xml报错(xsd):Failed to read schema document

<ehcache xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:noNamespaceSchemaLocation="http://ehcache.org/ehcache.xsd" updateCheck="false">  

上述行报错如下：

Multiple annotations found at this line:
 - cvc-elt.1: Cannot find the declaration of element 'ehcache'.
 - schema_reference.4: Failed to read schema document 'http://ehcache.org/ehcache.xsd', because 1) could not find the document;
 2) the document could not be read; 3) the root element of the document is not <xsd:schema>.

解决办法（本地引入xsd）：

1、在项目里新增文件ehcache.xsd，将文件“http://ehcache.org/ehcache.xsd”内容填入ehcache.xsd里

2、Location：选择这个xsd文件     Key type: Schema location 
     Key: http://ehcache.org/ehcache.xsd