获取项目的根路径（后台，前段两种手段）_通过filterconfig获取项目根路径-优快云博客

本文链接：https://blog.youkuaiyun.com/u012031380/article/details/75389445

本文介绍两种获取Web项目路径的方法：一是通过自定义过滤器在Java后台设置并传递项目路径；二是直接在前端页面使用JSP内置对象获取项目路径。文中提供了具体的实现代码及示例。

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1.通过能过滤器添加

public class ContextPathFilter implements Filter {
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {

    }

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain)

			throws IOException, ServletException {

        String path = ((HttpServletRequest)servletRequest).getContextPath();

        String basepath = path;
        servletRequest.setAttribute("CP", basepath);
        filterChain.doFilter(servletRequest, servletResponse);
    }

    @Override
    public void destroy() {

    }
}

当然了还得添加到web.xml

<filter>
    <filter-name>ContextPathFilter</filter-name>
    <filter-class>com.person.core.web.ContextPathFilter</filter-class>
</filter>
<filter-mapping>
    <filter-name>ContextPathFilter</filter-name>
    <url-pattern>/*</url-pattern>
</filter-mapping>

剩下的前台引用就可以了

<link rel="stylesheet" type="text/css" href="${CP}/css/style.css"/>

<script type="text/javascript">
    var basePath = '${CP}';
</script>

2.就是前端页面直接获取（摘自点击打开链接）

 
  一.js  
 a.'${pageContext.request.contextPath}'//结果:/projectName  
 b.'<%=request.getContextPath()%>'//结果:/projectName  
 用法：  
 <script>  
 function searchData(dom){  
    $(dom).attr('disabled', true);  
    var url = '${pageContext.request.contextPath}/OrderController/getOrders.mmx?'+$('#orderForm').serialize();  
    var url = '<%=request.getContextPath()%>'+'/OrderController/getOrders.mmx?'+$('#orderForm').serialize();  
    $('#dataDiv').html('数据加载中...').load(url, function(){  
       $(dom).attr('disabled', false);  
    });  
 }  
 <script>  
 

[html]view plain copy 
   
 二.jsp  
 a.<%=request.getContextPath()%>//结果:/projectName  
 b.${pageContext.request.contextPath}//结果:/projectName  
 用法：  
 <link rel="stylesheet" type="text/css" href="${pageContext.request.contextPath}/order/css/OrderCss.css" />   
 <link rel="stylesheet" type="text/css" href=<%=request.getContextPath()%>+"/order/css/OrderCss.css" />   