relative Path - Java File Path IO

Java examples for File Path IO:Path

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Description

relative Path

Demo Code


//package com.java2s;

public class Main {
    public static String relativePath(String absolutePath, String relativeTo) {
        String[] absoluteDirectories = absolutePath.split("\\\\");
        String[] relativeDirectories = relativeTo.split("\\\\");

        //Get the shortest of the two paths
        int length = absoluteDirectories.length < relativeDirectories.length ? absoluteDirectories.length
                : relativeDirectories.length;

        //Use to determine where in the loop we exited
        int lastCommonRoot = -1;
        int index;

        //Find common root
        for (index = 0; index < length; index++) {
            if (absoluteDirectories[index]
                    .equals(relativeDirectories[index])) {
                lastCommonRoot = index;//from  ww w.j  a  v a 2s . c o  m
            } else {
                break;
            }
        }

        //Build up the relative path
        StringBuilder relativePath = new StringBuilder();

        //Add on the ..
        for (index = lastCommonRoot + 1; index < absoluteDirectories.length; index++) {
            if (absoluteDirectories[index].length() > 0) {
                relativePath.append("..\\");
            }
        }

        //Add on the folders
        for (index = lastCommonRoot + 1; index < relativeDirectories.length - 1; index++) {
            relativePath.append(relativeDirectories[index]).append("\\");
        }

        relativePath
                .append(relativeDirectories[relativeDirectories.length - 1]);

        return relativePath.toString();
    }
}

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