页面布局：
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.example.uploadtest.MainActivity" >
<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:clickable="true"
android:onClick="choice"
android:text="选择并上传" />
<ImageView
android:id="@+id/imageView1"
android:layout_width="200dp"
android:layout_height="200dp"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="22dp"
android:src="@drawable/ic_launcher" />
</RelativeLayout>
Android上传代码实现：
package com.example.uploadtest;
import java.io.File;
import java.io.IOException;
import org.apache.http.client.ClientProtocolException;
import android.app.ProgressDialog;
import android.content.ContentResolver;
import android.content.Intent;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.net.Uri;
import android.os.AsyncTask;
import android.os.Bundle;
import android.provider.MediaStore;
import android.support.v7.app.ActionBarActivity;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.ImageView;
import android.widget.Toast;
public class MainActivity extends ActionBarActivity {
private ProgressDialog pd;
private static int rc = 101;
private ImageView imageView1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
imageView1 = (ImageView)findViewById(R.id.imageView1);
pd = new ProgressDialog(this);
}
public void choice(View view){
Intent intent = new Intent(Intent.ACTION_PICK,android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
intent.setDataAndType(MediaStore.Images.Media.EXTERNAL_CONTENT_URI,"image/*");
startActivityForResult(intent,rc);
}
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
Bitmap bm = null;
ContentResolver resolver = getContentResolver();
String path = null;
if (requestCode == rc) {
try {
Uri originalUri = data.getData(); //获得图片的uri
bm = MediaStore.Images.Media.getBitmap(resolver, originalUri);
//显得到bitmap图片
imageView1.setImageBitmap(bm);
String[] proj = {MediaStore.Images.Media.DATA};
Cursor cursor = getContentResolver().query(originalUri, proj, null, null, null);
if(cursor.moveToFirst()) {
int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
path = cursor.getString(column_index);
Log.e("TAG-->Error", path+"");
}
cursor.close();
if(null != path){
System.out.println("start path");
UploadTask ut = new UploadTask();
ut.execute(path);
}
} catch (IOException e) {
Log.e("TAG-->Error", e.toString());
}
}
}
private static String url = "http://192.168.46.99:8080/pms/UploadAction.do";
class UploadTask extends AsyncTask<String, Integer, String>{
@Override
protected String doInBackground(String... arg0) {
String f = arg0[0];
File file = new File(f);
try {
UploadUtil.upload(url, file);
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return "success";
}
@Override
protected void onPostExecute(String result) {
Toast.makeText(getApplicationContext(), "上传成功!", Toast.LENGTH_LONG).show();
pd.setProgress(100);
pd.dismiss();
}
@Override
protected void onPreExecute() {
pd.show();
pd.setProgress(0);
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
package com.example.uploadtest;
import java.io.File;
import java.io.IOException;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.HttpVersion;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.mime.MultipartEntity;
import org.apache.http.entity.mime.content.ContentBody;
import org.apache.http.entity.mime.content.FileBody;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.params.CoreProtocolPNames;
import org.apache.http.util.EntityUtils;
import android.util.Log;
public class UploadUtil {
public UploadUtil() {
// TODO Auto-generated constructor stub
}
public static void upload(String url,File file) throws ClientProtocolException, IOException{
HttpClient httpclient = new DefaultHttpClient();
//设置通信协议版本
httpclient.getParams().setParameter(CoreProtocolPNames.PROTOCOL_VERSION, HttpVersion.HTTP_1_1);
HttpPost httppost = new HttpPost(url);
MultipartEntity mpEntity = new MultipartEntity(); //文件传输
ContentBody cbFile = new FileBody(file);
mpEntity.addPart("userfile", cbFile); // <input type="file" name="userfile" /> 对应的
httppost.setEntity(mpEntity);
System.out.println("executing request " + httppost.getRequestLine());
HttpResponse response = httpclient.execute(httppost);
HttpEntity resEntity = response.getEntity();
System.out.println(response.getStatusLine());//通信Ok
String json="";
if (resEntity != null) {
json=EntityUtils.toString(resEntity,"utf-8");
Log.i("UploadUtil.class", "上传结果:"+json);
}
if (resEntity != null) {
resEntity.consumeContent();
}
httpclient.getConnectionManager().shutdown();
}
}
服务器端文件接收处理：
package com.bdqn.pms.servlet;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
public class UploadAction extends HttpServlet {
/**
*
*/
private static final long serialVersionUID = 6345411806513871336L;
@SuppressWarnings("unchecked")
@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
DiskFileItemFactory df = new DiskFileItemFactory();
ServletFileUpload sfu = new ServletFileUpload(df);
sfu.setHeaderEncoding("utf-8");
sfu.setFileSizeMax(100*1024*1024);
resp.setCharacterEncoding("utf-8");
try {
List<FileItem> list = sfu.parseRequest(req);
if(!ServletFileUpload.isMultipartContent(req)){
return;
}
Map<String, String> params = new HashMap<String, String>();
for(FileItem item:list){
if(item.isFormField()){
String name = item.getFieldName();
String value = item.getString("utf-8");
params.put(name, value);
}else{
String fileName = item.getName();
InputStream in = item.getInputStream();
write2FileByInputStream(in, fileName);
}
item.delete();
}
for(String s:params.keySet()){
System.out.println("s:"+s+";value:"+params.get(s));
}
resp.getWriter().write("上传成功!");
} catch (FileUploadException e) {
e.printStackTrace();
}
}
private void write2FileByInputStream(InputStream in,String fileName) throws IOException{
System.out.println("fileName is:"+fileName);
// fileName = StringUtils.replace(fileName, "\\", "/").replace("//", "/");
File f = new File("f:/test/"+fileName);
FileOutputStream out = new FileOutputStream(f);
byte[] b = new byte[1024];
int length = 0;
while((length = in.read(b))>0){
out.write(b, 0, length);
}
out.close();
in.close();
}
}
android端使用的jar包是httpmime-4.1.1.jar(见附件);
服务器端的jar包是：(commons-fileupload-1.2.2.jar/commons-io-2.4.jar;见附件)
然而，最终发布的运行结果死活无法按预期执行成功，各种调试、找bug；折腾半天还是么有效果。换手机测试也是不行，始终是运行到 HttpResponse response = httpclient.execute(httppost);该行代码直接退出，无异常信息，但是如果不加入文件则后台可以接收到数据。
无可奈何，第二天去公司后换了个sdk版本（android-20），再次执行居然成功了，换了个旧版本的手机(4.3)也是可以的。然后去网上一看，不少人也碰到这种问题。好家伙，就是一个版本兼容性的问题，httpclicent-4.1.1.jar在开发环境下不兼容androidsdk-19及以下版本。解决这个问题就是升级下sdk到20以上或者换个最新的adt吧，当然androidstudio也可以。兼容性问题真是java世界的类似dota"末日"爸爸。