一、問題引入

大家在登入網站的時候，大部分時候是通過一個表單提交登入資訊。

但是有時候瀏覽器會彈出一個登入驗證的對話方塊，如下圖，這就是使用HTTP基本認證

這種認證的相關介紹在另一篇部落格中有介紹，這裡不做解釋：

參見

http://blog.csdn.net/qq_15783243/article/details/78586699

二、方法示例：

在開發中如果我們遇到這種需要驗證的介面應該怎麼呼叫呢？

這裡給出一個Basic Authentication 介面呼叫的工具示例：

package com.credithc.rc.kg.utils;
import java.io.BufferedReader;
 
import java.io.IOException;
import java.io.PrintWriter;
import org.apache.commons.codec.binary.Base64;
import java.io.*;
import java.net.URL;
import java.net.URLConnection;
public class GetAPIResultUtil {


    /**
     * 
     *
     * @param url
* @param param
* @return
*/
public static String getAPIResult
 
(String url, String param) {
        PrintWriter out = null;
BufferedReader in = null;
String result = "";
        try {
            URL realUrl = new URL(url);
URLConnection conn = realUrl.openConnection();
//conn.setConnectTimeout(5000);
String plainCredentials = "lucy:12345";
String base64Credentials = new 
 
String(Base64.encodeBase64(plainCredentials.getBytes()));
conn.setRequestProperty("Authorization", "Basic " + base64Credentials);
conn.setRequestProperty("accept", "*/*");
conn.setRequestProperty("Content-type", "application/json");
conn.setRequestProperty("connection", "Keep-Alive");
conn.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
conn.setDoOutput(true);
conn.setDoInput(true);
out = new PrintWriter(conn.getOutputStream());
out.print(param);
out.flush();
in = new BufferedReader(new InputStreamReader(conn.getInputStream()));
String line;
            while ((line = in.readLine()) != null) {
                result += line;
}
        } catch (Exception e) {
            e.printStackTrace();
} finally {
            try {
                out.close();
in.close();
} catch (IOException ex) {
                ex.printStackTrace();
}
        }
        return result;
}
}

至此對基本認證（Basic Authentication）的完整過程就基本實現了，希望對大家有所幫助，本人水平有限，若有不足之處還請批評指正！