配置maven

下载settings.xml

<?xml version="1.0" encoding="UTF-8"?>

<settings xmlns="http://maven.apache.org/SETTINGS/1.0.0"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0 http://maven.apache.org/xsd/settings-1.0.0.xsd">

    <localRepository>E:/maven</localRepository>
    <pluginGroups>
    </pluginGroups>

    <proxies>
    </proxies>

    <servers>
    </servers>

    <mirrors>
        <mirror>
            <id>nexus</id>
            <name>Tedu Maven</name>
            <mirrorOf>*</mirrorOf>
            <url>http://maven.aliyun.com/nexus/content/groups/public</url>
            <!-- <url>http://maven.aliyun.com/content/groups/public</url> -->
        </mirror>
    </mirrors>
    <profiles>

    </profiles>
    <activeProfiles>
    </activeProfiles>



</settings>

注意镜像地址http://maven.aliyun.com/nexus/content/groups/public
配置eclipse
eclipse-window-preference-maven-usersettings
Global Settings设置setting.xml文件路径

在阿里云查找需要的包我们此处用到commons-code

新建Maven项目复制上图右侧xml文档添加到pom.xml里放到<dependencies>标签里

自动安装需要的jar包成功

maven可能下载失败关闭eclipse删除包右击项目maven updateProject 勾选force update 强制更新变可成功

摘要：用于检验完整性的技术

数据一样摘要一定一样，摘要一样数据一定一样

测试：
通过刚才导入的commons-code包里的DigestUtils方法查看其摘要可以进行判断是否下载成功是否完整等

迅雷就是通过摘要自动比较，如果摘要（md5）不同自动提示下载失败重新下载

配置Spring

搜索spring-webmvc 找到3.2.8版本复制xml文档添加到pom.xml文档里

spring-service.xml文件如下配置到src/main/resources文件夹下

<?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:context="http://www.springframework.org/schema/context" 
    xmlns:jdbc="http://www.springframework.org/schema/jdbc"  
    xmlns:jee="http://www.springframework.org/schema/jee" 
    xmlns:tx="http://www.springframework.org/schema/tx"
    xmlns:aop="http://www.springframework.org/schema/aop" 
    xmlns:mvc="http://www.springframework.org/schema/mvc"
    xmlns:util="http://www.springframework.org/schema/util"
    xmlns:jpa="http://www.springframework.org/schema/data/jpa"
    xsi:schemaLocation="
        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsd
        http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-3.2.xsd
        http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-3.2.xsd
        http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.2.xsd
        http://www.springframework.org/schema/data/jpa http://www.springframework.org/schema/data/jpa/spring-jpa-1.3.xsd
        http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.2.xsd
        http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd
        http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.2.xsd">
    

    
</beans>

在spring-service.xml里添加组件可以通过spring容器直接获取
<bean id="date" class="java.util.Date"></bean>

考虑到数量的问题可以通过组件扫描方法更方便不用一个个添加
在spring-service.xml文档里添加<context:component-scan base-package="com.example"></context:component-scan>
自动扫描有@Component注释的包自动创建bean组件

如果有@Autowired注释会将该对象直接注入到变量中

新建servlet 选择已存在的servlet

url mappings设置为*.do

更改web.xml信息设置servlet的init-param

<servlet>
    <description></description>
    <display-name>DispatcherServlet</display-name>
    <servlet-name>DispatcherServlet</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <init-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:spring-service.xml</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
    <servlet-name>DispatcherServlet</servlet-name>
    <url-pattern>*.do</url-pattern>
  </servlet-mapping>

重启查看后台信息显示初始化完成

在spring-service.xml里添加如下

    <!-- 启动注解版本的Spring MVC -->
    <mvc:annotation-driven></mvc:annotation-driven>
    <context:component-scan base-package="com.sdu.wh"></context:component-scan>

新建DemoController类
此时用到注解@RequestMapping("/xxx")映射类路径方法路径简单的注解就可以实现功能

package com.sdu.wh;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

@Controller //自动的在Spring容器中创建Bean对象，Bean ID demoController 与Component完全一样 
//语义上Controller更符合
@RequestMapping("/test")//映射URL路径 /demo
public class DemoController {
    
    @RequestMapping("/hello")//映射URL路径 /hello 映射的完整路径：http://localhost:8080/Spring1/test/hello.do
    @ResponseBody //自动处理返回值，将字符串送到浏览器 
    public String hello(){
        return "HelloWorld";
    }
}