求帮助一个读取TXT文件并排序再输出的问题
一个discs.txt中的文本内容如下
Test_Iscicles Circle-Square-Triangle Ska NoLabel 1995 2 9,12
Elvis_Presley Jailhouse_Rock Rock RCA 1991 17 72,23
Massive_Attack Protection
Massive_Attack Blue_Lines
要求是设计一个程序先从txt中读取数据到array，然后运用冒泡排序法将演唱者（如果演唱者相同则按照专辑名称）按照字母顺序a到z排序，最后再将结果输出为一个新的txt文件，要求格式和第一个music的一样，结果类似于:
Elvis_Presley Jailhouse_Rock Rock RCA 1991 17 72,23
Massive_Attack Blue_Lines
Massive_Attack Protection
Test_Iscicles Circle-Square-Triangle Ska NoLabel 1995 2 9,12
在论坛查阅相关信息，运用BufferedReader已经将TXT数据读取，代码如下：
BufferedReader bf = new BufferedReader(new InputStreamReader(new FileInputStream("d:\\discs.txt")));
String line1 = bf.readLine();
String[] CD1 = line1.split(" ") ;
String line2 = bf.readLine();
String[] CD2 = line2.split(" ");
String line3 = bf.readLine();
String[] CD3 = line3.split(" ") ;
String line4 = bf.readLine();
String[] CD4 = line4.split(" ") ;
但是到了排序这一阶段却不知道怎么写了，小弟JAVA新手，还请各位大侠指点~~
[解决办法]
package com.monitor1394.test;import java.io.BufferedReader;import java.io.BufferedWriter;import java.io.FileNotFoundException;import java.io.FileReader;import java.io.FileWriter;import java.io.IOException;import java.util.ArrayList;import java.util.Collections;import java.util.List;import java.util.logging.Level;import java.util.logging.Logger;/** * * @author monitor * Created on 2011-1-6, 23:30:52 */public class NameSort { public NameSort(){ } /** * 从文件中获得名字列表 * @param file 存名字的文件 * @return 名字列表 * @throws FileNotFoundException * @throws IOException */ public static List<String> getNameList(String file) throws FileNotFoundException, IOException{ List<String> nameList=new ArrayList<String>(); BufferedReader br = new BufferedReader(new FileReader(file)); String name=null; while((name=br.readLine())!=null){ nameList.add(name); System.out.println(name); } if(br!=null)br.close(); return nameList; } /** * 将名字写到指定文件 * @param nameList 名字列表 * @param file 指定文件 * @throws IOException 文件操作异常 */ public static void exportNameToFile(List<String>nameList,String file) throws IOException{ BufferedWriter bw = new BufferedWriter(new FileWriter(file)); for(String name:nameList){ bw.write(name); bw.newLine(); } bw.flush(); bw.close(); } public static void main(String[] args){ try { List<String> nameList = getNameList("test.txt"); //排序 Collections.sort(nameList); exportNameToFile(nameList,"name.txt"); } catch (FileNotFoundException ex) { Logger.getLogger(NameSort.class.getName()).log(Level.SEVERE, null, ex); } catch (IOException ex) { Logger.getLogger(NameSort.class.getName()).log(Level.SEVERE, null, ex); } }}
[解决办法]
下面是我请两天写的名字排序的例子（统计同学的通讯方式时用的），名字排序我们一般是按拼音，但是你调用 Collections.sort(nameList);来排序汉字的话就不是那个顺序，我又给名字加了个拼音，排序的时候根据拼音来排：
package com.monitor1394.test;import java.util.ArrayList;import java.util.Collections;import java.util.List;class Name implements Comparable{ private String name; private String spell; public Name(String name,String spell){ this.name=name; this.spell=spell; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getSpell() { return spell; } public void setSpell(String spell) { this.spell = spell; } public int compareTo(Object o) { if(o instanceof Name){ Name n=(Name)o; return spell.compareTo(n.getSpell()); }else{ return 1; } }}public class Test { public static void main(String[] args) { List<Name> nameList=new ArrayList<Name>(); nameList.add(new Name("邓永枢","dengys")); nameList.add(new Name("陈济民","chenjm")); nameList.add(new Name("方镇云","fangzy")); nameList.add(new Name("刘彪","liub")); nameList.add(new Name("叶攀","yep")); nameList.add(new Name("劳高津","laogj")); nameList.add(new Name("黄品","huangp")); nameList.add(new Name("黄高栋","huanghgd")); nameList.add(new Name("温生文","wensm")); //...... Collections.sort(nameList); for(Name name:nameList){ System.out.println(name.getName()); } }}