springMVC4 注解配置实例

结构：



maven配置：

<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>java-springmvc-demo6</groupId>
<artifactId>java-springmvc-demo6</artifactId>
<packaging>war</packaging>
<version>1.0-SNAPSHOT</version>
<name>java-springmvc-demo6 Maven Webapp</name>
<url>http://maven.apache.org</url>

<!--项目依赖 -->
<dependencies>
<!--日志包-->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>1.7.21</version>
</dependency>

<!--j2ee相关包 servlet、jsp、jstl-->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.1.0</version>
</dependency>
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>jsp-api</artifactId>
<version>2.2</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>

<!--spring相关包-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>4.3.1.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>4.3.1.RELEASE</version>
</dependency>

<!--其他需要的包-->
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
<version>3.4</version>
</dependency>
<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>1.3.1</version>
</dependency>
</dependencies>

<build>
<finalName>maven-springmvc</finalName>
<resources>
<!--表示把java目录下的有关xml文件,properties文件编译/打包的时候放在resource目录下-->
<resource>
<directory>${basedir}/src/main/java</directory>
<includes>
<include>**/*.properties</include>
<include>**/*.xml</include>
</includes>
</resource>
<resource>
<directory>${basedir}/src/main/resources</directory>
</resource>
</resources>

<plugins>
<!--servlet容器 jetty插件-->
<plugin>
<groupId>org.eclipse.jetty</groupId>
<artifactId>jetty-maven-plugin</artifactId>
<version>9.3.10.v20160621</version>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.6</source>
<target>1.6</target>
</configuration>
</plugin>
</plugins>
</build>
</project>

web.xml：

<?xml version="1.0" encoding="UTF-8"?>
<web-app id="WebApp_ID" version="2.5"
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_2_5.xsd"> <display-name>java-springmvc-demo5</display-name>

<servlet>
<servlet-name>SpringMVC</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>

<!-- 默认的servlet.xml文件是放在WEB-INF目录下，名称与<servlet-name>的名字要相关。但可以通过以下设置重新自定义servlet.xml配置文件的位置和名称。-->
<!--<init-param>-->
<!--<param-name>contextConfigLocation</param-name>-->
<!--<param-value>/WEB-INF/SpringMVC-servlet.xml</param-value>-->
<!--</init-param>-->

<load-on-startup>1</load-on-startup>
</servlet>

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

<!--欢迎页面-->
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
</web-app>

SpringMVC-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:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd">

<!-- 默认扫描的包路径 -->
<context:component-scan base-package="com.example.controller" />
<!-- 添加注解驱动 -->
<mvc:annotation-driven />
<!--所有的访问都统一先由InternalResourceViewResolver类处理-->
<bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<!--定义跳转的文件的前缀（jsp文件所在目录）-->
<property name="prefix" value="/" />
<!-- 定义跳转的文件的后缀 -->
<property name="suffix" value=".jsp" />
</bean>
</beans>

HelloController.java：

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

@Controller//该注解用来识别控制器
@RequestMapping("hello")//该注解用来控制url书写时，控制器的选择
public class HelloController{
@RequestMapping("helloworld")//该注解用来控制url书写时，具体方法的选择（还可以绑定参数等）
public String helloworld() {
return "hello_world";//跳转到jsp页面
}

}

之后通过“http://localhost:8080/hello/helloworld”可访问到hello_world.jsp页面