自己写的计算时间坐标的代码

来源：互联网发布：大恒加密软件破解编辑：程序博客网时间：2024/05/16 12:52

1 数据库sql查询的数据

2 最终echarts画出来的图

3 代码如下

计算主方法方法

/** * echarts算时间轴代码(算流量的代码),这里的时间间隔为5秒钟,一分钟的流量,totalSize = 12 * ebuStreamList 为EbuStream的集合, EbuStream的属性有totalStream,time * totalSize为x轴有多少点 * startTime 为起始时间 * */private String[] getEbuStream(List<EbuStream> ebuStreamList,int totalSize,String startTime) throws ParseException{String[] totalStreamArray = new String[totalSize];String currentTime  = startTime; //起始时间变量int pointer = 0; //时间指针int counter = 0 ;//计数器for(int i = 0 ;  i < totalSize ; i ++){ // 遍历开始,为每个点赋值String nextTime = ChartsTimeUtil.getNextTime(currentTime, 1); //下一次时间//校验时间if(ebuStreamList!=null&&ebuStreamList.size()>pointer){String cpuTime  = ebuStreamList.get(pointer).getTime();//得到当前流量实体的时间/** * 假设时间为 * currentTime = 2016-05-07 22:10:46 * cpuTime = 2016-05-07 22:10:48 * nextTime = 2016-05-07 22:10:51 * 则cpuTime在currentTime和nextTime之间 * 执行if( ChartsTimeUtil.isBigger(cpuTime, currentTime) && ChartsTimeUtil.isBigger(nextTime, cpuTime) )里面的代码 *  * */if( ChartsTimeUtil.isBigger(cpuTime, currentTime) && ChartsTimeUtil.isBigger(nextTime, cpuTime) ){totalStreamArray[i] = ""+ebuStreamList.get(pointer).getTotalStream()+"";pointer++;counter++;}/** * 假设时间为 * cpuTime = 2016-05-07 22:10:45 * currentTime = 2016-05-07 22:10:46 * nextTime = 2016-05-07 22:10:51 * 则cpuTime在currentTime和nextTime的左侧 * 执行else if(ChartsTimeUtil.isBigger(currentTime, cpuTime))里面的代码 *  * */else if(ChartsTimeUtil.isBigger(currentTime, cpuTime)){pointer++;nextTime = currentTime;i--;}/** * 假设时间为 * currentTime = 2016-05-07 22:10:46 * nextTime = 2016-05-07 22:10:51 * cpuTime = 2016-05-07 22:10:53 * 则cpuTime在currentTime和nextTime的右侧 * 执行下面else里面的代码 *  * */else{totalStreamArray[i] = "";counter++;}}/** * 当ebuStreamList为空的时候执行下面else代码 * */else{totalStreamArray[i] = "";counter++;}currentTime = nextTime; // 当前时间往下移一个点}return totalStreamArray;}

ChartsTimeUtil.getNextTime方法代码

/** * 得到下一个点的时间 * private static Calendar calendar = Calendar.getInstance();  * private static SimpleDateFormat simpleDateFormat=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); * ChartsSnmpTimerTask.timeFrequency=1000 * 5;  // 时间间隔5秒钟 *  * **/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代码

/**   * 比较两个日期之间的大小  *   * @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实体类

package com.nufront.euht.web.ebu.model;import java.sql.Timestamp;/** * ebu流量实体 * */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;}}

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