list java中List对象通用排序算法

/**   * 学生实体类   * @author chenchuang   *   */  public class Student {      public Student(int id, String name, int age) {          super();          this.id = id;          this.name = name;          this.age = age;      }        private int id;      private String name;      private int age;        public int getId() {          return id;      }        public void setId(int id) {          this.id = id;      }        public String getName() {          return name;      }        public void setName(String name) {          this.name = name;      }        public int getAge() {          return age;      }        public void setAge(int age) {          this.age = age;      }  }

                                工具类：

import java.lang.reflect.InvocationTargetException;  import java.lang.reflect.Method;  import java.util.Collections;  import java.util.Comparator;  import java.util.List;    /**   * List对象排序的通用方法   *    * @author chenchuang   *    * @param <E>   */  public class ListSort<E> {      /**       *        * @param list 要排序的集合       * @param method 要排序的实体的属性所对应的get方法       * @param sort desc 为正序         */      public void Sort(List<E> list, final String method, final String sort) {          // 用内部类实现排序          Collections.sort(list, new Comparator<E>() {                public int compare(E a, E b) {                  int ret = 0;                  try {                      // 获取m1的方法名                      Method m1 = a.getClass().getMethod(method, null);                      // 获取m2的方法名                      Method m2 = b.getClass().getMethod(method, null);                        if (sort != null && "desc".equals(sort)) {                            ret = m2.invoke(((E)b), null).toString().compareTo(m1.invoke(((E)a),null).toString());                        } else {                          // 正序排序                          ret = m1.invoke(((E)a), null).toString().compareTo(m2.invoke(((E)b), null).toString());                      }                  } catch (NoSuchMethodException ne) {                      System.out.println(ne);                  } catch (IllegalArgumentException e) {                      // TODO Auto-generated catch block                      e.printStackTrace();                  } catch (IllegalAccessException e) {                      // TODO Auto-generated catch block                      e.printStackTrace();                  } catch (InvocationTargetException e) {                      // TODO Auto-generated catch block                      e.printStackTrace();                  }                  return ret;              }          });      }  }

                                测试类：

import java.util.ArrayList;    public class ListTest {        /**       * @param args       */      public static void main(String[] args) {          ArrayList<Student> list= new ArrayList<Student>();          list.add(new Student(1,"张三",5));          list.add(new Student(2,"李四",4));          list.add(new Student(3,"王五",3));          list.add(new Student(4,"小明",2));          list.add(new Student(5,"小黑",1));          ListSort<Student> listSort= new ListSort<Student>();          listSort.Sort(list, "getAge", "desc");          for(Student s:list){              System.out.println(s.getId()+s.getName()+s.getAge());          }        }    }

                                测试结果

1张三5  2李四4  3王五3  4小明2  5小黑1

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list java中List对象通用排序算法