📄 back.java
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package project1;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.*;
import javax.servlet.http.*;
public class back extends HttpServlet {
private static final String CONTENT_TYPE = "text/html; charset=GBK";
public void init(ServletConfig config) throws ServletException {
super.init(config);
}
public void service(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {response.setContentType(CONTENT_TYPE);
PrintWriter out = response.getWriter();
out.println("<html>");
out.println("<head><title>back</title></head>");
out.println("<body>");
out.print("对不起，请您先登录，谢谢");
response.setHeader("Refresh","2;URL=login.jsp");
out.println("</body></html>");
out.close();
}
}
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