关键点:将List内存储的对象实现Comparable类。重写它的compareTo()方法就可以
Bean:
package chc; public class StuVo implements Comparable<StuVo>{ private String id; private String name; private Integer age; public StuVo(String id, String name, Integer age) { this.id=id; this.name=name; this.age=age; } public int compareTo(StuVo stu) { return this.name.compareTo(stu.getName()); } public String getId() { return id; } public void setId(String id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public Integer getAge() { return age; } public void setAge(Integer age) { this.age = age; } }
Demo:
package chc; import java.util.ArrayList; import java.util.Collections; import java.util.Iterator; import java.util.List; public class ArrayListSortDemo { public static void main(String[] args) { List<StuVo> stuList=new ArrayList<StuVo>(); StuVo stu=new StuVo("1","h小明",11); stuList.add(stu); stu=new StuVo("2","d阿熊",15); stuList.add(stu); stu=new StuVo("3","a张三",10); stuList.add(stu); stu=new StuVo("4","b李四",15); stuList.add(stu); Collections.sort(stuList); Iterator<StuVo> it =stuList.iterator(); while(it.hasNext()){ System.out.println(it.next().getName()); } } }