java发送请求,java发送请求怎么添加服务注册

本文目录一览：

• 1、java中怎样用post，get，put请求
• 2、如何使用java 发送post请求
• 3、求教java程序怎么向网页服务器发送请求

java中怎样用post，get，put请求

java中用post，get，put请求方法：

public static String javaHttpGet(String url,String charSet){

String resultData = null;

try {

URL pathUrl = new URL(url); //创建一个URL对象

HttpURLConnection urlConnect = (HttpURLConnection) pathUrl.openConnection(); //打开一个HttpURLConnection连接

urlConnect.setConnectTimeout(30000); // 设置连接超时时间

urlConnect.connect();

if (urlConnect.getResponseCode() == 200) { //请求成功

resultData = readInputStream(urlConnect.getInputStream(), charSet);

}

} catch (MalformedURLException e) {

LogL.getInstance().getLog().error(“URL出错！”, e);

} catch (IOException e) {

LogL.getInstance().getLog().error(“读取数据流出错！”, e);

}

return resultData;

}

public static String javaHttpPost(String url,MapString,Object map,String charSet){

String resultData=null;

StringBuffer params = new StringBuffer();

try {

IteratorEntryString, Object ir = map.entrySet().iterator();

while (ir.hasNext()) {

Map.EntryString, Object entry = (Map.EntryString, Object) ir.next();

params.append(URLEncoder.encode(entry.getKey(),charSet) + “=” + URLEncoder.encode(entry.getValue().toString(), charSet) + “”);

}

byte[] postData = params.deleteCharAt(params.length()).toString().getBytes();

URL pathUrl = new URL(url); //创建一个URL对象

HttpURLConnection urlConnect = (HttpURLConnection) pathUrl.openConnection();

urlConnect.setConnectTimeout(30000); // 设置连接超时时间

urlConnect.setDoOutput(true); //post请求必须设置允许输出

urlConnect.setUseCaches(false); //post请求不能使用缓存

urlConnect.setRequestMethod(“POST”); //设置post方式请求

urlConnect.setInstanceFollowRedirects(true);

urlConnect.setRequestProperty(“Content-Type”,”application/x-www-form-urlencoded; charset=”+charSet);// 配置请求Content-Type

urlConnect.connect(); // 开始连接

DataOutputStream dos = new DataOutputStream(urlConnect.getOutputStream()); // 发送请求参数

dos.write(postData);

dos.flush();

dos.close();

if (urlConnect.getResponseCode() == 200) { //请求成功

resultData = readInputStream(urlConnect.getInputStream(),charSet);

}

} catch (MalformedURLException e) {

LogL.getInstance().getLog().error(“URL出错！”, e);

} catch (IOException e) {

LogL.getInstance().getLog().error(“读取数据流出错！”, e);

} catch (Exception e) {

LogL.getInstance().getLog().error(“POST出错！”, e);

}

return resultData;

}

如何使用java 发送post请求

/**

* 向指定 URL 发送POST方法的请求

*

* @param url

* 发送请求的 URL

* @param param

* 请求参数，请求参数应该是 name1=value1name2=value2 的形式。

* @return 所代表远程资源的响应结果

*/

public static String sendPost(String url, String param) {

PrintWriter out = null;

BufferedReader in = null;

String result = “”;

try {

URL realUrl = new URL(url);

// 打开和URL之间的连接

URLConnection conn = realUrl.openConnection();

// 设置通用的请求属性

conn.setRequestProperty(“accept”, “*/*”);

conn.setRequestProperty(“connection”, “Keep-Alive”);

conn.setRequestProperty(“user-agent”,

“Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)”);

// 发送POST请求必须设置如下两行

conn.setDoOutput(true);

conn.setDoInput(true);

// 获取URLConnection对象对应的输出流

out = new PrintWriter(conn.getOutputStream());

// 发送请求参数

out.print(param);

// flush输出流的缓冲

out.flush();

// 定义BufferedReader输入流来读取URL的响应

in = new BufferedReader(

new InputStreamReader(conn.getInputStream()));

String line;

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

result += line;

}

} catch (Exception e) {

System.out.println(“发送 POST 请求出现异常！”+e);

e.printStackTrace();

}

//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 ex){

ex.printStackTrace();

}

}

return result;

}

求教java程序怎么向网页服务器发送请求

POST方式发送请求示例： String fullurl = url; //打开连接 URLConnection conn =new URL(fullurl).openConnection(); //设置通用的请求属性 conn.setRequestProperty(“accept”, “*/*”); conn.setRequestProperty(“connection”, “Keep-Alive”); conn.setRequestProperty(“user-agent”, “Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/42.0.2311.90 Safari/537.36”); //发送POST请求必须设置下面两行 conn.setDoInput(true); conn.setDoOutput(true); try ( //获取URLConnection对象对应的输出流 PrintWriter out = new PrintWriter(conn.getOutputStream());) { out.print(parm);//发送请求参数(key1=value1key2=value2) out.flush();//flush输出流的缓冲 } catch (Exception e) {} //获取响应头字段 MapString, ListString map = conn.getHeaderFields(); //根据输入流读取响应数据 InputStream is = conn.getInputStream();