SpringMvc 以配置类的形式代替xml文件

news2024/9/20 16:52:47

1、配置类

1.1、创建Mvc 项目之后创建 MyWebApplicationInitializer 类

实现接口 WebApplicationInitializer

public class MyWebApplicationInitializer implements WebApplicationInitializer {
    @Override
    public void onStartup(ServletContext servletContext) throws ServletException {
        //关联AppConfig配置类
        AnnotationConfigWebApplicationContext context =
                new AnnotationConfigWebApplicationContext();
        context.register(AppConfig.class);
        //前端控制器
        DispatcherServlet dispatcherServlet = new DispatcherServlet(context);
        //添加前端控制器到web容器
        ServletRegistration.Dynamic dynamic =
                servletContext.addServlet("springmvc", dispatcherServlet);
        //设置该servlet启动时机 （web容器启动时，实列化servlet）
        dynamic.setLoadOnStartup(1);
        //设置servlet的匹配路径
        dynamic.addMapping("/");

        //添加编码过滤器
        servletContext.addFilter("encodingFilter",new CharacterEncodingFilter("UTF-8"));
    }

}

1.2、创建 AppConfig 类

@Configuration
@ComponentScan("com.cxd")
public class AppConfig {
    @Bean
    public ViewResolver viewResolver() {
        InternalResourceViewResolver viewResolver =
                new InternalResourceViewResolver();
        viewResolver.setPrefix("/WEB-INF/views/");
        viewResolver.setSuffix(".jsp");
        return viewResolver;
    }
}

这样就可以访问页面了

2、用到的jar包

 <dependencies>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</artifactId>
      <version>6.1.11</version>
    </dependency>

    <dependency>
      <groupId>jakarta.servlet</groupId>
      <artifactId>jakarta.servlet-api</artifactId>
      <version>6.0.0</version>
    </dependency>

    <dependency>
      <groupId>org.projectlombok</groupId>
      <artifactId>lombok</artifactId>
      <version>1.18.34</version>
    </dependency>

  </dependencies>