实例介绍
【实例简介】
【实例截图】
【核心代码】
android端代码：
package com.example.take_photo_upload;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.HashMap;
import java.util.Map;
import android.annotation.SuppressLint;
import android.annotation.TargetApi;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.AlertDialog.Builder;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.DialogInterface.OnClickListener;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Matrix;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.os.Environment;
import android.os.StrictMode;
import android.provider.MediaStore;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
public class MainActivity extends Activity {
private static final int PHOTO_CAPTURE = 0x11;
private static String photoPath = "/sdcard/AnBo/";
private static String photoName = photoPath "laolisb.jpg";
Uri imageUri = Uri.fromFile(new File(Environment.getExternalStorageDirectory(), "image.jpg"));//第二个参数是临时文件，在后面将会被修改
private Button photo, sc_photo;//拍照与下载
private ImageView img_photo;//显示图片
private String newName = "laoli.jpg";
/*
* 这里的代码应该有问题
*/
private String uploadFile = "/sdcard/AnBo/laolisb.jpg";
private String actionUrl = "http://192.168.0.104:8080/UploadPhoto1/UploadServlet";// private String actionUrl = "http://192.168.0.104:8080/File/UploadAction";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
photo = (Button) findViewById(R.id.photo);
sc_photo = (Button) findViewById(R.id.sc_photo);
img_photo = (ImageView) findViewById(R.id.imt_photo);
/*
* android.os.NetworkOnMainThreadException
* 耗时操作，加如下代码，可在主线程中进行，但不推荐
*/
// StrictMode.setThreadPolicy(new StrictMode.ThreadPolicy.Builder().detectDiskReads().detectDiskWrites().detectNetwork().penaltyLog().build());
// StrictMode.setVmPolicy(new StrictMode.VmPolicy.Builder().detectLeakedSqlLiteObjects().penaltyLog().penaltyDeath().build());
sc_photo.setOnClickListener(new Sc_photo());
photo.setOnClickListener(new Photo());
}
class Sc_photo implements View.OnClickListener {
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
dialog();
}
}
class Photo implements View.OnClickListener {
@Override
public void onClick(View v) {
Intent intent = new Intent("android.media.action.IMAGE_CAPTURE");
//"/sdcard/AnBo/";
File file = new File(photoPath);
if (!file.exists()) { // 检查图片存放的文件夹是否存在
file.mkdir(); // 不存在的话 创建文件夹
}
//photoPath "laolisb.jpg"
File photo = new File(photoName);
imageUri = Uri.fromFile(photo);
intent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri); // 这样就将文件的存储方式和uri指定到了Camera应用中
startActivityForResult(intent, PHOTO_CAPTURE);
}
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
// TODO Auto-generated method stub
super.onActivityResult(requestCode, resultCode, data);
String sdStatus = Environment.getExternalStorageState();
switch (requestCode) {
case PHOTO_CAPTURE:
if (!sdStatus.equals(Environment.MEDIA_MOUNTED)) {
Log.i("内存卡错误", "请检查您的内存卡");
} else {
BitmapFactory.Options op = new BitmapFactory.Options();
// 设置图片的大小
Bitmap bitMap = BitmapFactory.decodeFile(photoName);
int width = bitMap.getWidth();
int height = bitMap.getHeight();
// 设置想要的大小
int newWidth = 480;
int newHeight = 640;
// 计算缩放比例
float scaleWidth = ((float) newWidth) / width;
float scaleHeight = ((float) newHeight) / height;
// 取得想要缩放的matrix参数
Matrix matrix = new Matrix();
matrix.postScale(scaleWidth, scaleHeight);
// 得到新的图片
bitMap = Bitmap.createBitmap(bitMap, 0, 0, width, height, matrix, true);
// canvas.drawBitmap(bitMap, 0, 0, paint)
// 防止内存溢出
op.inSampleSize = 4; // 这个数字越大,图片大小越小.
Bitmap pic = null;
pic = BitmapFactory.decodeFile(photoName, op);
img_photo.setImageBitmap(pic); // 这个ImageView是拍照完成后显示图片
FileOutputStream b = null;
;
try {
b = new FileOutputStream(photoName);
} catch (FileNotFoundException e) {
e.printStackTrace();
}
if (pic != null) {
pic.compress(Bitmap.CompressFormat.JPEG, 50, b);
}
}
break;
default:
return;
}
}
protected void dialog() {
AlertDialog.Builder builder = new Builder(MainActivity.this);
builder.setMessage("确认上传图片吗？");
builder.setTitle("提示");
builder.setPositiveButton("确认", new OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
new Thread(new Runnable() {
@Override
public void run() {
uploadPhoto();
//uploadFile();
}
}).start();
}
});
builder.setNegativeButton("取消", new OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
});
builder.create().show();
}
//第二种上传方式
public void uploadPhoto() {
Map<String, String> params = new HashMap<String, String>();
params.put("strParamName", "strParamValue");
Map<String, File> files = new HashMap<String, File>();
files.put(System.currentTimeMillis() ".jpg", new File(uploadFile));//uploadFile = "/sdcard/AnBo/laolisb.jpg";
try {
String str = HttpPost.post(actionUrl, params, files);
System.out.println("str--->>>" str);
} catch (Exception e) {
}
}
/* 上传文件至Server的方法 */
private void uploadFile() {
System.out.print("正在发送请求！");
String end = "\r\n";
String twoHyphens = "--";
String boundary = "*****";
Log.d("Index_Activity", "jsdj");
try {
URL url = new URL(actionUrl);
HttpURLConnection con = (HttpURLConnection) url.openConnection();
/* 允许Input、Output，不使用Cache */
System.out.println(con.getResponseCode() "*********");
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 */
System.out.print("已经找到数据正在发送！");
int bufferSize = 1024 * 10;
byte[] buffer = new byte[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");
/* 关闭DataOutputStream */
ds.close();
} catch (Exception e) {
Log.d("OK", "jsdj");
System.out.print("网络出现异常！");
// showDialog("上传失败");
e.printStackTrace();
}
}
/* 显示Dialog的method */
private void showDialog(String mess) {
new AlertDialog.Builder(MainActivity.this).setTitle("提示").setMessage(mess).setNegativeButton("确定", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
}
}).show();
}
}
服务器端代码：
package com.upload.servlet;
import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Iterator;
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.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileUpload;
import org.apache.commons.fileupload.RequestContext;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.apache.commons.fileupload.servlet.ServletRequestContext;
/**
* Servlet implementation class UploadServlet
*/
@WebServlet("/UploadServlet")
public class UploadServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
/**
* Default constructor.
*/
public UploadServlet() {
// TODO Auto-generated constructor stub
}
/**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
RequestContext req = new ServletRequestContext(request);
if (FileUpload.isMultipartContent(req)) {
DiskFileItemFactory factory = new DiskFileItemFactory();
ServletFileUpload fileUpload = new ServletFileUpload(factory);
fileUpload.setFileSizeMax(1024 * 1024 * 1024);
List items = new ArrayList();
try {
items = fileUpload.parseRequest(request);
} catch (Exception e) {
}
Iterator it = items.iterator();
while (it.hasNext()) {
FileItem fileItem = (FileItem) it.next();
if (fileItem.isFormField()) {
System.out.println(fileItem.getFieldName() " " fileItem.getName() " " new String(fileItem.getString().getBytes("ISO-8859-1"), "GBK"));
} else {
System.out.println(fileItem.getFieldName() " " fileItem.getName() " " fileItem.isInMemory() " " fileItem.getContentType() " " fileItem.getSize());
if (fileItem.getName() != null && fileItem.getSize() != 0) {
File fullFile = new File(fileItem.getName());
File newFile = new File("F:\\upload\\" fullFile.getName());
try {
fileItem.write(newFile);
} catch (Exception E) {
}
} else {
System.out.println("no file choosen or empty file");
}
}
}
}
}
}
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