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

2024-06-21 00:48
文章标签 java maven 使用 springboot 开发 spring springmvc mybatis generator mybaits

本文主要是介绍使用maven+springboot+springmvc+mybaits-spring+mybatis-generator开发，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

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
先看项目目录

  1. 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>
  1. 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;@Overridepublic 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;}@Beanpublic 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();}@Beanpublic 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 generatorConfigurationPUBLIC "-//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

这里写图片描述
配置好之后双击，就会在指定目录生成代码了。
这里写图片描述
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 {@Autowiredprivate UserMapper userMapper;@Overridepublic 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 {@Autowiredprivate 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);
}
}
这里写图片描述

这篇关于使用maven+springboot+springmvc+mybaits-spring+mybatis-generator开发的文章就介绍到这儿，希望我们推荐的文章对编程师们有所帮助！


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