不用xml 配置文件，纯粹使用java配置类搭建SSM项目-白红宇

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不用xml 配置文件，纯粹使用java配置类搭建SSM项目

阅读量：5286 次

发布时间：2019-06-14

本文共 25420 字，大约阅读时间需要 84 分钟。

随着spring版本迭代更新，现在越来越倡导不使用复杂繁琐的配置文件来配置项目，下面介绍纯粹使用java 配置类来配置spring、springmvc、mybatis；

环境：java 8 + maven + IDEA + mysql

新建maven web项目：（这个就不介绍了，网上一大堆的教程），下面进入正题；

一、项目所需依赖jar


       
      
       4.0.0
        
      
       com.open.ssm
        
      
       ssm-demo
        
      
       0.0.1-SNAPSHOT
        
      
       war
                    
          
              
       
        UTF-8
               
       
        4.12
               
       
        4.3.0.RELEASE
               
       
        2.5.0
               
       
        5.1.37
               
       
        1.2.3
               
       
        1.7.12
               
       
        2.4
               
       
        1.3.2
               
       
        3.2.2
               
       
        3.3.2
               
       
        1.10
               
       
        3.1.0
               
       
        1.0.16
               
               
       
        2.0.5
               
       
        2.7.18
           
              
          
                        
               
                   
        
         junit
                    
        
         junit
                    
        
         ${junit.version}
                    
        
         test
                
                       
               
                   
        
         com.alibaba
                    
        
         fastjson
                    
        
         ${fastjson.version}
                
                       
               
                   
        
         org.springframework
                    
        
         spring-core
                    
        
         ${spring.version}
                
               
                   
        
         org.springframework
                    
        
         spring-beans
                    
        
         ${spring.version}
                
               
                   
        
         org.springframework
                    
        
         spring-context
                    
        
         ${spring.version}
                
               
                   
        
         org.springframework
                    
        
         spring-tx
                    
        
         ${spring.version}
                
               
                   
        
         org.springframework
                    
        
         spring-web
                    
        
         ${spring.version}
                
               
                   
        
         org.springframework
                    
        
         spring-webmvc
                    
        
         ${spring.version}
                
               
                   
        
         org.springframework
                    
        
         spring-jdbc
                    
        
         ${spring.version}
                
               
                   
        
         org.springframework
                    
        
         spring-test
                    
        
         ${spring.version}
                    
        
         test
                
                       
                   
        
         org.springframework
                    
        
         spring-aspects
                    
        
         ${spring.version}
                
               
               
               
                   
        
         com.fasterxml.jackson.core
                    
        
         jackson-annotations
                    
        
         ${jackson.version}
                
               
                   
        
         com.fasterxml.jackson.core
                    
        
         jackson-core
                    
        
         ${jackson.version}
                
               
                   
        
         com.fasterxml.jackson.core
                    
        
         jackson-databind
                    
        
         ${jackson.version}
                
               
               
               
                   
        
         mysql
                    
        
         mysql-connector-java
                    
        
         ${mysql-connector-java.version}
                
                       
               
                   
        
         commons-io
                    
        
         commons-io
                    
        
         ${commons-io.version}
                
               
                   
        
         commons-fileupload
                    
        
         commons-fileupload
                    
        
         ${commons-fileupload.version}
                
                       
                   
        
         commons-collections
                    
        
         commons-collections
                    
        
         ${commons-collections.version}
                
                       
                   
        
         org.apache.commons
                    
        
         commons-lang3
                    
        
         ${commons-lang3.version}
                
                       
                   
        
         commons-codec
                    
        
         commons-codec
                    
        
         ${commons-codec.version}
                
               
                       
               
                   
        
         org.slf4j
                    
        
         slf4j-log4j12
                    
        
         ${slf4j.version}
                
                       
               
                   
        
         javax.servlet
                    
        
         javax.servlet-api
                    
        
         ${javax.servlet-api.version}
                    
        
         provided
                
               
                   
        
         javax.servlet
                    
        
         jstl
                    
        
         1.2
                
               
               
                   
        
         com.alibaba
                    
        
         druid
                    
        
         ${druid.version}
                
                       
                       
                 
        
         com.baomidou
                  
        
         mybatis-plus
                  
        
         ${mybatis-plus.version}
                
                       
               
                   
        
         com.ibeetl
                    
        
         beetl
                    
        
         ${beetl.version}
                
               
               
                   
        
         org.projectlombok
                    
        
         lombok
                    
        
         1.16.12
                
             
                
              
       
        ssm-demo
               
                               
                        
         
          org.apache.maven.plugins
                         
         
          maven-war-plugin
                         
         
          2.5
                         
                             
          
           false
                          
                     
                    
                        
         
          org.apache.tomcat.maven
                         
         
          tomcat7-maven-plugin
                         
                             
          
           8088
                              
          
           /

二、在maven项目中新建几个基本包

三、spring配置类

　　1、webconfig 配置类，继承 WebMvcConfigurerAdapter

package com.study.ssm.config;import org.beetl.ext.spring.BeetlGroupUtilConfiguration;import org.beetl.ext.spring.BeetlSpringViewResolver;import org.springframework.context.annotation.Bean;import org.springframework.context.annotation.ComponentScan;import org.springframework.context.annotation.Configuration;import org.springframework.core.io.DefaultResourceLoader;import org.springframework.core.io.support.ResourcePatternResolver;import org.springframework.core.io.support.ResourcePatternUtils;import org.springframework.web.multipart.commons.CommonsMultipartResolver;import org.springframework.web.servlet.config.annotation.DefaultServletHandlerConfigurer;import org.springframework.web.servlet.config.annotation.EnableWebMvc;import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;/** * Web Configuration Class * * @author EnzoLuo * @date 2018/10/22 */@Configuration@EnableWebMvc@ComponentScan("com.study.ssm.controller")public class WebConfig extends WebMvcConfigurerAdapter {        @Bean(initMethod = "init")    public BeetlGroupUtilConfiguration getBeetlGroupUtilConfiguration() {        BeetlGroupUtilConfiguration beetlGroupUtilConfiguration = new BeetlGroupUtilConfiguration();        ResourcePatternResolver patternResolver = ResourcePatternUtils.getResourcePatternResolver(new DefaultResourceLoader());        beetlGroupUtilConfiguration.setConfigFileResource(patternResolver.getResource("classpath:beetl.properties"));        return beetlGroupUtilConfiguration;    }    @Bean(name = "viewResolver")    public BeetlSpringViewResolver getBeetlSpringViewResolver() {        BeetlSpringViewResolver beetlSpringViewResolver = new BeetlSpringViewResolver();        beetlSpringViewResolver.setContentType("text/html;charset=UTF-8");        beetlSpringViewResolver.setOrder(0);        return beetlSpringViewResolver;    }//静态资源的处理    @Override    public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {        configurer.enable();    }}

　　2、RootConfig 配置类功能：配置基本的扫描包

package com.study.ssm.config;import org.springframework.aop.framework.autoproxy.BeanNameAutoProxyCreator;import org.springframework.context.annotation.Bean;import org.springframework.context.annotation.ComponentScan;import org.springframework.context.annotation.Configuration;import org.springframework.context.annotation.Import;/** * Root Configuration Class * * @author EnzoLuo * @date 2018/10/22 */@Configuration@ComponentScan(basePackages={ "com.study.ssm.config", "com.study.ssm.repository", "com.study.ssm.service" })public class RootConfig {        @Bean    public BeanNameAutoProxyCreator proxycreate(){        BeanNameAutoProxyCreator proxycreate = new BeanNameAutoProxyCreator();        proxycreate.setProxyTargetClass(true);        proxycreate.setBeanNames("*ServiceImpl");        proxycreate.setInterceptorNames("transactionInterceptor");        return proxycreate;    }    }

　　3、新建 WebAppInitializer类继承 AbstractAnnotationConfigDispatcherServletInitializer

　　　这里是把刚才写的两个配置类加载进来

package com.study.ssm.config;import org.apache.log4j.Logger;import org.springframework.web.servlet.support.AbstractAnnotationConfigDispatcherServletInitializer;/** * Application gateway and load config class * * @author EnzoLuo * @date 2018/10/22 */public class WebAppInitializer extends AbstractAnnotationConfigDispatcherServletInitializer {    private final static Logger LOG = Logger.getLogger(WebAppInitializer.class);        @Override    protected Class
     [] getRootConfigClasses() {        LOG.info("------root配置类初始化------");        return new Class
     [] { RootConfig.class };     }    @Override    protected Class
     [] getServletConfigClasses() {        LOG.info("------web配置类初始化------");        return new Class
     [] { WebConfig.class };    }    @Override    protected String[] getServletMappings() {        LOG.info("------映射根路径初始化------");        return new String[]{ "/" };//请求路径映射，根路径    }    }

四、新建 beetl.properties 用来配置视图解析器

　　这个文件的引入是在WebConfig 里面

#classpath 根路径，即模板资源路径RESOURCE.root=/WEB-INF/view/#是否检测文件变化,开发用true合适，但线上要改为falseRESOURCE.autoCheck= true

五、加上一个 log4j.properties

### set log levels ### log4j.rootLogger = INFO , C , D , E ### console ### log4j.appender.C = org.apache.log4j.ConsoleAppender log4j.appender.C.Target = System.out log4j.appender.C.layout = org.apache.log4j.PatternLayout log4j.appender.C.layout.ConversionPattern = [ssm-demo][%p] [%-d{yyyy-MM-dd HH:mm:ss}] %C.%M(%L) | %m%n ### log file ### log4j.appender.D = org.apache.log4j.DailyRollingFileAppender log4j.appender.D.File = ../logs/ssm-demo.log log4j.appender.D.Append = true log4j.appender.D.Threshold = INFO log4j.appender.D.layout = org.apache.log4j.PatternLayout log4j.appender.D.layout.ConversionPattern = [ssm-demo][%p] [%-d{yyyy-MM-dd HH:mm:ss}] %C.%M(%L) | %m%n ### exception ### log4j.appender.E = org.apache.log4j.DailyRollingFileAppender log4j.appender.E.File = ../logs/ssm-demo_error.log log4j.appender.E.Append = true log4j.appender.E.Threshold = ERROR log4j.appender.E.layout = org.apache.log4j.PatternLayout log4j.appender.E.layout.ConversionPattern = [ssm-demo][%p] [%-d{yyyy-MM-dd HH:mm:ss}] %C.%M(%L) | %m%n

暂时写一个 indexController 测试一下；

package com.study.ssm.controller;import java.io.File;import java.io.IOException;import java.util.UUID;import javax.servlet.http.HttpServletRequest;import org.apache.log4j.Logger;import org.springframework.stereotype.Controller;import org.springframework.ui.Model;import org.springframework.web.bind.annotation.GetMapping;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.multipart.MultipartFile;import org.springframework.web.servlet.ModelAndView;/** * index * * @author EnzoLuo * @date 2018/10/22 */@Controllerpublic class IndexController {    @SuppressWarnings("unused")    private final static Logger LOG = Logger.getLogger(IndexController.class);        @GetMapping("/index")    public String index(){        return "ssm.html";    }    }

记得在WEB-INF 下新建一个view目录，然后随便加一个 ssm.html 文件

启动项目访问、如果正确访问到ssm.html 则说明配置成功

注：别忘了install 一下，我之前又一次出错了，怎么都不到原因，最后突然想起来，忘记install了

第二阶段：配置mybatis

一：jdbc.properties

spring.datasource.type=com.alibaba.druid.pool.DruidDataSourcespring.datasource.driverClassName=com.mysql.jdbc.Driverspring.datasource.url=jdbc:mysql://localhost:3306/zhidevelopspring.datasource.username=rootspring.datasource.password=root#连接池配置spring.datasource.initialSize=5spring.datasource.minIdle=5spring.datasource.maxActive=20#连接等待超时时间spring.datasource.maxWait=60000#配置隔多久进行一次检测(检测可以关闭的空闲连接)spring.datasource.timeBetweenEvictionRunsMillis=60000#配置连接在池中的最小生存时间spring.datasource.minEvictableIdleTimeMillis=300000spring.datasource.validationQuery=SELECT 1 FROM DUALspring.datasource.testWhileIdle=truespring.datasource.testOnBorrow=falsespring.datasource.testOnReturn=false# 打开PSCache，并且指定每个连接上PSCache的大小spring.datasource.poolPreparedStatements=truespring.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

二、新建 DruidDataSourceConfig 配置类

package com.study.ssm.config; import com.alibaba.druid.pool.DruidDataSource; import com.baomidou.mybatisplus.entity.GlobalConfiguration; import com.baomidou.mybatisplus.spring.MybatisSqlSessionFactoryBean; import org.apache.log4j.Logger; import org.mybatis.spring.annotation.MapperScan; import org.springframework.beans.factory.annotation.Value; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import org.springframework.context.annotation.PropertySource; import org.springframework.core.io.support.PathMatchingResourcePatternResolver; import org.springframework.core.io.support.ResourcePatternResolver; import org.springframework.jdbc.datasource.DataSourceTransactionManager; import org.springframework.transaction.interceptor.TransactionInterceptor; import javax.sql.DataSource; import java.io.IOException; import java.sql.SQLException; import java.util.Properties; /**  * DataSource Configuration Class  *  * @author EnzoLuo  * @date 2018/10/22  */ @Configuration @PropertySource("classpath:/jdbc.properties") @MapperScan(basePackages="com.study.ssm.repository") public class DruidDataSourceConfig {
      private final static Logger LOG = Logger.getLogger(DruidDataSourceConfig.class);    @Value("${spring.datasource.url}")      private String dbUrl;      @Value("${spring.datasource.username}")      private String username;      @Value("${spring.datasource.password}")      private String password;      @Value("${spring.datasource.driverClassName}")      private String driverClassName;      @Value("${spring.datasource.initialSize}")      private int initialSize;      @Value("${spring.datasource.minIdle}")      private int minIdle;      @Value("${spring.datasource.maxActive}")      private int maxActive;      @Value("${spring.datasource.maxWait}")      private int maxWait;      @Value("${spring.datasource.timeBetweenEvictionRunsMillis}")      private int timeBetweenEvictionRunsMillis;      @Value("${spring.datasource.minEvictableIdleTimeMillis}")      private int minEvictableIdleTimeMillis;      @Value("${spring.datasource.validationQuery}")      private String validationQuery;      @Value("${spring.datasource.testWhileIdle}")      private boolean testWhileIdle;      @Value("${spring.datasource.testOnBorrow}")      private boolean testOnBorrow;      @Value("${spring.datasource.testOnReturn}")      private boolean testOnReturn;      @Value("${spring.datasource.poolPreparedStatements}")      private boolean poolPreparedStatements;      @Value("${spring.datasource.maxPoolPreparedStatementPerConnectionSize}")      private int maxPoolPreparedStatementPerConnectionSize;      @Value("${spring.datasource.filters}")      private String filters;      @Value("{spring.datasource.connectionProperties}")      private String connectionProperties;      @Bean     //声明其为Bean实例      public DataSource dataSource(){
          LOG.info("Initialize the data source...");         DruidDataSource datasource = new DruidDataSource();          datasource.setUrl(this.dbUrl);          datasource.setUsername(username);          datasource.setPassword(password);          datasource.setDriverClassName(driverClassName);          //configuration          datasource.setInitialSize(initialSize);          datasource.setMinIdle(minIdle);          datasource.setMaxActive(maxActive);          datasource.setMaxWait(maxWait);          datasource.setTimeBetweenEvictionRunsMillis(timeBetweenEvictionRunsMillis);          datasource.setMinEvictableIdleTimeMillis(minEvictableIdleTimeMillis);          datasource.setValidationQuery(validationQuery);          datasource.setTestWhileIdle(testWhileIdle);          datasource.setTestOnBorrow(testOnBorrow);          datasource.setTestOnReturn(testOnReturn);          datasource.setPoolPreparedStatements(poolPreparedStatements);          datasource.setMaxPoolPreparedStatementPerConnectionSize(maxPoolPreparedStatementPerConnectionSize);          try {              datasource.setFilters(filters);          } catch (SQLException e) {             LOG.error("druid configuration initialization filter", e);          }          datasource.setConnectionProperties(connectionProperties);          return datasource;      }     /*     //JdbcTemplate的配置     @Bean     public JdbcTemplate jdbcTemplate(){
          JdbcTemplate jdbcTemplate = new JdbcTemplate();        jdbcTemplate.setDataSource(dataSource());        return jdbcTemplate;     }     @Bean     public NamedParameterJdbcTemplate namedParameterJdbcTemplate(){
          NamedParameterJdbcTemplate namedParameterJdbcTemplate = new NamedParameterJdbcTemplate(dataSource());        return namedParameterJdbcTemplate;     }*/     //全局配置     public GlobalConfiguration globalConfigurationBean(){
           GlobalConfiguration globalConfiguration = new GlobalConfiguration();         globalConfiguration.setIdType(2);//AUTO->`0`("数据库ID自增")、INPUT->`1`(用户输入ID")、ID_WORKER->`2`("全局唯一ID")、UUID->`3`("全局唯一ID")         globalConfiguration.setDbColumnUnderline(true);//全局表为下划线命名设置 true         return globalConfiguration;     }     //mybatis的配置     @Bean     public MybatisSqlSessionFactoryBean sqlSessionFactoryBean() throws IOException{
          ResourcePatternResolver resourcePatternResolver = new PathMatchingResourcePatternResolver();          //SqlSessionFactoryBean sqlSessionFactoryBean = new SqlSessionFactoryBean();         MybatisSqlSessionFactoryBean sqlSessionFactoryBean = new MybatisSqlSessionFactoryBean();//mybatis-plus插件类         sqlSessionFactoryBean.setDataSource(dataSource());//数据源         sqlSessionFactoryBean.setGlobalConfig(globalConfigurationBean());//MP全局注入         sqlSessionFactoryBean.setMapperLocations(resourcePatternResolver.getResources("classpath*:mybatis/mappers/*.xml"));         sqlSessionFactoryBean.setTypeAliasesPackage("com.study.ssm.entity");//别名，让*Mpper.xml实体类映射可以不加上具体包名         return sqlSessionFactoryBean;     }     @Bean(name = "transactionManager")     public DataSourceTransactionManager dataSourceTransactionManager(){
          DataSourceTransactionManager dataSourceTransactionManager = new DataSourceTransactionManager();        dataSourceTransactionManager.setDataSource(dataSource());        return dataSourceTransactionManager;     }     @Bean(name="transactionInterceptor")     public TransactionInterceptor interceptor(){
          TransactionInterceptor interceptor = new TransactionInterceptor();        interceptor.setTransactionManager(dataSourceTransactionManager());        Properties transactionAttributes = new Properties();        transactionAttributes.setProperty("save*", "PROPAGATION_REQUIRED");        transactionAttributes.setProperty("del*", "PROPAGATION_REQUIRED");        transactionAttributes.setProperty("update*", "PROPAGATION_REQUIRED");        transactionAttributes.setProperty("get*", "PROPAGATION_REQUIRED,readOnly");        transactionAttributes.setProperty("find*", "PROPAGATION_REQUIRED,readOnly");        transactionAttributes.setProperty("*", "PROPAGATION_REQUIRED");        interceptor.setTransactionAttributes(transactionAttributes);        return interceptor;     }     /*     //放这里会导致@value注解获取不到配置的值，移到RootConfig     @Bean     public BeanNameAutoProxyCreator proxycreate(){
          BeanNameAutoProxyCreator proxycreate = new BeanNameAutoProxyCreator();        proxycreate.setProxyTargetClass(true);        proxycreate.setBeanNames("*ServiceImpl");        proxycreate.setInterceptorNames("transactionInterceptor");        return proxycreate;     }*/ }

三、再次启动项目，如果正常启动则项目配置dataSource配置正确

第三阶段：测试mybatis继承情况：

　　一、新建UserDTO 实体类

　　注：我这里使用lombok 插件，如果没有的话可以下一个或者，自己手动增加get、set方法

package com.study.ssm.entity; import lombok.Getter; import lombok.Setter; /**  * 用户实体类  *  * @author EnzoLuo  * @date 2018/10/22  */ @Getter @Setter public class UserDTO {
       private Integer id;     private String name;     private String password;     @Override     public String toString() {
           return super.toString();     } }

二、添加mapper文件：这里注意路径，在DruidDataSourceConfig 会加载进去


     
         
              
               
               
           
              
          
      
               UPDATE user SET name=#{name} WHERE id=#{id}

三、UserRepository

package com.study.ssm.repository;import com.study.ssm.entity.UserDTO;import org.apache.ibatis.annotations.Param;/** * UserRepository * * @author EnzoLuo * @date 2018/10/22 */public interface UserRepository {    UserDTO findById(@Param("id") Integer id);    void updateUser(UserDTO userDTO);}

四、UserService和UserServiceImpl

package com.study.ssm.service;import com.study.ssm.entity.UserDTO;/** * UserService * * @author EnzoLuo * @date 2018/10/22 */public interface UserService {        UserDTO findById(Integer id);        void updateUserById(UserDTO userDTO);}

package com.study.ssm.service.spring;import com.study.ssm.entity.UserDTO;import com.study.ssm.repository.UserRepository;import com.study.ssm.service.UserService;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Service;/** * UserServiceImpl * * @author EnzoLuo * @date 2018/10/22 */@Servicepublic class UserServiceImpl implements UserService {    @Autowired    private UserRepository userRepository;    @Override    public UserDTO findById(Integer id) {        UserDTO userDTO = userRepository.findById(id);        return userDTO;    }    @Override    public void updateUserById(UserDTO userDTO) {        userRepository.updateUser(userDTO);    }}

五、写一个UserController 测试一下

package com.study.ssm.controller;import com.study.ssm.entity.UserDTO;import com.study.ssm.service.UserService;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.web.bind.annotation.GetMapping;import org.springframework.web.bind.annotation.PostMapping;import org.springframework.web.bind.annotation.RequestParam;import org.springframework.web.bind.annotation.RestController;/** * UserController * * @author EnzoLuo * @date 2018/10/22 */@RestControllerpublic class UserController {    @Autowired    private UserService userService;    @GetMapping("/getUserById")    public UserDTO getUserById(@RequestParam(name = "id") Integer id) {        UserDTO userDTO = userService.findById(id);        return userDTO;    }    @PostMapping("/updateUserById")    public String updateUser(){        try{            UserDTO userDTO = new UserDTO();            userDTO.setId(1);            userDTO.setName("enzoluo");            userDTO.setPassword("456");            userService.updateUserById(userDTO);        }catch(Exception e){            e.printStackTrace();            return "update failed";        }        return "update success";    }}

结果：查询

修改：

再次查询：

打完收工，谢谢阅读！

githup出了点问题，稍后会将代码放上去。

转载于:https://www.cnblogs.com/enzoluo-blog/p/9812521.html

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