Eclipse导入项目后JSP页面出现报红

Multiple annotations found at this line:
- javax.servlet.jsp.JspException cannot be resolved to a type
- Attribute (width) is obsolete. Its use is discouraged in HTML5 
 documents.

- javax.servlet.jsp.JspException cannot be resolved to a type

解决步骤：

1、右键项目-build path

2、选择configure build path...

3、选择 java build path

4、Add Library –> server Runtime -> Click Next

5、选择  Server runtime (我的是 Tomcat 7.0) –>完成