Java List to String convertListToString(List itemList, String separator)

Description

convert List To String

License

Open Source License

Declaration

public static String convertListToString(List<String> itemList, String separator) 

Method Source Code

//package com.java2s;
/*/*from  w ww  .ja  va2s  . c o m*/
 * Copyright (C) 2006-2016 Talend Inc. - www.talend.com
 * 
 * This source code is available under agreement available at
 * %InstallDIR%\features\org.talend.rcp.branding.%PRODUCTNAME%\%PRODUCTNAME%license.txt
 * 
 * You should have received a copy of the agreement along with this program; if not, write to Talend SA 9 rue Pages
 * 92150 Suresnes, France
 */

import java.util.List;

public class Main {
    public static String convertListToString(List<String> itemList, String separator) {
        if (itemList == null) {
            return null;
        }
        StringBuilder result = new StringBuilder();
        for (int i = 0; i < itemList.size(); i++) {
            result.append((i > 0) ? separator : ""); //$NON-NLS-1$ 
            result.append(escape(itemList.get(i)));
        }
        return result.toString();
    }

    public static String convertListToString(List<String> itemList) {
        if (itemList == null) {
            return null;
        }
        StringBuilder result = new StringBuilder();
        for (int i = 0; i < itemList.size(); i++) {
            result.append((i > 0) ? ";" : ""); //$NON-NLS-1$ //$NON-NLS-2$ 
            result.append(escapeSemicolon(itemList.get(i)));
        }
        return result.toString();
    }

    public static String escape(String src) {
        int i;
        char j;
        StringBuffer tmp = new StringBuffer();
        tmp.ensureCapacity(src.length() * 6);

        for (i = 0; i < src.length(); i++) {

            j = src.charAt(i);

            if (Character.isDigit(j) || Character.isLowerCase(j) || Character.isUpperCase(j)) {
                tmp.append(j);
            } else if (j < 256) {
                tmp.append("%"); //$NON-NLS-1$
                if (j < 16) {
                    tmp.append("0"); //$NON-NLS-1$
                }
                tmp.append(Integer.toString(j, 16));
            } else {
                tmp.append("%u"); //$NON-NLS-1$
                tmp.append(Integer.toString(j, 16));
            }
        }
        return tmp.toString();
    }

    public static String escapeSemicolon(String src) {
        int i;
        char j;
        StringBuffer tmp = new StringBuffer();
        tmp.ensureCapacity(src.length() * 6);
        for (i = 0; i < src.length(); i++) {
            j = src.charAt(i);
            if (';' == j || '%' == j) {
                if (j < 256) {
                    tmp.append("%"); //$NON-NLS-1$
                    if (j < 16) {
                        tmp.append("0"); //$NON-NLS-1$
                    }
                    tmp.append(Integer.toString(j, 16));
                } else {
                    tmp.append("%u"); //$NON-NLS-1$
                    tmp.append(Integer.toString(j, 16));
                }
            } else {
                tmp.append(j);
            }
        }
        return tmp.toString();
    }
}

Related

1. convertListToString(List list, String delimiter, char encloser)
2. convertListToString(List list)
3. convertListToString(List