问题描述
- 安卓与Servlet交互,空指针
-
客户端关键源码如下:
AsyncHttpClient add=new AsyncHttpClient();
add.addHeader("charset", HTTP.UTF_8);
add.addHeader("Content-Type", "text/plain");
price=pri.getText().toString();
RequestParams params=new RequestParams();
RequestParams picparms=new RequestParams();//截取图片名称 String upic=realPath.substring(realPath.lastIndexOf("/")+1, realPath.length()); File pic=new File(realPath); System.out.println(upic); params.add("type", "mobile"); params.add("model", model); params.add("brand", brand); params.add("price", "1200"); params.add("picPath", upic); //图片上传 try { picparms.put("pic", new PhotoUpload().Upload(realPath)); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } System.out.println(">>>>>>>>>>图片大小为:"+pic.length()); System.out.println("基本信息:"+params.toString()); add.get(URL, params, new AsyncHttpResponseHandler() { @Override public void onSuccess(int arg0, Header[] arg1, byte[] arg2) { // TODO Auto-generated method stub System.out.println("服务器连接成功"); if(arg0==200) { boolean b = Boolean.valueOf(new String(arg2)); if(b) { Toast.makeText(UpdateCom.this, "图片上传成功", Toast.LENGTH_SHORT).show(); }else { Toast.makeText(UpdateCom.this, "图片上传失败", Toast.LENGTH_SHORT).show(); } } } @Override public void onFailure(int arg0, Header[] arg1, byte[] arg2, Throwable arg3) { // TODO Auto-generated method stub System.out.println("服务器连接失败"); } }); add.post(URL, picparms, new AsyncHttpResponseHandler() { @Override public void onSuccess(int arg0, Header[] arg1, byte[] arg2) { // TODO Auto-generated method stub System.out.println("服务器连接成功"); if(arg0==200) { boolean b = Boolean.valueOf(new String(arg2)); if(b) { Toast.makeText(UpdateCom.this, "基本信息上传成功", Toast.LENGTH_SHORT).show(); }else { Toast.makeText(UpdateCom.this, "基本信息上传失败", Toast.LENGTH_SHORT).show(); } } } @Override public void onFailure(int arg0, Header[] arg1, byte[] arg2, Throwable arg3) { // TODO Auto-generated method stub System.out.println("服务器连接失败"); } //显示上传进度 public void onProgress(int bytesWritten, int totalSize) { // TODO Auto-generated method stub super.onProgress(bytesWritten, totalSize); int count = (int) ((bytesWritten * 1.0 / totalSize) * 100); // 上传进度显示 progress.setProgress(count); Log.e("上传 Progress>>>>>", bytesWritten + " / " + totalSize); } }); break; default: break; } } 为什么有post和get呢,就是楼主要问的,应为post传上去,更本就拿不出来,而get不能传图片等大文件;所以就有了两个parms,对了,我在这里用到了AsyncHttpClient; 服务器关键代码为: package package_for_ordinary_person;import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.List;import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;import org.apache.tomcat.util.http.fileupload.FileItem;
import org.apache.tomcat.util.http.fileupload.RequestContext;
import org.apache.tomcat.util.http.fileupload.disk.DiskFileItemFactory;
import org.apache.tomcat.util.http.fileupload.servlet.ServletFileUpload;import com.beans.CompetGoods;
import com.dao_for_interface.CompGoodsDao;/**
- Servlet implementation class AddComproduct
*/
@WebServlet("/AddComproduct")
public class AddComproduct extends HttpServlet {boolean flag;
private static final long serialVersionUID = 1L;
CompGoodsDao cgd = new CompGoodsDao();
CompetGoods cgoods;
java.sql.Date currentDate = new java.sql.Date(System.currentTimeMillis());
public String brand,model,picPath;
/**- @see HttpServlet#HttpServlet()
*/
public AddComproduct() {
super();
// TODO Auto-generated constructor stub
}
/**
- @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse
-
response)*/
@SuppressWarnings("resource")
protected void doGet(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stubString type = request.getParameter("type");
brand = request.getParameter("brand");
model = request.getParameter("model");
String price = request.getParameter("price");
picPath = request.getParameter("picPath");
System.out.println(type + brand + model + price+picPath);
cgoods = new CompetGoods();
cgoods.setType(type);
cgoods.setBrand(brand);
cgoods.setModel(model);
cgoods.setCprice(price);
cgoods.setUploadDate(currentDate);
if (cgd.upload(cgoods)) {
flag = true;
} else {
flag = false;
}response.setContentType("text/plain,charset=UTF-8");
PrintWriter out = response.getWriter();
out.print(flag);
}
/**
- @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse
-
response)*/
protected void doPost(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
cgoods=new CompetGoods();
System.out.println(">>>>>" + request.getContentLength());
InputStream is = request.getInputStream();
// String picdate=request.getParameter("pic");
// System.out.println(">>>>>" + picdate.length());
File file=new File("//usr//local//ImageFromClient//"+picPath);
if (!file.exists()) {
try {
System.out.println("文件不存在,正在创建.路径为" + file);
file.createNewFile();
} catch (IOException e) {
e.printStackTrace();
}
}
FileOutputStream fos1 = new FileOutputStream(file);
// fos1.write(new sun.misc.BASE64Decoder().decodeBuffer(is));
int i = 0;
while ((i = is.read()) != -1) {
fos1.write(i);
}
fos1.close();
is.close();// 图片保存并入库
/*FileOutputStream fos = null;
File file = new File("//usr//local//ImageFromClient//" + picPath);
if (!file.exists()) {
try {
System.out.println("文件不存在,正在创建.路径为" + file);
file.createNewFile();
} catch (IOException e) {
e.printStackTrace();
}
}
fos = new FileOutputStream(file);*/
/*- try { //写入的是字节流 //通过解码之后直接生成图片 //picPath存储的是图片文件字节 fos.write(new
- sun.misc.BASE64Decoder().decodeBuffer(picPath));
- System.out.println("成功写入" + file); } catch (IOException e) { // TODO
- Auto-generated catch block e.printStackTrace(); }
*/
cgoods.setBrand(brand);
cgoods.setModel(model);
cgoods.setCpicPath(file.toString());
if (cgd.updatecom(cgoods)) {
flag = true;
} else {
flag = false;
}
response.setContentType("text/plain,charset=UTF-8");
PrintWriter out = response.getWriter();
out.print(flag);
}
- @see HttpServlet#HttpServlet()
}
另外补充,post方法的request是可以打印出来大小的,就是取不出来. - Servlet implementation class AddComproduct
解决方案
异常栈怎么没贴出来？