springboot（15）- 整合web開發（7）- 加載 xml 配置,註冊攔截器

1 加載 xml 配置文件

package com.tzb;

public class SayHello {

    public String sayHello(){
        return "hello xml";
    }
}

• beans.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
    <bean id="sayHello" class="com.tzb.SayHello"></bean>
</beans>

• 配置類

package com.tzb;

import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Import;
import org.springframework.context.annotation.ImportResource;

@Configuration
@ImportResource(locations = "classpath:beans.xml")
public class WebMvcConfig {

}

---

• 單元測試

@RunWith(SpringRunner.class)
@SpringBootTest
public class XmlApplicationTests {

    @Autowired
    private SayHello sayHello;

    @Test
    public void contextLoads() {
        System.out.println(sayHello.sayHello());
    }

}

2 註冊攔截器

• 攔截器類

public class MyInterceptor implements HandlerInterceptor {

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {

        System.out.println("preHandle");

        return true;
    }

    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
        System.out.println("postHandle");
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        System.out.println("afterCompletion");
    }
}

• 配置類

@Configuration
public class WebMvcConfig implements WebMvcConfigurer {

    @Bean
    MyInterceptor myInterceptor(){
        return new MyInterceptor();
    }


    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(myInterceptor()).addPathPatterns("/**");
    }
}

• Controller

@RestController
public class HelloController {

    @GetMapping("/hello")
    public String hello(){
        return "hello";
    }

}