Guava学习笔记：Guava新增集合类型-Multimap

　　在日常的开发工作中，虚拟主机，服务器空间，我们有的时候需要构造像Map<K, List<V>>或者Map<K, Set<V>>这样比较复杂的集合类型的数据结构，以便做相应的业务逻辑处理。例如：

import java.util.ArrayList;import java.util.HashMap;import java.util.List;import java.util.Map;import org.junit.Test;public class MultimapTest {Map<String, List<StudentScore>> StudentScoreMap = new HashMap<String, List<StudentScore>>();@Testpublic void testStudentScore(){for(int i=10;i<20;i++){StudentScore studentScore=new StudentScore();studentScore.CourseId=1001+i;studentScore.score=100-i;addStudentScore(“peida”,studentScore);}System.out.println(“StudentScoreMap:”+StudentScoreMap.size());System.out.println(“StudentScoreMap:”+StudentScoreMap.containsKey(“peida”));System.out.println(“StudentScoreMap:”+StudentScoreMap.containsKey(“jerry”));System.out.println(“StudentScoreMap:”+StudentScoreMap.size());System.out.println(“StudentScoreMap:”+StudentScoreMap.get(“peida”).size());List<StudentScore> StudentScoreList=StudentScoreMap.get(“peida”);if(StudentScoreList!=null&&StudentScoreList.size()>0){for(StudentScore stuScore:StudentScoreList){System.out.println(“stuScore one:”+stuScore.CourseId+” score:”+stuScore.score);}}}public void addStudentScore(final String stuName,final StudentScore studentScore) {List<StudentScore> stuScore = StudentScoreMap.get(stuName);if (stuScore == null) {stuScore = new ArrayList<StudentScore>();StudentScoreMap.put(stuName, stuScore);}stuScore.add(studentScore);}}class StudentScore{int CourseId;int score;}，香港服务器租用勇气执着的背负起那厚重的行囊，奔向远方。