加载Properties文件工具类：LoadConfig

import javax.servlet.http.HttpServletRequest;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.QueryParam;
import javax.ws.rs.core.Context;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;

import org.apache.commons.lang3.StringUtils;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;

import com.zzc.bl.util.ConfigMgr;
import com.zzc.bl.util.StringEncryptUtil;

@Path("/loadConfig")
@Produces(MediaType.APPLICATION_JSON)
public class LoadConfig {
	private static final Logger logger = LogManager.getLogger(LoadConfig.class.getName());

//	private static final String token = UUID.randomUUID().toString() + System.currentTimeMillis();
//	private static final String token = "c2d4f7e8e001486114862926";
//	private static final String single = "1fc54ecc9c6f4dfd9799b7baec1b0de6";
	private static final String salt = "3f73c5fafaf13f160670b59025745889";
	@GET
	@Path("/loading")
	public Response loading(@QueryParam("token") String token,@QueryParam("single") String single,@Context HttpServletRequest request) {
		final String requestPath = request.getPathInfo();
		logger.info("[entrance: " + requestPath + "] [params: { \"token\": \"" + token + "\", \"single\": \"" + single + "\" } ]");
		// 检测请求合法性
		if(StringUtils.isEmpty(token)){
			logger.info("[entrance: " + requestPath + "] [response_status: 400] [response_body: { \"errors\": \"token is empty !!!\" } ]");
			return Response.status(400).entity("{\"errors\": \"token is empty !!!\"}").build();
		}
		if(StringUtils.isEmpty(single)){
			logger.info("[entrance: " + requestPath + "] [response_status: 400] [response_body: { \"errors\": \"single is empty !!!\" } ]");
			return Response.status(400).entity("{\"errors\": \"single is empty !!!\"}").build();
		}
		String content = salt + StringEncryptUtil.md5(token);
		String mdStr = StringEncryptUtil.md5(content);
		if(!mdStr.equals(single)){
			logger.info("[entrance: " + requestPath + "] [response_status: 400] [response_body: { \"errors\": \"single is invalid !!!\" } ]");
			return Response.status(400).entity("{\"errors\": \"single is invalid !!!\"}").build();
		}
		// 加载Properties属性文件
		ConfigMgr.init("config.properties");
		logger.info("[entrance: " + requestPath + "] [response_status: 200] [response_body: {\"success\": \"properties files has been loaded !!!\"} ]");
		return Response.status(200).entity("{\"success\": \"properties files has been loaded !!!\"}").build();
	}

}