如何分割我的列表？

我是新來的Java和過去幾個星期，我試圖修改一個Web應用程序。我得到了一個鏈接到一個mysql表的鏈表，這個鏈表需要被分成兩個表（第一個和第二個工作清單是一個清單，第三個工作清單是另一個清單）。現在我的名單看起來是這樣的：如何分割我的列表？

private List<Workbreak> workbreaks = new ArrayList<Workbreak>(); 

@OneToMany(fetch= FetchType.EAGER, cascade = {CascadeType.PERSIST, CascadeType.MERGE}) 
    @JoinTable(name = "workbreak", joinColumns = {@JoinColumn(name="conveyorId")}, inverseJoinColumns={@JoinColumn(name="Id")}) 
    public List<Workbreak> getWorkbreaks() { 
     return workbreaks; 
    } 
    public void setWorkbreaks(List<Workbreak> workbreaks) { 
     this.workbreaks = workbreaks; 
    }

workbreak表包含3行的休息1休息2和3，突破現在當任何休息時間我得到的屏幕上的工作休息的消息，我想，當是突破3來顯示不同的信息。

這些是如果破裂或不是如何檢查：

<FRAMESET ROWS="100%" border="0" bordercolor="black" onLoad="starttime()"> 
<% monitor.refreshInformation(request.getParameter("conveyorId"));%> 

<%if (monitor.getCurrentResultSet() == null){%> 
    <FRAME SRC="conveyorShiftbreak.jsp" SCROLLING=NO NAME=MAIN> 
<%}else { 
    if (monitor.getCurrentResultSet().isWorkBreak()){ %> 
      <FRAME SRC="conveyorWorkbreak.jsp" SCROLLING=YES NAME=MAIN> 
    <%} else {%> 
      <FRAME SRC="conveyorMonitor.jsp" SCROLLING=NO NAME=MAIN>  
    <%}%> 
<%}%>

所以我就isWorkBreak覆蓋所有的休息。

boolean isWorkBreak = false; 
public boolean isWorkBreak(){ 

    try{ 
    isWorkBreak = false; 
    Date current = Utils.getCalendarToTime(java.util.Calendar.getInstance()); 
    int offset = TimeZone.getDefault().getOffset(current.getTime()); 
    java.util.Calendar calclone = java.util.Calendar.getInstance(); 
    calclone.setTime(current); 
    calclone.add(java.util.Calendar.MILLISECOND, offset); 
    long currentTime = calclone.getTimeInMillis(); 

    String sfStart = Utils.getFormatedTime(getShift().getStartTime()); 
    long shiftStart = Utils.parseTimestamp(sfStart).getTimeInMillis(); 
    String sfEnd = Utils.getFormatedTime(getShift().getEndTime()); 
    long shiftEnd = Utils.parseTimestamp(sfEnd).getTimeInMillis(); 

    long shift = getShiftMinutes(sfStart, sfEnd); 

    List<Workbreak> workbreaks = getWorkbreaks(); 
    for (Workbreak workbreak :workbreaks){ 
     String wbStart = Utils.getFormatedTime(workbreak.getStartTime()); 
     String wbEnd = Utils.getFormatedTime(workbreak.getEndTime()); 
     long wTimeFrame = getShiftMinutes(wbStart, wbEnd); 
     if (wTimeFrame >0){ 
      long workbreakStart = Utils.parseTimestamp(wbStart).getTimeInMillis(); 
      long workbreakEnd = Utils.parseTimestamp(wbEnd).getTimeInMillis(); 
      //do correction 
      if (workbreakStart <shiftStart){//shift is in the next day 
       workbreakStart += 24*60*60*1000; //add one day 
       workbreakEnd += 24*60*60*1000; //add one day 
      } 

      if (shiftStart <= workbreakStart && currentTime<shiftStart){//curent time is next day 
       currentTime += 24*60*60*1000; //add one day 
      } 

      if (currentTime > workbreakStart && currentTime < workbreakEnd){ 
       isWorkBreak = true; 
       workbrakeRemaingMinutes = (workbreakEnd - currentTime)/1000/60; 
       break; 
      } 

     } 
    } 
    } 
    catch (Exception e) { 
     logger.error("!!!ERROR isWorkBreak" + e.getMessage()); 
    } 
    return isWorkBreak; 
}

所以我嘗試是創建鏈接到同一個表「workbreak」一個新的列表，並覆蓋isWorkBreak2內第3次破發。但是現在，即使我在屏幕上收到相同的消息，我也可以使用getCurrentResultSet().isWorkBreak或getCurrentResultSet().isWorkBreak2。

<% monitor.refreshInformation(request.getParameter("conveyorId"));%> 

<%if (monitor.getCurrentResultSet() == null){%> 
      <FRAME SRC="conveyorShiftbreak.jsp" SCROLLING=NO NAME=MAIN> 
<%}else if (monitor.getCurrentResultSet().isWorkBreak2()){ %> 
      <FRAME SRC="conveyorSDiscussion.jsp" SCROLLING=YES NAME=MAIN> 
<%}else if (monitor.getCurrentResultSet().isWorkBreak()){ %> 
      <FRAME SRC="conveyorWorkbreak.jsp" SCROLLING=NO NAME=MAIN> 
<%}else {%> 
      <FRAME SRC="conveyorMonitor.jsp" SCROLLING=NO NAME=MAIN> 
<%} %>

任何提示我如何能在2分割清單，並使其顯示不同的消息？謝謝！

這裏是

workbreak

來源

2016-08-12 Calin Laurentiu Dragan