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阅读本文需要又一定的sping基础，最起码要成功的运行过一个SpringMvc项目。
在传统的Spring项目中，我们要写一堆的XML文件。而这些XML文件格式要求又很严格，很不便于开发。而网上所谓的0配置，并不是纯粹的0配置，还是要写一些xml配置，只是用了几个@Service，@Controller注解而已。
在这里，我讲介绍一种新的配置方式，一行XML代码都不需要，什么web.xml,Application-context.xml，Beans.xml，统统去死吧！
首先建立一个Maven项目，Packageing方式为war，项目结构为标准Maven WebApp结构。
pom文件如下（很多依赖都没用，懒得去掉了）：
<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.csonezp</groupId>
<artifactId>springdemo</artifactId>
<packaging>war</packaging>
<version>1.0-SNAPSHOT</version>
<name>dataplatform Maven Webapp</name>
<url>http://maven.apache.org</url>
<properties>
<spring.version>4.0.1.RELEASE</spring.version>
</properties>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
</dependency>
<!-- Spring dependencies -->
<dependency>
<groupId>asm</groupId>
<artifactId>asm-commons</artifactId>
<version>2.2.3</version>
</dependency>
<dependency>
<groupId>asm</groupId>
<artifactId>asm</artifactId>
<version>2.2.3</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aop</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-expression</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>cglib</groupId>
<artifactId>cglib</artifactId>
<version>2.2.2</version>
</dependency>
<!-- Servlet API, JSTL -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.0.1</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>jstl</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<dependency>
<groupId>org.codehaus.jackson</groupId>
<artifactId>jackson-core-asl</artifactId>
<version>1.8.4</version>
</dependency>
<dependency>
<groupId>org.codehaus.jackson</groupId>
<artifactId>jackson-mapper-asl</artifactId>
<version>1.8.4</version>
</dependency>
<dependency>
<groupId>c3p0</groupId>
<artifactId>c3p0</artifactId>
<version>0.9.1.2</version>
</dependency>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.8</version>
</dependency>
<dependency>
<groupId>org.json</groupId>
<artifactId>json</artifactId>
<version>20090211</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.6</version>
</dependency>
<dependency>
<groupId>spy</groupId>
<artifactId>spymemcached</artifactId>
<version>2.6</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.6.6</version>
</dependency>
</dependencies>
<build>
<finalName>dataplatform</finalName>
</build>
</project>
</div>
这个时候，就该进行Spring配置了。按传统方式来的话，首先要去web.xml写一堆配置，然后建立个管理beab的Beans.xml，管理spring mvc 的xml，再写一坨一坨Bean。就是先进一点的（也就是很多人说的0配置），也就是自己的业务Bean不用写进xml了，还是很麻烦。
而我这里讲的方式，则是完全不修改任何web.xml代码，不写一行XML代码的方式。
首先，在项目立建立一个Config.java文件：
/**
* Created by zhangpeng on 16-3-22.
* 取代Beans.xml，纯注解配置各种BEAN
*/
@Configuration
@ComponentScan("com.csonezp")
@EnableWebMvc
public class Config {
/**
* jsp视图解析器的bean
* @return
*/
@Bean
public UrlBasedViewResolver setupViewResolver() {
UrlBasedViewResolver resolver = new UrlBasedViewResolver();
resolver.setPrefix("/WEB-INF/");
resolver.setSuffix(".jsp");
resolver.setViewClass(JstlView.class);
return resolver;
}
/**
* 配置数据源
* @return
*/
@Bean(name = "dataSource")
public ComboPooledDataSource getDataSource() {
try {
ComboPooledDataSource dataSource = new ComboPooledDataSource();
dataSource.setJdbcUrl("jdbc:mysql://localhost:3306/mfdb");
dataSource.setDriverClass("com.mysql.jdbc.Driver");
dataSource.setUser("root");
dataSource.setPassword("zp1228");
dataSource.setMaxPoolSize(75);
return dataSource;
} catch (Exception e) {
return null;
}
}
}
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