Question

我有两个控制器。

我写了这个控制器，在这里我必须写config才能正确工作。

@Controller

public class BookController {

    private BookService bookService;

    @Autowired(required = true)
    @Qualifier(value = "bookService")
    public void setBookService(BookService bookService) {
        this.bookService = bookService;
    }

    @RequestMapping(value = "books", method = RequestMethod.GET)
    public String listBooks(Model model){
        model.addAttribute("book", new Book());
        model.addAttribute("listBooks", this.bookService.listBooks());

        return "books";
    }

}

@Controller("controller1")
public class AuthorController {
        private AuthorService  authorService;

        @Autowired(required = true)
        @Qualifier(value = "authorService")
        public void setBookService(AuthorService authorService) {
            this.authorService = authorService;
        }

        @RequestMapping
        (value = "authors", method = RequestMethod.GET)
        public String listAuthors(Model model){
           model.addAttribute("author", new Author());
           model.addAttribute("listAuthors", this.authorService.list());

           return "";
        }
    }

Answer 1

如果您使用基于Xml的配置，请尝试将此配置添加到dispatcherServlet.xml

<context:component-scan base-package="com.example.controllers"/>

，如果您使用基于Java的配置，请将此代码添加到WebMvcConfigurerAdapter实现配置类中

@EnableWebMvc
@ComponentScan(basePackages = "com.example.controllers")

示例：

@Configuration
@EnableWebMvc
@ComponentScan(basePackages = "com.example.controllers")
public class SpringConfig extends WebMvcConfigurerAdapter{

    @Bean
    public ViewResolver viewResolver() {
        InternalResourceViewResolver viewResolver = new InternalResourceViewResolver();
        viewResolver.setViewClass(JstlView.class);
        viewResolver.setPrefix("/WEB-INF/pages/");
        viewResolver.setSuffix(".jsp");
        return viewResolver;
    }
    @Override
    public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {
        configurer.enable();
    }
}

Answer 2

好吧，我相信添加就足够了

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-web</artifactId>
</dependency>

放入pom.xml并在您的@EnableWebMvc文件中添加AppConfig注释

UPD 假设您有一个应用程序com.foo.app.AppName 然后，要解决该问题，您必须创建一个类com.foo.app.AppName.AppConfig并至少添加以下内容：

@Configuration
@EnableWebMvc
public class AppConfig extends WebMvcConfigurerAdapter {
}

实施WebMvcConfigurerAdapter不是铁腕规则-您可以根据ypu的需要使用任何配置程序

Answer 3

您可以通过以下方式自动连接服务：

    @Controller
    @RequestMapping("book")
    public class BookController {

        @Autowired
        private BookService bookService;

        @GetMapping("find_all")
        public String list(Model model) {
            model.addAttribute("book", bookService.findAll());
            return "book/list";
        }

配置两个控制器

3 个答案: