android上传图片到javaweb服务端，android+和struts2

悠悠 2022-06-17 01:58 154阅读 0赞

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;
    	}

调用直接传个request过来就行了