SSM相关

SSM

导坐标

<build><plugins><plugin><groupId>org.apache.tomcat.maven</groupId><artifactId>tomcat7-maven-plugin</artifactId><version>2.2</version><configuration><port>8080</port><path>/</path></configuration></plugin></plugins></build>

<dependencies><dependency><groupId>org.springframework</groupId><artifactId>spring-jdbc</artifactId><version>5.2.10.RELEASE</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-webmvc</artifactId><version>5.2.0.RELEASE</version></dependency><dependency><groupId>org.mybatis</groupId><artifactId>mybatis</artifactId><version>3.5.6</version></dependency><dependency><groupId>org.mybatis</groupId><artifactId>mybatis-spring</artifactId><version>1.3.0</version></dependency><dependency><groupId>com.alibaba</groupId><artifactId>druid</artifactId><version>1.1.16</version></dependency><dependency><groupId>com.mysql</groupId><artifactId>mysql-connector-j</artifactId><version>8.0.31</version></dependency><dependency><groupId>javax.servlet</groupId><artifactId>javax.servlet-api</artifactId><version>3.1.0</version><scope>provided</scope></dependency><dependency><groupId>com.fasterxml.jackson.core</groupId><artifactId>jackson-databind</artifactId><version>2.9.0</version></dependency></dependencies>

相关类

config文件夹下

ServletConfig类

package com.demo.config;import org.springframework.web.filter.CharacterEncodingFilter;
import org.springframework.web.servlet.support.AbstractAnnotationConfigDispatcherServletInitializer;
import javax.servlet.Filter;public class ServletConfig extends AbstractAnnotationConfigDispatcherServletInitializer {protected Class<?>[] getRootConfigClasses() {return new Class[]{SpringConfig.class};}protected Class<?>[] getServletConfigClasses() {return new Class[]{SpringMvcConfig.class};}protected String[] getServletMappings() {return new String[]{"/"};}@Overrideprotected Filter[] getServletFilters() {CharacterEncodingFilter filter = new CharacterEncodingFilter();filter.setEncoding("UTF-8");return new Filter[]{filter};}
}

SpringMvcConfig类

package com.demo.config;import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;@Configuration
@EnableWebMvc
@ComponentScan("com.demo.controller")
public class SpringMvcConfig {
}

SpringConfig类

package com.demo.config;import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Import;
import org.springframework.transaction.annotation.EnableTransactionManagement;@Configuration
@ComponentScan("com.demo.service")
@EnableTransactionManagement
@Import({JdbcConfig.class,MybatisConfig.class})
public class SpringConfig {}

JdbcConfig类

package com.demo.config;import com.alibaba.druid.pool.DruidDataSource;
import org.springframework.context.annotation.Bean;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;
import org.springframework.transaction.PlatformTransactionManager;
import javax.sql.DataSource;public class JdbcConfig {private String driver = "com.mysql.cj.jdbc.Driver";private String url="jdbc:mysql://localhost:3306/mydatabase";private String username="root";private String password="root";@Beanpublic DataSource dataSource(){DruidDataSource dataSource = new DruidDataSource();dataSource.setDriverClassName(driver);dataSource.setUrl(url);dataSource.setUsername(username);dataSource.setPassword(password);return dataSource;}@Beanpublic PlatformTransactionManager transactionManager(DataSource dataSource){DataSourceTransactionManager dataSourceTransactionManager = new DataSourceTransactionManager();dataSourceTransactionManager.setDataSource(dataSource);return dataSourceTransactionManager;}
}

MybatisConfig类

package com.demo.config;import org.mybatis.spring.SqlSessionFactoryBean;
import org.springframework.context.annotation.Bean;
import org.mybatis.spring.mapper.MapperScannerConfigurer;
import javax.sql.DataSource;public class MybatisConfig {@Beanpublic SqlSessionFactoryBean sqlSessionFactory(DataSource dataSource) {SqlSessionFactoryBean factoryBean = new SqlSessionFactoryBean();factoryBean.setDataSource(dataSource);factoryBean.setTypeAliasesPackage("com.demo.entry");return factoryBean;}@Beanpublic MapperScannerConfigurer mapperScannerConfigurer(){MapperScannerConfigurer mapperScannerConfigurer = new MapperScannerConfigurer();mapperScannerConfigurer.setBasePackage("com.demo.dao");return mapperScannerConfigurer;}
}

SpringMvcSupport类

package com.demo.config;import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport;@Configuration
public class SpringMvcSupport extends WebMvcConfigurationSupport {@Overrideprotected void addResourceHandlers(ResourceHandlerRegistry registry) {registry.addResourceHandler("/pagpes/**").addResourceLocations("/pages/");registry.addResourceHandler("/css/**").addResourceLocations("/css/");registry.addResourceHandler("/js/**").addResourceLocations("/js/");registry.addResourceHandler("/plugins/**").addResourceLocations("/plugins/");}@Overrideprotected void addInterceptors(InterceptorRegistry registry) {registry.addInterceptor(projectIntercepteor).addPathPatterns("/users","/users/*");//可添加其他路径用“，”隔开}
}

result文件夹下

Code类

package com.demo.result;public class Code {public static final Integer SUCCESS=200;public static final Integer ERROR=999;//其他自定义Code值
}

Result类

package com.demo.result;public class Result {private Integer code;private Object data;private String msg;//其他自定义属性值public Result() {}public Result(Integer code, Object data, String msg) {this.code = code;this.data = data;this.msg = msg;}public Result(Integer code, Object data) {this.code = code;this.data = data;}public Result(Object data) {this.data = data;}public Integer getCode() {return code;}public void setCode(Integer code) {this.code = code;}public Object getData() {return data;}public void setData(Object data) {this.data = data;}public String getMsg() {return msg;}public void setMsg(String msg) {this.msg = msg;}
}

其他文件夹下

自定义异常类

BusinessException类

package com.demo.exception;public class BusinessException extends RuntimeException{private Integer code;public Integer getCode() {return code;}public void setCode(Integer code) {this.code = code;}public BusinessException(Integer code,String message) {super(message);this.code = code;}public BusinessException(Integer code,String message, Throwable cause) {super(message, cause);this.code = code;}public BusinessException(Integer code,Throwable cause) {super(cause);this.code = code;}
}

SystemException类

package com.demo.exception;public class SystemException extends RuntimeException{private Integer code;public Integer getCode() {return code;}public void setCode(Integer code) {this.code = code;}public SystemException(Integer code,String message) {super(message);this.code = code;}public SystemException(Integer code,String message, Throwable cause) {super(message, cause);this.code = code;}public SystemException(Integer code,Throwable cause) {super(cause);this.code = code;}
}

异常处理类

package com.demo.controller;import com.demo.exception.BusinessException;
import com.demo.exception.SystemException;
import com.demo.result.Code;
import com.demo.result.Result;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.RestControllerAdvice;@RestControllerAdvice
public class ProjectExceptionAdvice {@ExceptionHandler(Exception.class)public Result doException(Exception ex){System.out.println("1");return new Result(Code.SYSTEM_UNKONW_ERR,null,"其他未定义异常");}@ExceptionHandler(SystemException.class)public Result doSystemException(SystemException ex){System.out.println("2");return new Result(ex.getCode(),null,ex.getMessage());}@ExceptionHandler(BusinessException.class)public Result doBusinessException(BusinessException ex){System.out.println("3");return new Result(ex.getCode(),null,ex.getMessage());}
}

拦截器相关

package com.demo.controller.interceptor;import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;@Component
public class ProjectIntercepteor implements HandlerInterceptor {public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {System.out.println("preHandle...");//false终止原始操作。//true执行原始操作。return false;}public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {System.out.println("postHandle...");}public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {System.out.println("afterCompletion...");}
}

1、多拦截器时，执行顺序根据书写顺序执行。
2、三个拦截器的执行顺序为ABC

	pre	post	after
返回结果为都为true时	A,B,C执行	A,B,C执行	A,B,C执行
C返回为false时	A,B,C执行	都不执行	A,B执行
B返回为false时	A,B执行	都不执行	A执行
A返回为false时	A执行	都不执行	都不执行

分模块开发

可选依赖（不透明）

在dependency中加入<optional>true</optional>修饰
例：

<dependency><groupId>org.mybatis</groupId><artifactId>mybatis</artifactId><version>3.5.6</version><optional>true</optional></dependency>

排除依赖（不需要）

在<dependency></dependency>中加入以下内容，设置要排除的依赖

<exclusions><exclusion><groupId></groupId><artifactId></artifactId></exclusion></exclusions>

例：

<dependency><groupId>com.demo</groupId><artifactId>pro_entry</artifactId><version>1.0-SNAPSHOT</version><exclusions><exclusion><groupId>log4j</groupId><artifactId>log4j</artifactId></exclusion></exclusions></dependency>

聚合

1.打包方式

  <packaging>pom</packaging>

2.引入模块

<modules><module>../pro_entry</module><module></module><!--  其他模块  --></modules>

继承

1.在子工程中添加父工程的pom信息继承父工程中的jar包

 <parent><version></version><artifactId></artifactId><groupId></groupId><relativePath></relativePath><!-- 父工程路径--></parent>

2.可选依赖父工程中配置的

<dependencyManagement><dependencies><dependency><groupId></groupId><artifactId></artifactId><version></version></dependency></dependencies></dependencyManagement>

配置多环境开发

   <profiles><profile><id>env_dep</id>
<!--            设定是否为默认启动环境--><activation><activeByDefault>true</activeByDefault></activation></profile></profiles>

设置跳过测试

<build>
<!--    设置跳过测试的内容    --><plugins><plugin><artifactId>maven-surefire-plugin</artifactId><version>2.12.4</version><configuration>
<!--                   true:跳过测试；false：不跳过测试，可用excludes设置不进测试的内容 --><skipTests>false</skipTests>
<!--           排除掉不参与测试的内容         --><excludes><exclude>**/UserTest.java</exclude></excludes></configuration></plugin></plugins>
</build>

mvn命令

跳过测试：

mvn 指令 -D skipTests
例：mvn install -D skipTests

多环境开发执行：

mvn 指令 -P 定义的id
例：mvn install -P env_pro

设置资源目录，并能够解析${}

<build>
<!--    设置资源目录，并设置能够解析${}--><resources><resource><directory>${project.basedir}/src/main/resources</directory><filtering>true</filtering></resource></resources></build>