自定义LocalResolver

package com.syc.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.util.StringUtils;
import org.springframework.web.servlet.LocaleResolver;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.Locale;

@Configuration
public class MyLocaleResovle implements LocaleResolver {

    // 自定义 区域解析方式
    @Override
    public Locale resolveLocale(HttpServletRequest httpServletRequest) {
        // 获取页面手动传递的语言参数值l  : zh_CN  en_US  ''
        String l = httpServletRequest.getParameter("l");
        Locale locale = null;
        if(!StringUtils.isEmpty(l)){
            // 如果参数不为空，就根据参数值进行手动语言切换
            String[] s = l.split("_");
            locale = new Locale(s[0],s[1]);
        }else {
            //Accept-Language: zh-CN ,zh;q=0.9
            String header = httpServletRequest.getHeader("Accept-Language");
            String[] split = header.split(",");
            String[] split1 = split[0].split("-");
            locale = new Locale(split1[0],split1[1]);
        }


        return locale;
    }

    @Override
    public void setLocale(HttpServletRequest httpServletRequest, 
            HttpServletResponse httpServletResponse, Locale locale) {

    }

    // 将自定义的MyLocaleResovle重新注册成一个类型为LocaleResolver的bean组件
    @Bean
    public LocaleResolver localeResolver(){
        return new MyLocaleResovle();
    }
}