这两天要做mongodb日志的模块，下面记录一下。
一、
首先要导入一批数据，使用springboot来完成。
配置mongodb的复制集：在application.yml文件中配置uri来完成
格式：mongodb://用户名:密码@ip:端口[,ip:端口] [,ip:端口]/数据库名
下面注入mongoTemplate：
二、
Mongodb在java中分组使用应该有两三种方式：可以百度一下
下面我贴上我们项目组使用的代码：
| @Service("logMongoService") public class LogMongoServiceImpl implements LogMongoService { /** * 按月统计登录次数使用的初始化的js对象 */ private static final String initMonthGroupByJs = "{total:0," + "JanCount:0," + "FebCount:0," + "MarCount:0," + "AprCount:0," + "MayCount:0," + "JuneCount:0," + "JulyCount:0," + "AugCount:0," + "SepCount:0," + "OctCount:0," + "NovCount:0," + "DecCount:0}"; /** * 按月统计登录次数使用的js，mongodb在执行时会自动的执行此脚本 */ private static final String monthGroupByJs = "function(doc, prev){" + "prev.total += 1;" + "if (doc.startTime.getFullYear() == searchYear && doc.startTime.getMonth() == 0) {" + "prev.JanCount += 1;" + "}" + "if (doc.startTime.getFullYear() == searchYear && doc.startTime.getMonth() == 1) {" + "prev.FebCount += 1;" + "}" + "if (doc.startTime.getFullYear() == searchYear && doc.startTime.getMonth() == 2) {" + "prev.MarCount += 1;" + "}" + "if (doc.startTime.getFullYear() == searchYear && doc.startTime.getMonth() == 3) {" + "prev.AprCount += 1;" + "}" + "if (doc.startTime.getFullYear() == searchYear && doc.startTime.getMonth() == 4) {" + "prev.MayCount += 1;" + "}" + "if (doc.startTime.getFullYear() == searchYear && doc.startTime.getMonth() == 5) {" + "prev.JuneCount += 1;" + "}" + "if (doc.startTime.getFullYear() == searchYear && doc.startTime.getMonth() == 6) {" + "prev.JulyCount += 1;" + "}" + "if (doc.startTime.getFullYear() == searchYear && doc.startTime.getMonth() == 7) {" + "prev.AugCount += 1;" + "}" + "if (doc.startTime.getFullYear() == searchYear && doc.startTime.getMonth() == 8) {" + "prev.SepCount += 1;" + "}" + "if (doc.startTime.getFullYear() == searchYear && doc.startTime.getMonth() == 9) {" + "prev.OctCount += 1;" + "}" + "if (doc.startTime.getFullYear() == searchYear && doc.startTime.getMonth() == 10) {" + "prev.NovCount += 1;" + "}" + "if (doc.startTime.getFullYear() == searchYear && doc.startTime.getMonth() == 11) {" + "prev.DecCount += 1;" + "}" + "}"; @Override public void findMonthLogin(MongoPage page, SystemLogQuery systemLogQuery) throws Exception{ //添加年份的限制 也就是查询条件 Criteria[] logType ={Criteria.where("logType").is("2")}; Calendar startCalendar = Calendar.getInstance(); startCalendar.set(year, 0, 1, 0,0, 0); Calendar endCalendar = Calendar.getInstance(); endCalendar.set(year + 1, 0, 1, 0,0, 0); Criteria[] yearCriteria ={Criteria.where("startTime").gte(startCalendar.getTime()).lt(endCalendar.getTime())}; logType = (Criteria[]) ArrayUtils.addAll(logType, yearCriteria); //组织分组时使用的js String initGroupByJs = initMonthGroupByJs; String groupByJs = monthGroupByJs.replace("searchYear", year + ""); //此处开始分组查询 //以name字段进行分组 GroupBy groupBy = new GroupBy("username","name","departmentName"). initialDocument(initGroupByJs). reduceFunction(groupByJs); //执行分组查询 GroupByResults groupByResults = logMongoDao.group(new Criteria().andOperator(logType), groupBy); //取出分组后的数据 这里必须是retval BasicDBList list = (BasicDBList) groupByResults.getRawResults().get("retval"); page.setTotal(list.size()); //用来存放查询到的list集合 List<SystemLogVO> logVOList = new ArrayList<SystemLogVO>(); for (int i = (page.getPageNumber()-1) * page.getPageSize(); i < page.getPageNumber() * page.getPageSize() && i < list.size(); i++) { SystemLogVO systemlog = new SystemLogVO(); //在这个obj中就包含了所有的分组后，我们自定义的哪些属性的值 BasicDBObject obj = (BasicDBObject)list.get(i); systemlog.setName(obj.get("name") == null? "" : obj.get("name").toString()); systemlog.setDepartmentName(obj.get("departmentName") == null?"":obj.get("departmentName").toString()); systemlog.setUsername(obj.get("username") == null?"":obj.get("username").toString()); //获取其中的月份的值 obj.get("total");//总的值 obj.get("JanCount");//根据条件过滤后，统计的1月份的值 obj.get("DecCount"); } } } |
需要说明的一点是，groupByJs这个是一个回调函数，
当mongodb在过滤数据时，会调用这个js方法，doc变量是将正在处理的一条数据传输进来，prev相当于上面定义的initMonthGroupByJs中的js对象，
最后在initMonthGroupByJs中定义的对象会返回给我们，我们可以从prev中取到我们所有需要的数据。