版权声明:原创 https://blog.csdn.net/hangvane123/article/details/82933604
源码取自某短信平台,不依赖第三方库,无异常处理代码,仅供参考
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.URL;
import java.net.URLConnection;
public class HttpRequest {
/**
* 向指定 URL 发送POST方法的请求
*
* @param url
* 发送请求的 URL
* @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;
}
}
测试一下:
System.out.println(HttpRequest.sendPost("http://httpbin.org/post", "abc"));
返回值:
{
"args": { },
"data": "",
"files": { },
"form": {
"abc": ""
},
"headers": {
"Accept": "*/*",
"Connection": "close",
"Content-Length": "3",
"Content-Type": "application/x-www-form-urlencoded",
"Host": "httpbin.org",
"User-Agent": "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)"
},
"json": null,
"origin": "111.11.1.111",
"url": "http://httpbin.org/post"
}
测试成功!