android上传图片至服务器=

android上传图片至服务器

本实例实现了android上传手机图片至服务器，服务器进行保存

服务器servlet代码

publicvoid doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

String temp=request.getSession().getServletContext().getRealPath("/") +"temp"; //临时目录

System.out.println("temp="+temp);

String loadpath=request.getSession().getServletContext().getRealPath(" /")+"Image"; //上传文件存放目录

System.out.println("loadpath="+loadpath);

DiskFileUpload fu =new DiskFileUpload();

fu.setSizeMax(1*1024*1024); // 设置允许用户上传文件大小,单位:字节

fu.setSizeThreshold(4096); // 设置最多只允许在内存中存储的数据,单位:字节

fu.setRepositoryPath(temp); // 设置一旦文件大小超过getSizeThresh old()的值时数据存放在硬盘的目录

//开始读取上传信息

int index=0;

List fileItems =null;

try{

fileItems = fu.parseRequest(reques t);

System.out.println("fileItems="+fi leItems);

} catch(Exception e) {

e.printStackTrace();

}

Iterator iter = fileItems.iterator(); // 依次处理每个上传的文件

while(iter.hasNext())

{

FileItem item = (FileItem)iter.next();// 忽略其他不是文件域的所有表单信息

if(!item.isFormField())

{

String name = item.getName();//获取上传文件名,包括路径

name=name.substring(https://www.360docs.net/doc/4f2904114.html,stIndexOf("\\")+1);//从全路径中提取文件名

long size = item.getSize();

if((name==null||name.equals("")) && size==0)

continue;

int point = name.indexOf(".");

name=(new Date()).getTime()+name.substring(point,name.le ngth())+index;

index++;

File fNew=new File(loadpath, name);

try{

item.write(fNew);

} catch(Exception e) {

// TODO Auto-generated catch bl ock

e.printStackTrace();

}

}

else//取出不是文件域的所有表单信息

{

String fieldvalue = item.getString();

//如果包含中文应写为：(转为UTF-8编码)

//String fieldvalue = new String(item.getString().getBytes(), "UTF-8");

}

}

String text1="11";

response.sendRedirect("result.jsp?text1="+ text1);

}

android客户端代码

publicclass PhotoUpload extends Activity {

private String newName ="image.jpg";

private String uploadFile ="/sdcard/image.JPG";

private String actionUrl ="http://192.168.0.71:8086/HelloWord/myForm";

private TextView mText1;

private TextView mText2;

private Button mButton;

@Override

publicvoid onCreate(Bundle savedInstanceState)

{

super.onCreate(savedInstanceState);

setContentView(https://www.360docs.net/doc/4f2904114.html,yout.photo_upload);

mText1 = (TextView) findViewById(R.id.myText2);

//"文件路径：\n"+

mText1.setText(uploadFile);

mText2 = (TextView) findViewById(R.id.myText3);

//"上传网址：\n"+

mText2.setText(actionUrl);

/* 设置mButton的onClick事件处理*/

mButton = (Button) findViewById(R.id.myButton);

mButton.setOnClickListener(new View.OnClickListener()

{

publicvoid onClick(View v)

{

uploadFile();

}

});

}

/* 上传文件至Server的方法*/

privatevoid uploadFile()

{

String end ="\r\n";

String twoHyphens ="--";

String boundary ="*****";

try

{

URL url =new URL(actionUrl);

HttpURLConnection con=(HttpURLConnection)url.openConnection();

/* 允许Input、Output，不使用Cache */

con.setDoInput(true);

con.setDoOutput(true);

con.setUseCaches(false);

/* 设置传送的method=POST */

con.setRequestMethod("POST");

/* setRequestProperty */

con.setRequestProperty("Connection", "Keep-Alive");

con.setRequestProperty("Charset", "UTF-8");

con.setRequestProperty("Content-Type",

"multipart/form-data;boundary="+boundary);

/* 设置DataOutputStream */

DataOutputStream ds =

new DataOutputStream(con.getOutputStream());

ds.writeBytes(twoHyphens + boundary + end);

ds.writeBytes("Content-Disposition: form-data; "+

"name=\"file1\";filename=\""+

newName +"\""+ end);

ds.writeBytes(end);

/* 取得文件的FileInputStream */

FileInputStream fStream =new FileInputStream(uploadFile);

/* 设置每次写入1024bytes */

int bufferSize =1024;

byte[] buffer =newbyte[bufferSize];

int length =-1;

/* 从文件读取数据至缓冲区*/

while((length = fStream.read(buffer)) !=-1)

{

/* 将资料写入DataOutputStream中*/

ds.write(buffer, 0, length);

}

ds.writeBytes(end);

ds.writeBytes(twoHyphens + boundary + twoHyphens + end);

/* close streams */

fStream.close();

ds.flush();

/* 取得Response内容*/

InputStream is = con.getInputStream();

int ch;

StringBuffer b =new StringBuffer();

while( ( ch = is.read() ) !=-1 )

{

b.append( (char)ch );

}

/* 将Response显示于Dialog */

showDialog("上传成功"+b.toString().trim());

/* 关闭DataOutputStream */

ds.close();

}

catch(Exception e)

{

showDialog("上传失败"+e);

}

}

/* 显示Dialog的method */

privatevoid showDialog(String mess)

{

new AlertDialog.Builder(PhotoUpload.this).setTitle("Message")

.setMessage(mess)

.setNegativeButton("确定",new DialogInterface.OnClickListener() {

publicvoid onClick(DialogInterface dialog, int which)

{

}

})

.show();

}

}