SpringMVC入门案例出现网页404错误的问题源服务器未能找到目标资源的表示或者是不愿公开一个已经存在的资源表示。

mac2026-09-03 5

SpringMVC入门案例出现网页404错误的问题

代码部署

目的：Tomcat服务器实现通过控制类(HelloController)来进行一个页面(index.jsp)向另一个页面(success.jsp)跳转项目的目录：

代码

Hellocontroller

package cn.itcast.controller; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; /** * 控制器类 */ @Controller @RequestMapping(path = "/T") public class HelloController { @RequestMapping(path = "/hello") public String sayHello() { System.out.println("Hello SpringMVC"); return "success"; } @RequestMapping(path = "/RM") public String textRequestMapping() { System.out.println("textRequestMapping()方法执行中......"); return "RMtest"; } }

springmvc.xml

<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:context="http://www.springframework.org/schema/context" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">  <context:component-scan base-package="cn.itcast"/>  <bean id="internalResourceViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/WEB-INF/pages/"/> <property name="suffix" value=".jsp"/> </bean>  <mvc:annotation-driven/> </beans>

success.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <head> <title>Title</title> </head> <body> <h3>入门成功</h3> </body> </html>

web.xml

<!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" "http://java.sun.com/dtd/web-app_2_3.dtd" > <web-app> <display-name>Archetype Created Web Application</display-name> <servlet> <servlet-name>dispatcherServlet</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:springmvc.xml</param-value> </init-param>  <load-on-startup>1</load-on-startup>  </servlet> <servlet-mapping> <servlet-name>dispatcherServlet</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> </web-app>

index.xml

<%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <head> <title>Title</title> </head> <body> <h3>入门程序</h3> <a href="T/hello">入门程序</a> <br/> <a href="T/RM">textRequestMapping() Test</a> </body> </html>

pom.xml

<?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>cn.itcast</groupId> <artifactId>springmvc_day01_01_start</artifactId> <version>1.0-SNAPSHOT</version> <packaging>war</packaging> <name>springmvc_day01_01_start Maven Webapp</name>  <url>http://www.example.com</url> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <maven.compiler.source>1.8</maven.compiler.source> <maven.compiler.target>1.8</maven.compiler.target> <spring.version>5.0.2.RELEASE</spring.version> </properties> <dependencies> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.11</version> <scope>test</scope> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-web</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>javax.servlet</groupId> <artifactId>servlet-api</artifactId> <version>2.5</version> <scope>provided</scope> </dependency> <dependency> <groupId>javax.servlet.jsp</groupId> <artifactId>jsp-api</artifactId> <version>2.0</version> <scope>provided</scope> </dependency> </dependencies> <build> <finalName>springmvc_day01_01_start</finalName> <pluginManagement> <plugins> <plugin> <artifactId>maven-clean-plugin</artifactId> <version>3.1.0</version> </plugin>  <plugin> <artifactId>maven-resources-plugin</artifactId> <version>3.0.2</version> </plugin> <plugin> <artifactId>maven-compiler-plugin</artifactId> <version>3.8.0</version> </plugin> <plugin> <artifactId>maven-surefire-plugin</artifactId> <version>2.22.1</version> </plugin> <plugin> <artifactId>maven-war-plugin</artifactId> <version>3.2.2</version> </plugin> <plugin> <artifactId>maven-install-plugin</artifactId> <version>2.5.2</version> </plugin> <plugin> <artifactId>maven-deploy-plugin</artifactId> <version>2.8.2</version> </plugin> </plugins> </pluginManagement> </build> </project>

以上完整代码成功部署在Tomcat，运行后出现以下问题要注意的是index.jsp页面不能写在WEB-INF目录下，否则无法加载出来会找不到资源接着出现了以上问题，这里要注意的是你的Hellocontroller类返回字符串会通过视图解析器拼接成“返回字符串”+“.jsp”页面，返回字符串与页面名一致此处href不能写成 “/T/hello” 否者也会报错，而应该把T前面的“/”给去掉：

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SpringMVC入门案例出现网页404错误的问题 源服务器未能找到目标资源的表示或者是不愿公开一个已经存在的资源表示。