AJAX 跨域调用
前台代码：
Html代码 
<script type="text/javascript" src="jquery-1.7.2.min.js"></script>
<script type="text/javascript">
function RegisterRequest2() {
/* getJSON method is ok also...
$.getJSON("http://192.168.1.154:7087/ClusterServer/Rigister?jsoncallback=?", { pwd: '123', username: 'tl' }, function(json) { alert(json.name); });
*/
$.ajax({
url: "http://192.168.1.154:7087/ClusterServer/Rigister?jsoncallback=?",
type: "GET",
data: { pwd: '123', username: 'tl' },
dataType: "jsonp",
success: function(data) {
alert(data.name);
},
error: function(a, b, c) {
alert("error==" + b);
}
});
}
</script>
<input type="button" onclick="RegisterRequest2();" value="StartRequest" />
后台Servlet代码：
Java代码
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class Rigister extends HttpServlet {
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
String pwd = req.getParameter("pwd");
String username =req.getParameter("username");
System.out.println("get=="+username+" ==="+pwd);
String callback = req.getParameter("jsoncallback");
resp.getWriter().write(callback + "({name:'tzy',phone:'123'})"); //参数为json格式
}
@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
String pwd = req.getParameter("pwd");
String username =req.getParameter("username");
System.out.println("post=="+username+" ==="+pwd);
String callback = req.getParameter("jsoncallback");
resp.getWriter().write(callback + "({name:'tzy',phone:'123'})");
}
}
转载：http://tonl.iteye.com/blog/1682394
Java 跨域 发送请求
package com.nicchagil.httprequestdemo;import java.io.BufferedReader;import java.io.InputStream;import java.io.InputStreamReader;import java.io.OutputStream;import java.io.OutputStreamWriter;import java.net.HttpURLConnection;import java.net.URL;import java.net.URLConnection;public class HttpPostRequest { /**
* Main
* @param args
* @throws Exception
*/
public static void main(String[] args) throws Exception {
System.out.println(doPost());
}
/**
* Post Request
* @return
* @throws Exception */
public static String doPost() throws Exception {
String parameterData = "username=nickhuang&blog=http://www.cnblogs.com/nick-huang/";
URL localURL = new URL("http://localhost:8080/OneHttpServer/");
URLConnection connection = localURL.openConnection();
HttpURLConnection httpURLConnection = (HttpURLConnection)connection;
httpURLConnection.setDoOutput(true);
httpURLConnection.setRequestMethod("POST");
httpURLConnection.setRequestProperty("Accept-Charset", "utf-8");
httpURLConnection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
httpURLConnection.setRequestProperty("Content-Length", String.valueOf(parameterData.length()));
OutputStream outputStream = null;
OutputStreamWriter outputStreamWriter = null;
InputStream inputStream = null;
InputStreamReader inputStreamReader = null;
BufferedReader reader = null;
StringBuffer resultBuffer = new StringBuffer();
String tempLine = null;
try {
outputStream = httpURLConnection.getOutputStream();
outputStreamWriter = new OutputStreamWriter(outputStream);
outputStreamWriter.write(parameterData.toString());
outputStreamWriter.flush();
if (httpURLConnection.getResponseCode() >= 300) { throw new Exception("HTTP Request is not success, Response code is " + httpURLConnection.getResponseCode());
}
inputStream = httpURLConnection.getInputStream();
inputStreamReader = new InputStreamReader(inputStream);
reader = new BufferedReader(inputStreamReader);
while ((tempLine = reader.readLine()) != null) {
resultBuffer.append(tempLine);
}
} finally {
if (outputStreamWriter != null) {
outputStreamWriter.close();
}
if (outputStream != null) {
outputStream.close();
}
if (reader != null) {
reader.close();
}
if (inputStreamReader != null) {
inputStreamReader.close();
}
if (inputStream != null) {
inputStream.close();
}
} return resultBuffer.toString();
}
}转载：http://www.cnblogs.com/nick-huang/p/3859353.html
