javaweb文件上传中文乱码

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 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") + "
");
                    }
                } 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 + "
");
                    response.getWriter().print("文件大小： " + fileItem.getSize() + "
");
                    response.getWriter().print("文件类型： " + fileItem.getContentType() + "
");
                }
            }
        } catch (FileUploadException e) {
            e.printStackTrace();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}