android上传图片到服务器（使用base64字节流的形式通过 AsyncHttpClient框架

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 plain copy

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 plain copy

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");
try {
// 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
byte[] photoimg = new BASE64Decoder().decodeBuffer(photo);
for (int i = 0; i < photoimg.length; ++i) {
if (photoimg[i] < 0) {
// 调整异常数据
photoimg[i] += 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("图片的大小：" + photoimg.length);
File file = new File("e:", "decode.png");
File filename = new File("e:\\name.txt");
if (!filename.exists()) {
file.createNewFile();
}
if (!file.exists()) {
file.createNewFile();
}
FileOutputStream out = new FileOutputStream(file);
FileOutputStream out1 = new FileOutputStream(filename);
out1.write(name.getBytes());
out.write(photoimg);
out.flush();
out.close();
out1.flush();
out1.close();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

来源：oschina

链接：https://my.oschina.net/u/187988/blog/374791

标签

android

图片上传

asynchttpclient