首先，创建一个HttpRequest工具类
package com.bonc.common.utils;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.net.URL;
import java.net.URLConnection;
import java.util.List;
import java.util.Map;
public class HttpRequest {
/**
* 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(String url, String param) {
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", "*/*");
connection.setRequestProperty("connection", "Keep-Alive");
connection.setRequestProperty("user-agent",
"Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
// 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;
}
} catch (Exception e) {
System.out.println("发送GET请求出现异常！" + e);
e.printStackTrace();
}
// 使用finally块来关闭输入流
finally {
try {
if (in != null) {
in.close();
}
} catch (Exception e2) {
e2.printStackTrace();
}
}
return result;
}
/**
* 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", "application/json, text/javascript, */*; q=0.01");
conn.setRequestProperty("Accept-Encoding", "gzip, deflate");
conn.setRequestProperty("Connection", "keep-alive");
conn.setRequestProperty("Accept-Language", "zh-CN,zh;q=0.8");
conn.setRequestProperty("Content-Length", "80");
conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded; charset=UTF-8");
conn.setRequestProperty("User-Agent", "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/52.0.2743.116 Safari/537.36");
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
OutputStreamWriter outWriter = new OutputStreamWriter(conn.getOutputStream(), "utf-8");
out = new PrintWriter(outWriter);
// 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(),"UTF-8"));
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://www.cheshouye.com/api/weizhang/get_all_config","");
JSONObject jsStr = JSONObject.fromObject(sr);
JSONArray jsonarray = jsStr.getJSONArray("configs");
for(int i=0;i<jsonarray.size();i++){
JSONObject ob1=(JSONObject)jsonarray.get(i);
Integer provinceId=ob1.getInt("provice_id");
String provinceName=ob1.getString("provice_name");
String provinceShortName=ob1.getString("provice_short_name");
JSONArray jsonarray2 = ob1.getJSONArray("citys");
}
System.out.println(jsonarray);*/
//(JSONObject)jsonarray[i]
}
}
然后在java方法中调用即可。第一个参数是地址，第二个是需要传输的参数，需要把传输的参数转化成字符串。然后会把结果返回
Map<String,String> p=new HashMap<>();
p.put("pushType","ALIAS");
p.put("alert",re);
p.put("target",userId);
p.put("msgCode","1005");
p.put("orderNum","");
p.put("activityId",id);
String s="";
for (Map.Entry<String, String> entry : p.entrySet()) {
s+="&"+entry.getKey()+"="+entry.getValue();
}
s=s.substring(1);
String sr= HttpRequest.sendPost("http://112.64.35.222:9002/itcast/jpush/push",s);
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