android base64传图片

转：http://my.oschina.net/bv10000/blog/374791

前端 andoid activity用到的函数

AsyncHttpClient 是一个框架提供的库 可以异步传输，使用时需下载android-async-http-1.4.4.jar包导入到项目中

[java] view
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public static void reg(final Context cont,Bitmap photodata,String regData) { try { ByteArrayOutputStream baos = new ByteArrayOutputStream(); //将bitmap一字节流输出 Bitmap.CompressFormat.PNG 压缩格式，100：压缩率，baos：字节流 photodata.compress(Bitmap.CompressFormat.PNG, 100, baos); baos.close(); byte[] buffer = baos.toByteArray(); System.out.println("图片的大小："+buffer.length); //将图片的字节流数据加密成base64字符输出 String photo = Base64.encodeToString(buffer, 0, buffer.length,Base64.DEFAULT); //photo=URLEncoder.encode(photo,"UTF-8"); RequestParams params = new RequestParams(); params.put("photo", photo); params.put("name", "woshishishi");//传输的字符数据 String url = "http://10.0.2.2:8080/IC_Server/servlet/RegisterServlet1"; AsyncHttpClient client = new AsyncHttpClient(); client.post(url, params, new AsyncHttpResponseHandler() { @Override public void onSuccess(int statusCode, String content){ Toast.makeText(cont, "头像上传成功!"+content, 0) .show(); } @Override public void onFailure(Throwable e, String data){ Toast.makeText(cont, "头像上传失败!", 0) .show(); } }); } catch (Exception e) { e.printStackTrace(); } }

服务器中 serverlet中的代码：

[java] view
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package uestc.app.ic.server.servlet;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import sun.misc.BASE64Decoder;

public class RegisterServlet1 extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
request.setCharacterEncoding("utf-8");
response.setCharacterEncoding("utf-8");
response.setContentType("text/html");
String photo = request.getParameter("photo");
String name = request.getParameter("name");

    <strong>try</strong> {  

        // 对base64数据进行解码 生成 字节数组，不能直接用Base64.decode（）；进行解密  
        <strong>byte</strong>[] photoimg = <strong>new</strong> BASE64Decoder().decodeBuffer(photo);  
        <strong>for</strong> (<strong>int</strong> i = 0; i &lt; photoimg.length; &#43;&#43;i) {  
            <strong>if</strong> (photoimg[i] &lt; 0) {  
                // 调整异常数据  
                photoimg[i] &#43;= 256;  
            }  
        }  

        // byte[] photoimg = Base64.decode(photo);//此处不能用Base64.decode（）方法解密，我调试时用此方法每次解密出的数据都比原数据大  所以用上面的函数进行解密，在网上直接拷贝的，花了好几个小时才找到这个错误（菜鸟不容易啊）  
        System.out.println(&quot;图片的大小：&quot; &#43; photoimg.length);  
        File file = <strong>new</strong> File(&quot;e:&quot;, &quot;decode.png&quot;);  
        File filename = <strong>new</strong> File(&quot;e:\name.txt&quot;);  
        <strong>if</strong> (!filename.exists()) {  
            file.createNewFile();  
        }  
        <strong>if</strong> (!file.exists()) {  
            file.createNewFile();  
        }  
        FileOutputStream out = <strong>new</strong> FileOutputStream(file);  
        FileOutputStream out1 = <strong>new</strong> FileOutputStream(filename);  
        out1.write(name.getBytes());  
        out.write(photoimg);  
        out.flush();  
        out.close();  
        out1.flush();  
        out1.close();  
    } <strong>catch</strong> (Exception e) {  
        // TODO Auto-generated catch block  
        e.printStackTrace();  
    }