在上一章中采用了最简单的创建service端代码方式,但在实际开发中一般都会采用比较成熟的框架,下面是完整的maven+spring mvc 创建service的方式
下载安装Eclipse 和jdk
这里需要注意一下eclipse jdk选择版本的位数要一直,不能一个是32位一个是64位,不一致会造成后面使用时有错误
下载完毕以后需要配置jdk的环境变量 jdk7配置 jdk10配置;
下载安装Maven并配置环境变量
按照完毕以后我们需要配置用户范围setting.xml
安装目录/conf/setting.xml是全局的设置,这个电脑上所有的用户都会受影响,所以将安装目录/conf/setting.xml复制一份,到上面配置仓库位置中,默认不设置路径在c:/用户/用户名/.m2下
高版本的Eclipse默认带有maven的插件,如果没有的我们可以自己下载
http://m2eclipse.sonatype.org/sites/m2e
配置Eclipse
在Window——Preferences——Maven
installations勾掉默认的maven,add安装的maven目录
user Settings中选择本地仓库配置的setting.xml,如我的E:\m2\settings.xml
用Maven来构建工程
在Eclipse中选择新建Maven project,选择工作环境
1、选择要创建的filter如下:
2、填写maven项目坐标信息
这里的Group Id就是大项目的id,Arifact Id就是该项目的Id。就像一个大项目中有许多小项目组成一样
我们生成的项目结构如下
完善项目
首先,完善目录,增加重要的source Folder,这个在下面config build path会用到。需要增加
增加src/main/resources,src/test/resources目录。让目录变成标准的maven结构。
把项目转换成web工程
选择项目属性,如下图添加Web Module
添加src/main/webapp路径,把下面选项也选上。完成以后点击ok
在点击Apply
然后再右击项目熟悉
去掉多余项,把刚才新建的目录加进去
如下图
最后完整的项目工程如下
xml配置文件
pom.xml 内容如下
<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>MavenTest</groupId> <artifactId>tan.maven.springmvc</artifactId> <packaging>war</packaging> <version>0.0.1-SNAPSHOT</version> <name>tan.maven.springmvc Maven Webapp</name> <url>http://maven.apache.org</url> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <springversion>3.1.1.RELEASE</springversion> <junitversion>3.8.1</junitversion> </properties> <dependencies> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>${junitversion}</version> <scope>test</scope> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-aop</artifactId> <version>${springversion}</version> <type>jar</type> <scope>compile</scope> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-asm</artifactId> <version>${springversion}</version> <type>jar</type> <scope>compile</scope> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-aspects</artifactId> <version>${springversion}</version> <type>jar</type> <scope>compile</scope> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-beans</artifactId> <version>${springversion}</version> <type>jar</type> <scope>compile</scope> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>${springversion}</version> <type>jar</type> <scope>compile</scope> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context-support</artifactId> <version>${springversion}</version> <type>jar</type> <scope>compile</scope> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> <version>${springversion}</version> <type>jar</type> <scope>compile</scope> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-expression</artifactId> <version>${springversion}</version> <type>jar</type> <scope>compile</scope> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>${springversion}</version> <type>jar</type> <scope>compile</scope> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jms</artifactId> <version>${springversion}</version> <type>jar</type> <scope>compile</scope> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-orm</artifactId> <version>${springversion}</version> <type>jar</type> <scope>compile</scope> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-oxm</artifactId> <version>${springversion}</version> <type>jar</type> <scope>compile</scope> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-tx</artifactId> <version>${springversion}</version> <type>jar</type> <scope>compile</scope> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-web</artifactId> <version>${springversion}</version> <type>jar</type> <scope>compile</scope> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>${springversion}</version> <type>jar</type> <scope>compile</scope> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-test</artifactId> <version>${springversion}</version> <type>jar</type> <scope>compile</scope> </dependency> <dependency> <groupId>javax.servlet</groupId> <artifactId>jstl</artifactId> <version>1.2</version> <type>jar</type> <scope>compile</scope> </dependency> <dependency> <groupId>commons-collections</groupId> <artifactId>commons-collections</artifactId> <version>3.1</version> </dependency> <dependency> <groupId>commons-logging</groupId> <artifactId>commons-logging</artifactId> <version>1.1</version> </dependency> </dependencies> <build> <finalName>tan-springmvc-book</finalName> </build></project>
web.xml 位于WEB-INF路径下
<?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" xmlns:web="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" version="3.0"> <display-name>Archetype Created Web Application</display-name> <servlet> <!-- spring MVC的核心就是DispatcherServlet,使用springMVC的第一步就是将下面的servlet放入web.xml servlet-name属性非常重要,默认情况下,DispatchServlet会加载这个名字-servlet.xml的文件,如下,就会加载 dispather-servlet.xml,也是在WEN-INF目录下。 也可以直接指定具体文件 <servlet> <servlet-name>book</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param> <param-name>contextConfigLocation</param-name> <param-value>/WEB-INF/applicationContext.xml</param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet> --> <servlet-name>dispatcher</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>dispatcher</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> <filter> <filter-name>encodingFilter</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>encodingFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <display-name>mvc</display-name> <welcome-file-list> <welcome-file>index.html</welcome-file> <welcome-file>index.htm</welcome-file> <welcome-file>index.jsp</welcome-file> <welcome-file>default.html</welcome-file> <welcome-file>default.htm</welcome-file> <welcome-file>default.jsp</welcome-file> </welcome-file-list></web-app>
dispatcher-servlet.xml
<?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:mvc="http://www.springframework.org/schema/mvc" xmlns:p="http://www.springframework.org/schema/p" 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" default-lazy-init="true"> <!-- 通过mvc:resources设置静态资源,这样servlet就会处理这些静态资源,而不通过控制器 --> <!-- 设置不过滤内容,比如:css,jquery,img 等资源文件 --> <mvc:resources location="/*.html" mapping="/**.html" /> <mvc:resources location="/css/*" mapping="/css/**" /> <mvc:resources location="/js/*" mapping="/js/**" /> <mvc:resources location="/images/*" mapping="/images/**" /> <!-- 添加注解驱动 --> <mvc:annotation-driven /> <!-- 默认扫描的包路径 --> <context:component-scan base-package="exam_1" /> <!-- mvc:view-controller可以在不需要Controller处理request的情况,转向到设置的View --> <!-- 像下面这样设置,如果请求为/,则不通过controller,而直接解析为/index.jsp --> <mvc:view-controller path="/" view-name="index" /> <bean class="org.springframework.web.servlet.view.UrlBasedViewResolver"> <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"></property> <!-- 配置jsp路径前缀 --> <property name="prefix" value="/"></property> <!-- 配置URl后缀 --> <property name="suffix" value=".jsp"></property> </bean> </beans>
在
创建java类 MyController
package mvc;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestParam;import org.springframework.web.bind.annotation.ResponseBody;@Controller public class MyController { @RequestMapping("login") //用来处理前台的login请求 private @ResponseBody String hello( @RequestParam(value = "username", required = false)String username, @RequestParam(value = "password", required = false)String password ){ return "Hello "+username+",Your password is: "+password; } }
到此代码编写完毕
项目运行
很多bolg文章到这里就结束了,是因为那些人他们的weorkspace内已经开发过了项目。如果刚下载的还需要2部
第一步右击项目Run As- > maven install 装载需要的类库
第二部 tomact属性设置
Run As->Run On Server 选择你的tomact并把项目加进去,如果运行没有错误会出现404错误
解决方法如下:
右击选择Add and Reomve,然后双击弹出以下页面
重新配置以下二项
然后再运行项目就OK了
原因这个说的比较明白
项目源码地址