为什么我用jbuilder做jsp项目时会报下面这种错误?是不是配置有问题啊?(下面的全是错误)"Servlet1.java": package javax.servlet does not exist at line 3, column 1
"Servlet1.java": package javax.servlet.http does not exist at line 4, column 1
"Servlet1.java": package javax.servlet does not exist at line 7, column 22
"Servlet1.java": cannot find symbol; symbol: class HttpServlet at line 9, column 31
"Servlet1.java": cannot find symbol; symbol : class ServletException, location: class custmer.Servlet1 at line 13, column 31
"Servlet1.java": cannot find symbol; symbol : class HttpServletRequest, location: class custmer.Servlet1 at line 17, column 23
"Servlet1.java": cannot find symbol; symbol : class HttpServletResponse, location: class custmer.Servlet1 at line 17, column 51
"Servlet1.java": cannot find symbol; symbol : class ServletException, location: class custmer.Servlet1 at line 18, column 13
"Servlet1.java": cannot find symbol; symbol : class HttpServletRequest, location: class custmer.Servlet1 at line 43, column 24
"Servlet1.java": cannot find symbol; symbol : class HttpServletResponse, location: class custmer.Servlet1 at line 43, column 52
"Servlet1.java": cannot find symbol; symbol : class ServletException, location: class custmer.Servlet1 at line 44, column 13
"WebModule1": servlet1 servlet class: "custmer.Servlet1" does not implement the interface javax.servlet.Servlet.
"Servlet1.java": package javax.servlet.http does not exist at line 4, column 1
"Servlet1.java": package javax.servlet does not exist at line 7, column 22
"Servlet1.java": cannot find symbol; symbol: class HttpServlet at line 9, column 31
"Servlet1.java": cannot find symbol; symbol : class ServletException, location: class custmer.Servlet1 at line 13, column 31
"Servlet1.java": cannot find symbol; symbol : class HttpServletRequest, location: class custmer.Servlet1 at line 17, column 23
"Servlet1.java": cannot find symbol; symbol : class HttpServletResponse, location: class custmer.Servlet1 at line 17, column 51
"Servlet1.java": cannot find symbol; symbol : class ServletException, location: class custmer.Servlet1 at line 18, column 13
"Servlet1.java": cannot find symbol; symbol : class HttpServletRequest, location: class custmer.Servlet1 at line 43, column 24
"Servlet1.java": cannot find symbol; symbol : class HttpServletResponse, location: class custmer.Servlet1 at line 43, column 52
"Servlet1.java": cannot find symbol; symbol : class ServletException, location: class custmer.Servlet1 at line 44, column 13
"WebModule1": servlet1 servlet class: "custmer.Servlet1" does not implement the interface javax.servlet.Servlet.
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