Android 对汉字字符串按照拼音排序 Java

今天上水木发现有人问怎样对汉字字符串按照拼音排序，查了一遍文档，发现java缺省对字符串是按照每个Unicode字符的编码大小排序的。接着查到（要是没有了Google，世界将会怎样？）有一个java.text.Collator类，但是论坛上有人说这个类没用，和缺省的排序效果一样，要用C#写一个类生成java程序。这要是真的，那还学java干嘛？

于是把别人的Test.java改了改，分别用指定的Locale和不指定Locale试了试，结果都是OK的：
import java.util.*;

import java.text.*;

public class Test2 {

public static void testDefault() {

String[] arr = {"张三", "李四", "王五", "刘六"};

Arrays.sort(arr);

for (int i = 0; i < arr.length; i++)

System.out.println(arr[i]);

System.out.println();

}

public static void testChinaLocale() {

//Comparator cmp = (RuleBasedCollator)java.text.Collator.getInstance(java.util.Locale.CHINA);//try testing various locales

Comparator cmp = Collator.getInstance(java.util.Locale.CHINA);

String[] arr = {"张三", "李四", "王五", "刘六"};

Arrays.sort(arr, cmp);

for (int i = 0; i < arr.length; i++)

System.out.println(arr[i]);

System.out.println();

}

public static void testDefaultLocale() {

//Comparator cmp = (RuleBasedCollator)java.text.Collator.getInstance(java.util.Locale.CHINA);//try testing various locales

Comparator cmp = Collator.getInstance();

String[] arr = {"张三", "李四", "王五", "刘六"};

Arrays.sort(arr, cmp);

for (int i = 0; i < arr.length; i++)

System.out.println(arr[i]);

System.out.println();

}

public static void main(String args[]) {

testDefault();

testChinaLocale();

testDefaultLocale();

}

}

输出结果：

刘六

张三

李四

王五

李四

刘六

王五

张三

李四

刘六

王五

张三

看来Java还不是那么差嘛。至于那位老兄，估计是缺省的Locale有问题。

下面是java.net上Google到的对字符串中的字符按照拼音排序的测试代码：
import java.util.*;
import java.io.*;
import java.text.*;
public class CharSort implements Comparator{
java.text.RuleBasedCollator collator; // you can set your rules for the instance "collator"
CharSort(){
collator = (RuleBasedCollator)java.text.Collator.getInstance(java.util.Locale.CHINA);//try testing various locales
}

public void doSort(String str) throws java.io.IOException{
java.text.CollationKey[] keys = new java.text.CollationKey[str.length()];
for(int i=0;i<keys.length;i++){
keys[i] = collator.getCollationKey(str.substring(i,i+1));
}
java.util.Arrays.sort(keys, this);

BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(new FileOutputStream("cjk.txt"), "UTF8"));
for(int i=0;i<keys.length;i++){
bw.write(keys[i].getSourceString());
}
bw.newLine();
bw.close();
}

public int compare(Object c1, Object c2) throws IllegalArgumentException{
if((c1 instanceof CollationKey) &&(c2 instanceof CollationKey)){
return collator.compare(((CollationKey)c1).getSourceString(), ((CollationKey)c2).getSourceString());
}
else throw new IllegalArgumentException();
}

public boolean equals(Object c1, Object c2){
if(this.compare(c1,c2)==0) return true;
else return false;
}

public static void main(String[] args) throws java.lang.Exception{
CharSort chSort = new CharSort();
String str = " ÎÒ¾õµÃÎÒÍê³ÉÕâ¸öûÓõ½Ê²Ã´¹¤¾ß";
chSort.doSort(str);
//System.out.println(str);

String[] arr = {"ÕÂÈý", "Àï˹", "ÍõÎå"};
java.util.Arrays.sort(arr, new CharSort());
for (int i = 0; i < arr.length; i++)
System.out.println(arr[i]);

}
}

转载自： http://hi.baidu.com/luyanlong1/blog/item/2c31b51d938b79ecae5133fc.html