Android+jsp +html 文件上传案例 已测试 成功通过
我文件上传一直是广大读者一个问题 今天就把成功案例写下
javaweb
网页前段
<%@ page language="java" import="java.util.*" pageEncoding="Utf-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP 'index.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<body>
<form id="form1" name="form1" method="post" action="servlet/upload" enctype="multipart/form-data">
<table border="0" align="center">
<tr>
<td>上传人：</td>
<td>
<input name="name" type="text" id="name" size="20" ></td>
</tr>
<tr>
<td>上传文件：</td>
<td><input name="file" type="file" size="20" ></td>
</tr>
<tr>
<td></td><td>
<input type="submit" name="submit" value="提交" >
<input type="reset" name="reset" value="重置" >
</td>
</tr>
</table>
</form>
</body>
</html>
服务器后端
代码建议一个Servlet之前需要下载commons-fileupload-1.2.2.jar，commons-io-2.0.1.jar 架包
建议servlet 名字是upload
期待代码如下
package com.example.wenjian;
import java.io.File;
import android.net.Uri;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.provider.MediaStore;
import android.provider.MediaStore.Images;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.content.ContentResolver;
import android.content.DialogInterface;
import android.content.Intent;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.Toast;
public class MainActivity extends Activity {
private Button button,button2;
private EditText editText;
private String picpath;
private ImageView imageView;
private String text;
private String url="http://10.17.151.66:8080/upload/servlet/upload";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
button=(Button)this.findViewById(R.id.button1);
button2=(Button)this.findViewById(R.id.button2);
imageView=(ImageView)this.findViewById(R.id.imageview);
button.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
// Intent intent = new Intent();
// intent.setType("image/*");
// intent.setAction(Intent.ACTION_GET_CONTENT);
// startActivityForResult(intent, 1);
Intent intent = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(intent, 1);
}
});
button2.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
final File file=new File(picpath);
if(file!=null){
new Thread(){
public void run() {
text= UploadUtil.uploadFile(file, url);
// uploadimage uploadimage=new uploadimage();
// String text=uploadimage.uploadFile(url, "image.jpg", file);
Message message=Message.obtain();
message.what=1;
message.obj=text;
System.out.println("------text"+text);
handler.sendMessage(message);
// Toast.makeText(MainActivity.this, text, 1).show();
};
}.start();
}
}
});
}
private Handler handler=new Handler(){
public void handleMessage(Message msg) {
if (msg!=null) {
if(msg.what==1){
text=(String) msg.obj;
Toast.makeText(MainActivity.this, text, 1).show();
}
}
};
};
@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
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
// TODO Auto-generated method stub
if(requestCode == 1 && resultCode == RESULT_OK && data != null){
// if(requestCode==Activity.RESULT_OK){
Uri uri=data.getData();
System.out.println("---uri"+uri);
try {
String[] pojo={MediaStore.Images.Media.DATA};
Cursor cursor=managedQuery(uri, pojo,
null, null, null);
if(cursor!=null){
System.out.println("-------hahaha");
ContentResolver cr=this.getContentResolver();
int colunm_index=cursor.getColumnIndexOrThrow(
MediaStore.Images.Media.DATA);
cursor.moveToFirst();
String path=cursor.getString(colunm_index);
System.out.println("----"+path);
if(path.endsWith("jpg")||path.endsWith("png")){
picpath=path;
Bitmap bitmap=BitmapFactory.decodeStream(
cr.openInputStream(uri));
imageView.setImageBitmap(bitmap);
}else {
alert();
}
}else {
alert();
}
} catch (Exception e) {
// TODO: handle exception
}
}
super.onActivityResult(requestCode, resultCode, data);
}
private void alert()
{
Dialog dialog = new AlertDialog.Builder(this)
.setTitle("提示")
.setMessage("您选择的不是有效的图片")
.setPositiveButton("确定",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int which) {
picpath = null;
}
})
.create();
dialog.show();
}
}
Android端代码
网页客户端前台
布局 如下
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<ImageView android:layout_width="fill_parent"
android:layout_height="200sp"
android:id="@+id/imageview"
android:src="@drawable/ic_launcher"/>
<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="选择图片" />
<Button
android:id="@+id/button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="上传图片" />
</LinearLayout>
Android 端逻辑代码如下
package com.example.wenjian;
import java.io.File;
import android.net.Uri;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.provider.MediaStore;
import android.provider.MediaStore.Images;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.content.ContentResolver;
import android.content.DialogInterface;
import android.content.Intent;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.Toast;
public class MainActivity extends Activity {
private Button button,button2;
private EditText editText;
private String picpath;
private ImageView imageView;
private String text;
private String url="http://10.17.151.66:8080/upload/servlet/upload";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
button=(Button)this.findViewById(R.id.button1);
button2=(Button)this.findViewById(R.id.button2);
imageView=(ImageView)this.findViewById(R.id.imageview);
button.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
// Intent intent = new Intent();
// intent.setType("image/*");
// intent.setAction(Intent.ACTION_GET_CONTENT);
// startActivityForResult(intent, 1);
Intent intent = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(intent, 1);
}
});
button2.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
final File file=new File(picpath);
if(file!=null){
new Thread(){
public void run() {
text= UploadUtil.uploadFile(file, url);
// uploadimage uploadimage=new uploadimage();
// String text=uploadimage.uploadFile(url, "image.jpg", file);
Message message=Message.obtain();
message.what=1;
message.obj=text;
System.out.println("------text"+text);
handler.sendMessage(message);
// Toast.makeText(MainActivity.this, text, 1).show();
};
}.start();
}
}
});
}
private Handler handler=new Handler(){
public void handleMessage(Message msg) {
if (msg!=null) {
if(msg.what==1){
text=(String) msg.obj;
Toast.makeText(MainActivity.this, text, 1).show();
}
}
};
};
@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
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
// TODO Auto-generated method stub
if(requestCode == 1 && resultCode == RESULT_OK && data != null){
// if(requestCode==Activity.RESULT_OK){
Uri uri=data.getData();
System.out.println("---uri"+uri);
try {
String[] pojo={MediaStore.Images.Media.DATA};
Cursor cursor=managedQuery(uri, pojo,
null, null, null);
if(cursor!=null){
System.out.println("-------hahaha");
ContentResolver cr=this.getContentResolver();
int colunm_index=cursor.getColumnIndexOrThrow(
MediaStore.Images.Media.DATA);
cursor.moveToFirst();
String path=cursor.getString(colunm_index);
System.out.println("----"+path);
if(path.endsWith("jpg")||path.endsWith("png")){
picpath=path;
Bitmap bitmap=BitmapFactory.decodeStream(
cr.openInputStream(uri));
imageView.setImageBitmap(bitmap);
}else {
alert();
}
}else {
alert();
}
} catch (Exception e) {
// TODO: handle exception
}
}
super.onActivityResult(requestCode, resultCode, data);
}
private void alert()
{
Dialog dialog = new AlertDialog.Builder(this)
.setTitle("提示")
.setMessage("您选择的不是有效的图片")
.setPositiveButton("确定",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int which) {
picpath = null;
}
})
.create();
dialog.show();
}
}
其余只需要 添加权限即可
希望能帮助你们