Android客户端
package com.example.testandroid;
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import java.io.DataOutputStream;
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import java.io.FileInputStream;
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import java.io.InputStream;
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import java.net.HttpURLConnection;
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import java.net.URL;
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import android.app.Activity;
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import android.app.AlertDialog;
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import android.content.DialogInterface;
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import android.os.Bundle;
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import android.view.View;
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import android.widget.Button;
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import android.widget.TextView;
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public class PhotoUpload extends Activity {
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private String newName = "image.jpg";
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private String uploadFile = "/sdcard/image.JPG";// 要上传的文件
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private String actionUrl = "http://192.168.0.1:8080/PhotoUpload/servlet/UploadServlet";
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private TextView mText1;
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private TextView mText2;
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private Button mButton;
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@Override
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public void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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setContentView(R.layout.activity_main);
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mText1 = (TextView) findViewById(R.id.myText2);
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// 文件路径：
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mText1.setText(uploadFile);
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mText2 = (TextView) findViewById(R.id.myText3);
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// 上传网址：
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mText2.setText(actionUrl);
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/* 设置mButton的onClick事件处理 */
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mButton = (Button) findViewById(R.id.myButton);
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mButton.setOnClickListener(new View.OnClickListener() {
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public void onClick(View v) {
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uploadFile();
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}
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});
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}
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/* 上传文件至Server的方法 */
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private void uploadFile() {
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String end = "\r\n";
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String twoHyphens = "--";
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String boundary = "*****";
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try {
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URL url = new URL(actionUrl);
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HttpURLConnection con = (HttpURLConnection) url.openConnection();
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/* 允许Input、Output，不使用Cache */
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con.setDoInput(true);
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con.setDoOutput(true);
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con.setUseCaches(false);
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// 设置http连接属性
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con.setRequestMethod("POST");
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con.setRequestProperty("Connection", "Keep-Alive");
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con.setRequestProperty("Charset", "UTF-8");
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con.setRequestProperty("Content-Type",
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"multipart/form-data;boundary=" + boundary);
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DataOutputStream ds = new DataOutputStream(con.getOutputStream());
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ds.writeBytes(twoHyphens + boundary + end);
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ds.writeBytes("Content-Disposition: form-data; "
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+ "name=\"file1\";filename=\"" + newName + "\"" + end);
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ds.writeBytes(end);
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// 取得文件的FileInputStream
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FileInputStream fStream = new FileInputStream(uploadFile);
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/* 设置每次写入1024bytes */
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int bufferSize = 1024;
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byte[] buffer = new byte[bufferSize];
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int length = -1;
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/* 从文件读取数据至缓冲区 */
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while ((length = fStream.read(buffer)) != -1) {
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/* 将资料写入DataOutputStream中 */
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ds.write(buffer, 0, length);
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}
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ds.writeBytes(end);
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ds.writeBytes(twoHyphens + boundary + twoHyphens + end);
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fStream.close();
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ds.flush();
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/* 取得Response内容 */
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InputStream is = con.getInputStream();
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int ch;
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StringBuffer b = new StringBuffer();
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while ((ch = is.read()) != -1) {
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b.append((char) ch);
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}
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/* 将Response显示于Dialog */
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showDialog("上传成功" + b.toString().trim());
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/* 关闭DataOutputStream */
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ds.close();
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} catch (Exception e) {
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showDialog("上传失败" + e);
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}
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}
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/* 显示Dialog的method */
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private void showDialog(String mess) {
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new AlertDialog.Builder(PhotoUpload.this).setTitle("Message")
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.setMessage(mess)
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.setNegativeButton("确定", new DialogInterface.OnClickListener() {
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public void onClick(DialogInterface dialog, int which) {
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}
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}).show();
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}
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} |
服务器端servlet
package com.demo;
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import java.io.File;
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import java.io.IOException;
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import java.util.Date;
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import java.util.Iterator;
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import java.util.List;
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import javax.servlet.ServletException;
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import javax.servlet.http.HttpServlet;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import org.apache.commons.fileupload.DiskFileUpload;
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import org.apache.commons.fileupload.FileItem;
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public class UploadServlet extends HttpServlet {
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public void doPost(HttpServletRequest request, HttpServletResponse response)
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throws ServletException, IOException {
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String temp = request.getSession().getServletContext().getRealPath("/")
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+ "temp"; // 临时目录
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System.out.println("temp=" + temp);
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String loadpath = request.getSession().getServletContext()
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.getRealPath("/")
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+ "Image"; // 上传文件存放目录
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System.out.println("loadpath=" + loadpath);
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DiskFileUpload fu = new DiskFileUpload(); // 需要导入commons-fileupload-1.2.2.jar
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fu.setSizeMax(1 * 1024 * 1024); // 设置允许用户上传文件大小,单位:字节
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fu.setSizeThreshold(4096); // 设置最多只允许在内存中存储的数据,单位:字节
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fu.setRepositoryPath(temp); // 设置一旦文件大小超过getSizeThreshold()的值时数据存放在硬盘的目录
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// 开始读取上传信息
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int index = 0;
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List fileItems = null;
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try {
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fileItems = fu.parseRequest(request);
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System.out.println("fileItems=" + fileItems);
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} catch (Exception e) {
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e.printStackTrace();
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}
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Iterator iter = fileItems.iterator(); // 依次处理每个上传的文件
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while (iter.hasNext()) {
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FileItem item = (FileItem) iter.next();// 忽略其他不是文件域的所有表单信息
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if (!item.isFormField()) {
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String name = item.getName();// 获取上传文件名,包括路径
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name = name.substring(name.lastIndexOf("\\") + 1);// 从全路径中提取文件名
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long size = item.getSize();
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if ((name == null || name.equals("")) && size == 0)
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continue;
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int point = name.indexOf(".");
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name = (new Date()).getTime()
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+ name.substring(point, name.length()) + index;
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index++;
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File fNew = new File(loadpath, name);
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try {
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item.write(fNew);
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} catch (Exception e) {
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// TODO Auto-generated catch block
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e.printStackTrace();
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}
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} else// 取出不是文件域的所有表单信息
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{
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String fieldvalue = item.getString();
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// 如果包含中文应写为：(转为UTF-8编码)
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// String fieldvalue = new
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// String(item.getString().getBytes(),"UTF-8");
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}
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}
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String text1 = "11";
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response.sendRedirect("result.jsp?text1=" + text1);
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}
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} |
activity_main.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
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xmlns:tools="http://schemas.android.com/tools"
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android:layout_width="match_parent"
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android:layout_height="match_parent" >
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<EditText
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android:id="@+id/myText2"
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android:layout_width="wrap_content"
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android:layout_height="wrap_content"
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android:layout_alignParentTop="true"
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android:layout_centerHorizontal="true"
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android:layout_marginTop="116dp"
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android:ems="10"
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android:inputType="textPersonName" />
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<EditText
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android:id="@+id/myText3"
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android:layout_width="wrap_content"
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android:layout_height="wrap_content"
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android:layout_alignLeft="@+id/myText2"
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android:layout_below="@+id/myText2"
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android:layout_marginTop="45dp"
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android:ems="10" />
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<Button
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android:id="@+id/myButton"
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android:layout_width="wrap_content"
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android:layout_height="wrap_content"
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android:layout_below="@+id/myText3"
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android:layout_centerHorizontal="true"
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android:layout_marginTop="61dp"
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android:text="上传" />
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</RelativeLayout>
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