javax.servlet.ServletException: Servlet执行抛出一个异常怎么解决?
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- 数据库版本过高会导致报错 HTTP状态 500 - 内部服务器错误
- 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/Resources
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)
根本原因。
java.lang.ClassNotFoundException: org.apache.ibatis.io.Resources
org.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
<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>
<?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>
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