Initial commit

src/main/java/com/nlf/calendar/SolarSeason.java

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+package com.nlf.calendar;
+
+import java.util.ArrayList;
+import java.util.Calendar;
+import java.util.Date;
+import java.util.List;
+
+/**
+ * 阳历季度
+ */
+public class SolarSeason {
+  /** 年 */
+  private int year;
+  /** 月 */
+  private int month;
+
+  /**
+   * 默认当月
+   */
+  public SolarSeason(){
+    this(new Date());
+  }
+
+  /**
+   * 通过日期初始化
+   */
+  public SolarSeason(Date date){
+    Calendar c = Calendar.getInstance();
+    c.setTime(date);
+    year = c.get(Calendar.YEAR);
+    month = c.get(Calendar.MONTH)+1;
+  }
+
+  /**
+   * 通过日历初始化
+   */
+  public SolarSeason(Calendar calendar){
+    year = calendar.get(Calendar.YEAR);
+    month = calendar.get(Calendar.MONTH)+1;
+  }
+
+  /**
+   * 通过年月初始化
+   *
+   * @param year 年
+   * @param month 月
+   */
+  public SolarSeason(int year, int month){
+    this.year = year;
+    this.month = month;
+  }
+
+  /**
+   * 获取年
+   *
+   * @return 年
+   */
+  public int getYear(){
+    return year;
+  }
+
+  /**
+   * 获取月
+   *
+   * @return 月
+   */
+  public int getMonth(){
+    return month;
+  }
+
+  /**
+   * 获取当月是第几季度
+   * @return 季度序号，从1开始
+   */
+  public int getIndex(){
+    return (int)Math.ceil(month/3D);
+  }
+
+  /**
+   * 季度推移
+   * @param seasons 推移的季度数，负数为倒推
+   * @return 推移后的季度
+   */
+  public SolarSeason next(int seasons){
+    if(0==seasons){
+      return new SolarSeason(year,month);
+    }
+    Calendar c = Calendar.getInstance();
+    c.set(year,month-1,1);
+    c.add(Calendar.MONTH,3*seasons);
+    return new SolarSeason(c);
+  }
+
+  /**
+   * 获取本季度的月份
+   * @return 本季度的月份列表
+   */
+  public List<SolarMonth> getMonths(){
+    List<SolarMonth> l = new ArrayList<SolarMonth>();
+    int index = getIndex()-1;
+    for(int i=0;i<3;i++){
+      l.add(new SolarMonth(year,3*index+i+1));
+    }
+    return l;
+  }
+
+  public String toString(){
+    return year+"."+getIndex();
+  }
+
+  public String toFullString(){
+    return year+"年"+getIndex()+"季度";
+  }
+}