java 以http client的post/get方式访问指定url
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2024-04-17 12:33:22
java 以http client的post/get方式访问指定url
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 com.xqlee.dev.project.core.utils.io.IOUtil;
/**
*
*
* <pre>
* _________________________INFO_____________________________
* | Description : [HTTP客服端]
* | Encoding : [UTF-8]
* | Package : [org.xqlee.utils.net]
* | Project : [utils]
* | Author : []
* | CreateDate : []
* | Updater : []
* | UpdateDate : []
* | UpdateRemark: []
* | Company : [Shallink Electronic Information]
* | Version : [v 1.0]
* | Libs : []
* __________________________________________________________
* </pre>
*/
public class HttpClient {
public static String doGet(String url, String param) throws IOException {
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(), "utf-8"));// 防止乱码
String line;
while ((line = in.readLine()) != null) {
result += line;
result+=IOUtil.LINE_SEPARATOR;
}
} catch (IOException e) {
throw e;
} finally {
try {
if (in != null) {
in.close();
}
} catch (Exception e2) {
throw e2;
}
}
return result;
}
public static String doPost(String url, String param) throws IOException {
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(), "utf-8"));
String line;
while ((line = in.readLine()) != null) {
result += line;
result+=IOUtil.LINE_SEPARATOR;
}
} catch (IOException e) {
throw e;
} finally {
try {
if (out != null) {
out.close();
}
if (in != null) {
in.close();
}
} catch (IOException ex) {
throw ex;
}
}
return result;
}
}
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