Java 替换字符串间的分隔符

1.将文本 a,b,aaaa,fdsfdsf,"fdsfdsafdsf,fafas,&&fafas,  ",sf//:fdsfa 中的逗号改为用(:ptth)分隔，其中双引号内的逗号不变

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;


public class Substitute {
	public static void parse(File file, File fileOut)  
    {  
        BufferedReader br = null; 
        BufferedWriter bw = null;
        try {  
            br = new BufferedReader(new FileReader(file));
            bw = new BufferedWriter(new FileWriter(fileOut));
            String line = "";  
            String subStr1 = "";
            String subStr2 = "";
            String lineAfter = "";
            while((line=br.readLine()) != null)  
            {  
                line = line.trim();
                int index1 = line.indexOf("\"");
                subStr1 = line.substring(0,index1);
                int index2 = line.lastIndexOf("\"");
                subStr2 = line.substring(index2+1, line.length());
                subStr1 = subStr1.replace("," ,"(:ptth)");
                subStr2 = subStr2.replace("," ,"(:ptth)");
                System.out.println(subStr1 + line.substring(index1,index2+1) + subStr2);
                lineAfter = subStr1 + line.substring(index1,index2+1) + subStr2;
                bw.write(lineAfter);
                bw.newLine();
                bw.flush();
                
                
            } 
        } catch (FileNotFoundException e) {  
            e.printStackTrace();  
        } catch (IOException e) {  
            e.printStackTrace();  
        } finally  
        {  
            if(br != null)  
            {  
                try {  
                    br.close();  
                    br = null;  
                } catch (IOException e) {  
                    e.printStackTrace();  
                }  
                  
            }  
            if (bw != null) 
            {
            	try {
            		bw.close();
            		bw = null;
            	} catch (Exception e) {
					e.printStackTrace();
				}
            }
        }  
    }  
	
	public static void main(String[] args) {
		File fileIn = new File("d:\\testSub.txt");
		File fileOut = new File("d:\\out.txt");
		parse(fileIn, fileOut);
	}
}

2.将文本a,b,aaaa,fdsfdsf,"fdsfdsafdsf,fafas,&&fafas,  ",s,"  aa",f//:fdsfa中的逗号改为用(:ptth)分隔，其中双引号内的逗号不变

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;


public class Substitute2 {
	public static void parse(File file, File fileOut)  
    {  
        BufferedReader br = null; 
        BufferedWriter bw = null;
        try {  
            br = new BufferedReader(new FileReader(file));
            bw = new BufferedWriter(new FileWriter(fileOut));
            String line = "";  
            String subStr1 = "";
            String subStr2 = "";
            String subStr3 = "";
            String subStr4 = "";
            String subStr5 = "";
            String lineAfter = "";
            while((line=br.readLine()) != null)  
            {  
                line = line.trim();
                int index1 = line.indexOf("\"");
                int index2 = line.indexOf("\"", index1+1);
                int index3 = line.indexOf("\"", index2+1);
                int index4 = line.indexOf("\"", index3+1);
                subStr1 = line.substring(0,index1);
                subStr2 = line.substring(index1, index2+1);
                subStr3 = line.substring(index2+1, index3);
                subStr4 = line.substring(index3, index4+1);
                subStr5 = line.substring(index4+1, line.length());
                
//                subStr1 = subStr1.replace("," ,"(:ptth)");
//                subStr2 = subStr2.replace("," ,"(:ptth)");
                
                subStr1 = subStr1.replace("," ,"(:ptth)");
                subStr3 = subStr3.replace("," ,"(:ptth)");
                subStr5 = subStr5.replace("," ,"(:ptth)");
                
                System.out.println(subStr1 + subStr2 + subStr3 + subStr4 + subStr5);
                lineAfter = subStr1 + subStr2 + subStr3 + subStr4 + subStr5;
                bw.write(lineAfter);
                bw.newLine();
                bw.flush();
                
                
            } 
        } catch (FileNotFoundException e) {  
            e.printStackTrace();  
        } catch (IOException e) {  
            e.printStackTrace();  
        } finally  
        {  
            if(br != null)  
            {  
                try {  
                    br.close();  
                    br = null;  
                } catch (IOException e) {  
                    e.printStackTrace();  
                }  
                  
            }  
            if (bw != null) 
            {
            	try {
            		bw.close();
            		bw = null;
            	} catch (Exception e) {
					e.printStackTrace();
				}
            }
        }  
    }  
	
	public static void main(String[] args) {
		File fileIn = new File("d:\\testSql.txt");
		File fileOut = new File("d:\\out3.txt");
		parse(fileIn, fileOut);
	}
}