spring boot java对象以json返回，自定义拦截器，配置文件

spring boot java对象以json格式返回
类上加@RestController注解
方法上加@RequestMapping注解
如:

@RestController
public class HelloWorldController {
    
	@RequestMapping("/getUser")
    public User getUser() {
    	User user=new User();
    	user.setUserName("黄渤");
    	user.setAge("1234");
        return user;
    }
 }

如果不需要json格式的返回，直接用@Controller就可以

自定义拦截器
1.实现 Filter 接口，实现 Filter 方法
2.添加@Configuration 注解，将自定义Filter加入过滤链

package com.example.demo;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;

import org.apache.catalina.filters.RemoteIpFilter;
import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
public class WebConfiguration {
    @Bean
    public RemoteIpFilter remoteIpFilter() {
        return new RemoteIpFilter();
    }
    
    @Bean
    public FilterRegistrationBean testFilterRegistration() {

        FilterRegistrationBean registration = new FilterRegistrationBean();
        registration.setFilter(new MyFilter());
        registration.addUrlPatterns("/*");
        registration.addInitParameter("paramName", "paramValue");
        registration.setName("MyFilter");
        registration.setOrder(1);
        return registration;
    }
    
    public class MyFilter implements Filter {
		@Override
		public void destroy() {
			// TODO Auto-generated method stub
		}

		@Override
		public void doFilter(ServletRequest srequest, ServletResponse sresponse, FilterChain filterChain)
				throws IOException, ServletException {
			System.out.println("进入拦截器");
			// TODO Auto-generated method stub
			HttpServletRequest request = (HttpServletRequest) srequest;
			System.out.println("this is MyFilter,url :"+request.getRequestURI());
			filterChain.doFilter(srequest, sresponse);
		}

		@Override
		public void init(FilterConfig arg0) throws ServletException {
			// TODO Auto-generated method stub
		}
    }
}

配置文件：src/main/resources/application.properties

com.neo.title=happy new year
com.neo.description=good boy

--日志文件
logging.file=log.log

以@Controller或@RestController注解的类中添加

@Value("${com.neo.title}")
	private String title;
	@Value("${com.neo.description}")
	private String description;
	
	@RequestMapping("/config")
	public String getMessage() {
		return "title = "+title+"  description = "+description;
	}