有一次在做项目的时候,我把spring-framework-4.2.3.RELEASE下libs文件下的所有jar包都丢进去了,后来浩哥看了说着怎么行?
今天整理一下一个用springMVC写得helloworld需要依赖哪些包
我们配置一个springMVC的时候
将请求交给spring的DispatcherServlet处理
代码如下
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
<display-name>springmvctest</display-name>
<!-- 统一编码 -->
<filter>
<filter-name>charsetEncoding</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>UTF-8</param-value>
</init-param>
<init-param>
<param-name>forceEncoding</param-name>
<param-value>true</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>charsetEncoding</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<!-- 前端控制器 -->
<servlet>
<servlet-name>springmvc</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<!-- 加载/WEB-INF/[servlet-name]-servlet.xml -->
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>springmvc</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p" xmlns:context="http://www.springframework.org/schema/context" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:task="http://www.springframework.org/schema/task" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.2.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.2.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.2.xsd http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task-4.2.xsd">
<!-- 扫描路径 -->
<context:component-scan base-package="com.test.controller" >
<context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
</context:component-scan>
<!-- 配置根视图 -->
<mvc:view-controller path="/" view-name="index"/>
<!-- 激活基于注解的配置 @RequestMapping, @ExceptionHandler,数据绑定 ,@NumberFormat , @DateTimeFormat ,@Controller ,@Valid ,@RequestBody ,@ResponseBody等 -->
<mvc:annotation-driven />
<!-- 静态资源配置 -->
<mvc:resources location="/assets/" mapping="/assets/**"></mvc:resources>
<!-- 视图层配置 -->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/pages/"/>
<property name="suffix" value=".jsp"/>
</bean>
</beans>
根据DispatcherServlet的完整路径来看,我们需要加入
spring-web-4.x.x.RELEASE.jar
错误如下:
java.lang.NoClassDefFoundError: org/springframework/beans/factory/BeanNameAware
根据错误加入
spring-beans-4.x.x.RELEASE.jar
接着报错
java.lang.NoClassDefFoundError: org/springframework/context/EnvironmentAware
继续加入
spring-context-4.x.x.RELEASE.jar
接着报错
java.lang.NoClassDefFoundError: org/springframework/core/env/Environment
继续加人
spring-core-4.x.x.RELEASE.jar
接着报错
org/apache/commons/logging/LogFactory
继续加入
commons-logging-1.1.3.jar
接着报错
java.lang.ClassNotFoundException: org.springframework.web.servlet.DispatcherServlet
嗯?这个错是说找不到DispatcherServlet吗,可是在刚开始都已经将
spring-web-4.x.x.RELEASE.jar
加入了吗?
原来DispatcherServlet虽然前缀是org.springframework.web.servlet可是它并不在spring-web-4.x.x.RELEASE.jar中
它在
spring-webmvc-4.x.x.RELEASE.jar
中,好,将其加入
接着报错
java.lang.NoClassDefFoundError: org/springframework/aop/TargetSource
引入
spring-aop-4.x.x.RELEASE.jar
接着报错
java.lang.NoClassDefFoundError: org/springframework/expression/ParserContext
引入
spring-expression-4.x.x.RELEASE.jar
到这里已经不报错了
写一个helloworld
package com.test.controller;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
@Controller
@RequestMapping(value="/hello")
public class HelloController {
@RequestMapping(value="/world",method=RequestMethod.GET)
public String hello(Model model){
model.addAttribute("msg", "你好spring mvc");
return "index";
}
}
<%@ 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>
<h1>Hello Spring</h1>
${msg }
</body>
</html>
好了打开浏览器访问
http://localhost:8080/springmvctest/hello/world.html
一个简单的helloworld完成
最后的最后贴上项目结构和jar包的结构还有下载jar包的地址
我的Dynamic Web Module 是3.0的
项目结构
jar包下载地址
推荐使用Maven中央仓库,当然这个项目也可以建成一个maven项目
Maven中央仓库地址
http://mvnrepository.com/