javax.servlet.jar包 官方免费版

javax.servlet jar是专为开发者打造的一款java依融包，javax.servlet.jar包可以解决找不到javax.servlet.*等问题，如果在提示的时候提示不存，可以在本站下载然后放到指定的目录后就可以正常使用了，需要此款jar包的朋友们欢迎前来下载使用。

常见问题

编译时错误：软件包 javax.servlet.http 不存在import javax.servlet.http.HttpServletRequest;

解决办法：

1、 把servlet-api.jar加到classpath中，如

把%CATALINA_HOME%\lib;%CATALINA_HOME%\lib\servlet-api.jar;%CATALINA_HOME%\lib\jsp-api.jar 加到classpath变量的后面。

2、 把Tomcat目录下的 tomcat\lib\servlet-api.jar 拷贝到 Java\jdk1.6.0_22\jre\lib\ext 目录下。

3、 javac时把相关的类没有加到-classpath选项中去，如：

编译时使用：javac -classpath ./test.jar TestJar.java

运行时使用：java -cp .:./test.jar TestJar 才可以运行。

请问这里为什么javac使用-classpath，java使用-cp?难道classpath不等价于cp? 没有区别，除了一个是缩写，一个是全称之外，功能是一模一样的。

包括：

javax.servlet.Filter

javax.servlet.Servlet

javax.servlet.FilterChain

javax.servlet.http.Cookie

javax.servlet.jsp.JspPage

javax.servlet.FilterConfig

javax.servlet.ServletConfig

javax.servlet.jsp.ErrorData

javax.servlet.jsp.JspWriter

javax.servlet.GenericServlet

javax.servlet.ServletContext

javax.servlet.ServletRequest

javax.servlet.http.HttpUtils

javax.servlet.jsp.JspContext

javax.servlet.jsp.JspFactory

javax.servlet.jsp.tagext.Tag

javax.servlet.ServletResponse

javax.servlet.jsp.HttpJspPage

javax.servlet.jsp.PageContext

javax.servlet.ServletException

javax.servlet.http.HttpServlet

javax.servlet.http.HttpSession

javax.servlet.jsp.JspException

javax.servlet.RequestDispatcher

javax.servlet.SingleThreadModel

javax.servlet.jsp.JspEngineInfo

javax.servlet.jsp.el.Expression

javax.servlet.jsp.tagext.JspTag

javax.servlet.ServletInputStream

javax.servlet.jsp.el.ELException

javax.servlet.jsp.tagext.BodyTag

javax.servlet.jsp.tagext.TagData

javax.servlet.jsp.tagext.TagInfo

javax.servlet.ServletContextEvent

javax.servlet.ServletOutputStream

javax.servlet.ServletRequestEvent

javax.servlet.http.NoBodyResponse

javax.servlet.jsp.JspTagException

javax.servlet.jsp.tagext.PageData

javax.servlet.UnavailableException

javax.servlet.jsp.tagext.SimpleTag

javax.servlet.ServletRequestWrapper

javax.servlet.http.HttpSessionEvent

javax.servlet.jsp.SkipPageException

javax.servlet.jsp.el.FunctionMapper

javax.servlet.jsp.tagext.TagAdapter

javax.servlet.jsp.tagext.TagSupport

javax.servlet.ServletContextListener

javax.servlet.ServletRequestListener

javax.servlet.ServletResponseWrapper

javax.servlet.jsp.tagext.BodyContent

javax.servlet.jsp.tagext.JspFragment

javax.servlet.jsp.tagext.TagFileInfo

javax.servlet.http.HttpServletRequest

javax.servlet.http.HttpSessionContext

javax.servlet.http.NoBodyOutputStream

javax.servlet.jsp.el.ELParseException

javax.servlet.jsp.el.VariableResolver

javax.servlet.jsp.tagext.FunctionInfo

javax.servlet.jsp.tagext.IterationTag

javax.servlet.jsp.tagext.TagExtraInfo

javax.servlet.jsp.tagext.VariableInfo

javax.servlet.http.HttpServletResponse

javax.servlet.http.HttpSessionListener

javax.servlet.jsp.tagext.BodyTagSupport

javax.servlet.jsp.tagext.TagLibraryInfo

javax.servlet.jsp.el.ExpressionEvaluator

javax.servlet.jsp.tagext.TagVariableInfo

javax.servlet.jsp.tagext.TryCatchFinally

javax.servlet.jsp.tagext.SimpleTagSupport

javax.servlet.jsp.tagext.TagAttributeInfo

javax.servlet.ServletContextAttributeEvent

javax.servlet.ServletRequestAttributeEvent

javax.servlet.http.HttpSessionBindingEvent

javax.servlet.jsp.tagext.DynamicAttributes

javax.servlet.jsp.tagext.ValidationMessage

javax.servlet.http.HttpServletRequestWrapper

javax.servlet.jsp.tagext.TagLibraryValidator

javax.servlet.ServletContextAttributeListener

javax.servlet.ServletRequestAttributeListener

javax.servlet.http.HttpServletResponseWrapper

javax.servlet.http.HttpSessionBindingListener

javax.servlet.http.HttpSessionAttributeListener

javax.servlet.http.HttpSessionActivationListener