1 數據庫sql查詢的數據

2 最終echarts畫出來的圖

3 代碼如下

計算主方法方法

/*** echarts算時間軸代碼(算流量的代碼),這里的時間間隔為5秒鐘,一分鐘的流量,totalSize = 12* ebuStreamList 為EbuStream的集合, EbuStream的屬性有totalStream,time* totalSize為x軸有多少點* startTime 為起始時間* */private String[] getEbuStream(List<EbuStream> ebuStreamList,int totalSize,String startTime) throws ParseException{String[] totalStreamArray = new String[totalSize];String currentTime = startTime; //起始時間變量int pointer = 0; //時間指針int counter = 0 ;//計數器for(int i = 0 ; i < totalSize ; i ++){ // 遍歷開始,為每個點賦值String nextTime = ChartsTimeUtil.getNextTime(currentTime, 1); //下一次時間//校驗時間if(ebuStreamList!=null&&ebuStreamList.size()>pointer){String cpuTime = ebuStreamList.get(pointer).getTime();//得到當前流量實體的時間/*** 假設時間為* currentTime = 2016-05-07 22:10:46* cpuTime = 2016-05-07 22:10:48* nextTime = 2016-05-07 22:10:51* 則cpuTime在currentTime和nextTime之間* 執行if( ChartsTimeUtil.isBigger(cpuTime, currentTime) && ChartsTimeUtil.isBigger(nextTime, cpuTime) )里面的代碼* * */if( ChartsTimeUtil.isBigger(cpuTime, currentTime) && ChartsTimeUtil.isBigger(nextTime, cpuTime) ){totalStreamArray[i] = ""+ebuStreamList.get(pointer).getTotalStream()+"";pointer++;counter++;}/*** 假設時間為* cpuTime = 2016-05-07 22:10:45* currentTime = 2016-05-07 22:10:46* nextTime = 2016-05-07 22:10:51* 則cpuTime在currentTime和nextTime的左側* 執行else if(ChartsTimeUtil.isBigger(currentTime, cpuTime))里面的代碼* * */else if(ChartsTimeUtil.isBigger(currentTime, cpuTime)){pointer++;nextTime = currentTime;i--;}/*** 假設時間為* currentTime = 2016-05-07 22:10:46* nextTime = 2016-05-07 22:10:51* cpuTime = 2016-05-07 22:10:53* 則cpuTime在currentTime和nextTime的右側* 執行下面else里面的代碼* * */else{totalStreamArray[i] = "";counter++;}}/*** 當ebuStreamList為空的時候執行下面else代碼* */else{totalStreamArray[i] = "";counter++;}currentTime = nextTime; // 當前時間往下移一個點}return totalStreamArray;}
ChartsTimeUtil.getNextTime方法代碼

/*** 得到下一個點的時間* private static Calendar calendar = Calendar.getInstance(); * private static SimpleDateFormat simpleDateFormat=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");* ChartsSnmpTimerTask.timeFrequency=1000 * 5; // 時間間隔5秒鐘* * **/public static String getNextTime(String currentTime ,int next) throws ParseException{if(currentTime==null||currentTime.replace(" ", "").equals("")) return null;calendar.setTime(simpleDateFormat.parse(currentTime));calendar.set(Calendar.SECOND , calendar.get(Calendar.SECOND) + ( ChartsSnmpTimerTask.timeFrequency / 1000 ) * next );return simpleDateFormat.format(calendar.getTime());}
ChartsTimeUtil.isBigger代碼

/** * 比較兩個日期之間的大小 * * @param d1 * @param d2 * @return 前者大于后者返回true 反之false * @throws ParseException */ public static boolean isBigger( String time1, String time2) throws ParseException { int result = time1.compareTo(time2);if(result>=0){return true;}else{return false;}}
EbuStream實體類

package com.nufront.euht.web.ebu.model;import java.sql.Timestamp;/*** ebu流量實體* */ public class EbuStream {private String id;private int upstream;private int downstream;private int totalStream;private String time;public String getId() {return id;}public void setId(String id) {this.id = id;}public int getUpstream() {return upstream;}public void setUpstream(int upstream) {this.upstream = upstream;}public int getDownstream() {return downstream;}public void setDownstream(int downstream) {this.downstream = downstream;}public int getTotalStream() {return totalStream;}public void setTotalStream(int totalStream) {this.totalStream = totalStream;}public String getTime() {return time;}public void setTime(String time) {this.time = time;}}

總結

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