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HTTP Status 404 – 未找到

404
之前看了其他人的问题还是不太理解什么意思
图片描述
下面是controller的代码

package com.mmall.controller;

import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

@Controller
@RequestMapping("/test")
@Slf4j
public class TestController {

    @RequestMapping("/hello")
    @ResponseBody
    public String hello(){
        log.info("hello");
        return "hello,permission";
    }
}

第一次回复

图片描述
图片描述

下面是tomcat localhost log

17-Feb-2020 14:59:42.926 信息 [RMI TCP Connection(5)-127.0.0.1] org.apache.catalina.core.ApplicationContext.log No Spring WebApplicationInitializer types detected on classpath
17-Feb-2020 14:59:43.060 信息 [RMI TCP Connection(5)-127.0.0.1] org.apache.catalina.core.ApplicationContext.log Initializing Spring root WebApplicationContext
17-Feb-2020 14:59:44.168 严重 [RMI TCP Connection(5)-127.0.0.1] org.apache.catalina.core.StandardContext.listenerStart 异常将上下文初始化事件发送到类的侦听器实例.[org.springframework.web.context.ContextLoaderListener]
	org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dataSource' defined in class path resource [applicationContext.xml]: Invocation of init method failed; nested exception is java.sql.SQLException: com.mysql.cj.jdbc.Driver
		at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1803)
		at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:595)
		at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:517)
		at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:323)
		at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
		at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:321)
		at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202)
		at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:879)
		at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:878)
		at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:550)
		at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:401)
		at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:292)
		at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:103)
		at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4685)
		at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5146)
		at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
		at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:717)
		at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:690)
		at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:705)
		at org.apache.catalina.startup.HostConfig.manageApp(HostConfig.java:1728)
		at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
		at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
		at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
		at java.lang.reflect.Method.invoke(Method.java:498)
		at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:289)
		at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:819)
		at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:801)
		at org.apache.catalina.mbeans.MBeanFactory.createStandardContext(MBeanFactory.java:456)
		at org.apache.catalina.mbeans.MBeanFactory.createStandardContext(MBeanFactory.java:405)
		at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
		at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
		at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
		at java.lang.reflect.Method.invoke(Method.java:498)
		at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:289)
		at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:819)
		at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:801)
		at com.sun.jmx.remote.security.MBeanServerAccessController.invoke(MBeanServerAccessController.java:468)
		at javax.management.remote.rmi.RMIConnectionImpl.doOperation(RMIConnectionImpl.java:1468)
		at javax.management.remote.rmi.RMIConnectionImpl.access$300(RMIConnectionImpl.java:76)
		at javax.management.remote.rmi.RMIConnectionImpl$PrivilegedOperation.run(RMIConnectionImpl.java:1309)
		at java.security.AccessController.doPrivileged(Native Method)
		at javax.management.remote.rmi.RMIConnectionImpl.doPrivilegedOperation(RMIConnectionImpl.java:1408)
		at javax.management.remote.rmi.RMIConnectionImpl.invoke(RMIConnectionImpl.java:829)
		at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
		at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
		at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
		at java.lang.reflect.Method.invoke(Method.java:498)
		at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:357)
		at sun.rmi.transport.Transport$1.run(Transport.java:200)
		at sun.rmi.transport.Transport$1.run(Transport.java:197)
		at java.security.AccessController.doPrivileged(Native Method)
		at sun.rmi.transport.Transport.serviceCall(Transport.java:196)
		at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:573)
		at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:834)
		at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.lambda$run$0(TCPTransport.java:688)
		at java.security.AccessController.doPrivileged(Native Method)
		at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:687)
		at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
		at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
		at java.lang.Thread.run(Thread.java:748)
	Caused by: java.sql.SQLException: com.mysql.cj.jdbc.Driver
		at com.alibaba.druid.util.JdbcUtils.createDriver(JdbcUtils.java:625)
		at com.alibaba.druid.pool.DruidDataSource.init(DruidDataSource.java:897)
		at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
		at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
		at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
		at java.lang.reflect.Method.invoke(Method.java:498)
		at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeCustomInitMethod(AbstractAutowireCapableBeanFactory.java:1929)
		at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1871)
		at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1799)
		... 59 more
	Caused by: java.lang.ClassNotFoundException: com.mysql.cj.jdbc.Driver
		at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1365)
		at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1188)
		at java.lang.Class.forName0(Native Method)
		at java.lang.Class.forName(Class.java:264)
		at com.alibaba.druid.util.JdbcUtils.createDriver(JdbcUtils.java:623)
		... 67 more
17-Feb-2020 14:59:44.178 信息 [RMI TCP Connection(5)-127.0.0.1] org.apache.catalina.core.ApplicationContext.log Closing Spring root WebApplicationContext

第二次回复

  • 直接访问正常
    直接访问正常

  • 添加test/hello目录后500
    添加test/hello目录后500

  • 下面是ApplicationContext.xml
    图片描述
    图片描述
猪小屁 2020-02-15 19:55:47
源自：5-4  Spring MVC开发环境搭建-applicationContext.xml配置
826
收起

正在回答

1回答

Jimin 2020-02-15 22:12:35

你好，404是请求的链接找不到，很大可能是由于不同的部署方式导致的。如果你是打好一个war包放在tomcat下直接启动tomcat，那么访问时在端口和请求间需要额外加上一层解压包的名。你看看你是否是这个情况

0 回复 有任何疑惑可以回复我~
收起回答
  • 提问者 猪小屁 #1 
    已经加上了，还是不能访问，图已经补充
查了这些都不能解决
https://blog.csdn.net/u011099093/article/details/87913919
https://blog.csdn.net/weixin_38204290/article/details/100513741
    回复 有任何疑惑可以回复我~ 2020-02-16 16:55:55
  • 提问者 猪小屁 #2 
    解决了404问题，是数据库的com.mysql.jdbc.Driver写成了com.mysql.cj.jdbc.Driver
但是访问test/hello的时候还是有500的问题，图片在上面，麻烦老师看下
    回复 有任何疑惑可以回复我~ 2020-02-17 16:26:31
  • 提问者 猪小屁 #3 
    线下解决
    回复 有任何疑惑可以回复我~ 2020-02-17 17:40:52
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