Android端上传图片到后台，存储到数据库中 详细代码
2017-06-16 18:00
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Android端上传图片到后台，存储到数据库中 详细代码
首先点击头像弹出popwindow,点击相册，相机，调用手机自带的裁剪功能，然后异步任务类访问服务器，上传头像，保存到数据库中，下面写出popwindow的代码
//设置popwindow
public PopupWindow getPopWindow(View view){
PopupWindow popupWindow=new PopupWindow(view,
LinearLayout.LayoutParams.MATCH_PARENT,
LinearLayout.LayoutParams.WRAP_CONTENT,true);
// popupWindow.setFocusable(true);
//点击pop外面是否消失
popupWindow.setOutsideTouchable(true);
anim底下的动画效果
popupWindow.setAnimationStyle(R.style.popStyle);
//设置背景透明度
backgroundAlpha(0.3f);
//————————
//设置View隐藏
loginHead.setVisibility(View.GONE);
popupWindow.setBackgroundDrawable(new ColorDrawable());
popupWindow.showAtLocation(loginHead, Gravity.BOTTOM, 0, 0);
popupWindow.setOnDismissListener(new PopupWindow.OnDismissListener() {
@Override
public void onDismiss() {
//设置背景透明度
backgroundAlpha(1f);
//设置View可见
loginHead.setVisibility(View.VISIBLE);
}
});
return popupWindow;
}
//设置透明度
public void backgroundAlpha (float bgAlpha){
WindowManager.LayoutParams lp=
getWindow().getAttributes();
lp.alpha=bgAlpha;
getWindow().setAttributes(lp);
}
下面为调用相机 相册时所用的方法UrlUtil.IMG_URL为访问servlet的路径
//调用相机
private String capturPath="";
public void tekePhoto(){
Intent camera=new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
File parent = FileUitlity.getInstance(getApplicationContext())
.makeDir("head_img");
capturPath=parent.getPath()
+File.separatorChar
+System.currentTimeMillis()
+".jpg";
camera.putExtra(MediaStore.EXTRA_OUTPUT,
Uri.fromFile(new File(capturPath)));
camera.putExtra(MediaStore.EXTRA_VIDEO_QUALITY, 1);
startActivityForResult(camera, 1);
}
/*
* 调用图库
* */
public void phonePhoto(){
Intent intent=new Intent(Intent.ACTION_PICK, MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(intent,2);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if(resultCode != Activity.RESULT_OK){
return ;
}
//相机返回结果，调用系统裁剪
if(requestCode==1){
startPicZoom(Uri.fromFile(new File(capturPath)));
}
//相册返回结果，调用系统裁剪
else if (requestCode==2){
Cursor cursor=
getContentResolver()
.query(data.getData()
, new String[]{MediaStore.Images.Media.DATA}
, null, null, null);
cursor.moveToFirst();
capturPath=cursor.getString(
cursor.getColumnIndex(
MediaStore.Images.Media.DATA));
cursor.close();
startPicZoom(Uri.fromFile(new File(capturPath)));
}else if(requestCode==3){
Bundle bundle= data.getExtras();
if(bundle!=null){
final Bitmap bitmap = bundle.getParcelable("data");
loginHead.setImageBitmap(bitmap);
pw.dismiss();
AlertDialog.Builder alter =
new AlertDialog.Builder(this)
.setPositiveButton("上传", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
上传时用的方法
File file = new File(capturPath);
new Upload(file).execute(UrlUtil.IMG_URL+"&userName="+myAplication.getUsername());
Toast.makeText(getBaseContext(),UrlUtil.IMG_URL+"&userName="+myAplication.getUsername(),Toast.LENGTH_SHORT).show();
//String result = UploadImg.uploadFile(file, UrlUtil.IMG_URL);
// Toast.makeText(getBaseContext(),result,Toast.LENGTH_SHORT).show();
/*uploadImg(bitmap);*/
}
}).setNegativeButton("取消", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
}
});
AlertDialog dialog = alter.create();
dialog.show();
}
}
}下面为异步任务类
UploadImg.uploadFile(file,strings[0]);为上传的任务类，在异步任务类中调用
public class Upload extends AsyncTask<String,Void,String> {
File file;
public Upload(File file){
this.file = file;
}
@Override
protected String doInBackground(String... strings) {
return UploadImg.uploadFile(file,strings[0]);
}
@Override
protected void onPostExecute(String s) {
super.onPostExecute(s);
if(s != null){
Toast.makeText(getBaseContext(),"上传成功",Toast.LENGTH_SHORT).show();
}else{
Toast.makeText(getBaseContext(),"上传失败",Toast.LENGTH_SHORT).show();
}
}
}上传所用的任务类
public class UploadImg {
private static final String TAG = "uploadFile";
private static final int TIME_OUT = 10*1000; //超时时间
private static final String CHARSET = "utf-8"; //设置编码
/**
* android上传文件到服务器
* @param file 需要上传的文件
* @param RequestURL 请求的rul
* @return 返回响应的内容
*/
public static String uploadFile(File file, String RequestURL){
String result = null;
String BOUNDARY = UUID.randomUUID().toString(); //边界标识 随机生成
String PREFIX = "--" , LINE_END = "\r\n";
String CONTENT_TYPE = "multipart/form-data"; //内容类型
try {
URL url = new URL(RequestURL);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setReadTimeout(TIME_OUT);
conn.setConnectTimeout(TIME_OUT);
conn.setDoInput(true); //允许输入流
conn.setDoOutput(true); //允许输出流
conn.setUseCaches(false); //不允许使用缓存
conn.setRequestMethod("POST"); //请求方式
conn.setRequestProperty("Charset", CHARSET); //设置编码
conn.setRequestProperty("connection", "keep-alive");
conn.setRequestProperty("Content-Type", CONTENT_TYPE + ";boundary=" + BOUNDARY);
conn.setRequestProperty("action", "upload");
conn.connect();
if(file!=null){
/**
* 当文件不为空，把文件包装并且上传
*/
DataOutputStream dos = new DataOutputStream( conn.getOutputStream());
StringBuffer sb = new StringBuffer();
sb.append(PREFIX);
sb.append(BOUNDARY);
sb.append(LINE_END);
/**
* 这里重点注意：
* name里面的值为服务器端需要key 只有这个key 才可以得到对应的文件
* filename是文件的名字，包含后缀名的 比如:abc.png
*/
sb.append("Content-Disposition: form-data; name=\"img\"; filename=\""+file.getName()+"\""+LINE_END);
sb.append("Content-Type: application/octet-stream; charset="+CHARSET+LINE_END);
sb.append(LINE_END);
dos.write(sb.toString().getBytes());
InputStream is = new FileInputStream(file);
byte[] bytes = new byte[1024];
int len = 0;
while((len=is.read(bytes))!=-1){
dos.write(bytes, 0, len);
}
is.close();
dos.write(LINE_END.getBytes());
byte[] end_data = (PREFIX+BOUNDARY+PREFIX+LINE_END).getBytes();
dos.write(end_data);
dos.flush();
/**
* 获取响应码 200=成功
* 当响应成功，获取响应的流
*/
int res = conn.getResponseCode();
if(res==200){
InputStream input = conn.getInputStream();
StringBuffer sb1= new StringBuffer();
int ss ;
while((ss=input.read())!=-1){
sb1.append((char)ss);
}
result = sb1.toString();
System.out.println(result);
}
}
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return result;
}
}上面就是android的代码，下面写出后台servlet的代码，
1 //从android端 上传图片
2 public void uploadImg(HttpServletRequest request, HttpServletResponse response)
3 throws IOException {
4 String userName = request.getParameter("userName");
5 System.out.println("从Android获得的UserNAme为："+userName);
6 PrintWriter out = response.getWriter();
7 // 创建文件项目工厂对象
8 DiskFileItemFactory factory = new DiskFileItemFactory();
9 // 设置文件上传路径
需要在webRoot下新建一个名为upload的文件夹，在里面再建个名为photo的文件夹
10 String upload = this.getServletContext().getRealPath("upload/photo");
11
12 // 获取系统默认的临时文件保存路径，该路径为Tomcat根目录下的temp文件夹
13 String temp = System.getProperty("java.io.tmpdir");
14 // 设置缓冲区大小为 5M
15 factory.setSizeThreshold(1024 * 1024 * 5);
16 // 设置临时文件夹为temp
17 factory.setRepository(new File(temp));
18 // 用工厂实例化上传组件,ServletFileUpload 用来解析文件上传请求
19 ServletFileUpload servletFileUpload = new ServletFileUpload(factory);
20 String path = null;
21 // 解析结果放在List中
22 try {
23 List<FileItem> list = servletFileUpload.parseRequest(request);
24
25 for (FileItem item : list) {
26 String name = item.getFieldName();
27 InputStream is = item.getInputStream();
28
29 if (name.contains("content")) {
30 System.out.println(inputStream2String(is));
31 } else if (name.contains("img")) {
32 try {
33 path = upload+"\\"+item.getName();
34 inputStream2File(is, path);
35 TestMethod tm = new TestMethod();
int c = tm.insertImages(userName, ReadPhoto(path));
42 System.out.println(c);
43 break;
44 } catch (Exception e) {
45 e.printStackTrace();
46 }
47 }
48 }
49 out.write(path); //这里我把服务端成功后，返回给客户端的是上传成功后路径
50 } catch (FileUploadException e) {
51 e.printStackTrace();
52 System.out.println("failure");
53 out.write("failure");
54 }
55
56 out.flush();
57 out.close();
58
59
60
61
62 }
63 // 流转化成字符串
64 public static String inputStream2String(InputStream is) throws IOException {
65 ByteArrayOutputStream baos = new ByteArrayOutputStream();
66 int i = -1;
67 while ((i = is.read()) != -1) {
68 baos.write(i);
69 }
70 return baos.toString();
71 }
72
73 // 流转化成文件
74 public static void inputStream2File(InputStream is, String savePath) throws Exception {
75 System.out.println("文件保存路径为:" + savePath);
76 File file = new File(savePath);
77 InputStream inputSteam = is;
78 BufferedInputStream fis = new BufferedInputStream(inputSteam);
79 FileOutputStream fos = new FileOutputStream(file);
80 int f;
81 while ((f = fis.read()) != -1) {
82 fos.write(f);
83 }
84 fos.flush();
85 fos.close();
86 fis.close();
87 inputSteam.close();
88
89 }
90 public static byte[] ReadPhoto(String path) {
91 File file = new File(path);
92 FileInputStream fin;
93 // 建一个缓冲保存数据
94 ByteBuffer nbf = ByteBuffer.allocate((int) file.length());
95 byte[] array = new byte[1024];
96 int offset = 0, length = 0;
97 byte[] content = null;
98 try {
99 fin = new FileInputStream(file);
100 while((length = fin.read(array)) > 0){
101 if(length != 1024) nbf.put(array,0,length);
102 else nbf.put(array);
103 offset += length;
104 }
105 fin.close();
106 content = nbf.array();
107 } catch (FileNotFoundException e) {
108 // TODO Auto-generated catch block
109 e.printStackTrace();
110 } catch (IOException e) {
111 // TODO Auto-generated catch block
112 e.printStackTrace();
113 }
114 return content;
115 }1
查询数据库update
public class TestMethod {
2 public int insertImages(String desc,byte[] content) {
3 Connection con = DBcon.getConnection();
4 PreparedStatement pstmt = null;
5 String sql = "update user set image = ? " +
6 "where userName = ? ";
7 int affCount = 0;
8 try {
9 pstmt = con.prepareStatement(sql);
10 pstmt.setBytes(1, content);
11 pstmt.setString(2, desc);
12 affCount = pstmt.executeUpdate();
13 } catch (SQLException e1) {
14 // TODO Auto-generated catch block
15 e1.printStackTrace();
16 }
17 return affCount;
18 }
19 }
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