java模拟httppost

Ⅰ java HttpPost怎么传递参数

public class HttpURLConnectionPost {

/**

* @param args

* @throws IOException

*/

public static void main(String[] args) throws IOException {

readContentFromPost();

}

public static void readContentFromPost() throws IOException {

// Post请求的url，与get不同的是不需要带参数

URL postUrl = new URL("http://www.xxxxxxx.com");

// 打开连接

HttpURLConnection connection = (HttpURLConnection) postUrl.openConnection();

// 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

connection.setRequestMethod("POST");

// 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。

connection.connect();

DataOutputStream out = new DataOutputStream(connection

.getOutputStream());

// 正文，正文内容其实跟get的URL中 '? '后的参数字符串一致

String content = "字段名=" + URLEncoder.encode("字符串值", "编码");

// 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

out.writeBytes(content);

//流用完记得关

out.flush();

out.close();

//获取响应

BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));

String line;

while ((line = reader.readLine()) != null){

System.out.println(line);

}

reader.close();

//该干的都干完了,记得把连接断了

connection.disconnect();

}

(1)java模拟httppost扩展阅读：

关于Java HttpURLConnection使用

public static String sendPostValidate(String serviceUrl, String postData, String userName, String password){

PrintWriter out = null;

BufferedReader in = null;

String result = "";

try {

log.info("POST接口地址:"+serviceUrl);

URL realUrl = new URL(serviceUrl);

// 打开和URL之间的连接

URLConnection conn = realUrl.openConnection();

HttpURLConnection httpUrlConnection = (HttpURLConnection) conn;

// 设置通用的请求属性

httpUrlConnection.setRequestProperty("accept","*/*");

httpUrlConnection.setRequestProperty("connection", "Keep-Alive");

httpUrlConnection.setRequestProperty("user-agent","Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");

httpUrlConnection.setRequestMethod("POST");

httpUrlConnection.setRequestProperty("Content-Type","application/json;charset=UTF-8");

Base64 base64 = new Base64();

String encoded = base64.encodeToString(new String(userName+ ":" +password).getBytes());

httpUrlConnection.setRequestProperty("Authorization", "Basic "+encoded);

// 发送POST请求必须设置如下两行

httpUrlConnection.setDoOutput(true);

httpUrlConnection.setDoInput(true);

// 获取URLConnection对象对应的输出流

out = new PrintWriter(new OutputStreamWriter(httpUrlConnection.getOutputStream(),"utf-8"));

// 发送请求参数

out.print(postData);

out.flush();

// 定义BufferedReader输入流来读取URL的响应

in = new BufferedReader(new InputStreamReader(httpUrlConnection.getInputStream(),"utf-8"));

String line;

while ((line = in.readLine()) != null) {

result += line;

}

//

// if (!"".equals(result)) {

// BASE64Decoder decoder = new BASE64Decoder();

// try {

// byte[] b = decoder.decodeBuffer(result);

// result = new String(b, "utf-8");

// } catch (Exception e) {

// e.printStackTrace();

// }

// }

return result;

} catch (Exception e) {

log.info("调用异常",e);

throw new RuntimeException(e);

}

//使用finally块来关闭输出流、输入流

finally{

try{

if(out!=null){

out.close();

}

if(in!=null){

in.close();

}

}

catch(IOException e){

log.info("关闭流异常",e);

}

}

}

}

Ⅱ java实现socks5代理功能的客户端,模拟浏览器进行HTTP POST提交

SocketAddress addr = new InetSocketAddress(sProxyAddr,Integer.valueOf(sProxyPort));
Proxy proxy = new Proxy(Proxy.Type.SOCKS, addr);
socket = new Socket(proxy);
socket.connect(new InetSocketAddress(ip, port));