javax.servlet.ServletException: Servlet执行抛出一个异常怎么解决？

javax.servlet.ServletException: Servlet执行抛出一个异常怎么解决？

站长亲测

1. 数据库版本过高会导致报错 Http状态 500 - 内部服务器错误

2. 如果未在WEBapp导入lib库会导致500报错

HTTP状态 500 - 内部服务器错误类型 异常报告消息 Servlet执行抛出一个异常描述 服务器遇到一个意外的情况，阻止它完成请求。例外情况javax.servlet.ServletException: Servlet执行抛出一个异常org.apache.Tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)根本原因。java.lang.NoClassDefFoundError: org/apache/ibatis/io/ResourcesRequest.LoginServlet.doGet(LoginServlet.java:29)javax.servlet.http.httpservlet.service(HttpServlet.java:488)javax.servlet.http.HttpServlet.service(HttpServlet.java:582)org.apache.tomcat.webSocket.server.WsFilter.doFilter(WsFilter.java:52)根本原因。java.lang.ClassNotFoundException: org.apache.ibatis.io.Resourcesorg.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1420)org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1228)Request.LoginServlet.doGet(LoginServlet.java:29)javax.servlet.http.HttpServlet.service(HttpServlet.java:488)javax.servlet.http.HttpServlet.service(HttpServlet.java:582)org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)):注意 主要问题的全部 stack 信息可以在 server logs 里查看Apache Tomcat/8.5.87

            org.mybatis        mybatis        3.5.5                    Mysql        mysql-connector-java        5.1.46    

<?xml version="1.0" encoding="UTF-8"?><project xmlns="http://Maven.apache.org/POM/4.0.0"         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">    <modelVersion>4.0.0</modelVersion>    <groupId>org.example</groupId>    <artifactId>Maven-Mybatis-Servlet-spring-0408</artifactId>    <version>1.0-SNAPSHOT</version>    <packaging>war</packaging>    <properties>        <maven.compiler.source>20</maven.compiler.source>        <maven.compiler.target>20</maven.compiler.target>        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>    </properties>    <dependencies>        <!--导入Servlet依赖坐标-->        <dependency>            <groupId>javax.servlet</groupId>            <artifactId>javax.servlet-api</artifactId>            <version>3.1.0</version>            <!--              此处为什么需要添加该标签?              provided指的是在编译和测试过程中有效,最后生成的war包时不会加入               因为Tomcat的lib目录中已经有servlet-api这个jar包，如果在生成war包的时候生效就会和Tomcat中的jar包冲突，导致报错            -->            <scope>provided</scope>        </dependency>        <!-- mysql坐标 --><!--        <dependency>--><!--            <groupId>mysql</groupId>--><!--            <artifactId>mysql-connector-java</artifactId>--><!--            <version>5.1.32</version>--><!--        </dependency>-->        <!--mybatis 依赖-->        <dependency>            <groupId>org.mybatis</groupId>            <artifactId>mybatis</artifactId>            <version>3.5.5</version>        </dependency>        <!--mysql 驱动-->        <dependency>            <groupId>mysql</groupId>            <artifactId>mysql-connector-java</artifactId>            <version>5.1.46</version>        </dependency>        <!--junit 单元测试-->        <dependency>            <groupId>junit</groupId>            <artifactId>junit</artifactId>            <version>4.13</version>            <scope>test</scope>        </dependency>        <!-- 添加slf4j日志api -->        <dependency>            <groupId>org.slf4j</groupId>            <artifactId>slf4j-api</artifactId>            <version>1.7.20</version>        </dependency>        <!-- 添加logback-classic依赖 -->        <dependency>            <groupId>ch.qos.logback</groupId>            <artifactId>logback-classic</artifactId>            <version>1.2.3</version>        </dependency>        <!-- 添加logback-core依赖 -->        <dependency>            <groupId>ch.qos.logback</groupId>            <artifactId>logback-core</artifactId>            <version>1.2.3</version>        </dependency>        <dependency>            <groupId>org.apache.tomcat</groupId>            <artifactId>tomcat-websocket</artifactId>            <version>10.1.7</version>        </dependency>        <dependency>            <groupId>org.webjars.npm</groupId>            <artifactId>gulp-insert</artifactId>            <version>0.5.0</version>        </dependency>    </dependencies></project>

来源地址：https://blog.csdn.net/qq_44724480/article/details/130037714