2018.10.5 hibernate導入約束，在Eclipse的xml文件實現自動提示

打開Java Resources/Libraries/hibernate-core-5.3.1.Final.jar/org.hibernate/hibernate-mapping-3.0.dtd（hibernate-mapping-3.0.dtd在org.hibernate包中最底下）在該文件中可找到DTD約束

解壓hibernate.jar包
在org\hibernate目錄下找到hibernate-configuration-3.0.dtd和hibernate-mapping-3.0.dtd
打開Eclipse-->Window-->Preferences-->Web and XML-->XML Catalog
在右邊點擊Add XML Catalog Entry

Key Type：URL 
Key：打開dtd文件粘貼如下路徑 

http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd

http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd

整個項目刷新一下,輸入第一個文檔節點就會自動提示

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
	<class>
		<id>
			<generator class=""></generator>
		</id>
	</class>
</hibernate-mapping>