配置等模版

• 页面引入BootStrap和JQuery

  <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@3.3.7/dist/css/bootstrap.min.css"
            integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">
  <script src="http://libs.baidu.com/jquery/2.0.0/jquery.min.js"></script>
  

• SSM配置文件：pom.xml

  	<dependencies>
           <dependency>
              <groupId>junit</groupId>
              <artifactId>junit</artifactId>
              <version>4.11</version>
          </dependency>
          <dependency>
              <groupId>mysql</groupId>
              <artifactId>mysql-connector-java</artifactId>
              <version>5.1.47</version>
          </dependency>
          <!-- 数据库连接池：c3p0 -->
  		<dependency>
     			<groupId>com.mchange</groupId>
     			<artifactId>c3p0</artifactId>
      		<version>0.9.5.2</version>
  		</dependency>
          <!-- Servlet Jsp Jstl-->
  		<dependency>
      		<groupId>javax.servlet</groupId>
      		<artifactId>javax.servlet-api</artifactId>
      		<version>3.1.0</version>
      		<scope>provided</scope>
  		</dependency>
          <dependency>
              <groupId>javax.servlet.jsp</groupId>
              <artifactId>jsp-api</artifactId>
              <version>2.2</version>
          </dependency>
          <dependency>
              <groupId>javax.servlet</groupId>
              <artifactId>jstl</artifactId>
              <version>1.2</version>
          </dependency>
          
          <!-- mybatis -->
          <dependency>
              <groupId>org.mybatis</groupId>
              <artifactId>mybatis</artifactId>
              <version>3.5.2</version>
          </dependency>
          <dependency>
              <groupId>org.mybatis</groupId>
              <artifactId>mybatis-spring</artifactId>
              <version>2.0.6</version>
          </dependency>
          
          <!-- spring -->
          <dependency>
              <groupId>org.springframework</groupId>
              <artifactId>spring-webmvc</artifactId>
              <version>5.2.12.RELEASE</version>
          </dependency>
          <!-- Spring操作数据库，需要spring-jdbc -->
          <dependency>
              <groupId>org.springframework</groupId>
              <artifactId>spring-jdbc</artifactId>
              <version>5.2.12.RELEASE</version>
          </dependency>
          <!-- AspectJ Weaver -->
  		<dependency>
      		<groupId>org.aspectj</groupId>
      		<artifactId>aspectjweaver</artifactId>
      		<version>1.9.6</version>
  		</dependency>
          
          <!--lombok -->
          <dependency>
              <groupId>org.projectlombok</groupId>
              <artifactId>lombok</artifactId>
              <version>1.18.12</version>
              <scope>provided</scope>
          </dependency>
      </dependencies>
  
  
  	<!--在build中配置resources，防止资源导出失败的问题-->
      <build>
          <resources>
              <resource>
                  <directory>src/main/resources</directory>
                  <includes>
                      <include>**/*.properties</include>
                      <include>**/*.xml</include>
                  </includes>
                  <filtering>false</filtering>
              </resource>
              <resource>
                  <directory>src/main/java</directory>
                  <includes>
                      <include>**/*.properties</include>
                      <include>**/*.xml</include>
                  </includes>
                  <filtering>false</filtering>
              </resource>
          </resources>
      </build>
  

• SSM的配置文件：

  web.xml：注册DispatcherServlet，乱码过滤

  <?xml version="1.0" encoding="UTF-8"?>
  <web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
           xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
           xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
           version="4.0">
  
      <!--1. 注册DispatcherServlet-->
      <servlet>
          <servlet-name>springmvc</servlet-name>
          <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
          <!--关联一个springmvc的配置文件：【servlet-name】-servlet.xml -->
          <init-param>
              <param-name>contextConfigLocation</param-name>
              <param-value>classpath:springmvc-servlet.xml</param-value>
          </init-param>
          <!--启动级别-1-->
          <load-on-startup>1</load-on-startup>
      </servlet>
  
  	<!-- / 和/* 的区别-->
      <!-- / 匹配所有的请求:(不包括.jsp)-->
      <!-- /* 匹配所有的请求：(包括.jsp)-->
      <servlet-mapping>
          <servlet-name>springmvc</servlet-name>
          <url-pattern>/</url-pattern>
      </servlet-mapping>
      
      
      <!--SpringMVC提供的乱码过滤器-->
      <filter>
          <filter-name>encoding</filter-name>
          <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
          <init-param>
              <param-name>encoding</param-name>
              <param-value>utf-8</param-value>
          </init-param>
      </filter>
      <filter-mapping>
          <filter-name>encoding</filter-name>
          <url-pattern>/*</url-pattern>
      </filter-mapping>
      
      <!--Session-->
      <session-config>
          <session-timeout>15</session-timeout>
      </session-config>
      
  </web-app>
  

• mybatis-config.xml：配置mapper，别名，日志等

  <?xml version="1.0" encoding="UTF-8" ?>
  <!DOCTYPE configuration
          PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
          "http://mybatis.org/dtd/mybatis-3-config.dtd">
  <configuration>
  
      <settings>
          <setting name="logImpl" value="STDOUT_LOGGING"/>
      </settings>
  
      <typeAliases>
          <package name="com.musecho.pojo"/>
      </typeAliases>
  
      <mappers>
          <mapper class="com.musecho.dao.BookMapper"/>
      </mappers>
  </configuration>
  

  只用mybatis 的核心配置文件：mybatis-config.xml

  <?xml version="1.0" encoding="UTF-8" ?>
  <!DOCTYPE configuration
          PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
          "http://mybatis.org/dtd/mybatis-3-config.dtd">
  <configuration>
      <environments default="development">
          <environment id="development">
              <transactionManager type="JDBC"/>
              <dataSource type="POOLED">
                  <property name="driver" value="com.mysql.jdbc.Driver"/>
                  <property name="url" value="jdbc:mysql://localhost:3306/MyBatiss?useSSL=true&amp;useUnicode=true&amp;characterEncoding=UTF-8"/>
                  <property name="username" value="root"/>
                  <property name="password" value="root"/>
              </dataSource>
          </environment>
      </environments>
      
       <!--每一个Mapper.xml都需要在Mybatis核心配置文件中注册！-->
      <mappers>
          <!--<mapper resource="dao/UserMapper.xml"/>-->
      </mappers>
  </configuration>
  

• db.properties

  jdbc.driver=com.mysql.jdbc.Driver
  # 如果使用的是MySQL 8.0+，需要增加时区的配置；&serverTimezone=Asia/Shanghai
  jdbc.url=jdbc:mysql://localhost:3306/ssmbuild?useSSL=true&useUnicode=true&characterEncoding=utf8
  jdbc.username=root
  jdbc.password=root
  

• spring-dao.xml

  <?xml version="1.0" encoding="UTF-8"?>
  <beans xmlns="http://www.springframework.org/schema/beans"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xmlns:context="http://www.springframework.org/schema/context"
         xsi:schemaLocation="http://www.springframework.org/schema/beans
          https://www.springframework.org/schema/beans/spring-beans.xsd
          http://www.springframework.org/schema/context
          https://www.springframework.org/schema/context/spring-context.xsd">
  
      <!--1. 关联数据库配置文件-->
      <context:property-placeholder location="classpath:database.properties"/>
  
      <!--2.连接池
          dbcp：半自动化操作，不能自动连接
          c3p0：自动化操作（自动化加载配置文件，并且可以自动设置到对象中）
          druid , hikari
      -->
      <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
          <property name="driverClass" value="${jdbc.driver}"/>
          <property name="jdbcUrl" value="${jdbc.url}"/>
          <property name="user" value="${jdbc.username}"/>
          <property name="password" value="${jdbc.password}"/>
  
          <!-- c3p0连接池的私有属性-->
          <property name="maxPoolSize" value="30"/>
          <property name="minPoolSize" value="10"/>
          <!-- 关闭连接后不自动commit-->
          <property name="autoCommitOnClose" value="false"/>
          <!-- 获取连接超过时间-->
          <property name="checkoutTimeout" value="10000"/>
          <!-- 当获取连接失败重试次数-->
          <property name="acquireRetryAttempts" value="2"/>
      </bean>
  
      <!-- 3.sqlSessionFactory-->
      <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
          <property name="dataSource" ref="dataSource"/>
          <!-- 绑定Mybatis的配置文件-->
          <property name="configLocation" value="classpath:mybatis-config.xml"/>
      </bean>
  
      <!-- 4.配置dao接口扫描包，动态的实现了Dao接口注入到Spring容器中-->
      <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
          <!-- 注入 sqlSessionFactory-->
          <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
          <!-- 要扫描的dao包-->
          <property name="basePackage" value="com.musecho.dao"/>
      </bean>
  
  </beans>
  

  数据源也可以使用Spring的

      <!--DataSource：使用Spring的数据源替换Mybatis的配置  c3p0  dbcp  druid
      这里使用Spring提供的JDBC： org.springframework.jdbc.datasource -->
      <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
          <property name="driverClassName" value="com.mysql.jdbc.Driver" />
          <property name="url" value="jdbc:mysql://localhost:3306/mybatiss?useSSL=true&amp;useUnicode=true&amp;characterEncoding=UTF-8" />
          <property name="username" value="root" />
          <property name="password" value="root" />
      </bean>
  

• spring-service.xml

  <?xml version="1.0" encoding="UTF-8"?>
  <beans xmlns="http://www.springframework.org/schema/beans"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xmlns:context="http://www.springframework.org/schema/context"
         xmlns:tx="http://www.springframework.org/schema/tx"
         xmlns:aop="http://www.springframework.org/schema/aop"
         xsi:schemaLocation="http://www.springframework.org/schema/beans
          https://www.springframework.org/schema/beans/spring-beans.xsd
          http://www.springframework.org/schema/context
          https://www.springframework.org/schema/context/spring-context.xsd
          http://www.springframework.org/schema/tx
          http://www.springframework.org/schema/tx/spring-tx.xsd
          http://www.springframework.org/schema/aop
          https://www.springframework.org/schema/aop/spring-aop.xsd">
  
  
      <!-- 1.扫描service下的包-->
      <context:component-scan base-package="com.musecho.service"/>
  
      <!-- 2.将我们的所有业务类，注入到Spring，可以通过配置或注解实现-->
      <bean id="BookServiceImpl" class="com.musecho.service.BookServiceImpl">
          <property name="bookMapper" ref="bookMapper"/>
      </bean>
  
  
      <!-- 3.声明式事务配置-->
      <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
          <!--注入到数据源-->
          <constructor-arg index="0" ref="dataSource" />
      </bean>
  
      <!-- 4.aop事务支持-->
      <!--配置事务通知-->
      <tx:advice id="txAdvice" transaction-manager="transactionManager">
          <!--给所有方法配置事务-->
          <tx:attributes>
              <tx:method name="*" propagation="REQUIRED"/>
          </tx:attributes>
      </tx:advice>
  
      <!--配置事务切入-->
      <aop:config>
          <aop:pointcut id="txPointCut" expression="execution(* com.musecho.dao.*.*(..))"/>
          <aop:advisor advice-ref="txAdvice" pointcut-ref="txPointCut"/>
      </aop:config>
  
  </beans>
  

• SpringMVC的配置文件springmvc-serlvet.xml：配置视图解析器。如果用注解开发，要配置自动扫描包。

  <?xml version="1.0" encoding="UTF-8"?>
  <beans xmlns="http://www.springframework.org/schema/beans"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xmlns:context="http://www.springframework.org/schema/context"
         xmlns:mvc="http://www.springframework.org/schema/mvc"
         xsi:schemaLocation="http://www.springframework.org/schema/beans
         http://www.springframework.org/schema/beans/spring-beans.xsd
         http://www.springframework.org/schema/context
         https://www.springframework.org/schema/context/spring-context.xsd
         http://www.springframework.org/schema/mvc
         https://www.springframework.org/schema/mvc/spring-mvc.xsd">
  
      <!--自动扫描包，让指定包下的注解生效，由IOC容器统一管理-->
      <context:component-scan base-package="com.musecho.controller"/>
  
      <!--视图解析器ViewResolver：解析DispatcherServlet传递来的ModelAndView-->
      <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" id="InternalResourceViewResolver">
          <!--前缀-->
          <property name="prefix" value="/WEB-INF/jsp/" />
          <!--后缀-->
          <property name="suffix" value=".jsp" />
      </bean>
  
  
      <!--JSON乱码问题配置-->
      <mvc:annotation-driven>
          <mvc:message-converters register-defaults="true">
              <bean class="org.springframework.http.converter.StringHttpMessageConverter">
                  <constructor-arg value="UTF-8"/>
              </bean>
              <bean class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
                  <property name="objectMapper">
                      <bean class="org.springframework.http.converter.json.Jackson2ObjectMapperFactoryBean">
                          <property name="failOnEmptyBeans" value="false"/>
                      </bean>
                  </property>
              </bean>
          </mvc:message-converters>
      </mvc:annotation-driven>
  
  
      <!--Handler-->
      <!-- <bean id="/hello" class="com.musecho.controller.HelloController" /> -->
  
  </beans>
  

• applicationContext.xml

  <?xml version="1.0" encoding="UTF-8"?>
  <beans xmlns="http://www.springframework.org/schema/beans"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://www.springframework.org/schema/beans
          https://www.springframework.org/schema/beans/spring-beans.xsd">
  
     <import resource="spring-dao.xml"/>
     <import resource="spring-service.xml"/>
     <import resource="spring-mvc.xml"/>
  
  </beans>
  

• pojo类中的lombok注解

  @Data
  @AllArgsConstructor
  @NoArgsConstructor
  

• 日志：log4j.properties 配置文件

  #将等级为DEBUG的日志信息输出到console和file这两个目的地，console和file的定义在下面的代码
  log4j.rootLogger=DEBUG,console,file
  
  #控制台输出的相关设置
  log4j.appender.console = org.apache.log4j.ConsoleAppender
  log4j.appender.console.Target = System.out
  log4j.appender.console.Threshold=DEBUG
  log4j.appender.console.layout = org.apache.log4j.PatternLayout
  log4j.appender.console.layout.ConversionPattern=[%c]-%m%n
  
  #文件输出的相关设置
  log4j.appender.file = org.apache.log4j.RollingFileAppender
  log4j.appender.file.File=./log/musecho.log
  log4j.appender.file.MaxFileSize=10mb
  log4j.appender.file.Threshold=DEBUG
  log4j.appender.file.layout=org.apache.log4j.PatternLayout
  log4j.appender.file.layout.ConversionPattern=[%p][%d{yy-MM-dd}][%c]%m%n
  
  #日志输出级别
  log4j.logger.org.mybatis=DEBUG
  log4j.logger.java.sql=DEBUG
  log4j.logger.java.sql.Statement=DEBUG
  log4j.logger.java.sql.ResultSet=DEBUG
  log4j.logger.java.sq1.PreparedStatement=DEBUG
  

• 乱码问题：一般SpringMVC自带的乱码过滤器就够了，不行就用终极自定义过滤器

  GenericEncodingFilter.java

  public class GenericEncodingFilter implements Filter {
  
      public void init(FilterConfig filterConfig) throws ServletException {
  
      }
  
      public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
          //处理response的字符编码
          HttpServletResponse myResponse = (HttpServletResponse) servletResponse;
          myResponse.setContentType("text/html;charset=UTF-8");
  
          //转型为与协议相关对象
          HttpServletRequest httpServletRequest = (HttpServletRequest) servletRequest;
          //对request包装增强
          HttpServletRequest myRequest = new MyRequest(httpServletRequest);
  
          filterChain.doFilter(myRequest, servletResponse);
  
      }
  
      public void destroy() {
  
      }
  }
  
  //自定义request对象，HttpServletRequest的包装类
  class MyRequest extends HttpServletRequestWrapper {
  
      private HttpServletRequest request;
  
      //是否编码的标记
      private boolean hasEncode;
  
      //定义一个可以传入HttpServletRequest对象的构造函数，以便对其进行装饰
      public MyRequest(HttpServletRequest request) {
          super(request);
          this.request = request;
      }
  
      //对需要增强方法 进行覆盖
      public Map getParameterMap() {
          //先获得请求方法
          String method = request.getMethod();
          if (method.equalsIgnoreCase("post")) {
              //post请求
              try {
                  //处理post乱码
                  request.setCharacterEncoding("utf-8");
                  return request.getParameterMap();
              } catch (UnsupportedEncodingException e) {
                  e.printStackTrace();
              }
          } else if (method.equalsIgnoreCase("get")) {
              //get请求
              Map<String, String[]> parameterMap = request.getParameterMap();
              if (!hasEncode) {
                  for (String parameterName : parameterMap.keySet()) {
                      String[] values = parameterMap.get(parameterName);
                      if (values != null) {
                          for (int i = 0; i < values.length; i++) {
                              try {
                                  //处理get乱码
                                  values[i] = new String(values[i]
                                          .getBytes("ISO-8859-1"), "utf-8");
                              } catch (UnsupportedEncodingException e) {
                                  e.printStackTrace();
                              }
                          }
                      }
                  }
                  hasEncode = true;
  
              }
              return parameterMap;
          }
  
          return super.getParameterMap();
      }
  
      //取一个值
      public String getParameter(String name) {
          Map<String, String[]> parameterMap = getParameterMap();
          String[] values = parameterMap.get(name);
          if (values == null) {
              return null;
          }
  
          return values[0];//取回参数的第一个值
      }
  
      //取所有值
      public String[] getParameterValues(String name) {
          Map<String, String[]> parameterMap = getParameterMap();
          String[] values = parameterMap.get(name);
          return values;
      }
  
  }
  

  web.xml增加配置

  	<!--配置SpringMVC的乱码过滤-->
      <filter>
          <filter-name>encoding</filter-name>
          <filter-class>com.musecho.filter.GenericEncodingFilter</filter-class>
      </filter>
      <filter-mapping>
          <filter-name>encoding</filter-name>
          <url-pattern>/*</url-pattern>
      </filter-mapping>
  

• Spring的注解

  • @Autowired：自动装配

  • @Nullable（字段）

  • @Qualifier(value="xx")：指定一个唯一的bean对象注入

  • @Component：代替配置文件中bean的注册

    • @Repository：dao层

• @Service

  • @Controller

  • @RestController：类上方加这个注解，该类里所有的方法都不会走视图解析器，直接返回字符串。

  • @Value：代替配置文件中bean的简单属性值的注入

  • @Scope("xx")：作用域，默认singleton

    JavaConfig中使用

  • @Configuration：代表这是一个配置类，代替applicationConfig.xml

  • @ComponentScan("pojo")：代替<context:component-scan base-package="pojo"/>

  • @Bean：注册一个bean，就相当于配置文件中的一个bean标签

  • @Import：若出现多个配置类，可以使用@Import导入

• javax自带注解：

  • @Resource：自动装配

• SpringMVC的注解：

  • @RequestMapping：用于映射url到控制器类或一个特定的处理方法。@RequestMapping默认是GET方法，在url中传参。

  • @RequestParam：前端提交的域名称和处理方法的参数名不一致。一致一般也会加。

  • @ResponseBody：方法上加上这个注解，就不会走视图解析器，直接返回一个字符串。（json用）

  • @PathVariable：方法中传参要加这个注解

  • @RequestMapping的参数method=RequestMethod.xxx

  • @GetMapping //默认请求方式
    @PostMapping //相当于@RequestMapping(。。。,method = RequestMethod.POST)
    @PutMapping
    @DeleteMapping
    @PatchMapping