White spaces are required between publicId and sys

spring IOC 启动的时候，会报这个错误。

Caused by: org.xml.sax.SAXParseException; systemId: http://www.springframework.org/schema/tx/spring-tx-3.0.xsd; lineNumber: 1; columnNumber: 50; White spaces are required between publicId and systemId.

Reasons: i think the most possible reasons is that you lost the jar. 最有可能得状况是没有在classpath里面添加该jar。

Solution： check if you have the jar and add to your classpath. 检查在工程里面是否有该jar.

Affiliated：spring beans example. spring xmls example.

<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:context="http://www.springframework.org/schema/context"
	xmlns:aop="http://www.springframework.org/schema/aop"
	xmlns:tx="http://www.springframework.org/schema/tx" 
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://www.springframework.org/schema/context 
	http://www.springframework.org/schema/context/spring-context.xsd
	http://www.springframework.org/schema/beans 
	http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
	http://www.springframework.org/schema/aop 
	http://www.springframework.org/schema/aop/spring-aop.xsd
	http://www.springframework.org/schema/tx 
	http://www.springframework.org/schema/tx/spring-tx-3.0.xsd">

另外：对于 xmlns 更像是声明这下关键字的（context,aop）的使用空间。xsi：schemalocation更像是相应的文件的路径。