Java CSV String Create getCSV(Collection values)

Description

get CSV string from the collections.

License

Open Source License

Parameter

Parameter	Description
values	Collection

Return

StringBuffer

Declaration

public static String getCSV(Collection<?> values) 

Method Source Code

//package com.java2s;

import java.util.Collection;
import java.util.Iterator;

public class Main {
    public static final String CSV_SEPARATOR = ",";

    /**/*from  w w  w .  j  a  va 2  s .c o m*/
     * get CSV string from the collections. use comma as separator. blank items
     * will be skipped.
     * 
     * @param values Collection
     * @return StringBuffer
     */
    public static String getCSV(Collection<?> values) {
        return getCSV(values, CSV_SEPARATOR, true);
    }

    public static String getCSV(Collection<?> values, boolean warpSingleQutoa) {
        return getCSV(values, CSV_SEPARATOR, true, warpSingleQutoa).toString();
    }

    /**
     * convert the collection into CSV.
     * 
     * @param values
     * @param separators
     * @param ignoreBlank if true blank entries will be skipped
     * 
     * @return StringBuffer
     */
    public static String getCSV(Collection<?> values, String separators, boolean ignoreBlank) {
        return getCSV(values, separators, ignoreBlank, false).toString();
    }

    private static StringBuffer getCSV(Collection<?> values, String separators, boolean ignoreBlank,
            boolean warpSingleQutoa) {
        StringBuffer sb = new StringBuffer();
        if (values == null || values.size() == 0) {
            return sb;
        }

        for (Iterator<?> it = values.iterator(); it.hasNext();) {
            String value = it.next().toString();
            if (ignoreBlank && isBlank(value)) {
                continue;
            }

            if (sb.length() > 0) {
                sb.append(separators);
            }
            sb.append(warpSingleQutoa ? addSingleQuote(value) : value);
        }

        return sb;
    }

    public static boolean isBlank(Object str) {
        return str == null || str.toString().trim().length() == 0;
    }

    private static String addSingleQuote(String strSource) {
        if (strSource == null) {
            strSource = "";
        }
        return "'" + strSource + "'";
    }

    public static String trim(String str) {
        return str == null ? null : str.trim();
    }
}

Related

1. csv(String separator, String... elements)
2. getCSV(Collection coll)
3. getCsv(Collection collection)
4. getCSVPhrase(Collection objects)
5. toCSV(int[] a)
6. toCsv(Object[] arr, String format)