原文地址：http://www.blogjava.net/landor2004/articles/sort.html
用Collections.sort方法對list排序有兩種方法第一種是list中的對象實(shí)現(xiàn)Comparable接口，如下：
/*** 根據(jù)order對User排序*/public class User implements Comparable<User>{ PRivate String name; private Integer order; public String getName() { return name; } public void setName(String name) { this.name = name; } public Integer getOrder() { return order; } public void setOrder(Integer order) { this.order = order; } public int compareTo(User arg0) { return this.getOrder().compareTo(arg0.getOrder()); }}測試一下：public class Test{ public static void main(String[] args) { User user1 = new User(); user1.setName("a"); user1.setOrder(1); User user2 = new User(); user2.setName("b"); user2.setOrder(2); List<User> list = new ArrayList<User>(); //此處add user2再add user1 list.add(user2); list.add(user1); Collections.sort(list); for(User u : list){ System.out.println(u.getName()); } }}輸出結(jié)果如下ab第二種方法是根據(jù)Collections.sort重載方法來實(shí)現(xiàn)，例如：/*** 根據(jù)order對User排序*/public class User { //此處無需實(shí)現(xiàn)Comparable接口 private String name; private Integer order; public String getName() { return name; } public void setName(String name) { this.name = name; } public Integer getOrder() { return order; } public void setOrder(Integer order) { this.order = order; }}主類中這樣寫即可：public class Test{ public static void main(String[] args) { User user1 = new User(); user1.setName("a"); user1.setOrder(1); User user2 = new User(); user2.setName("b"); user2.setOrder(2); List<User> list = new ArrayList<User>(); list.add(user2); list.add(user1); Collections.sort(list,new Comparator<User>(){ public int compare(User arg0, User arg1) { return arg0.getOrder().compareTo(arg1.getOrder()); } }); for(User u : list){ System.out.println(u.getName()); } }}輸出結(jié)果如下ab前者代碼結(jié)構(gòu)簡單，但是只能根據(jù)固定的屬性排序，后者靈活，可以臨時指定排序項(xiàng)，但是代碼不夠簡潔擇優(yōu)用之。新聞熱點(diǎn)
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