Tomcat7安全示例如何調用login.jsp？

Question

如果我第一次打開示例網址http://localhost:8080/examples/jsp/security/protected/index.jsp，我將會看到登錄表單，其中username和password字段。此表單的Html代碼位於login.jsp文件中，但我看不到任何代碼可以從index.jsp中調用它。這個通話如何完成？

Answer 1

它在相應的web.xml定義：

<!-- Default login configuration uses form-based authentication --> 
<login-config> 
    <auth-method>FORM</auth-method> 
    <realm-name>Example Form-Based Authentication Area</realm-name> 
    <form-login-config> 
    <form-login-page>/jsp/security/protected/login.jsp</form-login-page> 
    <form-error-page>/jsp/security/protected/error.jsp</form-error-page> 
    </form-login-config> 
</login-config> 

你找到<tomcat>/webapps/examples/WEB-INF文件。它利用內置的Java EE安全功能。前面的security-constraint部分定義了要保護的資源：

<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/security/protected/*</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>tomcat</role-name> 
     <role-name>role1</role-name> 
     </auth-constraint> 
    </security-constraint>