jsp解决导入项目后出现：Multiple annotations found at this line: - String cannot be resolved to a type - No

今天导入一个项目后出现：

Multiple annotations found at this line:
	- String cannot be resolved to a type
	- No exception of type ServletException can be thrown; an exception type must be a 
	 subclass of Throwable
	- The method getContextPath() from the type HttpServletRequest refers to the missing type 
	 String
	- java.io.IOException cannot be resolved to a type
	- The type java.util.Map cannot be resolved. It is indirectly referenced from required .class 
	 files

然后就是一大堆jsp文件报错:

解决办法：
一、

找到Libraries下面报错的包，移除掉。

二、

三、如果以上步骤以后还是不行的话继续下一步：

右击项目，选择Java Build Path>Libraries>Add External JARS,找到你计算机中的tomcat的安装路径，在common/lib文件夹下，选中"servlet-api.jar"和“jsp-api.jar”,添加点击“确定”,就行了