Question

1.i为java添加了路径C：\ Program Files（x86）\ Java \ jdk1.6.0_01 \ bin，为tomcat添加了C：\ TOMCAT \ apache-tomcat-7.0.55 \ lib。

2.i已在C：\ TOMCAT \ apache-tomcat-7.0.55 \ bin中启动startup.bat并且工作正常。

3.it显示在8084端口（localhost：8084 /）。

4.i在目录E中创建了一个MyServlet.java文件。

5.i想通过命令行（javac MyServlet.java）编译它，错误来了。

我已经尝试过并尝试过b：..（.. plz帮我修复它。

MyServlet.java代码：

import javax.servlet.*; 
import javax.servlet.http.*;
import java.io.*;
import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class MyServlet extends  HttpServlet
{
public void doGet(HttpServletRequest request,HttpServletResposne response) 
                 throws ServletException
{
response.setContentType("text/html");
PrintWriter out = response.getWriter();
out.println("<html><body>");
out.println("<h1>Hello Readers</h1>");
out.println("</body></html>");
} 
}

和cmd错误：

E:\>javac MyServlet.java
MyServlet.java:1: package javax.servlet does not exist
import javax.servlet.*;
^
MyServlet.java:2: package javax.servlet.http does not exist
import javax.servlet.http.*;
^
MyServlet.java:7: package javax.servlet does not exist
import javax.servlet.ServletException;
                ^
MyServlet.java:8: package javax.servlet.http does not exist
import javax.servlet.http.HttpServlet;
                     ^
MyServlet.java:9: package javax.servlet.http does not exist
import javax.servlet.http.HttpServletRequest;
                     ^
MyServlet.java:10: package javax.servlet.http does not exist
import javax.servlet.http.HttpServletResponse;
                     ^
MyServlet.java:12: cannot find symbol
symbol: class HttpServlet
public class MyServlet extends  HttpServlet
                            ^
MyServlet.java:14: cannot find symbol
symbol  : class HttpServletRequest
location: class MyServlet
public void doGet(HttpServletRequest request,HttpServletResposne response)
              ^
MyServlet.java:14: cannot find symbol
symbol  : class HttpServletResposne
location: class MyServlet
public void doGet(HttpServletRequest request,HttpServletResposne response)
                                         ^
MyServlet.java:15: cannot find symbol
symbol  : class ServletException
location: class MyServlet
                 throws ServletException
                        ^
10 errors

Answer 1

Declaring Class

public class MyServlet extends  HttpServlet

而不是

public MyServlet extends  HttpServlet

Answer 2

在定义类时忘记关键字class，只需将class放在类名

之前

java servlet编译错误

2 个答案: