这是我的一个JSP页面的完整代码:
<%@ page contentType="text/plain; charset=UTF-8"%>
<%@ page language="java"%>
<%@ page import="org.apache.commons.httpclient.*,org.apache.commons.httpclient.methods.GetMethod"%>
<%
out.clear(); String url = request.getParameter("url");
HttpClient client = new HttpClient();
GetMethod method = new GetMethod(url);
try {
client.executeMethod(method);
out.print(method.getResponseBodyAsString());
} catch (Exception e) {
} finally {
method.releaseConnection();
}
%>
建的个web service project,相关包不缺。这个页面可以出来,但是我测试发现取的URL参数为“null”.
写了个java测试类:
public class Test{
public static void main(String[] args){
HttpClient client = new HttpClient();
String url;
try {
if (url == null) {
System.out.println("取到的url参数为空");
} else {
url = request.getParameter("url");//这个地方报错为"request canot be resolved"
}
} catch (Exception e) {
// TODO: handle exception
}
GetMethod get=new GetMethod(url);
try{
client.executeMethod(get);
}catch(Exception e){
}finally{
get.releaseConnection();
}
}这是什么原因啊?那位大虾能指教下,谢谢了!
<%@ page contentType="text/plain; charset=UTF-8"%>
<%@ page language="java"%>
<%@ page import="org.apache.commons.httpclient.*,org.apache.commons.httpclient.methods.GetMethod"%>
<%
out.clear(); String url = request.getParameter("url");
HttpClient client = new HttpClient();
GetMethod method = new GetMethod(url);
try {
client.executeMethod(method);
out.print(method.getResponseBodyAsString());
} catch (Exception e) {
} finally {
method.releaseConnection();
}
%>
建的个web service project,相关包不缺。这个页面可以出来,但是我测试发现取的URL参数为“null”.
写了个java测试类:
public class Test{
public static void main(String[] args){
HttpClient client = new HttpClient();
String url;
try {
if (url == null) {
System.out.println("取到的url参数为空");
} else {
url = request.getParameter("url");//这个地方报错为"request canot be resolved"
}
} catch (Exception e) {
// TODO: handle exception
}
GetMethod get=new GetMethod(url);
try{
client.executeMethod(get);
}catch(Exception e){
}finally{
get.releaseConnection();
}
}这是什么原因啊?那位大虾能指教下,谢谢了!
楼主【ys2001】截止到2008-07-22 20:43:08的历史汇总数据(不包括此帖):
发帖的总数量:0 发帖的总分数:0 每贴平均分数:0
回帖的总数量:0 得分贴总数量:0 回帖的得分率:0%
结贴的总数量:0 结贴的总分数:0
无满意结贴数:0 无满意结贴分:0
未结的帖子数:0 未结的总分数:0
结贴的百分比:---------------------结分的百分比:---------------------
无满意结贴率:---------------------无满意结分率:---------------------
如何结贴请参考这里:http://topic.csdn.net/u/20080501/09/ef7ba1b3-6466-49f6-9d92-36fe6d471dd1.html
<%@ page contentType="text/plain; charset=UTF-8"%>
<%@ page language="java"%>
<%@ page import="org.apache.commons.httpclient.*,org.apache.commons.httpclient.methods.GetMethod"%>
<%
out.clear(); String url = request.getParameter("url");
HttpClient client = new HttpClient();
GetMethod method = new GetMethod(url);
try {
client.executeMethod(method);
out.print(method.getResponseBodyAsString());
} catch (Exception e) {
} finally {
method.releaseConnection();
}
%> 你把这个页面的所有 空格和回车<%%>之间的空格和回车<%%>空格和回车 都去掉。就好了,类似于这样:
<%@ page contentType="text/plain; charset=UTF-8"%><%@ page language="java"%><%@ page import="org.apache.commons.httpclient.*,org.apache.commons.httpclient.methods.GetMethod"%><%
out.clear(); String url = request.getParameter("url");
HttpClient client = new HttpClient();
GetMethod method = new GetMethod(url);
try {
client.executeMethod(method);
out.print(method.getResponseBodyAsString());
} catch (Exception e) {
} finally {
method.releaseConnection();
}
%>
<%%>外面的空格回车都去掉
“String url = request.getParameter("url");”取到的参数是空的,我想取到用户访问的url地址
这个是为了:在用户访问URL的时候,清空用户访问的url,,,加载进自己想要的url.
不记得是哪一个的函数了.可以取到URL.不太记得是哪个了.getParameter("url")可以?这个url在哪定义的啊?
String url = "http://" + request.getServerName() + ":" + request.getServerPort() + request.getContextPath()+request.getServletPath().substring(0,request.getServletPath().lastIndexOf("/")+1);
System.out.println("web URL 路径:"+url);
%>
String url=request.getScheme()+"://";
url+=request.getHeader("host");
url+=request.getRequestURI();
if(request.getQueryString()!=null)
url+="?"+request.getQueryString();
out.println(url);
%>