tomcat 中BASIC and FORM-based Authorization 配置

   Tomcat中自身具有认证功能，配置也比较简单，步骤如下：
1、在所在web项目的web.xml文件添加如下配置代码：
<security-constraint>
      <display-name>Example Security Constraint</display-name>
      <web-resource-collection>
         <web-resource-name>Protected Area</web-resource-name>
<!-- Define the context-relative URL(s) to be protected -->
         <url-pattern>/jsp/*</url-pattern>
<!-- If you list http methods, only those methods are protected -->
<http-method>DELETE</http-method>
          <http-method>GET</http-method>
          <http-method>POST</http-method>
<http-method>PUT</http-method>
      </web-resource-collection>
      <auth-constraint>
         <!-- Anyone with one of the listed roles may access this area -->
         <role-name>gallop</role-name>
      </auth-constraint>
    </security-constraint>
    <!-- Define the Login Configuration for this Application -->
  <login-config>
    <auth-method>BASIC</auth-method>
    <realm-name>Tomcat Host Manager Application</realm-name>
  </login-config>
    <!-- Security roles referenced by this web application -->
    <security-role>
      <role-name>gallop</role-name>
    </security-role>
2、在tomcat的安装目录下的conf下，找到tomcat-users.xml文件，添加相关的用户名：
<role rolename="gallop"/>
<user username="gallop" password="123456" roles="gallop"/>
3、重新启动tomcat后，访问该项目jsp目录下的jsp页面时将弹出登入框，提示需要用户名、密码方可访问相关页面。