手动创建第一个JAVA WEB项目时，编译DispatcherServlet.java出现错误

[zsd66666]

错误如下 :
代码全跟着书上敲的 如下：

package mypack;
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.util.*;
public class DispatcherServlet extends GenericServlet{
private String target = "/hello.jsp";
public void service(ServletRequest request ,ServletResponse response)
throws ServletException, IOException{
String username = request.getParameter("username");
String password = request.getParameter("password");
request.setAttribute("USER", username);
request.setAttribute("PASSWORD",password);
ServletContext context = getServletContext();
RequestDispatcher dispatcher = context.getRequestDispatcher(target);
dispacher.forward(request, response);
}
}

困扰一上午了，跟着书一步一步来的，实在不知道为什么会出现这个错误

[zsd66666]

已解决 ，编码问题

[weixin_50357980]

怎么不行咋啊