Java 请求webServce接口 带参数

public String getWebServiceByParams(String param){ //获取基金缴付记录
// Post请求的url，与get不同的是不需要带参数
URL postUrl = null;
try {
postUrl = new URL(""); //***这里写webService接口地址
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
// 打开连接
HttpURLConnection connection = null;
try {
connection = (HttpURLConnection) postUrl.openConnection();
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
// 设置是否向connection输出，因为这个是post请求，参数要放在
// http正文内，因此需要设为true
connection.setDoOutput(true);
// Read from the connection. Default is true.
connection.setDoInput(true);
// 默认是 GET方式
try {
connection.setRequestMethod("POST");
} catch (ProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
// Post 请求不能使用缓存
connection.setUseCaches(false);
//设置本次连接是否自动重定向
connection.setInstanceFollowRedirects(true);
// 配置本次连接的Content-type，配置为application/x-www-form-urlencoded的
// 意思是正文是urlencoded编码过的form参数
connection.setRequestProperty("Content-Type","application/x-www-form-urlencoded");
// 连接，从postUrl.openConnection()至此的配置必须要在connect之前完成，
// 要注意的是connection.getOutputStream会隐含的进行connect。
try {
connection.connect();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
DataOutputStream out = null;
try {
out = new DataOutputStream(connection
.getOutputStream());
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
// 正文，正文内容其实跟get的URL中 '? '后的参数字符串一致
String content = null;
try {
content = "createDate=" + URLEncoder.encode(param, "UTF-8"); //这里改成你的参数名字
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
// DataOutputStream.writeBytes将字符串中的16位的unicode字符以8位的字符形式写到流里面
try {
out.writeBytes(content);
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
//流用完记得关
try {
out.flush();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try {
out.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
//获取响应
BufferedReader reader = null;
try {
reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
String line = null;
// while ((line = reader.readLine()) != null){
// System.out.println("line---?"+line);
//
// }
try {
line = reader.readLine();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
System.out.println("line---?"+line); try {
reader.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
//该干的都干完了,记得把连接断了
connection.disconnect();
return line;
}