struts2--实现文字过滤功能

Bertha 。 2024-02-18 00:32 30阅读 0赞

如：

![Center][]

过滤结果：

![Center 1][]

目的是将内容中出现的”北京“替换成"\*\*"

1、过滤器：

package com.Interceptor;
    
    import com.action.FilterAction;
    import com.opensymphony.xwork2.ActionInvocation;
    import com.opensymphony.xwork2.interceptor.AbstractInterceptor;
    
    public class FilterContext extends AbstractInterceptor{
    
    	@Override
    	public String intercept(ActionInvocation invocation) throws Exception {
            Object action = invocation.getAction();
            if(action != null){
            	 if(action instanceof FilterAction){
                 	FilterAction filterAction = (FilterAction)action;
                 	String context = filterAction.getContext();
                 	if(context.contains("北京")){
                 		context = context.replaceAll("北京", "**");
                 		filterAction.setContext(context);
                 	}
                 	return "success";
                 }     	
            }
            return "login";
    	}
      
    }

2、Action:

package com.action;
    
    import com.opensymphony.xwork2.ActionSupport;
    
    public class FilterAction extends ActionSupport {
       private String head;
       private String context;
       
       public String  execute() {
    	return SUCCESS;
    }
    public String getHead() {
    	return head;
    }
    public void setHead(String head) {
    	this.head = head;
    }
    public String getContext() {
    	return context;
    }
    public void setContext(String context) {
    	this.context = context;
    }
    }

3、filter.jsp页面：

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
    <%@ taglib prefix = "s" uri = "/struts-tags" %>
    <%
    String path = request.getContextPath();
    String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
    %>
    
    <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
    <html>
      <head>
        <base href="<%=basePath%>">
        
        <title>My JSP 'filter.jsp' starting page</title>
        
    	<meta http-equiv="pragma" content="no-cache">
    	<meta http-equiv="cache-control" content="no-cache">
    	<meta http-equiv="expires" content="0">    
    	<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
    	<meta http-equiv="description" content="This is my page">
    	
    
      </head>
      
      <body>
       <s:form action = "filter" method = "post">
         <s:textfield name = "head" label = "标题" ></s:textfield>
         <s:textarea name = "context" label = "内容" rows="10" cols="40"></s:textarea>
         <s:submit value = "过滤" ></s:submit>
       </s:form>
      </body>
    </html>

4、filter\_ok.jsp:

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
    <%@ taglib prefix = "s" uri = "/struts-tags" %>
    <%
    String path = request.getContextPath();
    String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
    %>
    
    <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
    <html>
      <head>
        <base href="<%=basePath%>">
        
        <title>My JSP 'filter_ok.jsp' starting page</title>
        
    	<meta http-equiv="pragma" content="no-cache">
    	<meta http-equiv="cache-control" content="no-cache">
    	<meta http-equiv="expires" content="0">    
    	<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
    	<meta http-equiv="description" content="This is my page">
    	
    
      </head>
      
      <body>
       标题：<s:property value = "head"/><br><br>
       内容：<s:property value = "context"/>
      </body>
    </html>

5、struts.xml配置：

<action name="filter" class = "com.action.FilterAction">
           <result>/filter_ok.jsp</result>
           <result name = "login">/filter.jsp</result>
           <interceptor-ref name="defaultStack"/>
           <interceptor-ref name="filterInterceptor"/>
         </action>

[Center]: https://image.dandelioncloud.cn/pgy_files/images/2024/01/29/5db5a98b928e4a768c1ef1b9d9c7e587.png
[Center 1]: https://image.dandelioncloud.cn/pgy_files/images/2024/01/29/bb4ab79d4b0c4db18bcdece7775e1ad2.png