SpringMvc学习笔记五

Restful 风格路由

1. 配置类

   1.1、SpringMvcConfig配置类

@Configuration
@ComponentScan({"com.itheima.controller", "com.itheima.config"})   方式1.2 添加com.itheima.config 扫描目录
@EnableWebMvc
public class SpringMvcConfig {
}

  1.2、ServletContainerInitConfig类

public class ServletContainersInitConfig extends AbstractAnnotationConfigDispatcherServletInitializer {@Overrideprotected Class<?>[] getRootConfigClasses() {return new Class[0];}@Overrideprotected Class<?>[] getServletConfigClasses() {return new Class[]{SpringMvcConfig.class};}@Overrideprotected String[] getServletMappings() {return new String[]{"/"};}// 乱码处理 过滤器@Overrideprotected Filter[] getServletFilters() {CharacterEncodingFilter filter = new CharacterEncodingFilter();filter.setEncoding("UTF-8");return new Filter[]{filter};}
}

 1.3、SpringMvcSupport配置类

@Configuration  //方式1.1 添加Configuration注解
public class SpringMvcSupport extends WebMvcConfigurationSupport {@Overrideprotected void addResourceHandlers(ResourceHandlerRegistry registry) {// 当访问 /pages的时候 ，走pages目录下访问 不要走mvcregistry.addResourceHandler("/pages/**").addResourceLocations("/pages/");}
}

• 这个类的主要作用 添加静态资源排除，让这些路径 不会进入SpringMvc动态请求里面

2.  控制器

 2.1、 Restful 风格 增删改查

@RestController
@RequestMapping("/books")
public class BookController {@PostMappingpublic String save(@RequestBody Book book){System.out.println("book save ==>" + book);return "{'module':'book save success'}";}@GetMappingpublic List<Book> getAll(){Book book1 = new Book();book1.setType("计算机");book1.setName("SpringMVC入门教程");book1.setDescription("小试牛刀");Book book2 = new Book();book2.setType("计算机");book2.setName("SpringMVC项目实战");book2.setDescription("一代总是");List<Book> bookList = new ArrayList<>();bookList.add(book1);bookList.add(book2);return bookList;}@DeleteMapping("/{id}")public String delete(@PathVariable Integer id){System.out.println("book delete id = "+ id);return "{'module':'book delete success'}";}@PutMappingpublic String update(@RequestBody Book book){System.out.println("book update book = "+ book);return "{'module':'book update success'}";}
}

• @RestController 声明为Rest风格控制器

• @RequestMapping("/books")  路径

• @PostMapping   Post请求

• @GetMapping    Get请求

• @DeleteMapping("/{id}")  Delete请求

• @PutMapping   Put请求

• Json格式参数必须加上@ReqeustBody 注解