1.Java发送Post请求方法，指定Url发送String类型数据，直接从代码里抠出来的，不必要的代码可自行注掉。
/**
* post请求
*
* @param url
* post的url地址
* @param body
* 要post的数据
* @return
* @throws IOException
*/
public static String post(String url, String body)
{
// 入参校验
if (url == null || body == null)
return "请填写正确参数!";
// 构造请求数据
Map<String, String> headers = createHeaders(body);
/*System.out.println("url:\r\n" + url);
System.out.println("body:\r\n" + body);
System.out.println("headers:\r\n" + headers);*/
String result = "";
try
{
OutputStreamWriter out = null;
BufferedReader in = null;
URL realUrl = new URL(url);
URLConnection conn = realUrl.openConnection();
// 添加请求头
Set<String> keys = headers.keySet();
for (String key : keys)
{
conn.setRequestProperty(key, headers.get(key));
}
// 设置连接参数
conn.setDoOutput(true);
conn.setDoInput(true);
conn.setConnectTimeout(4000);
conn.setReadTimeout(5000);
// 提交数据
out = new OutputStreamWriter(conn.getOutputStream(), "UTF8");
out.write(body);
out.flush();
// 读取返回数据
in = new BufferedReader(new InputStreamReader(conn.getInputStream(), "UTF8"));
String line = "";
while ((line = in.readLine()) != null)
{
result += "\n";
result += line;
}
} catch (Exception e)
{
e.printStackTrace();
}
return result;
}
2.差不多一样的代码，GET和POST，直接用
package com.fisee.map;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.URL;
import java.net.URLConnection;
import java.util.List;
import java.util.Map;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
public class HttpRequest {
static ExecutorService fixedThreadPool = Executors.newFixedThreadPool(8);
/**
* 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，请求参数应该是 name1=value1&name2=value2 的形式。
* @return URL 所代表远程资源的响应结果
*/
public static String sendGet(final String url, final String param) {
//System.err.println("url==="+url);
//System.out.println("MSG==="+param);
final StringBuilder sb = new StringBuilder(120);
final CountDownLatch latch = new CountDownLatch(1);
fixedThreadPool.execute(new Runnable() {
@Override
public void run() {
//String result = "";
BufferedReader in = null;
try {
String urlNameString = url + "?" + param;
URL realUrl = new URL(urlNameString);
// 打开和URL之间的连接
URLConnection connection = realUrl.openConnection();
// 设置通用的请求属性
connection.setRequestProperty("accept", "application/json");
connection.setRequestProperty("connection", "Keep-Alive");
connection.setRequestProperty("user-agent",
"Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
connection.setConnectTimeout(4000);
connection.setReadTimeout(15000);
// 建立实际的连接
connection.connect();
// 获取所有响应头字段
/*Map<String, List<String>> map = connection.getHeaderFields();
// 遍历所有的响应头字段
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(
connection.getInputStream()));
String line;
while ((line = in.readLine()) != null) {
//result += line;
sb.append(line);
}
} catch (Exception e) {
System.out.println("com.fisee.map.HttpRequest发送GET请求出现异常！");
//e.printStackTrace();
}
// 使用finally块来关闭输入流
finally {
try {
if (in != null) {
in.close();
}
} catch (Exception e2) {
e2.printStackTrace();
}
latch.countDown();
}
// return result;
}
});
try {
latch.await();
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return sb.toString();
}
/**
* 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=value1&name2=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;
}
public static void main(String[] args) {
/* //发送 GET 请求
String s=HttpRequest.sendGet("http://localhost:6144/Home/RequestString", "key=123&v=456");
System.out.println(s);
//发送 POST 请求
String sr=HttpRequest.sendPost("http://localhost:6144/Home/RequestPostString", "key=123&v=456");
System.out.println(sr);*/
}
}
