package com.example.url;
import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.io.PrintWriter; import java.net.MalformedURLException; import java.net.URL; import java.net.URLConnection; import java.util.List; import java.util.Map;
import android.util.Log;
/**
- @author cheyx attention:如果既要使用输入流读取URLConnection响应的内容,也要使用输出流 <br>
-
发送请求参数,一定要先使用输出流,再使用输入流
/ public class GetPostUtil { /* * 向指定URL发送GET方法的请求 * * @param url * 发送请求的URL * @param params请求参数 * ,请求参数应该是name1=value&name2=value2的形式 * @return URL所代表远程资源的相应 / public static String sendGet(String url, String params) { String result = ""; BufferedReader in = null; try { String urlName = url + "?" + params; URL realUrl = new URL(urlName); // 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)"); // 建立实际的连接 conn.connect(); // 获取所有响应的头字段 Map<String, List<String>> map = conn.getHeaderFields(); for (String key : map.keySet()) { System.out.println(key + "---------->" + map.get(key)); Log.i("kkk", key + "---------->" + map.get(key)); } // 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 += "\n" + line; } } catch (Exception e) { System.out.println("发送GET请求出现异常" + e); e.printStackTrace(); } finally { if (in != null) { try { in.close(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } } return result; }
/**
* 向指定的URL发送POST方法的请求
*
* @param url发送请求的URL
* @param params请求参数
* ,请求参数应该是name1=value1&name2=value2
* @return 所代表远程资源的响应
*/
public static String sendPost(String url, String params) {
PrintWriter out = null;
BufferedReader in = null;
String result = "";
try {
URL realUrl = new URL(url);
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(params);
// 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 += "\n" + line;
}
} catch (Exception e) {
System.out.println("发送POST请求出现错误" + e);
e.printStackTrace();
} finally {
try {
if (out != null)
out.close();
if (in != null)
in.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
return result;
}
}
Button get = (Button) findViewById(R.id.get); get.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
String url = "http://192.168.1.101:8080/WebTest/a.jsp";
String response = GetPostUtil.sendGet(url, null);
content.setText(response);
}
});
Button post = (Button) findViewById(R.id.post);
post.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
String url = "http://192.168.1.101:8080/WebTest/login.jsp";
String params = "name=crazyit.org&pass=leegang";
String response = GetPostUtil.sendPost(url, params);
content.setText(response);
}
});