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[英]web.xml and @WebServlet priority when two rules match (according to Servlet 3.0 spec)
[英]How to convert web.xml to @WebServlet?
我有一個帶有Servlet 3.1的Web應用程序,並且具有不帶@WebFilter批注的Servlet過濾器,並且工作正常。
我想用@WebServlet注釋替換它,但使用相同的舊過濾器而不創建新的過濾器類並在舊過濾器類中使用@WebFilter。 以下是我的web.xml文件。
<web-app version="3.1"
xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee
http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd">
<display-name>Archetype Created Web Application</display-name>
<filter>
<display-name>User Auth Filter</display-name>
<filter-name>UserAuthFilter</filter-name>
<filter-class>com.example.UserAuthFilter</filter-class>
<async-supported>true</async-supported>
<init-param>
<param-name>checkUser</param-name>
<param-value>true</param-value>
</init-param>
<init-param>
<param-name>doValidate</param-name>
<param-value>true</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>UserAuthFilter</filter-name>
<url-pattern>/usercount</url-pattern>
</filter-mapping>
<security-constraint>
<web-resource-collection>
<web-resource-name>Services</web-resource-name>
<url-pattern>/usercount</url-pattern>
<http-method>GET</http-method>
</web-resource-collection>
</security-constraint>
<deny-uncovered-http-methods/>
</web-app>
我試圖用下面的servlet替換它。
package com.example;
import javax.servlet.annotation.WebFilter;
import javax.servlet.annotation.WebInitParam;
import javax.servlet.annotation.WebServlet;
@WebServlet
@WebFilter(displayName = "User Auth Filter",
filterName = "UserAuthFilter",
value = "com.example.UserAuthFilter",
asyncSupported = true,
initParams = {
@WebInitParam(name = "checkUser",value = "true"),
@WebInitParam(name = "doValidate",value = "true")
})
public class NotificationWebsocketServlet {
public NotificationWebsocketServlet() {
super();
// TODO Auto-generated constructor stub
}
}
我沒有為過濾器映射和安全約束找到任何注釋。
你能幫我嗎?
對於@WebFilter,您應該能夠將urlPatterns屬性用於過濾器映射。 另外,您應該可以對安全性約束使用@ServletSecurity批注。
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