android 上传图片到服务器Tomcat(Struts2)
在做android开发的时候，有时你会用到图片的上传功能，在我的android项目中，我是选中图片，点击上传多张图片
android客户端上传图片部分的代码如下：
package com.example.myphotos.utils; import java.io.DataOutputStream; import java.io.File; import java.io.FileInputStream; import java.io.IOException; import java.io.InputStream; import java.net.HttpURLConnection; import java.net.MalformedURLException; import java.net.URL; import java.util.UUID; import android.util.Log; public class UploadUtil { 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 /** * 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 int uploadFile(File file, String RequestURL) { int res = 0; 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); if (file != null) { /** * 当文件不为空时执行上传 */ 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 */ sb.append("Content-Disposition: form-data; name=\"file\"; 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 */ res = conn.getResponseCode(); Log.e(TAG, "response code:" + res); if (res == 200) { Log.e(TAG, "request success"); InputStream input = conn.getInputStream(); StringBuffer sb1 = new StringBuffer(); int ss; while ((ss = input.read()) != -1) { sb1.append((char) ss); } result = sb1.toString(); Log.e(TAG, "result : " + result); } else { Log.e(TAG, "request error"); } } } catch (MalformedURLException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } return res; } }
服务器段的代码如下：
服务器端用的Struts2
package www.csdn.image; import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.util.ArrayList; import java.util.List; import java.util.Map; import java.util.Random; import javax.servlet.ServletInputStream; import javax.servlet.http.HttpServletRequest; import org.apache.commons.fileupload.DiskFileUpload; import org.apache.struts2.ServletActionContext; import com.opensymphony.xwork2.Action; import com.opensymphony.xwork2.ActionContext; import com.opensymphony.xwork2.ActionSupport; /** * ImagesAction 2013-6-18 下午9:02:58 * * @author 乔晓松 * */ public class ImagesAction extends ActionSupport { /** * */ private static final long serialVersionUID = 1L; public List<String> list = new ArrayList<String>(); private File file; private String fileContentType; private String fileFileName; public File getFile() { return file; } public void setFile(File file) { this.file = file; } public String getFileContentType() { return fileContentType; } public void setFileContentType(String fileContentType) { this.fileContentType = fileContentType; } public String getFileFileName() { return fileFileName; } public void setFileFileName(String fileFileName) { this.fileFileName = fileFileName; } public List<String> getList() { return list; } public String httpAllImages() { String path = ServletActionContext.getServletContext().getRealPath( "images"); // System.out.println(path); File filePath = new File(path); File[] files = filePath.listFiles(); for (int i = 0; i < files.length; i++) { File file = files[i]; if (!file.isDirectory()) { String fileName = file.getName(); String img = fileName.substring(fileName.lastIndexOf(".") + 1); if ("jpg".equals(img) || "jpeg".equals(img) || "gif".equals(img) || "png".equals(img)) { list.add(fileName); } } } System.out.println(list.size()); return "images"; } @SuppressWarnings("deprecation") public String uploadFile() { System.out.println("-----------------"); System.out.println(fileFileName + "------------------" + file.length()); try { FileInputStream fis = new FileInputStream(file); String photospath = ServletActionContext.getRequest().getRealPath( "photos"); System.out.println(photospath); File fs = new File(photospath, fileFileName); FileOutputStream fos = new FileOutputStream(fs); int len = 0; byte[] buffer = new byte[1024]; while ((len = fis.read(buffer)) != -1) { fos.write(buffer, 0, len); } fos.flush(); fos.close(); fis.close(); } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } return "uploadfile"; }
<?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN" "http://struts.apache.org/dtds/struts-2.3.dtd"> <struts> <include file="struts-constant.xml"></include> <package name="test" namespace="/csdn" extends="json-default"> <action name="ImagesAction_*" class="www.csdn.image.ImagesAction" method="{1}"> <result name="images" type="json">list</result> <result name="uploadfile"></result> </action> </package> </struts>
图片上传：http://topmanopensource.iteye.com/blog/1605238(有例子)。
http://blog.csdn.net/lmj623565791/article/details/23781773
