SpringBoot整合拦截器和日期转换器

一、SpringBoot整合拦截器

1.添加拦截器

java 复制代码

package com.by.interceptor;

import com.by.pojo.User;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

@Component
public class LoginInterceptor implements HandlerInterceptor {

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        Object user = request.getSession().getAttribute("user");
        if(user!=null){
            return true;
        }
        response.sendRedirect("/");
        return false;
    }
}

2.配置拦截器

java 复制代码

@Component
public class SpringMVCConfig implements WebMvcConfigurer {

    @Autowired
    private LoginInterceptor loginInterceptor;
    //配置拦截器
    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        //registry.addInterceptor(new LoginInterceptor()).addPathPatterns("/user/**").excludePathPatterns("/user/login");
        registry.addInterceptor(loginInterceptor).addPathPatterns("/user/**").excludePathPatterns("/user/login");
    }
}

3.运用拦截器

二、SpringBoot整合日期转换器

1.添加日期转换器

java 复制代码

package com.by.converter;

import java.text.ParseException;
import java.util.Date;

import org.springframework.core.convert.converter.Converter;
import org.apache.commons.lang3.time.DateUtils;

public class DateConverter implements Converter<String, Date>{

	/**
	 * 配置日期转换器
	 * @param str
	 * @return
	 */
	@Override
	public Date convert(String str) {
		try {
			String[] patterns = new String[]{
					"yyyy-MM-dd","yyyy-MM-dd hh:mm:ss","yyyy/MM/dd","yyyy/MM/dd hh:mm:ss",
					"MM-dd-yyyy","dd-MM-yyyy"};
			return DateUtils.parseDate(str, patterns);
		} catch (ParseException e) {
			e.printStackTrace();
		}
		return null;
	}
}

2.配置日期转换器

说明

WebMvcConfigurer配置类其实是Spring内部的一种配置方式，采用JavaBean的形式来代替传统的xml配置文件形式针对框架进行个性化定制，例如：拦截器，类型转化器等等。
代码示例

java 复制代码

@Component
public class SpringMVCConfig implements WebMvcConfigurer {
   
    //配置日期转换器
    @Override
    public void addFormatters(FormatterRegistry registry) {
        registry.addConverter(new DateConverter());
    }
}