使用Guava把List轉Map

這裏只是舉一個例子：

一、建立一個實體類（學生類）

public class Student {

	private Integer id;
	private String name;
	private Integer age;
	
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
        public Integer getId() {
		return id;
	}
	public void setId(Integer id) {
		this.id = id;
	}
	public Integer getAge() {
		return age;
	}
	public void setAge(Integer age) {
		this.age = age;
	}

	@Override
	public String toString() {
		return "Student [id=" + id + ", name=" + name + ", age=" + age + "]";
	}

}

二、建立一個測試類
 

import java.util.List;
import java.util.Map;
import com.google.common.base.Function;
import com.google.common.collect.Lists;
import com.google.common.collect.Maps;

public class TestDemo {
    public static void main(String[] args) {

                Student student1 = new Student();
		student1.setId(110);
		student1.setName("李明");
		student1.setAge(23);
		
		Student student2 = new Student();
		student2.setName("明浩");
		student2.setId(119);
		student2.setAge(24);
		
		List<Student> list = Lists.newArrayList();
		
		list.add(student1);
		list.add(student2);
		
		Map<Integer,Student> mappedMovies = Maps.uniqueIndex(list, new Function<Student,Integer>() {  
			 @Override 
			 public Integer apply(Student student) {  
				return student.getId();
	        }}); 
		
		System.out.println("根據學號查學生名稱："+mappedMovies.get(110).getName());
    }    

}

三、guava 下載地址
     下載到本地 

     maven :    

     <dependency>
            <groupId>com.google.guava</groupId>
            <artifactId>guava</artifactId>
            <version>19.0</version>
     </dependency>