Qaf*_*qaz 1 java jsp httprequest
当我从JSP发送请求时,我使用此代码
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<form method="post" action="http://translate.intelsoft.az" id="tform" name="ftext">
<input class="gogo1" value="a" name="l" id="l1" /> <div class="il">
<p>Rusca</p>
<textarea class="ilkin1" name="t" id="t1" >
???????????????????
???????????????????
???????????????????
???????????????????</textarea>
<div><input class="gogo" type="submit" value="T?rcüm?1" name="b1" /></div></div> </form>
</body>
</html>
并且响应是正确的,以便我看到参数的值.但是当我从Java发送时,我没有得到正确的答复.我认为参数没有正确发送.这是我的Java代码:
String urlParameters = "t=???????????????????&l=a";
String request = "http://translate.intelsoft.az";
URL url = null;
try {
url = new URL(request);
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
HttpURLConnection connection = null;
try {
connection = (HttpURLConnection) url.openConnection();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
connection.setDoOutput(true);
connection.setDoInput(true);
connection.setInstanceFollowRedirects(false);
try {
connection.setRequestMethod("POST");
} catch (ProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
connection.setRequestProperty("Content-Type", "text/html");
connection.setRequestProperty("charset", "utf-8");
connection.setRequestProperty("Content-Length", "" + Integer.toString(urlParameters.getBytes().length));
connection.setUseCaches (false);
DataOutputStream wr;
try {
wr = new DataOutputStream(connection.getOutputStream ());
wr.writeBytes(urlParameters);
wr.flush();
BufferedReader rd = new BufferedReader(new InputStreamReader(connection.getInputStream()));
String line;
while ((line = rd.readLine()) != null) {
System.out.println(line);
}
wr.close();
connection.disconnect();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
这有什么不对？
首先,您的JSP页面使用UTF-8字符编码.
<%@ page ... pageEncoding="UTF-8"%>
但是,您的Java代码未使用相同的字符编码.
DataOutputStream wr;
try {
wr = new DataOutputStream(connection.getOutputStream ());
wr.writeBytes(urlParameters); // <--- Wrong! Uses platform default encoding.
wr.flush();
你需要更换那个麻烦的作品
try {
connection.getOutputStream().write(urlParameters.getBytes("UTF-8"));
请注意,整个DataOutputStream装饰是不必要的.它有一个完全不同的目的(即写入.dat类型文件).不要忘记在设置Content-Length标题的方式中指定相同的字符集.
其次,参数名称/值本身应该是URL编码的,以便从HTTP请求中正确提取.
String urlParameters = "t=" + URLEncoder.encode("???????????????????", "UTF-8")
+ "&l=" + URLEncoder.encode("a", "UTF-8");
第三,您的请求标头实际上也是错误的:
connection.setRequestProperty("Content-Type", "text/html");
connection.setRequestProperty("charset", "utf-8");
您根本不发送text/html数据.您正在发送application/x-www-form-urlencoded数据.此外,这charset应该是Content-Type标题的属性,因此:
connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded;charset=UTF-8");
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