spring aop 获取request、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();