1、利用apache提供的commons-httpclient-3.0.jar包
代码如下:
/**
* 利用HttpClient发起POST请求,并接收返回的响应内容
*
* @param url 请求链接
* @param type 交易或响应编号
* @param message 请求内容
* @return 响应内容
*/
public String transRequest(String url, String type, String message) {
// 响应内容
String result = "";
// 定义http客户端对象--httpClient
HttpClient httpClient = new HttpClient();
// 定义并实例化客户端链接对象-postMethod
PostMethod postMethod = new PostMethod(url);
try{
// 设置http的头
postMethod.setRequestHeader("ContentType", "application/x-www-form-urlencoded;charset=UTF-8");
// 填入各个表单域的值
NameValuePair[] data = { new NameValuePair("type", type), new NameValuePair("message", message) };
// 将表单的值放入postMethod中
postMethod.setRequestBody(data);
// 定义访问地址的链接状态
int statusCode = 0;
try
{
// 客户端请求url数据
statusCode = httpClient.executeMethod(postMethod);
}
catch (Exception e)
{
e.printStackTrace();
}
// 请求成功状态-200
if (statusCode == HttpStatus.SC_OK) {
try {
result = postMethod.getResponseBodyAsString();
} catch (IOException e) {
e.printStackTrace();
}
} else {
log.error("请求返回状态:" + statusCode);
}
} catch (Exception e) {
log.error(e.getMessage(), e);
} finally {
// 释放链接
postMethod.releaseConnection();
httpClient.getHttpConnectionManager().closeIdleConnections(0);
}
return result;
}
2、利用java自带的java.net.*包下提供的工具类
代码如下:
/**
* 利用URL发起POST请求,并接收返回信息
*
* @param url 请求URL
* @param message 请求参数
* @return 响应内容
*/
@Override
public String transport(String url, String message)
{
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 = 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();
}
catch (Exception e)
{
log.error(e.getMessage(), e);
}
return sb.toString();
}