javaweb文件上传中文乱码

来源：互联网发布：网络病毒的加密技术编辑：程序博客网时间：2024/06/05 22:48

文件上传小例子：
问题：
前提：response.setContentType(“text/html;charset=UTF-8”);
request.setCharacterEncoding(“UTF-8”);
利用servletFileUpload.parseRequest(request)解析了之后，输出的普通表单项的值有中文乱码问题。
解决方法：
fileItem.getString(“UTF-8”)：注意UTF-8的问题

public class UploadServlet extends HttpServlet {    public void doGet(HttpServletRequest request, HttpServletResponse response)            throws ServletException, IOException {        doPost(request, response);    }    public void doPost(HttpServletRequest request, HttpServletResponse response)            throws ServletException, IOException {        response.setContentType("text/html;charset=UTF-8");        request.setCharacterEncoding("UTF-8");        // 创建工厂        DiskFileItemFactory diskFileItemFactory = new DiskFileItemFactory();        // 创建解析器        ServletFileUpload servletFileUpload = new ServletFileUpload(diskFileItemFactory);        try {            // 解析request，包含普通表单项和文件表单项            List<FileItem> fileItems = servletFileUpload.parseRequest(request);            for (FileItem fileItem : fileItems) {                // isFormField()判断是否为普通表单项                if (fileItem.isFormField()) {                    // getFieldName()获取表单名                    String fieldName = fileItem.getFieldName();                    if (fieldName.equals("username")) {                        // 获取表单项的value，注意"UTF-8"                        fileItem.getString("UTF-8");                        response.getWriter().print("用户名：" + fileItem.getString("UTF-8") + "<br/>");                    }                } else {                    String fieldName = fileItem.getFieldName();                    // 获取文件表单项的文件名getName()                    String fileName = fileItem.getName();                    if (fileName == null || fileName.isEmpty()) {                        // 说明没有上传文件，处理...                    }                    String savePath = this.getServletContext().getRealPath("/WEB-INF/uploads");                    File file = new File(savePath, fileName);                    // 上传文件到服务器                    fileItem.write(file);                    response.getWriter().print("表单名：" + fieldName + "文件名：" + fileName + "<br/>");                    response.getWriter().print("文件大小： " + fileItem.getSize() + "<br/>");                    response.getWriter().print("文件类型： " + fileItem.getContentType() + "<br/>");                }            }        } catch (FileUploadException e) {            e.printStackTrace();        } catch (Exception e) {            e.printStackTrace();        }    }}

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