本实例封装了一个处理安卓客户端与服务器端交互的几个方法,对于中文乱码问题本实例也找到了解决方案.本例可以处理的场景如下:
1.与服务器端交互json数据.
2.Get方式与服务器端交互数据.
3.Post方式与服务器端交互数据.
4.HttpClient方式与服务器端交互数据.
5.上传文件到服务器端.
6.从服务器端下载文件.
7.从服务器端读取文本文件.
实例截图:
本篇文章将实例代码完整贴出,希望以本文作为一个交流的平台,大家集思广益封装出更好的处理类.交流地址: http://blog.csdn.net/lk_blog/article/details/7706348#comments
客户端的封装类NetTool.Java:
[java] view plain copy
- package com.tgb.lk.demo.util;
- import java.io.BufferedReader;
- import java.io.DataOutputStream;
- import java.io.File;
- import java.io.FileInputStream;
- import java.io.FileOutputStream;
- import java.io.IOException;
- import java.io.InputStream;
- import java.io.InputStreamReader;
- import java.io.OutputStream;
- import java.net.HttpURLConnection;
- import java.net.MalformedURLException;
- import java.net.URL;
- import java.net.URLEncoder;
- import java.util.ArrayList;
- import java.util.List;
- import java.util.Map;
- import org.apache.http.HttpEntity;
- import org.apache.http.HttpResponse;
- import org.apache.http.NameValuePair;
- import org.apache.http.client.entity.UrlEncodedFormEntity;
- import org.apache.http.client.methods.HttpPost;
- import org.apache.http.impl.client.DefaultHttpClient;
- import org.apache.http.message.BasicNameValuePair;
- import android.os.Environment;
- /**
- * NetTool:封装一个类搞定90%安卓客户端与服务器端交互
- *
- * @author 李坤 五期信息技术提高班
- */
- public class NetTool {
- private static final int TIMEOUT = 10000;// 10秒
- /**
- * 传送文本,例如Json,xml等
- */
- public static String sendTxt(String urlPath, String txt, String encoding)
- throws Exception {
- byte[] sendData = txt.getBytes();
- URL url = new URL(urlPath);
- HttpURLConnection conn = (HttpURLConnection) url.openConnection();
- conn.setRequestMethod("POST");
- conn.setConnectTimeout(TIMEOUT);
- // 如果通过post提交数据,必须设置允许对外输出数据
- conn.setDoOutput(true);
- conn.setRequestProperty("Content-Type", "text/xml");
- conn.setRequestProperty("Charset", encoding);
- conn.setRequestProperty("Content-Length", String
- .valueOf(sendData.length));
- OutputStream outStream = conn.getOutputStream();
- outStream.write(sendData);
- outStream.flush();
- outStream.close();
- if (conn.getResponseCode() == 200) {
- // 获得服务器响应的数据
- BufferedReader in = new BufferedReader(new InputStreamReader(conn
- .getInputStream(), encoding));
- // 数据
- String retData = null;
- String responseData = "";
- while ((retData = in.readLine()) != null) {
- responseData += retData;
- }
- in.close();
- return responseData;
- }
- return "sendText error!";
- }
- /**
- * 上传文件
- */
- public static String sendFile(String urlPath, String filePath,
- String newName) throws Exception {
- String end = "\r\n";
- String twoHyphens = "--";
- String boundary = "*****";
- URL url = new URL(urlPath);
- HttpURLConnection con = (HttpURLConnection) url.openConnection();
- /* 允许Input、Output,不使用Cache */
- 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(filePath);
- /* 设置每次写入1024bytes */
- int bufferSize = 1024;
- 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);
- }
- /* 关闭DataOutputStream */
- ds.close();
- return b.toString();
- }
- /**
- * 通过get方式提交参数给服务器
- */
- public static String sendGetRequest(String urlPath,
- Map<String, String> params, String encoding) throws Exception {
- // 使用StringBuilder对象
- StringBuilder sb = new StringBuilder(urlPath);
- sb.append(‘?‘);
- // 迭代Map
- for (Map.Entry<String, String> entry : params.entrySet()) {
- sb.append(entry.getKey()).append(‘=‘).append(
- URLEncoder.encode(entry.getValue(), encoding)).append(‘&‘);
- }
- sb.deleteCharAt(sb.length() - 1);
- // 打开链接
- URL url = new URL(sb.toString());
- HttpURLConnection conn = (HttpURLConnection) url.openConnection();
- conn.setRequestMethod("GET");
- conn.setRequestProperty("Content-Type", "text/xml");
- conn.setRequestProperty("Charset", encoding);
- conn.setConnectTimeout(TIMEOUT);
- // 如果请求响应码是200,则表示成功
- if (conn.getResponseCode() == 200) {
- // 获得服务器响应的数据
- BufferedReader in = new BufferedReader(new InputStreamReader(conn
- .getInputStream(), encoding));
- // 数据
- String retData = null;
- String responseData = "";
- while ((retData = in.readLine()) != null) {
- responseData += retData;
- }
- in.close();
- return responseData;
- }
- return "sendGetRequest error!";
- }
- /**
- * 通过Post方式提交参数给服务器,也可以用来传送json或xml文件
- */
- public static String sendPostRequest(String urlPath,
- Map<String, String> params, String encoding) throws Exception {
- StringBuilder sb = new StringBuilder();
- // 如果参数不为空
- if (params != null && !params.isEmpty()) {
- for (Map.Entry<String, String> entry : params.entrySet()) {
- // Post方式提交参数的话,不能省略内容类型与长度
- sb.append(entry.getKey()).append(‘=‘).append(
- URLEncoder.encode(entry.getValue(), encoding)).append(
- ‘&‘);
- }
- sb.deleteCharAt(sb.length() - 1);
- }
- // 得到实体的二进制数据
- byte[] entitydata = sb.toString().getBytes();
- URL url = new URL(urlPath);
- HttpURLConnection conn = (HttpURLConnection) url.openConnection();
- conn.setRequestMethod("POST");
- conn.setConnectTimeout(TIMEOUT);
- // 如果通过post提交数据,必须设置允许对外输出数据
- conn.setDoOutput(true);
- // 这里只设置内容类型与内容长度的头字段
- conn.setRequestProperty("Content-Type",
- "application/x-www-form-urlencoded");
- // conn.setRequestProperty("Content-Type", "text/xml");
- conn.setRequestProperty("Charset", encoding);
- conn.setRequestProperty("Content-Length", String
- .valueOf(entitydata.length));
- OutputStream outStream = conn.getOutputStream();
- // 把实体数据写入是输出流
- outStream.write(entitydata);
- // 内存中的数据刷入
- outStream.flush();
- outStream.close();
- // 如果请求响应码是200,则表示成功
- if (conn.getResponseCode() == 200) {
- // 获得服务器响应的数据
- BufferedReader in = new BufferedReader(new InputStreamReader(conn
- .getInputStream(), encoding));
- // 数据
- String retData = null;
- String responseData = "";
- while ((retData = in.readLine()) != null) {
- responseData += retData;
- }
- in.close();
- return responseData;
- }
- return "sendText error!";
- }
- /**
- * 在遇上HTTPS安全模式或者操作cookie的时候使用HTTPclient会方便很多 使用HTTPClient(开源项目)向服务器提交参数
- */
- public static String sendHttpClientPost(String urlPath,
- Map<String, String> params, String encoding) throws Exception {
- // 需要把参数放到NameValuePair
- List<NameValuePair> paramPairs = new ArrayList<NameValuePair>();
- if (params != null && !params.isEmpty()) {
- for (Map.Entry<String, String> entry : params.entrySet()) {
- paramPairs.add(new BasicNameValuePair(entry.getKey(), entry
- .getValue()));
- }
- }
- // 对请求参数进行编码,得到实体数据
- UrlEncodedFormEntity entitydata = new UrlEncodedFormEntity(paramPairs,
- encoding);
- // 构造一个请求路径
- HttpPost post = new HttpPost(urlPath);
- // 设置请求实体
- post.setEntity(entitydata);
- // 浏览器对象
- DefaultHttpClient client = new DefaultHttpClient();
- // 执行post请求
- HttpResponse response = client.execute(post);
- // 从状态行中获取状态码,判断响应码是否符合要求
- if (response.getStatusLine().getStatusCode() == 200) {
- HttpEntity entity = response.getEntity();
- InputStream inputStream = entity.getContent();
- InputStreamReader inputStreamReader = new InputStreamReader(
- inputStream, encoding);
- BufferedReader reader = new BufferedReader(inputStreamReader);// 读字符串用的。
- String s;
- String responseData = "";
- while (((s = reader.readLine()) != null)) {
- responseData += s;
- }
- reader.close();// 关闭输入流
- return responseData;
- }
- return "sendHttpClientPost error!";
- }
- /**
- * 根据URL直接读文件内容,前提是这个文件当中的内容是文本,函数的返回值就是文件当中的内容
- */
- public static String readTxtFile(String urlStr, String encoding)
- throws Exception {
- StringBuffer sb = new StringBuffer();
- String line = null;
- BufferedReader buffer = null;
- try {
- // 创建一个URL对象
- URL url = new URL(urlStr);
- // 创建一个Http连接
- HttpURLConnection urlConn = (HttpURLConnection) url
- .openConnection();
- // 使用IO流读取数据
- buffer = new BufferedReader(new InputStreamReader(urlConn
- .getInputStream(), encoding));
- while ((line = buffer.readLine()) != null) {
- sb.append(line);
- }
- } catch (Exception e) {
- throw e;
- } finally {
- try {
- buffer.close();
- } catch (Exception e) {
- e.printStackTrace();
- }
- }
- return sb.toString();
- }
- /**
- * 该函数返回整形 -1:代表下载文件出错 0:代表下载文件成功 1:代表文件已经存在
- */
- public static int downloadFile(String urlStr, String path, String fileName)
- throws Exception {
- InputStream inputStream = null;
- try {
- inputStream = getInputStreamFromUrl(urlStr);
- File resultFile = write2SDFromInput(path, fileName, inputStream);
- if (resultFile == null) {
- return -1;
- }
- } catch (Exception e) {
- return -1;
- } finally {
- try {
- inputStream.close();
- } catch (Exception e) {
- throw e;
- }
- }
- return 0;
- }
- /**
- * 根据URL得到输入流
- *
- * @param urlStr
- * @return
- * @throws MalformedURLException
- * @throws IOException
- */
- public static InputStream getInputStreamFromUrl(String urlStr)
- throws MalformedURLException, IOException {
- URL url = new URL(urlStr);
- HttpURLConnection urlConn = (HttpURLConnection) url.openConnection();
- InputStream inputStream = urlConn.getInputStream();
- return inputStream;
- }
- /**
- * 将一个InputStream里面的数据写入到SD卡中
- */
- private static File write2SDFromInput(String directory, String fileName,
- InputStream input) {
- File file = null;
- String SDPATH = Environment.getExternalStorageDirectory().toString();
- FileOutputStream output = null;
- File dir = new File(SDPATH + directory);
- if (!dir.exists()) {
- dir.mkdir();
- }
- try {
- file = new File(dir + File.separator + fileName);
- file.createNewFile();
- output = new FileOutputStream(file);
- byte buffer[] = new byte[1024];
- while ((input.read(buffer)) != -1) {
- output.write(buffer);
- }
- output.flush();
- } catch (IOException e) {
- e.printStackTrace();
- } finally {
- try {
- output.close();
- } catch (IOException e) {
- e.printStackTrace();
- }
- }
- return file;
- }
- }
客户端main.xml:
[html] view plain copy
- <?xml version="1.0" encoding="utf-8"?>
- <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
- android:layout_width="fill_parent"
- android:layout_height="fill_parent"
- android:orientation="vertical" >
- <TextView
- android:id="@+id/tvData"
- android:layout_width="fill_parent"
- android:layout_height="wrap_content"
- android:text="数据" />
- <Button
- android:id="@+id/btnTxt"
- android:layout_width="fill_parent"
- android:layout_height="wrap_content"
- android:text="与服务器端交互Json数据" />
- <Button
- android:id="@+id/btnGet"
- android:layout_width="fill_parent"
- android:layout_height="wrap_content"
- android:text="Get方式与服务器端交互数据" />
- <Button
- android:id="@+id/btnPost"
- android:layout_width="fill_parent"
- android:layout_height="wrap_content"
- android:text="Post方式与服务器端交互数据" />
- <Button
- android:id="@+id/btnHttpClient"
- android:layout_width="fill_parent"
- android:layout_height="wrap_content"
- android:text="HttpClient方式与服务器端交互数据" />
- <Button
- android:id="@+id/btnUploadFile"
- android:layout_width="fill_parent"
- android:layout_height="wrap_content"
- android:text="上传文件到服务器端" />
- <Button
- android:id="@+id/btnDownloadFile"
- android:layout_width="fill_parent"
- android:layout_height="wrap_content"
- android:text="从服务器端下载文件" />
- <Button
- android:id="@+id/btnReadTxtFile"
- android:layout_width="fill_parent"
- android:layout_height="wrap_content"
- android:text="从服务器端读取文本文件" />
- </LinearLayout>
客户端AppClientActivity.java:
[java] view plain copy
- package com.tgb.lk.demo.appclient;
- import java.util.HashMap;
- import java.util.Map;
- import com.google.gson.Gson;
- import com.tgb.lk.demo.model.Student;
- import com.tgb.lk.demo.util.NetTool;
- import android.app.Activity;
- import android.os.Bundle;
- import android.view.View;
- import android.view.View.OnClickListener;
- import android.widget.Button;
- import android.widget.TextView;
- public class AppClientActivity extends Activity {
- private TextView tvData = null;
- private Button btnTxt = null;
- private Button btnGet = null;
- private Button btnPost = null;
- private Button btnHttpClient = null;
- private Button btnUploadFile = null;
- private Button btnReadTxtFile = null;
- private Button btnDownloadFile = null;
- //需要将下面的IP改为服务器端IP
- private String txtUrl = "http://192.168.1.46:8080/AppServer/SynTxtDataServlet";
- private String url = "http://192.168.1.46:8080/AppServer/SynDataServlet";
- private String uploadUrl = "http://192.168.1.46:8080/AppServer/UploadFileServlet";
- private String fileUrl = "http://192.168.1.46:8080/AppServer/file.jpg";
- private String txtFileUrl = "http://192.168.1.46:8080/AppServer/txtFile.txt";
- @Override
- public void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- setContentView(R.layout.main);
- tvData = (TextView) findViewById(R.id.tvData);
- btnTxt = (Button) findViewById(R.id.btnTxt);
- btnGet = (Button) findViewById(R.id.btnGet);
- btnPost = (Button) findViewById(R.id.btnPost);
- btnHttpClient = (Button) findViewById(R.id.btnHttpClient);
- btnUploadFile = (Button) findViewById(R.id.btnUploadFile);
- btnReadTxtFile = (Button) findViewById(R.id.btnReadTxtFile);
- btnDownloadFile = (Button) findViewById(R.id.btnDownloadFile);
- btnTxt.setOnClickListener(btnListener);
- btnGet.setOnClickListener(btnListener);
- btnPost.setOnClickListener(btnListener);
- btnHttpClient.setOnClickListener(btnListener);
- btnUploadFile.setOnClickListener(btnListener);
- btnReadTxtFile.setOnClickListener(btnListener);
- btnDownloadFile.setOnClickListener(btnListener);
- }
- OnClickListener btnListener = new OnClickListener() {
- String retStr = "";
- @Override
- public void onClick(View v) {
- switch (v.getId()) {
- case R.id.btnTxt:
- Student student = new Student();
- student.setId(1);
- student.setName("李坤");
- student.setClasses("五期信息技术提高班");
- Gson gson = new Gson();
- String jsonTxt = gson.toJson(student);
- try {
- retStr = NetTool.sendTxt(txtUrl, jsonTxt,"UTF-8");
- } catch (Exception e2) {
- e2.printStackTrace();
- }
- break;
- case R.id.btnGet:
- Map<String, String> map = new HashMap<String, String>();
- map.put("name", "李坤");
- map.put("age", "26");
- map.put("classes", "五期信息技术提高班");
- try {
- retStr = NetTool.sendGetRequest(url, map, "utf-8");
- } catch (Exception e) {
- e.printStackTrace();
- }
- break;
- case R.id.btnPost:
- Map<String, String> map2 = new HashMap<String, String>();
- map2.put("name", "李坤");
- map2.put("age", "26");
- map2.put("classes", "五期信息技术提高班");
- try {
- retStr = NetTool.sendPostRequest(url, map2, "utf-8");
- } catch (Exception e) {
- e.printStackTrace();
- }
- break;
- case R.id.btnHttpClient:
- Map<String, String> map3 = new HashMap<String, String>();
- map3.put("name", "李坤");
- map3.put("age", "26");
- map3.put("classes", "五期信息技术提高班");
- try {
- retStr = NetTool.sendHttpClientPost(url, map3, "utf-8");
- } catch (Exception e) {
- e.printStackTrace();
- }
- break;
- case R.id.btnUploadFile:
- // 需要在sdcard中放一张image.jsp的图片,本例才能正确运行
- try {
- retStr = NetTool.sendFile(uploadUrl, "/sdcard/image.jpg",
- "image1.jpg");
- } catch (Exception e) {
- e.printStackTrace();
- }
- break;
- case R.id.btnReadTxtFile:
- try {
- //本例中服务器端的文件类型是UTF-8
- retStr = NetTool.readTxtFile(txtFileUrl, "UTF-8");
- } catch (Exception e1) {
- e1.printStackTrace();
- }
- break;
- case R.id.btnDownloadFile:
- try {
- NetTool.downloadFile(fileUrl, "/download", "newfile.jpg");
- } catch (Exception e) {
- e.printStackTrace();
- }
- break;
- default:
- break;
- }
- tvData.setText(retStr);
- }
- };
- }
客户端Student.java
[java] view plain copy
- package com.tgb.lk.demo.model;
- public class Student {
- private int id;
- private String name;
- private String classes;
- public int getId() {
- return id;
- }
- public void setId(int id) {
- this.id = id;
- }
- //get set方法略
- @Override
- public String toString() {
- return "Student [classes=" + classes + ", id=" + id + ", name=" + name
- + "]";
- }
- }
客户端AndroidManifest.xml:
[html] view plain copy
- <?xml version="1.0" encoding="utf-8"?>
- <manifest xmlns:android="http://schemas.android.com/apk/res/android"
- package="com.tgb.lk.demo.appclient"
- android:versionCode="1"
- android:versionName="1.0" >
- <uses-sdk android:minSdkVersion="7" />
- <application
- android:icon="@drawable/ic_launcher"
- android:label="@string/app_name" >
- <activity
- android:label="@string/app_name"
- android:name=".AppClientActivity" >
- <intent-filter >
- <action android:name="android.intent.action.MAIN" />
- <category android:name="android.intent.category.LAUNCHER" />
- </intent-filter>
- </activity>
- </application>
- <uses-permission android:name="android.permission.INTERNET" />
- <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
- </manifest>
服务器端web.xml
[html] view plain copy
- <?xml version="1.0" encoding="UTF-8"?>
- <web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"
- xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
- xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
- http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
- <servlet>
- <servlet-name>SynDataServlet</servlet-name>
- <servlet-class>com.tgb.lk.demo.appserver.SynDataServlet</servlet-class>
- </servlet>
- <servlet>
- <servlet-name>UploadFileServlet</servlet-name>
- <servlet-class>com.tgb.lk.demo.appserver.UploadFileServlet</servlet-class>
- </servlet>
- <servlet>
- <servlet-name>SynTxtDataServlet</servlet-name>
- <servlet-class>com.tgb.lk.demo.appserver.SynTxtDataServlet</servlet-class>
- </servlet>
- <servlet-mapping>
- <servlet-name>SynDataServlet</servlet-name>
- <url-pattern>/SynDataServlet</url-pattern>
- </servlet-mapping>
- <servlet-mapping>
- <servlet-name>UploadFileServlet</servlet-name>
- <url-pattern>/UploadFileServlet</url-pattern>
- </servlet-mapping>
- <servlet-mapping>
- <servlet-name>SynTxtDataServlet</servlet-name>
- <url-pattern>/SynTxtDataServlet</url-pattern>
- </servlet-mapping>
- <welcome-file-list>
- <welcome-file>index.jsp</welcome-file>
- </welcome-file-list>
- </web-app>
服务器端SynDataServlet.java
[java] view plain copy
- package com.tgb.lk.demo.appserver;
- import java.io.IOException;
- import java.io.PrintWriter;
- import javax.servlet.ServletException;
- import javax.servlet.http.HttpServlet;
- import javax.servlet.http.HttpServletRequest;
- import javax.servlet.http.HttpServletResponse;
- public class SynDataServlet extends HttpServlet {
- public void doGet(HttpServletRequest request, HttpServletResponse response)
- throws ServletException, IOException {
- System.out.println("---------get-------------");
- // 处理中文乱码问题解决办法
- String name = new String(request.getParameter("name").getBytes(
- "iso-8859-1"), "UTF-8");
- String age = request.getParameter("age");
- String classes = new String(request.getParameter("classes").getBytes(
- "iso-8859-1"), "UTF-8");
- System.out.println("-------" + name + age + classes + "--------");
- response.setContentType("text/xml; charset=UTF-8");
- PrintWriter out = response.getWriter();
- out.print("GET method ");
- out.print("name=" + name + ",age=" + age + ",classes=" + classes);
- out.flush();
- out.close();
- }
- public void doPost(HttpServletRequest request, HttpServletResponse response)
- throws ServletException, IOException {
- System.out.println("---------post-------------");
- String name = new String(request.getParameter("name").getBytes(
- "iso-8859-1"), "UTF-8");
- String age = request.getParameter("age");
- String classes = new String(request.getParameter("classes").getBytes(
- "iso-8859-1"), "UTF-8");
- System.out.println("--------" + name + age + classes + "---------");
- response.setContentType("text/xml; charset=UTF-8");
- PrintWriter out = response.getWriter();
- out.print("POST method");
- out.print("name=" + name + ",age=" + age + ",classes=" + classes);
- out.flush();
- out.close();
- }
- }
服务器端SynTxtDataServlet.java
[java] view plain copy
- package com.tgb.lk.demo.appserver;
- import java.io.BufferedReader;
- import java.io.IOException;
- import java.io.InputStreamReader;
- import java.io.PrintWriter;
- import javax.servlet.ServletException;
- import javax.servlet.http.HttpServlet;
- import javax.servlet.http.HttpServletRequest;
- import javax.servlet.http.HttpServletResponse;
- public class SynTxtDataServlet extends HttpServlet {
- public void doPost(HttpServletRequest request, HttpServletResponse response)
- throws ServletException, IOException {
- BufferedReader in = new BufferedReader(new InputStreamReader(request
- .getInputStream(), "UTF-8"));
- // 数据
- String retData = null;
- String responseData = "";
- while ((retData = in.readLine()) != null) {
- responseData += retData;
- }
- in.close();
- response.setContentType("text/xml; charset=UTF-8");
- PrintWriter out = response.getWriter();
- out.print("POST method");
- out.print(responseData);
- out.flush();
- out.close();
- }
- }
服务器端UploadFileServlet.java(服务器端需引入commons-fileupload-1.2.2.jar和commons-io-2.3.jar)
[java] view plain copy
- package com.tgb.lk.demo.appserver;
- 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.http.HttpServlet;
- import javax.servlet.http.HttpServletRequest;
- import javax.servlet.http.HttpServletResponse;
- import org.apache.commons.fileupload.FileUpload;
- import org.apache.commons.fileupload.FileUploadException;
- import org.apache.commons.fileupload.disk.DiskFileItem;
- import org.apache.commons.fileupload.disk.DiskFileItemFactory;
- import org.apache.commons.fileupload.servlet.ServletFileUpload;
- import org.apache.commons.fileupload.servlet.ServletRequestContext;
- public class UploadFileServlet extends HttpServlet {
- public void doPost(HttpServletRequest request, HttpServletResponse response)
- throws ServletException, IOException {
- // 设置request编码,主要是为了处理普通输入框中的中文问题
- request.setCharacterEncoding("gbk");
- // 这里对request进行封装,RequestContext提供了对request多个访问方法
- org.apache.commons.fileupload.RequestContext requestContext = new ServletRequestContext(
- request);
- // 判断表单是否是Multipart类型的。这里可以直接对request进行判断,不过已经以前的用法了
- if (FileUpload.isMultipartContent(requestContext)) {
- DiskFileItemFactory factory = new DiskFileItemFactory();
- // 设置文件的缓存路径
- factory.setRepository(new File("d:/tmp/"));
- File dir = new File("d:\\download\\");
- if (!dir.exists()) {
- dir.mkdirs();
- }
- // System.out.print("已经生成临时文件");
- ServletFileUpload upload = new ServletFileUpload(factory);
- // 设置上传文件大小的上限,-1表示无上限
- upload.setSizeMax(100000 * 1024 * 1024);
- List items = new ArrayList();
- try {
- // 上传文件,并解析出所有的表单字段,包括普通字段和文件字段
- items = upload.parseRequest(request);
- } catch (FileUploadException e1) {
- System.out.println("文件上传发生错误" + e1.getMessage());
- }
- // 下面对每个字段进行处理,分普通字段和文件字段
- Iterator it = items.iterator();
- while (it.hasNext()) {
- DiskFileItem fileItem = (DiskFileItem) it.next();
- // 如果是普通字段
- if (fileItem.isFormField()) {
- System.out.println(fileItem.getFieldName()
- + " "
- + fileItem.getName()
- + " "
- + new String(fileItem.getString().getBytes(
- "iso8859-1"), "gbk"));
- } else {
- System.out.println(fileItem.getFieldName() + " "
- + fileItem.getName() + " "
- + fileItem.isInMemory() + " "
- + fileItem.getContentType() + " "
- + fileItem.getSize());
- // 保存文件,其实就是把缓存里的数据写到目标路径下
- if (fileItem.getName() != null && fileItem.getSize() != 0) {
- File fullFile = new File(fileItem.getName());
- File newFile = new File("d:\\download\\"
- + fullFile.getName());
- try {
- fileItem.write(newFile);
- } catch (Exception e) {
- e.printStackTrace();
- }
- } else {
- System.out.println("文件没有选择 或 文件内容为空");
- }
- }
- }
- }
- }
- }
限于本人水平有限,有很多地方写的并不完美,希望大家不吝赐教.
源码下载地址: http://download.csdn.net/detail/lk_blog/4404383