SpirngMVC jsp页面空指针

亦凉 2022-11-20 08:09 129阅读 0赞

SpirngMVC jsp页面空指针 ，这个错误基本上是jar包冲突，我看网上很多的方案

<dependency>
    			<groupId>javax.servlet</groupId>
    			<artifactId>servlet-api</artifactId>
    			<version>3.0-alpha-1</version>
    			<scope>provided</scope>
    		</dependency>
    
    		<dependency>
    			<groupId>javax.servlet.jsp</groupId>
    			<artifactId>javax.servlet.jsp-api</artifactId>
    			<version>2.3.3</version>
    			<scope>provided</scope>
    		</dependency>
    		
    		<dependency>
    			<groupId>javax.servlet</groupId>
    			<artifactId>jstl</artifactId>
    			<version>1.2</version>
    		</dependency>

pom.XML文件中添加scope这个标签

但是还是出现下面的错误

错误提示如下：

org.apache.jasper.JasperException: java.lang.NullPointerException  
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:522)  
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:356)  
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:337)  
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)  
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)  
org.apache.struts2.dispatcher.FilterDispatcher.doFilter(FilterDispatcher.java:416)  
org.apache.struts2.dispatcher.ActionContextCleanUp.doFilter(ActionContextCleanUp.java:99)

原因是上面并没有找出所有的冲突jar

解决方案：

找到pom文件

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2RhdG91bmlhbzE_size_16_color_FFFFFF_t_70][]

搜索框中输入jsp

我们发现还有一个jar 包中包含 ：javax.servlet.jsp-api

<dependency>
    			<groupId>org.springframework.data</groupId>
    			<artifactId>spring-data-hadoop</artifactId>
    			<version>2.5.0.RELEASE</version>
    			<exclusions>
    				<exclusion>
    					<groupId>javax.servlet.jsp</groupId>
    					<artifactId>jsp-api</artifactId>
    				</exclusion>
    			</exclusions>
    		</dependency>

我们将这个jsp 排除在外就可以了

希望对你有所帮助

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