Java 获取错误500内部服务器错误

HTTP状态500-内部服务器错误

类型异常报告

消息内部服务器错误

说明服务器遇到内部错误，无法满足此请求

例外情况 javax.servlet.ServletException:Class test.testing1不是servlet

根本原因 java.lang.ClassCastException:test.testing1不能强制转换为javax.servlet.servlet

public class testing1 extends PDFTOEXCEL implements Servlet {
    protected void processRequest(HttpServletRequest request, HttpServletResponse response) throws IOException {
        response.setContentType("text/html;charset=UTF-8");
        try (PrintWriter out = response.getWriter()) {
            out.println("converted sucessfully");
        }
    }

    @Override
    public void destroy() {
        // TODO Auto-generated method stub

    }

    @Override
    public void init(ServletConfig config) throws ServletException {
        // TODO Auto-generated method stub

    }

    @Override
    public void service(ServletRequest req, ServletResponse res) throws ServletException, IOException {
        processRequest((HttpServletRequest)req, (HttpServletResponse)res);

    }
}

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请包括

web.xml

文件中的相关部分，以及您认为已配置为servlet的类中的代码。您的testing1类没有直接或间接实现servlet接口。如何解决此问题problem@DarshanAkumar,请共享您的testing1类代码。公共类testing1扩展PDFTOEXCEL{受保护的void processRequest（HttpServletRequest，HttpServletResponse）抛出IOException{response.setContentType（“text/html；charset=UTF-8”）；try（PrintWriter out=response.getWriter（））{out.println(“已成功转换”）；}}}