Java的http工具
代码:
package net.pushi.neo4jdata.util;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;
import org.springframework.util.StringUtils;
public class HttpClients {
public static String doGet(String url){
try{
String paramString = "";
int pos = url.indexOf("?");
if(pos!=-1){
paramString = url.substring(pos+1, url.length());
url = url.substring(0, pos);
}
return doGet(url,paramString);
}catch(Exception e){
e.printStackTrace();
}
return "[{\"code\":500}]";
}
/**
* 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 doGet(String url, String param) {
String result = "";
try {
String urlNameString = url + "?" + param;
URL realUrl = new URL(urlNameString);
// 打开和URL之间的连接
HttpURLConnection connection = (HttpURLConnection)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)");
connection.setRequestProperty("NAME", "X-Mailer");
// 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));
// }
int resultCode = connection.getResponseCode();
// 定义 BufferedReader输入流来读取URL的响应
if(resultCode<300){
BufferedReader in = new BufferedReader(new InputStreamReader(
connection.getInputStream(),"utf-8"));
String line;
while ((line = in.readLine()) != null) {
result += line;
}
in.close();
}
} catch (Exception e) {
System.out.println("发送GET请求出现异常!" + e);
e.printStackTrace();
result = "[{\"code\":500}]";
}
return result;
}
public static String doGet(String url, Map<String,String> param) {
try{
String paramString = "";
if(param!=null && !param.isEmpty()){
Set<String> keys = param.keySet();
java.util.Iterator<String> it = keys.iterator();
while(it.hasNext()){
String key = it.next();
String value = param.get(key);
paramString += key + "=" + (StringUtils.isEmpty(value)?"":java.net.URLEncoder.encode(value, "UTF-8")) + "&";
}
paramString = paramString.substring(0, paramString.length()-1);
}
return doGet(url,paramString);
}catch(Exception e){
e.printStackTrace();
}
return "[{\"code\":500}]";
}
/**
* 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 doPost(String url, String param) {
String result = "";
try {
URL realUrl = new URL(url);
// 打开和URL之间的连接
HttpURLConnection conn = (HttpURLConnection)realUrl.openConnection();
// conn.setConnectTimeout(3000);
// 发送POST请求必须设置如下两行
conn.setDoOutput(true);
conn.setDoInput(true);
conn.setUseCaches(false);//忽略缓存
conn.setRequestMethod("POST");
// 设置通用的请求属性
conn.setRequestProperty("Accept", "application/json, text/javascript, */*; q=0.01");
conn.setRequestProperty("Accept-Charset", "utf-8");
conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
conn.setRequestProperty("User-Agent", "Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/43.0.2357.81 Safari/537.36");
conn.setRequestProperty("Content-Length", String.valueOf(param==null?0:param.length()));
conn.setRequestProperty("X-Requested-With", "XMLHttpRequest");
//conn.setReadTimeout(3000);
//System.out.println(param.length());
conn.setRequestProperty("NAME", "X-Mailer");
conn.connect();
// 获取URLConnection对象对应的输出流
PrintWriter out = new PrintWriter(conn.getOutputStream());
// 发送请求参数
out.print(param);
// flush输出流的缓冲
out.flush();
out.close();
int resultCode = conn.getResponseCode();
System.out.println(resultCode);
if(resultCode>0){
// 定义BufferedReader输入流来读取URL的响应
BufferedReader in = new BufferedReader(new InputStreamReader(conn.getInputStream(),"utf-8"));
String line;
while ((line = in.readLine()) != null) {
result += line;
}
System.out.println(result);
in.close();
}
} catch (Exception e) {
System.out.println("发送 POST 请求出现异常!"+e);
e.printStackTrace();
result = "[{\"code\":500}]";
}
System.out.println(result);
return result;
}
public static String doPost(String url, Map<String,String> param) {
try{
String paramString = "";
if(param!=null && !param.isEmpty()){
Set<String> keys = param.keySet();
java.util.Iterator<String> it = keys.iterator();
while(it.hasNext()){
String key = it.next();
String value = param.get(key);
paramString += key + "=" + (StringUtils.isEmpty(value)?"":java.net.URLEncoder.encode(value, "UTF-8")) + "&";
}
paramString = paramString.substring(0, paramString.length()-1);
}
return doPost(url,paramString);
}catch(Exception e){
e.printStackTrace();
}
return "[{\"code\":500}]";
}
public static void main(String[] args) throws Exception{
String url = "http://pfoa.yffs131419.com/authorization";
Map<String, String> param=new HashMap();
param.put("userCode", "kh000001");
param.put("userToken", "a752dbfb27194d0b8eef215aa55e5e01");
HttpClients.doPost(url,param);
}
}