eclipse报错：Multiple annotations found at this line: - String cannot be resolved to a type解决方法

打开项目发现之前写好的代码竟然出现了错误，看了下这篇文章解决了

Multiple annotations found at this line:
- String cannot be resolved to a type
- The method getContextPath() from the type HttpServletRequest refers to the missing type String

解决办法:

首先 右击该项目 - Build Path - Configure Build Path ， 在 Libraries 选项下，会发现有个出错的jre Libraries，将其Remove掉。

然后 右击该项目 - Build Path - Add Library， 选择JRE System Library，选择Workspace defaulr JRE(jdk1.6)(此前JDK已成功安装并配置好)， 然后 Finish 。