在我的项目中，我想在Spring MVC中应用AOP。并在网页中显示输出。但无法显示并无法在控制器类中应用建议。
Logging.java： -
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.After;
import org.aspectj.lang.annotation.AfterThrowing;
import org.aspectj.lang.annotation.AfterReturning;
import org.aspectj.lang.annotation.Around;
import org.springframework.stereotype.Component;
@Aspect
public class Logging {
/** Following is the definition for a pointcut to select
* all the methods available. So advice will be called
* for all the methods.
*/
@Pointcut("execution(* com.*.*(..))")
private void selectAll(){}
/**
* This is the method which I would like to execute
* before a selected method execution.
*/
@Before("selectAll()")
public void beforeAdvice(){
System.out.println("Going to setup student profile.");
}
/**
* This is the method which I would like to execute
* after a selected method execution.
*/
@After("selectAll()")
public void afterAdvice(){
System.out.println("Student profile has been setup.");
}
/**
* This is the method which I would like to execute
* when any method returns.
*/
@AfterReturning(pointcut = "selectAll()", returning="retVal")
public void afterReturningAdvice(Object retVal){
System.out.println("Returning:" + retVal.toString() );
}
/**
* This is the method which I would like to execute
* if there is an exception raised by any method.
*/
@AfterThrowing(pointcut = "selectAll()", throwing = "ex")
public void AfterThrowingAdvice(IllegalArgumentException ex){
System.out.println("There has been an exception: " + ex.toString());
}
@Around("selectAll()")
public Object aroundAdvice(ProceedingJoinPoint p) throws Throwable{
System.out.println("Before around");
Object o=p.proceed();
System.out.println("After around");
return o;
}
}
pojo类 Student.java： -
public class Student {
private Integer age;
private String name;
public void setAge(Integer age) {
this.age = age;
}
public Integer getAge() {
System.out.println("Age : " + age );
return age;
}
public void setName(String name) {
this.name = name;
}
public String getName() {
System.out.println("Name : " + name );
return name;
}
}
UserController.java
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.context.support.FileSystemXmlApplicationContext;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.Controller;
public class UserController implements Controller {
public ModelAndView handleRequest(HttpServletRequest arg0,
HttpServletResponse arg1) throws Exception
{
ApplicationContext context =
new FileSystemXmlApplicationContext("C:/Users/pcuser/Desktop/zspringmvcannotation/WebContent/WEB-INF/applicationContext.xml");
Student student = (Student) context.getBean("student");
student.getName();
student.getAge();
return new ModelAndView("success","student",student);
// return new ModelAndView("/WEB-INF/jsp/success.jsp");
}
}
的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" xmlns:context="http://www.springframework.org/schema/context"
xmlns:aop="http://www.springframework.org/schema/aop" xmlns:p="http://www.springframework.org/schema/p"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd">
<bean p:suffix=".jsp" p:prefix="/WEB-INF/jsp/"
class="org.springframework.web.servlet.view.InternalResourceViewResolver"
id="viewResolver" />
<!-- AOP support -->
<bean id="logging" class="Logging" />
<aop:aspectj-autoproxy>
<aop:include name='logging' />
</aop:aspectj-autoproxy>
<!-- Definition for student bean -->
<bean id="student" class="Student">
<property name="name" value="Tapajyoti" />
<property name="age" value="22" />
</bean>
<bean id="userController" class="UserController" />
<bean id="urlMapping"
class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
<property name="mappings">
<props>
<prop key="/hello.htm">userController</prop>
</props>
</property>
</bean>
</beans>
分配器一servlet.xml中
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">
<beans>
<import resource="applicationContext.xml"></import>
</beans>
Web.xml中
<?xml version="1.0" encoding="UTF-8"?>
<web-app id="WebApp_ID" version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
<display-name>
SpringMVC</display-name>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/applicationContext.xml</param-value>
</context-param>
<servlet>
<servlet-name>dispatcher</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>dispatcher</servlet-name>
<url-pattern>*.htm</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>index.html</welcome-file>
</welcome-file-list>
</web-app>
答案 0 :(得分：0)
我同意M.Deinum，请首先纠正这些说明。此外，您应该删除Dispatcher-servlet.xml，因为您有一个FileSystemXmlApplicationContext并且已经在那里加载了xml中的所有bean。然后请删除＆lt; listener＆gt;和＆lt; context-param＆gt; web.xml中的元素并按如下方式配置您的方面：
<aop:aspectj-autoproxy />
<!-- Aspect -->
<bean id="loggingAspect" class="Logging" />