写测试时用占位符 MessageFormat.format 输出报错仔细查看了一下我的语句 System.out.println(MessageFormat.format( "{method:{0}.{1},params:{2},user:[id:{3},username:{4}],ip:{5},dateTime:{6},operationCode:{7},type:{8},creater:{9},requestUrl:{10}}" ,cla,method,json.toString(),userid,use...