springMVC之AOP

springMVC之AOP

学习了：https://www.cnblogs.com/parryyang/p/5881523.html

 学习了：http://blog.csdn.net/my_nice_life/article/details/52910718

可以使用spring 中声明方式：

<!-- 配置切面的Bean -->
    <bean id="validateAspect" class="com.srie.control.ValidateAspect"></bean>
    
     <!-- 配置AOP -->
    <aop:config>
        <!-- 配置切点表达式  -->
        <aop:pointcut id="pointcut" expression="execution(* com.srie.control.*.*(..))" />
        <!-- 配置切面及配置 -->
        <aop:aspect order="3" ref="validateAspect">
            <!-- 前置通知 -->
            <aop:before method="beforMethod" pointcut-ref="pointcut"/>
            <!-- 后置通知 -->
            <aop:after method="afterMethod" pointcut-ref="pointcut"/>
            <!-- 返回通知 -->
            <aop:after-returning method="afterReturnMethod" pointcut-ref="pointcut" returning="result"/>
            <!-- 异常通知 -->
            <aop:after-throwing method="afterThrowingMethod" pointcut-ref="pointcut" throwing="ex"/>
        </aop:aspect>
    </aop:config>

也可以使用annotation方式：

    <!-- 配置使Spring采用CGLIB代理 -->
    <aop:aspectj-autoproxy proxy-target-class="true" />

注意要在spring mvc.xml中进行配置；

注意aspectjrt的版本，使用过低版本会导致：:0 can't find referenced pointcut addHander  错误；

pom.xml:

<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/maven-v4_0_0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.stono</groupId>
    <artifactId>SpringAOP</artifactId>
    <packaging>war</packaging>
    <version>0.0.1-SNAPSHOT</version>
    <name>SpringAOP Maven Webapp</name>
    <url>http://maven.apache.org</url>
    <dependencies>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aop</artifactId>
            <version>4.1.6.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjweaver</artifactId>
            <version>1.6.6</version>
        </dependency>
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjrt</artifactId>
            <version>1.6.6</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-core</artifactId>
            <version>2.1.0</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>2.1.0</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-annotations</artifactId>
            <version>2.1.0</version>
        </dependency>
        <dependency>
            <groupId>commons-io</groupId>
            <artifactId>commons-io</artifactId>
            <version>1.3.2</version>
        </dependency>
        <dependency>
            <groupId>commons-fileupload</groupId>
            <artifactId>commons-fileupload</artifactId>
            <version>1.2.1</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>4.1.6.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>3.8.1</version>
            <scope>test</scope>
        </dependency>
    </dependencies>
    <build>
        <finalName>SpringAOP</finalName>
    </build>
</project>

beans.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:aop="http://www.springframework.org/schema/aop" xmlns:beans="http://www.springframework.org/schema/beans" xmlns:context="http://www.springframework.org/schema/context"
    xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:task="http://www.springframework.org/schema/task"
    xsi:schemaLocation="http://www.springframework.org/schema/aop 
    http://www.springframework.org/schema/aop/spring-aop-4.1.xsd
        http://www.springframework.org/schema/mvc 
        http://www.springframework.org/schema/mvc/spring-mvc-4.1.xsd
        http://www.springframework.org/schema/beans 
        http://www.springframework.org/schema/beans/spring-beans-4.1.xsd
        http://www.springframework.org/schema/context 
        http://www.springframework.org/schema/context/spring-context-4.1.xsd
        http://www.springframework.org/schema/aop 
         http://www.springframework.org/schema/aop/spring-aop-4.1.xsd
         http://www.springframework.org/schema/tx 
         http://www.springframework.org/schema/tx/spring-tx-4.1.xsd
        http://www.springframework.org/schema/task 
        http://www.springframework.org/schema/task/spring-task-4.1.xsd" 
        default-lazy-init="true">
    <!-- 扫描服务包 -->
    <context:component-scan base-package="com.srie.service" />
    
    
</beans>

springmvc.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:aop="http://www.springframework.org/schema/aop" xmlns:beans="http://www.springframework.org/schema/beans" xmlns:context="http://www.springframework.org/schema/context"
    xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:task="http://www.springframework.org/schema/task"
    xsi:schemaLocation="http://www.springframework.org/schema/aop 
    http://www.springframework.org/schema/aop/spring-aop-4.1.xsd
        http://www.springframework.org/schema/mvc 
        http://www.springframework.org/schema/mvc/spring-mvc-4.1.xsd
        http://www.springframework.org/schema/beans 
        http://www.springframework.org/schema/beans/spring-beans-4.1.xsd
        http://www.springframework.org/schema/context 
        http://www.springframework.org/schema/context/spring-context-4.1.xsd
        http://www.springframework.org/schema/aop 
         http://www.springframework.org/schema/aop/spring-aop-4.1.xsd
         http://www.springframework.org/schema/tx 
         http://www.springframework.org/schema/tx/spring-tx-4.1.xsd
        http://www.springframework.org/schema/task 
        http://www.springframework.org/schema/task/spring-task-4.1.xsd" 
        default-lazy-init="true">
    <!-- spring mvc 注解驱动 -->
    <mvc:annotation-driven />
    <!-- 扫描器 -->
    <context:component-scan base-package="com.srie.control" />
    <!-- 配置视图 解析器 -->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="viewClass" value="org.springframework.web.servlet.view.JstlView" />
        <!-- 前缀和后缀 -->
        <property name="prefix" value="/WEB-INF/jsp/"></property>
        <property name="suffix" value=".jsp"></property>
    </bean>

    <!-- 配置使Spring采用CGLIB代理 -->
    <aop:aspectj-autoproxy proxy-target-class="true" />
    
    <!-- 从请求和响应读取/编写字符串 -->
    <bean id="stringHttpMessage" class="org.springframework.http.converter.StringHttpMessageConverter">
        <property name="supportedMediaTypes">
            <list>
                <value>text/plain;charset=UTF-8</value>
            </list>
        </property>
    </bean>

    <!-- 用于将对象转换为JSON -->
    <bean id="jsonConverter" class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter"></bean>

    <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
        <property name="messageConverters">
            <list>
                <ref bean="stringHttpMessage" />
                <ref bean="jsonConverter" />
            </list>
        </property>
    </bean>

    <!-- 日期转换 -->
    <mvc:annotation-driven conversion-service="conversionService"/>
    <bean id="conversionService"
        class="org.springframework.format.support.FormattingConversionServiceFactoryBean">
        <property name="converters">
            <list>
                <!-- <bean class="com.ll.model.StringToPersonConverter" /> -->
            </list>
        </property>
    </bean>
    
</beans>

 =========================================================

controller:

package com.srie.control;

import java.util.HashMap;
import java.util.Map;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

@Controller
@RequestMapping("control")
public class Control {
    
    @RequestMapping("get")
    @ResponseBody
    public Map<String, Object> get(){
        Map<String, Object> res = new HashMap<String, Object>();
        res.put("res", "res from server");
//        int i=1,j=0;
//        int k = i/j;
        return res;
    }
}

切片：

package com.srie.control;

import java.util.Arrays;
import java.util.List;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.After;
import org.aspectj.lang.annotation.AfterReturning;
import org.aspectj.lang.annotation.AfterThrowing;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.springframework.core.annotation.Order;
import org.springframework.stereotype.Component;

@Aspect    //该标签把LoggerAspect类声明为一个切面
@Order(1)  //设置切面的优先级：如果有多个切面，可通过设置优先级控制切面的执行顺序（数值越小，优先级越高）
@Component //该标签把LoggerAspect类放到IOC容器中
public class BalanceAccountAspect {
    /**
     * 定义一个方法，用于声明切入点表达式，方法中一般不需要添加其他代码
     * 使用@Pointcut声明切入点表达式
     * 后面的通知直接使用方法名来引用当前的切点表达式；如果是其他类使用，加上包名即可
     */
    @Pointcut("execution(public * com.srie.control.*.*(..))")
    public void declearJoinPointExpression(){}
    
    /**
     * 前置通知
     * @param joinPoint
     */
    @Before("declearJoinPointExpression()") //该标签声明次方法是一个前置通知：在目标方法开始之前执行
    public void beforMethod(JoinPoint joinPoint){
        String methodName = joinPoint.getSignature().getName();
        List<Object> args = Arrays.asList(joinPoint.getArgs());
        System.out.println("this method "+methodName+" begin. param<"+ args+">");
    }
    /**
     * 后置通知（无论方法是否发生异常都会执行,所以访问不到方法的返回值）
     * @param joinPoint
     */
    @After("declearJoinPointExpression()")
    public void afterMethod(JoinPoint joinPoint){
        String methodName = joinPoint.getSignature().getName();
        System.out.println("this method "+methodName+" end.");
    }
    /**
     * 返回通知（在方法正常结束执行的代码）
     * 返回通知可以访问到方法的返回值！
     * @param joinPoit
     */
    @AfterReturning(value="declearJoinPointExpression()",returning="result")
    public void afterReturnMethod(JoinPoint joinPoint,Object result){
        String methodName = joinPoint.getSignature().getName();
        System.out.println("this method "+methodName+" end.result<"+result+">");
    }
    /**
     * 异常通知（方法发生异常执行的代码）
     * 可以访问到异常对象；且可以指定在出现特定异常时执行的代码
     * @param joinPoint
     * @param ex
     */
    @AfterThrowing(value="declearJoinPointExpression()",throwing="ex")
    public void afterThrowingMethod(JoinPoint joinPoint,Exception ex){
        String methodName = joinPoint.getSignature().getName();
        System.out.println("this method "+methodName+" end.ex message<"+ex+">");
    }
    /**
     * 环绕通知(需要携带类型为ProceedingJoinPoint类型的参数)
     * 环绕通知包含前置、后置、返回、异常通知；ProceedingJoinPoin 类型的参数可以决定是否执行目标方法
     * 且环绕通知必须有返回值，返回值即目标方法的返回值
     * @param joinPoint
     */
    @Around(value="declearJoinPointExpression()")
    public Object aroundMethod(ProceedingJoinPoint point){
        
        Object result = null;
        String methodName = point.getSignature().getName();
        try {
            //前置通知
            System.out.println("The method "+ methodName+" start. param<"+ Arrays.asList(point.getArgs())+">");
            //执行目标方法
            result = point.proceed();
            //返回通知
            System.out.println("The method "+ methodName+" end. result<"+ result+">");
        } catch (Throwable e) {
            //异常通知
            System.out.println("this method "+methodName+" end.ex message<"+e+">");
            throw new RuntimeException(e);
        }
        //后置通知
        System.out.println("The method "+ methodName+" end.");
        return result;
    }
}

web.xml

<!DOCTYPE web-app PUBLIC
 "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
 "http://java.sun.com/dtd/web-app_2_3.dtd" >

<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns="http://java.sun.com/xml/ns/javaee"
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
    id="WebApp_ID" version="2.5">
    <display-name>icd</display-name>
    <!-- spring 监听器 -->
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
    <!-- spring 启动文件 -->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:beans.xml</param-value>
    </context-param>
    <!-- spring mvc 配置 -->
    <servlet>
        <servlet-name>springMVC</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:springmvc.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>springMVC</servlet-name>
        <url-pattern>*.do</url-pattern>
    </servlet-mapping>

    <!-- 解决工程编码过滤器 -->
    <filter>
        <filter-name>characterEncodingFilter</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>characterEncodingFilter</filter-name>
        <url-pattern>*.do</url-pattern>
    </filter-mapping>
    <welcome-file-list>
        <welcome-file>index.jsp</welcome-file>
    </welcome-file-list>
</web-app>

beans.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:aop="http://www.springframework.org/schema/aop" xmlns:beans="http://www.springframework.org/schema/beans" xmlns:context="http://www.springframework.org/schema/context"
    xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:task="http://www.springframework.org/schema/task"
    xsi:schemaLocation="http://www.springframework.org/schema/aop 
    http://www.springframework.org/schema/aop/spring-aop-4.1.xsd
        http://www.springframework.org/schema/mvc 
        http://www.springframework.org/schema/mvc/spring-mvc-4.1.xsd
        http://www.springframework.org/schema/beans 
        http://www.springframework.org/schema/beans/spring-beans-4.1.xsd
        http://www.springframework.org/schema/context 
        http://www.springframework.org/schema/context/spring-context-4.1.xsd
        http://www.springframework.org/schema/aop 
         http://www.springframework.org/schema/aop/spring-aop-4.1.xsd
         http://www.springframework.org/schema/tx 
         http://www.springframework.org/schema/tx/spring-tx-4.1.xsd
        http://www.springframework.org/schema/task 
        http://www.springframework.org/schema/task/spring-task-4.1.xsd" 
        default-lazy-init="true">
    <!-- 扫描服务包 -->
    <context:component-scan base-package="com.srie.service" />
    
    
</beans>

springmvc.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:aop="http://www.springframework.org/schema/aop" xmlns:beans="http://www.springframework.org/schema/beans" xmlns:context="http://www.springframework.org/schema/context"
    xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:task="http://www.springframework.org/schema/task"
    xsi:schemaLocation="http://www.springframework.org/schema/aop 
    http://www.springframework.org/schema/aop/spring-aop-4.1.xsd
        http://www.springframework.org/schema/mvc 
        http://www.springframework.org/schema/mvc/spring-mvc-4.1.xsd
        http://www.springframework.org/schema/beans 
        http://www.springframework.org/schema/beans/spring-beans-4.1.xsd
        http://www.springframework.org/schema/context 
        http://www.springframework.org/schema/context/spring-context-4.1.xsd
        http://www.springframework.org/schema/aop 
         http://www.springframework.org/schema/aop/spring-aop-4.1.xsd
         http://www.springframework.org/schema/tx 
         http://www.springframework.org/schema/tx/spring-tx-4.1.xsd
        http://www.springframework.org/schema/task 
        http://www.springframework.org/schema/task/spring-task-4.1.xsd" 
        default-lazy-init="true">
    <!-- spring mvc 注解驱动 -->
    <mvc:annotation-driven />
    <!-- 扫描器 -->
    <context:component-scan base-package="com.srie.control" />
    <!-- 配置视图 解析器 -->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="viewClass" value="org.springframework.web.servlet.view.JstlView" />
        <!-- 前缀和后缀 -->
        <property name="prefix" value="/WEB-INF/jsp/"></property>
        <property name="suffix" value=".jsp"></property>
    </bean>

    <!-- 配置使Spring采用CGLIB代理 -->
    <aop:aspectj-autoproxy proxy-target-class="true" />
    
    <!-- 从请求和响应读取/编写字符串 -->
    <bean id="stringHttpMessage" class="org.springframework.http.converter.StringHttpMessageConverter">
        <property name="supportedMediaTypes">
            <list>
                <value>text/plain;charset=UTF-8</value>
            </list>
        </property>
    </bean>

    <!-- 用于将对象转换为JSON -->
    <bean id="jsonConverter" class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter"></bean>

    <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
        <property name="messageConverters">
            <list>
                <ref bean="stringHttpMessage" />
                <ref bean="jsonConverter" />
            </list>
        </property>
    </bean>

    <!-- 日期转换 -->
    <mvc:annotation-driven conversion-service="conversionService"/>
    <bean id="conversionService"
        class="org.springframework.format.support.FormattingConversionServiceFactoryBean">
        <property name="converters">
            <list>
                <!-- <bean class="com.ll.model.StringToPersonConverter" /> -->
            </list>
        </property>
    </bean>
    
</beans>