android 的 httpclient 和自己的web服务器之间有较多的数据传输，传输不完全

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android 的 httpclient 和自己的web服务器之间有较多的数据传输，传输不完全5

因为我同时传输的是几张图片，图片我先转换成base64编码的字符串了和一些文字的混合流，然后我发现这边接收的字符串信息不完全。请问该如何搞定这个问题，万分感谢。
我在logcat特意观察过接收到的数据只有很少一部分。

问题补充：贴上源代码和错误信息
安卓客户端部分网络传输源代码
package edu.whu.util;

import java.io.IOException;
import java.io.InputStream;
import java.util.List;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.HttpStatus;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;

import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.util.Log;

public class HttpUtil implements Runnable {
public static String httpUrl = "http://192.168.1.139:8080/Web/";
public static String result = "";
public static Bitmap bitmap = null;
public String url = null;
List<NameValuePair> list;

public HttpUtil(String url, List<NameValuePair> list) {
this.list = list;
this.url = url;
}

@Override
public void run() {
try {
// http post连接对象url
HttpPost httppost = new HttpPost(url);
// 设置字符集
HttpEntity httpentity = new UrlEncodedFormEntity(list, "utf-8");
// 设置查询参数
httppost.setEntity(httpentity);
// 创建一个http连接实例
HttpClient httpclient = new DefaultHttpClient();
// 取得默认的查询结果实例
HttpResponse response = httpclient.execute(httppost);
if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
// 取得返回的字符串
result = EntityUtils.toString(response.getEntity());
String tag = null;
Log.v(tag, result);
// bitmap=BitmapFactory.decodeFile(result);

/* // 取得图片字节流
HttpEntity httpEntity = response.getEntity();
InputStream is = httpEntity.getContent();
bitmap = BitmapFactory.decodeStream(is);
is.close();*/
} else {
result = "请求错误!";
}
} catch (ClientProtocolException e) {
e.printStackTrace();

} catch (IOException e) {
e.printStackTrace();

} catch (Exception e) {
e.printStackTrace();

}
}

}

服务器输出源代码：
package servlet;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.List;

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

import util.ImageOutput;
import dao.Bookdao;
import dao.daoimpl.BookdaoImpl;
import entity.Book;
public class ShowServlet extends HttpServlet {

private static final long serialVersionUID = 1L;
//@Override
//public void service(HttpServletRequest req, HttpServletResponse resp)
// throws ServletException, IOException {
// Bookdao bookdao = new BookdaoImpl();
// List<Book> list = bookdao.findAllBook();
// // 将内容拼接成相应格式的字符串，其中没一组之间用分号分割，每一项之间用逗号分割。图片读取其信息并采用
// // Base64编码传输
// String out = null;
//
// for (Book book : list) {
// String pic = null;
// pic = book.getPic();
// System.out.print(pic);
// ImageOutput imageoutput = new ImageOutput("/home/shenlei/tupian/"+pic, resp);
// String pictostring = imageoutput.GetImageStr();
// out = out + book.getPrice() + "," + book.getName() + "," + pictostring
// + ";";
// }
// PrintWriter outs = resp.getWriter();
// outs.print("<html>");
// outs.print("<body>");
// outs.print("helloworld");
// outs.print("</body>");
// outs.print("</html>");
//}

@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
req.setCharacterEncoding("UTF-8");
resp.setCharacterEncoding("UTF-8");
Bookdao bookdao = new BookdaoImpl();
List<Book> list = bookdao.findAllBook();
// 将内容拼接成相应格式的字符串，其中没一组之间用分号分割，每一项之间用逗号分割。图片读取其信息并采用
// Base64编码传输
String out = "";

for (Book book : list) {
String pic = "";
pic = book.getPic();
// System.out.print(pic);
ImageOutput imageoutput = new ImageOutput("/home/shenlei/tupian/"+pic, resp);
String pictostring = imageoutput.GetImageStr();
out = out + book.getPrice() + "," + book.getName() + "," + pictostring
+ ";";
}
PrintWriter outs = resp.getWriter();
outs.print(out);
outs.flush();

}
}

问题补充：现在提示的是文件无法解析，不可能啊，我测试过这个方法可用的
07-29 11:53:25.618: E/BitmapFactory(30557): Unable to decode stream: FileNotFoundException
07-29 11:53:25.618: I/System.out(30557): resolveUri failed on bad bitmap uri: android.graphics.drawable.BitmapDrawable@41ff2538