1.看看project -- Build Automatically有没有勾上?如果没有,勾上以后,clean
一下,重启eclipse;
2.看看你的lib里面有没有不用的jar包
,看你的.classpath文件中有没有错误的路径;
3.这是最重要的一点,有problems视图中查看有没有关于本项目的错误信息,一般都会有这样的话: The project cannot
be built until build path errors are resolved 然后下面提示unbound classpath,
一般在.classpath中删除
这些path就可以了;
*4.
安装Tomcat后,确保{tomcat_home}/common/lib文件夹下有jasper-runtime.jar、jsp-api.jar、
servlet-api.jar、jndi.jar几个文件。启动Eclipse,第一次启动会有一个配置过程,选择菜单上的
window/preferences,选java/classpath
variables,New添加一个名为JDK_TOOLS并指向你的{jdk_home}/lib/tools.jar的环境变量。
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