添加此功能主要是为了增加solr服务器的安全性，不能随便让人访问。
1. 在tomcat的F:\Tomcat 6.0.26_solr\conf\tomcat-users.xml添加用户角色并指定访问的用户名密码
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<role rolename="solr"/>
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<user username="admin" password="admin" roles="solr"/>
2. 在F:\Tomcat6.0.26_solr\webapps\solr\WEB-INF\web.xm中添加用户访问权限设置
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<security-constraint>
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<web-resource-collection>
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<web-resource-name>Solr Lockdown</web-resource-name>
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<url-pattern>/</url-pattern>
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<http-method>GET</http-method>
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<http-method>POST</http-method>
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</web-resource-collection>
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<auth-constraint>
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<description>This applies only to the "tomcat" security role</description>
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<role-name>solr</role-name>
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<role-name>admin</role-name>
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</auth-constraint>
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<user-data-constraint>
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<transport-guarantee>NONE</transport-guarantee>
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</user-data-constraint>
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</security-constraint>
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<login-config>
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<auth-method>BASIC</auth-method>
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<realm-name>Solr</realm-name>
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</login-config>
如果弹出此框并且能正常登录，说明已经配置成功
