Java 示例SpringMVC应用程序中存在什么问题_Java_Spring

Java 示例SpringMVC应用程序中存在什么问题

java spring

Java 示例SpringMVC应用程序中存在什么问题,java,spring,Java,Spring,我对SpringMVC比较熟悉，我开发了一个示例helloworld应用程序，但在将一个jsp页面导航到另一个jsp页面时出错 **maven项目创建时提供的信息 **项目文件夹结构 web.xml <web-app xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com

我对SpringMVC比较熟悉，我开发了一个示例helloworld应用程序，但在将一个jsp页面导航到另一个jsp页面时出错

**maven项目创建时提供的信息

**项目文件夹结构

web.xml

<web-app xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
 http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
 version="3.0">
 <display-name>Archetype Created Web Application</display-name>
 <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
 </welcome-file-list>
 <servlet>
    <servlet-name>practice1</servlet-name>
     <servlet-class>
        org.springframework.web.servlet.DispatcherServlet
     </servlet-class>
     <load-on-startup>1</load-on-startup>
 </servlet>

 <servlet-mapping>
    <servlet-name>practice1</servlet-name>
    <url-pattern>/</url-pattern>
 </servlet-mapping>

pom.xml

<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/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.spring.practice1</groupId>
<artifactId>parctice1</artifactId>
<packaging>war</packaging>
<version>0.0.1-SNAPSHOT</version>
<name>practice1 Maven Webapp</name>
<url>http://maven.apache.org</url>
<dependencies>
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>${junit.version}</version>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>javax.servlet-api</artifactId>
        <version>${javax.version}</version>
    </dependency>

    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-core</artifactId>
        <version>${spring.version}</version>
    </dependency>

    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-webmvc</artifactId>
        <version>${spring.version}</version>
    </dependency>

    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>${mysql.version}</version>
    </dependency>

</dependencies>

<build>
    <finalName>practice1</finalName>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>3.1</version>
            <configuration>
                <source>${jdk.version}</source>
                <target>${jdk.version}</target>
            </configuration>
        </plugin>
    </plugins>
</build>

<properties>
    <spring.version>5.2.3.RELEASE</spring.version>
    <mysql.version>5.1.36</mysql.version>
    <javax.version>3.1.0</javax.version>
    <junit.version>3.8.1</junit.version>
    <jdk.version>1.8</jdk.version>
</properties>


4.0.0
com.spring.practice1

hello.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
   <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
   <title>Hello</title>
</head>
<body>${message}
</body>


你好
${message}

每当点击索引页面的超链接导航到hello页面时，就会出现以下错误。

eclipse控制台日志如下所示

信息：服务器启动时间为[10576]毫秒 2020年1月26日11:12:02 PM org.springframework.web.servlet.DispatcherServlet noHandlerFound

警告：GET/practice1/helloworld没有映射。您需要在链接的上下文路径前面加上前缀

<c:set var="contextPath" value="${pageContext.request.contextPath}"/>

...
<a href="${contextPath}/helloworld">Click here to read hello message</a>

...

更新项目文件夹结构及其工作的类路径后，请查找。

<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
  <head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <title>HelloWorld</title>
  </head>
 <body>
   <a href="helloworld">Click here to read hello message </a>
 </body>

<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
   <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
   <title>Hello</title>
</head>
<body>${message}
</body>

<c:set var="contextPath" value="${pageContext.request.contextPath}"/>

...
<a href="${contextPath}/helloworld">Click here to read hello message</a>