Java服务器页面和netbeans
我使用NetBeans开发了一个Java服务器页面和netbeans,java,jsp,Java,Jsp,我使用NetBeans开发了一个.jsp网站。当我从NetBeans运行它时,它工作得非常好,但是当我清理并构建项目,从dist文件夹复制.war文件,并复制到TomCat 5.0的webapps文件夹中时,它没有执行.jsp文件 错误显示: exception org.apache.jasper.JasperException: Unable to compile class for JSP org.apache.jasper.compiler.DefaultErro
.jsp
网站。当我从NetBeans运行它时,它工作得非常好,但是当我清理并构建项目,从dist文件夹复制.war
文件,并复制到TomCat 5.0的webapps文件夹中时,它没有执行.jsp
文件
错误显示:
exception
org.apache.jasper.JasperException: Unable to compile class for JSP
org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:97)
org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:346)
org.apache.jasper.compiler.Compiler.generateClass(Compiler.java:414)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:472)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:451)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:439)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:511)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:295)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
root cause
Unable to find a javac compiler;
com.sun.tools.javac.Main is not on the classpath.
Perhaps JAVA_HOME does not point to the JDK
org.apache.tools.ant.taskdefs.compilers.CompilerAdapterFactory.getCompiler(CompilerAdapterFactory.java:106)
org.apache.tools.ant.taskdefs.Javac.compile(Javac.java:935)
org.apache.tools.ant.taskdefs.Javac.execute(Javac.java:764)
org.apache.jasper.compiler.Compiler.generateClass(Compiler.java:382)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:472)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:451)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:439)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:511)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:295)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
例外
org.apache.jasper.jaspereException:无法为JSP编译类
org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:97)
org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:346)
org.apache.jasper.compiler.compiler.generateClass(compiler.java:414)
org.apache.jasper.compiler.compiler.compile(compiler.java:472)
org.apache.jasper.compiler.compiler.compile(compiler.java:451)
org.apache.jasper.compiler.compiler.compile(compiler.java:439)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:511)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:295)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
javaservlet.http.HttpServlet.service(HttpServlet.java:802)
根本原因
找不到javac编译器;
com.sun.tools.javac.Main不在类路径上。
也许JAVA_HOME没有指向JDK
org.apache.tools.ant.taskdefs.compilers.CompilerAdapterFactory.getCompiler(CompilerAdapterFactory.java:106)
org.apache.tools.ant.taskdefs.Javac.compile(Javac.java:935)
org.apache.tools.ant.taskdefs.Javac.execute(Javac.java:764)
org.apache.jasper.compiler.compiler.generateClass(compiler.java:382)
org.apache.jasper.compiler.compiler.compile(compiler.java:472)
org.apache.jasper.compiler.compiler.compile(compiler.java:451)
org.apache.jasper.compiler.compiler.compile(compiler.java:439)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:511)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:295)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
javaservlet.http.HttpServlet.service(HttpServlet.java:802)
有时在清理和构建项目时,NetBeans中会出现错误,MySQL
driver.jar
,即无法删除包含的库。tomcat使用环境变量JAVA\u HOME
,将其设置为指向您的jdk升级您的tomcat,它非常旧!