如何在AOP中获取Request和Response对象

在网上看到有不少人说如下方式获取：

1.在web.xml中添加监听

<listener>  
        <listener-class>  
            org.springframework.web.context.request.RequestContextListener  
        </listener-class>  
</listener> 

2.在aop类中有以下两种方式获取

@Autowired  
HttpServletRequest request; //这里可以获取到request

或者

HttpServletRequest request = ((ServletRequestAttributes)RequestContextHolder.getRequestAttributes()).getRequest();

 

但是我试后，发现都获取不到。

既然这样那就要用其他方式获取了。

1. 新建一个存储request、response对象的类

import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import javax.servlet.http.HttpSession;public class SysContent {    private static ThreadLocal<HttpServletRequest> requestLocal = new ThreadLocal<HttpServletRequest>();    private static ThreadLocal<HttpServletResponse> responseLocal = new ThreadLocal<HttpServletResponse>();    public static HttpServletRequest getRequest() {        return (HttpServletRequest) requestLocal.get();    }
    public static void setRequest(HttpServletRequest request) {
        requestLocal.set(request);
    }

    public static HttpServletResponse getResponse() {
        return (HttpServletResponse) responseLocal.get();
    }

    public static void setResponse(HttpServletResponse response) {
        responseLocal.set(response);
    }    public static HttpSession getSession() {        return (HttpSession) ((HttpServletRequest) requestLocal.get()).getSession();    }}

2. 新建一个filter，并在web.xml中添加filter配置

import java.io.IOException;import javax.servlet.Filter;import javax.servlet.FilterChain;import javax.servlet.FilterConfig;import javax.servlet.ServletException;import javax.servlet.ServletRequest;import javax.servlet.ServletResponse;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;public class InitContent implements Filter {    @Override    public void doFilter(ServletRequest arg0, ServletResponse arg1, FilterChain arg2)            throws IOException, ServletException {        SysContent.setRequest((HttpServletRequest) arg0);        SysContent.setResponse((HttpServletResponse) arg1);        arg2.doFilter(arg0, arg1);    }    @Override    public void init(FilterConfig arg0) throws ServletException {    }    @Override    public void destroy() {    }}

web.xml

    <filter>        <filter-name>InitContent</filter-name>        <filter-class>com.*.filter.InitContent</filter-class>    </filter>    <filter-mapping>        <filter-name>InitContent</filter-name>        <url-pattern>/*</url-pattern>    </filter-mapping>

 

这样一来，每次请求的request、response都存在了ThreadLocal中，每次需要的时候从里面获取即可

HttpServletRequest request = SysContent.getRequest();
HttpServletResponse response = SysContent.getResponse();
HttpSession session = SysContent.getSession();