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.setDoInput(true);conn.setDoOutput(true);
// 获取URLConnection对象对应的输出流out = new PrintWriter(conn.getOutputStream());
// 发送参数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()));
// 读取请求响应的数据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();
}
// 最后关闭输入、输出流
finally {
try {
if (out != null) {out.close();
}if (in != null) {
in.close();
}} catch (IOException ex) {
ex.printStackTrace();
}
}
return result;
}
/**
* 向指定URL发送GET 方法的请求
*
* @param url
* 发送请求的URL
* @param param
* 请求参数，格式 param1=value1¶m2=value2
* @return
*/
public static String sendGet(String url, String param) {
String result = "";BufferedReader in = null;try {
String urlName = url + "?" + param;URL realUrl = new URL(urlName);
// 打开与url的连接URLConnection conn = realUrl.openConnection();
// 设置通用的属性conn.setRequestProperty("accept", "*/*");conn.setRequestProperty("connection", "Keep-Alive");conn.setRequestProperty("user-agent","Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");// 建立实际的连接conn.connect();// 获取所有相应头字段Map<String, List<String>> map = conn.getHeaderFields();for (String key : map.keySet()) {
System.out.println(key + "------>" + map.get(key));
}
// 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GET请求异常，" + e);e.printStackTrace();
}
// 关闭流finally {
try {if (in != null) {
in.close();
}} catch (IOException e) {
e.printStackTrace();
}
}return result;}
public static void main(String[] args) {
// 发送 GET 请求
String s = HttpTry.sendGet("http://localhost:6144/Home/RequestString","key=123&v=456");
System.out.println(s);
// 发送 POST 请求
String sr = HttpTry.sendPost("http://localhost:6144/Home/RequestPostString","key=123&v=456");
System.out.println(sr);
}
}
版权声明：本文为博主原创文章，未经博主允许不得转载。
原文地址：http://blog.csdn.net/yj_vs_gy/article/details/48031245
