java中的重复分隔符与数组的损坏消息

Posted 2023-02-26

【中文标题】java中的重复分隔符与数组的损坏消息

【英文标题】：Recurring Delimiter in java with broken message to an array

【发布时间】：2017-09-10 07:58:51

【问题描述】：

我有一个字符串：

String received = "28,gZrate:-1.48,
gXrate:9.10,gYrate:-0.69,gZrate:-1.50,        
gXrate:9.22,gYrate:0.54,gZrate:-1.67,     
gXrate:9.20,gYrate:-2.40,gZrate:-1.65,gXrate:9.02" ; 

我需要这个字符串在这样的数组中：

["gXrate:9.10,gYrate:-0.69,gZrate:-1.50","gXrate:9.22,gYrate:0.54,gZrate:-1.67","gXrate:9.20,gYrate:-2.40,gZrate:-1.65"]

忽略接收到的字符串开头和结尾的断线部分 即

28,gZrate:-1.48

gXrate:9.02 ; 

还要注意有时字符串可能不会被破坏。

【参考方案1】：

String received = "28,gZrate:-1.48,gXrate:9.10,gYrate:-0.69,gZrate:-1.50,";
       received += "gXrate:9.22,gYrate:0.54,gZrate:-1.67,";
       received += "gXrate:9.20,gYrate:-2.40,gZrate:-1.65,gXrate:9.02";
String pattern = "\\(.*?)\\,?";
StringBuilder sb = new StringBuilder("[");
boolean first = true;

Pattern r = Pattern.compile(pattern);
Matcher m = r.matcher(received);
while (m.find()) 
    if (!first) 
        sb.append(",");
    
    first = false;
    sb.append("\"" + m.group(1) + "\"");

sb.append("]");
System.out.println(sb);

输出：

["gXrate:9.10,gYrate:-0.69,gZrate:-1.50","gXrate:9.22,gYrate:0.54,gZrate:-1.67","gXrate:9.20,gYrate:-2.40,gZrate:-1.65"]

这是一个演示，它表明上述代码适用于破碎和平衡的情况：

Rextester

【参考方案2】：

你可以使用正则表达式：

import java.util.regex.*;
import java.util.Arrays;
import java.util.ArrayList;

public class Main 
  public static void main (String[] args) 
    ArrayList<String> nonBrokenStrings = new ArrayList<String>();
    String received = "28,gZrate:-1.48,gXrate:9.10,gYrate:-0.69,gZrate:-1.50, gXrate:9.22,gYrate:0.54,gZrate:-1.67, gXrate:9.20,gYrate:-2.40,gZrate:-1.65,gXrate:9.02";
    Matcher m = Pattern.compile("\\([^]+)\\").matcher(received);
    while(m.find()) 
      nonBrokenStrings.add(m.group(1));
    
    String[] nonBrokenStringsArr = nonBrokenStrings.toArray(new String[nonBrokenStrings.size()]);
    System.out.print(Arrays.toString(nonBrokenStringsArr));
  

输出：

[gXrate:9.10,gYrate:-0.69,gZrate:-1.50, gXrate:9.22,gYrate:0.54,gZrate:-1.67, gXrate:9.20,gYrate:-2.40,gZrate:-1.65] 

试试here!

【参考方案3】：

public static String formatToArrayStr(String input)
    String regex="\\([^]+)\\";
    Matcher m=Pattern.compile(regex).matcher(input);
    StringBuilder result=new StringBuilder().append("[");
    while(m.find())
        result.append("\"").append(m.group(1)).append("\"").append(",");
           
    result=(result.lastIndexOf(",")>=0?result.deleteCharAt(result.length()-1):result).append("]");
    return result.toString();

也可以这样写：

public static String formatToArrayStr(String input)
    Matcher m=Pattern.compile("\\([^]+)\\").matcher(input);
    List<String> result=new ArrayList<String>();
    while(m.find())
        result.add("\""+m.group(1)+"\"");
           
    return result.toString();

输出

["gXrate:9.10,gYrate:-0.69,gZrate:-1.50","gXrate:9.22,gYrate:0.54,gZrate:-1.67","gXrate:9.20,gYrate:-2.40,gZrate:-1.65"]