add src/main/java/com/eg/www/common/utils/HttpUtil.
This commit is contained in:
parent
61ad4d79d9
commit
2ac9213b3a
135
src/main/java/com/eg/www/common/utils/HttpUtil
Normal file
135
src/main/java/com/eg/www/common/utils/HttpUtil
Normal file
@ -0,0 +1,135 @@
|
||||
package com.eg.www.common.utils;
|
||||
|
||||
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;
|
||||
|
||||
/**
|
||||
* @author: Eg
|
||||
* @Date: 2021/9/10 14:08
|
||||
*/
|
||||
public class HttpUtil {
|
||||
|
||||
/**
|
||||
* 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", "*/*");
|
||||
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) {
|
||||
sendGet("","");
|
||||
}
|
||||
}
|
||||
|
Loading…
Reference in New Issue
Block a user