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分享http post 发送请求，没有返回结果
通过http post向服务端发出请求，没有返回结果，哪里出了问题。
服务端servlet:
客户端avajava:
服务端servlet:
package myBean;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServlet;
public class AcceptForm extends HttpServlet {
private static final long serialVersionUID = 1L;
public void init() throws ServletException {
// Put your code here
}
public void service(ServletRequest req,ServletResponse response)
throws ServletException,IOException
{
String username=req.getParameter("message");
String strs=new HttpUtil().httpPost("张**","150429197*1X","6225880122*2","1352*5");
System.out.println(strs);
System.out.flush();
System.out.close();
}
}
客户端avajava:
import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;
public class test1 {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
String url = "http://112.125.122.8:8080/webtest2/AcceptForm";
String message="1MGU1MjUyNWZhZjJiYjcy";
StringBuffer sb = new StringBuffer();
try {
URL urls = new URL(url);
HttpURLConnection uc = (HttpURLConnection) urls.openConnection();
uc.setRequestMethod("POST");
uc.setRequestProperty("content-type",
"application/x-www-form-urlencoded");
uc.setRequestProperty("charset", "UTF-8");
uc.setDoOutput(true);
uc.setDoInput(true);
uc.setReadTimeout(10000);
uc.setConnectTimeout(10000);
OutputStream os = (OutputStream) uc.getOutputStream();
DataOutputStream dos = new DataOutputStream(os);
dos.write(message.getBytes("utf-8"));
dos.flush();
os.close();
BufferedReader in = new BufferedReader(new InputStreamReader(uc.getInputStream(), "utf-8"));
String readLine = "";
while ((readLine = in.readLine()) != null) {
sb.append(readLine);
}
in.close();
System.out.println("结果: "+sb.toString());
} catch (Exception e) {
e.printStackTrace();
}
}
}
...全文
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MamyA 2016-03-18
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doPost和doGet只是区分http操作的不同类型罢了，最后都会到service方法的，所以你写在service中是可以的。这个是一定的，在javax中有定义的。
另外HttpServlet要想输出结果出去，是需要格式化输出流的，如OutputStream，PrintWriter等，不能用系统输出通道，这个是不能输出到请求端的。
如果确认输出通道没问题，而且已进入service方法，那就检查
String strs=new HttpUtil().httpPost("张**","150429197*1X","6225880122*2","1352*5");
这段代码是否有返回值strs。。
代码间的舞者 2016-03-17
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回答十楼的问题，
你应该去确认服务端这段代码有没有返回值！
String strs=new HttpUtil().httpPost("张**","150429197*1X","6225880122*2","1352*5");
zhangfengyi 2016-03-16
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OK
kx00450 2016-03-16
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1、你客户端请求使用post， 服务器端 代码需要放在dopost 中，
2、客户端没有得到数据是你服务端没有返回数据，需要用response 输出
如
response.getWriter().print("123123");
才能在客户端 OutputStream os = (OutputStream) uc.getOutputStream(); 中获取数据。
Intboy 2016-03-16
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String username=req.getParameter("message");
String strs=new HttpUtil().httpPost("张**","150429197*1X","6225880122*2","1352*5");
System.out.println(strs);
System.out.flush();
System.out.close();
[/quote]
你先看看我给你的参考资料[/quote]估计你给的资料太长了。。。
家里敷泥呀 2016-03-16
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String username=req.getParameter("message");
String strs=new HttpUtil().httpPost("张**","150429197*1X","6225880122*2","1352*5");
System.out.println(strs);
System.out.flush();
System.out.close();
家里敷泥呀 2016-03-16
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String username=req.getParameter("message");
String strs=new HttpUtil().httpPost("张**","150429197*1X","6225880122*2","1352*5");
System.out.println(strs);
System.out.flush();
System.out.close();
zhangfengyi 2016-03-16
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String username=req.getParameter("message");
String strs=new HttpUtil().httpPost("张**","150429197*1X","6225880122*2","1352*5");
System.out.println(strs);
System.out.flush();
System.out.close();
家里敷泥呀 2016-03-16
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你的doPost()如何实现的？
参考：
javaweb学习总结(五)——Servlet开发(一) - 孤傲苍狼 - 博客园
http://www.cnblogs.com/xdp-gacl/p/3760336.html
zhangfengyi 2016-03-16
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放在DoPost方法中也是相同的结果，着急啊。。。。。。
tianfang 2016-03-16
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servlet 处理POST需要写在post方法中，实现HttpServlet方法
zhangfengyi 2016-03-16
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客户端sb.toString值为null, 是不是服务端String username=request.getParameter("message");没有接收到上送信息
import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;
public class test1 {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
String url = "http://112.125.122.8:8080/webtest2/AcceptForm";
String message="1MGU1MjUyNWZhZjJiYjcy";
StringBuffer sb = new StringBuffer();
try {
URL urls = new URL(url);
HttpURLConnection uc = (HttpURLConnection) urls.openConnection();
uc.setRequestMethod("POST");
uc.setRequestProperty("content-type",
"application/x-www-form-urlencoded");
uc.setRequestProperty("charset", "UTF-8");
uc.setDoOutput(true);
uc.setDoInput(true);
uc.setReadTimeout(10000);
uc.setConnectTimeout(10000);
OutputStream os = (OutputStream) uc.getOutputStream();
DataOutputStream dos = new DataOutputStream(os);
dos.write(message.getBytes("utf-8"));
dos.flush();
os.close();
BufferedReader in = new BufferedReader(new InputStreamReader(uc.getInputStream(), "utf-8"));
String readLine = "";
while ((readLine = in.readLine()) != null) {
sb.append(readLine);
}
in.close();
System.out.println("结果: "+sb.toString());
} catch (Exception e) {
e.printStackTrace();
}
}
}
