springboot 国际化设置

1.生成各类文字properties文件

2.全局控制处理器

package com.mochain.moline.common.interceptor;
import com.mochain.moline.common.result.ResultVo;
import com.mochain.moline.common.util.InternationalUtil;
import org.springframework.core.MethodParameter;
import org.springframework.http.MediaType;
import org.springframework.http.server.ServerHttpRequest;
import org.springframework.http.server.ServerHttpResponse;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.servlet.mvc.method.annotation.ResponseBodyAdvice;
import javax.annotation.Resource;
/**
 * @author zhangning
 * @date 2020/07/09
 * 全局控制器处理
 */
@ControllerAdvice
public class ResponseBodyInterceptor implements ResponseBodyAdvice {
    @Resource
    private InternationalUtil internationalUtil;
    @Override
    public boolean supports(MethodParameter methodParameter, Class aClass) {
        return true;
    }
    @Override
    public Object beforeBodyWrite(Object body, MethodParameter methodParameter, MediaType mediaType, Class aClass, ServerHttpRequest serverHttpRequest, ServerHttpResponse serverHttpResponse) {
        //控制器结果为字符串才进行处理
        if (body instanceof ResultVo){
            ResultVo resultVo = (ResultVo)body;
            String interNationalMsg = internationalUtil.getInterNationalMsg(resultVo.getMsg());
            resultVo.setMsg(interNationalMsg);
            return resultVo;
        }
        return body;
    }
}

3.国际化工具类

package com.mochain.moline.common.util;

import com.google.common.base.Charsets;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.CharSetUtils;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import javax.swing.text.StringContent;
import java.nio.charset.Charset;
import java.text.MessageFormat;
import java.util.Locale;
import java.util.ResourceBundle;

/**
 * 国际化工具类
 * @author zhangnign
 * @date 2020/07/09
 */
@Component
@Slf4j
public class InternationalUtil {
    @Resource
    private HttpServletRequest request;

    @Value("${i18n.path}")
    private String i18nPath;

    private static final String ACCEPT_LANGUAGE ="Accept-Language";
    private static final String LANGUAGE_SEPARATOR ="-";
    /**
     * 获取国际化消息
     * @param key 国际化的key
     * @param args 被替换占位符的值
     * 1.带#号的不是key的字符串，直接过滤#号
     * 2.是key的字符串，有占位符的替换
     * 3.不是key的字符串，返回字符串本身
     *
     */
    public String getInterNationalMsg(String key, Object... args) {
        ResourceBundle rb;
        String requestHeader = request.getHeader(ACCEPT_LANGUAGE);
        //是key的字符串，有占位符的替换
        try {
            //如en-US,zh-CN
            if (StringUtils.isNotBlank(requestHeader) && requestHeader.contains(LANGUAGE_SEPARATOR)) {
                rb = ResourceBundle.getBundle(i18nPath, new Locale(requestHeader.split(LANGUAGE_SEPARATOR)[0], requestHeader.split(LANGUAGE_SEPARATOR)[1]));
            } else {
                rb = ResourceBundle.getBundle(i18nPath);
            }
            return rb.getString(key);
        } catch (Exception e) {
            log.error("国际化消息异常：",e);
            //不是key的字符串，返回字符串本身
            return key;
        }
    }
}

4.请求头处理