创建工程

• 本案例工程使用maven进行构建，使用SpringMVC,Servlet3.0实现。

创建maven工程

• 创建maven工程security-springmvc，工程结构如下：

  
  
  image
• 引入如下依赖，注意：
  • 由于是web工程，packaging设置为war
  • 使用tomcat7-maven-plugin插件来运行工程

<?xml version="1.0" encoding="UTF-8"?>
<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/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.stan.security</groupId>
    <artifactId>security-springmvc</artifactId>
    <version>1.0-SNAPSHOT</version>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
    </properties>
    <packaging>war</packaging>

    <dependencies>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>5.1.5.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>3.0.1</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.18.8</version>
        </dependency>
    </dependencies>

    <build>
        <finalName>security-springmvc</finalName>
        <pluginManagement>
            <plugins>
                <plugin>
                    <groupId>org.apache.tomcat.maven</groupId>
                    <artifactId>tomcat7-maven-plugin</artifactId>
                    <version>2.2</version>
                </plugin>
                <plugin>
                    <groupId>org.apache.maven.plugins</groupId>
                    <artifactId>maven-compiler-plugin</artifactId>
                    <configuration>
                        <source>1.8</source>
                        <target>1.8</target>
                    </configuration>
                </plugin>
                <plugin>
                    <artifactId>maven-resources-plugin</artifactId>
                    <configuration>
                        <encoding>utf-8</encoding>
                        <useDefaultDelimiters>true</useDefaultDelimiters>
                        <resources>
                            <resource>
                                <directory>src/main/resources</directory>
                                <filtering>true</filtering>
                                <includes>
                                    <include>**/*</include>
                                </includes>
                            </resource>
                            <resource>
                                <directory>src/main/java</directory>
                                <includes>
                                    <include>**/*.xml</include>
                                </includes>
                            </resource>
                        </resources>
                    </configuration>
                </plugin>
            </plugins>
        </pluginManagement>
    </build>
</project>

Spring容器配置

• 在config包下定义ApplicationConfig.java，它对应web.xml中ContextLoaderListener的配置

@Configuration
@ComponentScan(value = "com.security.springmvc"
        ,excludeFilters = {@ComponentScan.Filter(type = FilterType.ANNOTATION,value = Controller.class)})
public class ApplicationConfig {
    //在此配置除了Controller的其它的bean，比如：数据库连接池，事务管理器，业务bean等
}

ServletContext配置

• 本案例采用Servlet3.0无web.xml方式，的config包下定义WebConfig.java，它对应DispatchServlet配置。

@Configuration
@EnableWebMvc
@ComponentScan(basePackages = "com.security.springmvc"
        ,includeFilters = {@ComponentScan.Filter(type = FilterType.ANNOTATION,value = Controller.class)})
/**
 * 相当于springmvc.xml文件
 */
public class WebConfig implements WebMvcConfigurer {
    //视图解析器
    @Bean
    public InternalResourceViewResolver viewResolver(){
        InternalResourceViewResolver viewResolver = new InternalResourceViewResolver();
        viewResolver.setPrefix("/WEB-INF/view/");
        viewResolver.setSuffix(".jsp");
        return viewResolver;
    }
}

加载Spring容器

• 在inti包下定义Spring容器初始化类SpringApplicationInitializer，此类实现WebApplicationInitializer接口，Spring容器启动时加载WebApplicationInitializer接口的所有实现类。

public class SpringApplicationInitializer extends AbstractAnnotationConfigDispatcherServletInitializer {
    /**
     * spring容器，相等于加载了applicationContext.xml
     * @return
     */
    @Override
    protected Class<?>[] getRootConfigClasses() {
        return new Class[]{ApplicationConfig.class};
    }

    /**
     * servletContext，相当于加载springmvc.xml
     * @return
     */
    @Override
    protected Class<?>[] getServletConfigClasses() {
        return new Class[]{WebConfig.class};
    }

    /**
     * url-mapping
     * @return
     */
    @Override
    protected String[] getServletMappings() {
        return new String[]{"/"};
    }
}