android上传图片到javaweb服务端，android+和struts2
客户端代码：
HttpAssist.java
package com.sevnce.apps.phone.modelall.actionall;
import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
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.util.UUID;
import org.apache.http.HttpVersion;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.FileEntity;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.params.CoreProtocolPNames;
public class HttpAssist {
private static final String TAG = "uploadFile";
private static final int TIME_OUT = 10 * 10000000; // 超时时间
private static final String CHARSET = "utf-8"; // 设置编码
public static final String SUCCESS = "1";
public static final String FAILURE = "0";
public static String uploadFile(File file) {
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
String RequestURL = "http://localhost:8080/phone/phone_account!updateUserInfo.do?userId=7&updateType=headPhoto";
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，把文件包装并且上传
*/
OutputStream outputSteam = conn.getOutputStream();
DataOutputStream dos = new DataOutputStream(outputSteam);
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=\"headPhotoUrl\"; 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) {
return SUCCESS;
}
}
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return FAILURE;
}
public static void main(String[] args) {
File file = new File("C:/Users/sevnce/Desktop/QQ图片20170206211126.png");
if(!file.exists()){
System.out.println( "图片不存在");
}
HttpAssist.uploadFile(file);
}
} Javaweb服务端代码：
@Override
public String uploadHeadPhoto(HttpServletRequest request) {
// 文件保存目录路径
String savePath = request.getSession().getServletContext().getRealPath("/") + "images/headPhoto/";
// 文件保存目录URL
String saveUrl = request.getContextPath() + "/images/headPhoto/";
// 最大文件大小
long maxSize = 1000000;
// Struts2 请求 包装过滤器
MultiPartRequestWrapper wrapper = (MultiPartRequestWrapper) request;
// 获取上传文件名
String fileName = wrapper.getFileNames("headPhotoUrl")[0];
// 获得文件过滤器
File file = wrapper.getFiles("headPhotoUrl")[0];
// 得到上传文件的扩展名
String fileExt = fileName.substring(fileName.lastIndexOf(".") + 1).toLowerCase();
// 检查文件大小
if (file.length() > maxSize) {
return null;
}
// 检查目录
File uploadDir = new File(savePath);
if (!uploadDir.isDirectory()) {
// ajaxPri(getError("上传目录不存在。"));
// return null;
uploadDir.mkdirs();
}
// 检查目录写入权限
if (!uploadDir.canWrite()) {
return null;
}
// 重构上传图片的名称
SimpleDateFormat df = new SimpleDateFormat("yyyyMMddHHmmss");
String newImgName = df.format(new Date()) + "_" + new Random().nextInt(1000) + "." + fileExt;
// 设置 KE 中的图片文件地址
String newFileName = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort() + saveUrl + newImgName;
byte[] buffer = new byte[1024];
FileOutputStream fos = null;
InputStream in = null;
try {
// 获取文件输出流
fos = new FileOutputStream(savePath + newImgName);
// 获取内存中当前文件输入流
in = new FileInputStream(file);
int num = 0;
while ((num = in.read(buffer)) > 0) {
fos.write(buffer, 0, num);
}
} catch (Exception e) {
e.printStackTrace();
return null;
} finally {
try {
in.close();
fos.close();
} catch (Exception e) {
e.printStackTrace();
}
}
return "/images/headPhoto/" + newImgName;
}
