫秒
spring.datasource.minEvictableIdleTimeMillis=300000
spring.datasource.validationQuery=SELECT 1 FROM DUAL
spring.datasource.testWhileIdle=true
spring.datasource.testOnBorrow=false
spring.datasource.testOnReturn=false
# 打开PSCache，并且指定每个连接上PSCache的大小
spring.datasource.poolPreparedStatements=true
spring.datasource.maxPoolPreparedStatementPerConnectionSize=20
# 配置监控统计拦截的filters，去掉后监控界面sql无法统计，'wall'用于防火墙
spring.datasource.filters=stat,wall,log4j
# 通过connectProperties属性来打开mergeSql功能；慢SQL记录
spring.datasource.connectionProperties=druid.stat.mergeSql=true;druid.stat.slowSqlMillis=5000
# 合并多个DruidDataSource的监控数据
#spring.datasource.useGlobalDataSourceStat=true

#视图模型
spring.thymeleaf.prefix=classpath:/templates/
spring.thymeleaf.suffix=.html
spring.thymeleaf.cache=false
spring.thymeleaf.mode=HTML5
spring.thymeleaf.encoding=UTF-8
spring.thymeleaf.content-type=text/html
spring.thymeleaf.check-template-location=true

主要是数据源的配置，这里使用druid数据源，然后通过DruidDataSourceConfig.java读取数据源的配置：

/*
* Copyright (c) 2016 www.bsfit.com.cn All Rights Reserved.
*/
package com.practice.cfg;

import com.alibaba.druid.pool.DruidDataSource;
import com.github.pagehelper.PageHelper;
import org.apache.ibatis.plugin.Interceptor;
import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.bind.RelaxedPropertyResolver;
import org.springframework.context.ApplicationContextException;
import org.springframework.context.EnvironmentAware;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.env.Environment;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;
import org.springframework.transaction.PlatformTransactionManager;
import org.springframework.transaction.annotation.EnableTransactionManagement;
import org.springframework.util.StringUtils;

import java.sql.SQLException;
import java.util.Arrays;
import java.util.Properties;

/**
* @author: YeJunwei  Date: 2016/12/2 Time: 15:07
*/
@Configuration
@EnableTransactionManagement
@MapperScan(value = "com.practice.mapper")
public class DruidDataSourceConfig implements EnvironmentAware {

private Environment environment;
private RelaxedPropertyResolver propertyResolver;

@Override
public void setEnvironment(Environment environment) {
this.environment = environment;
this.propertyResolver = new RelaxedPropertyResolver(environment, "spring.datasource.");
}

//注册dataSource
@Bean(initMethod = "init", destroyMethod = "close")
public DruidDataSource dataSource() throws SQLException {
if (StringUtils.isEmpty(propertyResolver.getProperty("url"))) {
System.out.println("Your database connection pool configuration is incorrect!"
+ " Please check your Spring profile, current profiles are:"
+ Arrays.toString(environment.getActiveProfiles()));
throw new ApplicationContextException(
"Database connection pool is not configured correctly");
}
DruidDataSource druidDataSource = new DruidDataSource();
druidDataSource.setDriverClassName(propertyResolver.getProperty("driver-class-name"));
druidDataSource.setUrl(propertyResolver.getProperty("url"));
druidDataSource.setUsername(propertyResolver.getProperty("username"));
druidDataSource.setPassword(propertyResolver.getProperty("password"));
druidDataSource.setInitialSize(Integer.parseInt(propertyResolver.getProperty("initialSize")));
druidDataSource.setMinIdle(Integer.parseInt(propertyResolver.getProperty("minIdle")));
druidDataSource.setMaxActive(Integer.parseInt(propertyResolver.getProperty("maxActive")));
druidDataSource.setMaxWait(Integer.parseInt(propertyResolver.getProperty("maxWait")));
druidDataSource.setTimeBetweenEvictionRunsMillis(Long.parseLong(propertyResolver.getProperty("timeBetweenEvictionRunsMillis")));
druidDataSource.setMinEvictableIdleTimeMillis(Long.parseLong(propertyResolver.getProperty("minEvictableIdleTimeMillis")));
druidDataSource.setValidationQuery(propertyResolver.getProperty("validationQuery"));
druidDataSource.setTestWhileIdle(Boolean.parseBoolean(propertyResolver.getProperty("testWhileIdle")));
druidDataSource.setTestOnBorrow(Boolean.parseBoolean(propertyResolver.getProperty("testOnBorrow")));
druidDataSource.setTestOnReturn(Boolean.parseBoolean(propertyResolver.getProperty("testOnReturn")));
druidDataSource.setPoolPreparedStatements(Boolean.parseBoolean(propertyResolver.getProperty("poolPreparedStatements")));
druidDataSource.setMaxPoolPreparedStatementPerConnectionSize(Integer.parseInt(propertyResolver.getProperty("maxPoolPreparedStatementPerConnectionSize")));
druidDataSource.setFilters(propertyResolver.getProperty("filters"));
return druidDataSource;
}

@Bean
public SqlSessionFactory sqlSessionFactory() throws Exception {
SqlSessionFactoryBean sqlSessionFactoryBean = new SqlSessionFactoryBean();
sqlSessionFactoryBean.setDataSource(dataSource());
//mybatis分页
PageHelper pageHelper = new PageHelper();
Properties props = new Properties();
props.setProperty("dialect", "mysql");
props.setProperty("reasonable", "true");
props.setProperty("supportMethodsArguments", "true");
props.setProperty("returnPageInfo", "check");
props.setProperty("params", "count=countSql");
pageHelper.setProperties(props); //添加插件
sqlSessionFactoryBean.setPlugins(new Interceptor[]{pageHelper});
PathMatchingResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();
sqlSessionFactoryBean.setMapperLocations(resolver.getResources("classpath:com/practice/sqlmap/*.xml"));
return sqlSessionFactoryBean.getObject();
}

@Bean
public PlatformTransactionManager transactionManager() throws SQLException {
return new DataSourceTransactionManager(dataSource());
}
}

这里因为后面要用到mybatis-generator和mybatise-spring集成所以需要sqlSession，这里比较重要的就是这里要指定使用的xml的位置和使用@MapperScan(value = “com.practice.mapper”)注解来扫描与xml相对应的mapper接口：

sqlSessionFactoryBean.setMapperLocations(resolver.getResources("classpath:com/practice/sqlmap/*.xml"));

1
3，使用mybatis-generator自动生成代码，在pom文件中添加了MG的插件所以这里配置一下MG的配置文件就可以，放在resource目录下：generatorConfig.properties，generatorConfig.xml。
先新建user表：

DROP TABLE IF EXISTS `user`;
CREATE TABLE `user` (
`id` varchar(50) NOT NULL,
`name` varchar(255) DEFAULT NULL,
`age` int(50) DEFAULT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

generatorConfig.xml：

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE generatorConfiguration
PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN"
"http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd">

<generatorConfiguration>
<properties resource="generatorConfig.properties"/>

<context id="ssm" targetRuntime="MyBatis3">
<plugin type="org.mybatis.generator.plugins.EqualsHashCodePlugin" />
<plugin type="org.mybatis.generator.plugins.SerializablePlugin" />
<plugin type="org.mybatis.generator.plugins.CaseInsensitiveLikePlugin" />
<!-- <plugin type="org.mybatis.generator.plugins.ToStringPlugin"></plugin> -->
<commentGenerator>
<property name="suppressDate" value="true" />
<property name="suppressAllComments" value="true" />
</commentGenerator>
<!--
<jdbcConnection driverClass="oracle.jdbc.driver.OracleDriver" connectionURL="jdbc:oracle:thin:@10.100.1.20:1521:db1"
userId="rams_test" password="bangsun">
</jdbcConnection>
-->
<jdbcConnection driverClass="${driver}"
connectionURL="${url}" userId="${username}" password="${password}">
</jdbcConnection>

<javaTypeResolver>
<property name="forceBigDecimals" value="false" />
</javaTypeResolver>

<javaModelGenerator targetPackage="com.practice.pojo" targetProject="src/main/java">
<property name="constructorBased" value="true" />
<property name="enableSubPackages" value="true" />
<property name="trimStrings" value="true" />
</javaModelGenerator>

<sqlMapGenerator targetPackage="com.practice.sqlmap" targetProject="src/main/resources">
<property name="enableSubPackages" value="true" />
</sqlMapGenerator>

<javaClientGenerator type="XMLMAPPER" targetPackage="com.practice.mapper"
targetProject="src/main/java">
<property name="enableSubPackages" value="true" />
</javaClientGenerator>

<table schema="mybatis" tableName="user" domainObjectName="User">
<property name="constructorBased" value="true" />
<property name="useActualColumnNames" value="false" />
<property name="ignoreQualifiersAtRuntime" value="true" />
</table>
</context>
</generatorConfiguration>

generatorConfig.properties：

driver=com.mysql.jdbc.Driver
url=jdbc:mysql://127.0.0.1:3306/ssm
username=root
password=root

配置好之后双击，就会在指定目录生成代码了。



然后就是编写controller和service了：
IUserService.java：

package com.practice.service;

import com.practice.pojo.User;
import org.springframework.stereotype.Component;
import org.springframework.stereotype.Service;

/**
* @author: YeJunwei  Date: 2016/12/5 Time: 10:54
*/
public interface IUserService {
User getUserById(String id);
}

UserServiceImpl.java：

/*
* Copyright (c) 2016 www.bsfit.com.cn All Rights Reserved.
*/
package com.practice.service.impl;

import com.practice.mapper.UserMapper;
import com.practice.pojo.User;
import com.practice.service.IUserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.stereotype.Service;

/**
* @author: YeJunwei  Date: 2016/12/5 Time: 10:54
*/
@Component
public class UserServiceImpl implements IUserService {
@Autowired
private UserMapper userMapper;
@Override
public User getUserById(String id) {
//        UserExample example=new UserExample();
//        example.createCriteria().andIdEqualTo(id);
User user=userMapper.selectByPrimaryKey(id);
return user;
}
}

UserController.java

/*
* Copyright (c) 2016 www.bsfit.com.cn All Rights Reserved.
*/
package com.practice.controller;

import com.alibaba.fastjson.JSON;
import com.practice.pojo.User;
import com.practice.service.IUserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.stereotype.Component;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;

/**
* @author: YeJunwei  Date: 2016/12/5 Time: 10:31
*/
@RestController
public class UserController {
@Autowired
private IUserService userService;
@RequestMapping(value = "/user",method = RequestMethod.GET)
public String getUserById(String id){
User user=userService.getUserById(id);
String userStr= JSON.toJSONString(user);
return userStr;
}
}

最后启动App.java
package com.practice;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class App {
public static void main(String[] args) {
SpringApplication.run(App.class, args);
}
}