java内部排序
1 public class MergeWorkAssignment implements Comparable<MergeWorkAssignment> 2 实现方法 3 public int compareTo(MergeWorkAssignment o) { 4 return this.getVocabularyName().compareToIgnoreCase(o.getVocabularyName()); 5 }
1 public class BriefTermExGroupSortBySourceGroup implements Comparator { 2 public int compare(Object o1, Object o2) { 3 int result = 0; 4 long d1 = ((BriefTermExGroup) o1).getPreferred(); 5 long d2 = ((BriefTermExGroup) o2).getPreferred(); 6 7 if (d1 > d2) { 8 result = 1; 9 } else { 10 if (d1 == d2) { 11 long group1 = ((BriefTermExGroup) o1).getSourceGroupId(); 12 long group2 = ((BriefTermExGroup) o2).getSourceGroupId(); 13 if (group1 > group2) { 14 result = 1; 15 } else { 16 if (group1 == group2) { 17 result = 0; 18 } else { 19 result = -1; 20 } 21 } 22 } else { 23 result = -1; 24 } 25 } 26 return result; 27 } 28 }
调用:
Collections.sort(vBriefTermExGroup, new BriefTermExGroupSortBySourceGroup());
1 日期 2 3 package tcweb.config; 4 5 import java.util.Comparator; 6 import java.util.Date; 7 8 public class VocabularyDateComparator implements Comparator { 9 public int compare(Object o1, Object o2) { 10 int result=0; 11 Date date1 = ( (Vocabulary) o1).getRegisteredTime(); 12 Date date2 = ( (Vocabulary) o2).getRegisteredTime(); 13 if (date1 == null) 14 return 1; 15 if (date2 == null) 16 return -1; 17 18 if(date1 != null && date2 != null){ 19 result = date2.compareTo(date1); 20 } 21 return result; 22 23 } 24 25 }
1 数字 2 3 package tcweb.config; 4 5 import java.util.Comparator; 6 7 public class VocabularyTypeCompatarot implements Comparator { 8 public int compare(Object o1, Object o2) { 9 int result=0; 10 long d1 = ( (Vocabulary) o1).getVocabularyType(); 11 long d2 = ( (Vocabulary) o2).getVocabularyType(); 12 if (d1 > d2) { 13 result = 1; 14 } else { 15 if (d1 == d2) { 16 result = 0; 17 } else { 18 result = -1; 19 } 20 } 21 return result; 22 } 23 24 }
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