Serialize array in java and unserialize in php

[chintan.vyas89]

Hello,

Basically I want to serialize the array such that I can unserialize it in php. I want to send this array via webservice and consume it in php and unserialize to get back that array. Any algorithm to make structure of array serialized like php serialize ?

Thanks,
Chintan Vyas

[travishein]

I remember making a utility a while ago that handled general purpose serialization of Java things into a PHP serialization kind of string. I had read a reference on PHP serialized syntax. It is a delimited string expression similar to JSON.

This utility doesn't handle Arrays, e.g String[]. I guess at the time I didn't need arrays. But it does handle List objects. I would guess the PHP serialized form of a Java List and a Java Array would be the same notation anyway, so maybe you can adapt this, or just ship it a list of items

// created on 2009-10-24

import java.util.Iterator;
import java.util.List;
import java.util.Map;

/**
 * A utility to convert Java objects into PHP serialized strings.

 * <table border="1" style="border-collapse: collapse;">
 * <caption>PHP's Serialization Format</caption>
 * <thead>
 * <tr><th>Type</th><th>serialized</th><th>Example</th></tr>
 * </thead>
 * <tbody>
 * <tr><td>NULL</td><td>N;</td><td>N;</td></tr>
 * <tr><td>Integer</td><td>i:$data;</td><td>i:123;</td></tr>
 * <tr><td>Double</td><td>d:$data;</td><td>d:1.23;</td></tr>
 * <tr><td>Float</td><td>d:$data;</td><td>d:1.23;</td></tr>
 * <tr><td>Boolean</td><td>b:$bool_value;</td><td>b:1;</td></tr>
 * <tr><td>String</td><td>s:$data_length:"$data";</td><td>s:5:"Hello"</td></tr>
 * <tr><td valign="top">Array</td><td>a:$key_count:{$key;$value}<br/> $value can be any data type</td><td valign="top">a:1:{i:1;i:2}</td></tr>   
 * </table>
 * @author thein
 *
 */
public class PhpSerialize
{
    
    /**
     * Converts a Java integer to PHP serialized notation.
     * @param javaInt
     * @return
     */
    public static String serialize(Integer javaInt) {
        if (javaInt == null) {
            return "N;";
        }
        return "i:" + javaInt.toString() + ";";
    }
    
    /**
     * Converts a java double to PHP serialized notation.
     * @param javaDouble
     * @return
     */
    public static String serialize(Double javaDouble) {
        if (javaDouble == null) {
            return "N;";
        }
        return "d:" + javaDouble.toString() + ";";
    }
    
    public static String serialize(Boolean javaBoolean) {
        if (javaBoolean == null) {
            return "N;";
        }
        return "b:" + (javaBoolean.equals(Boolean.TRUE) ? 1 : 0) + ";";
    }
    
    /**
     * Converts a Java string into a PHP serialized notation.
     * @param javaString
     * @return
     */
    public static String serialize(String javaString) {
        if ( javaString == null) {
            return "N;";
        }
        return "s:" + javaString.length() + ":\"" + javaString + "\";";
    }
    
    /**
     * Converts a Java list into a PHP serialized notation
     * @param aList
     * @return
     */
    public static String serialize(List<Object> aList) {
        if (aList == null) {
            return "N;";
        }
        StringBuffer buf = new StringBuffer();
        buf.append("a:").append(aList.size()).append(":{");
        int offset = 0;
        for (Iterator<Object> it = aList.iterator(); it.hasNext();) {
            buf.append(serialize(new Integer(offset ++)));
            Object value = it.next();
            buf.append(serialize(value));            
        }
        buf.append("};");
        return buf.toString();
    }
    
    public static String serialize(Map<Object,Object> aMap) {
        if (aMap == null) {
            return "N;";
        }
        StringBuffer buf = new StringBuffer();
        buf.append("a:").append(aMap.size()).append(":{");
        for (Iterator<Object> it = aMap.keySet().iterator(); it.hasNext();) {
            Object key = it.next();
            buf.append(serialize(key));
            Object value = aMap.get(key);
            buf.append(serialize(value));
        }
        buf.append("};");
        return buf.toString();
    }
    
    
    public static String serialize(Object value) {
        if (value == null) {
            return "N;";
        }
        if (value instanceof Integer) {
            return serialize((Integer) value);
        }
        
        if (value instanceof Double) {
            return serialize((Double) value);
        }
        
        if (value instanceof Boolean) {
            return serialize((Boolean) value);            
        }
        
        if (value instanceof List<?>) {
            return serialize((List<?>) value);
        }
        
        if (value instanceof Map<?,?>) {
            return serialize((Map<?,?>) value);
        }
        
        return serialize((String) value);
        
    }
}

[chintan.vyas89]

I remember making a utility a while ago that handled general purpose serialization of Java things into a PHP serialization kind of string. I had read a reference on PHP serialized syntax. It is a delimited string expression similar to JSON.

This utility doesn't handle Arrays, e.g String[]. I guess at the time I didn't need arrays. But it does handle List objects. I would guess the PHP serialized form of a Java List and a Java Array would be the same notation anyway, so maybe you can adapt this, or just ship it a list of items

// created on 2009-10-24

import java.util.Iterator;
import java.util.List;
import java.util.Map;

/**
 * A utility to convert Java objects into PHP serialized strings.

 * <table border="1" style="border-collapse: collapse;">
 * <caption>PHP's Serialization Format</caption>
 * <thead>
 * <tr><th>Type</th><th>serialized</th><th>Example</th></tr>
 * </thead>
 * <tbody>
 * <tr><td>NULL</td><td>N;</td><td>N;</td></tr>
 * <tr><td>Integer</td><td>i:$data;</td><td>i:123;</td></tr>
 * <tr><td>Double</td><td>d:$data;</td><td>d:1.23;</td></tr>
 * <tr><td>Float</td><td>d:$data;</td><td>d:1.23;</td></tr>
 * <tr><td>Boolean</td><td>b:$bool_value;</td><td>b:1;</td></tr>
 * <tr><td>String</td><td>s:$data_length:"$data";</td><td>s:5:"Hello"</td></tr>
 * <tr><td valign="top">Array</td><td>a:$key_count:{$key;$value}<br/> $value can be any data type</td><td valign="top">a:1:{i:1;i:2}</td></tr>   
 * </table>
 * @author thein
 *
 */
public class PhpSerialize
{
    
    /**
     * Converts a Java integer to PHP serialized notation.
     * @param javaInt
     * @return
     */
    public static String serialize(Integer javaInt) {
        if (javaInt == null) {
            return "N;";
        }
        return "i:" + javaInt.toString() + ";";
    }
    
    /**
     * Converts a java double to PHP serialized notation.
     * @param javaDouble
     * @return
     */
    public static String serialize(Double javaDouble) {
        if (javaDouble == null) {
            return "N;";
        }
        return "d:" + javaDouble.toString() + ";";
    }
    
    public static String serialize(Boolean javaBoolean) {
        if (javaBoolean == null) {
            return "N;";
        }
        return "b:" + (javaBoolean.equals(Boolean.TRUE) ? 1 : 0) + ";";
    }
    
    /**
     * Converts a Java string into a PHP serialized notation.
     * @param javaString
     * @return
     */
    public static String serialize(String javaString) {
        if ( javaString == null) {
            return "N;";
        }
        return "s:" + javaString.length() + ":\"" + javaString + "\";";
    }
    
    /**
     * Converts a Java list into a PHP serialized notation
     * @param aList
     * @return
     */
    public static String serialize(List<Object> aList) {
        if (aList == null) {
            return "N;";
        }
        StringBuffer buf = new StringBuffer();
        buf.append("a:").append(aList.size()).append(":{");
        int offset = 0;
        for (Iterator<Object> it = aList.iterator(); it.hasNext();) {
            buf.append(serialize(new Integer(offset ++)));
            Object value = it.next();
            buf.append(serialize(value));            
        }
        buf.append("};");
        return buf.toString();
    }
    
    public static String serialize(Map<Object,Object> aMap) {
        if (aMap == null) {
            return "N;";
        }
        StringBuffer buf = new StringBuffer();
        buf.append("a:").append(aMap.size()).append(":{");
        for (Iterator<Object> it = aMap.keySet().iterator(); it.hasNext();) {
            Object key = it.next();
            buf.append(serialize(key));
            Object value = aMap.get(key);
            buf.append(serialize(value));
        }
        buf.append("};");
        return buf.toString();
    }
    
    
    public static String serialize(Object value) {
        if (value == null) {
            return "N;";
        }
        if (value instanceof Integer) {
            return serialize((Integer) value);
        }
        
        if (value instanceof Double) {
            return serialize((Double) value);
        }
        
        if (value instanceof Boolean) {
            return serialize((Boolean) value);            
        }
        
        if (value instanceof List<?>) {
            return serialize((List<?>) value);
        }
        
        if (value instanceof Map<?,?>) {
            return serialize((Map<?,?>) value);
        }
        
        return serialize((String) value);
        
    }
}

Thanks travishein !!!
This snippet really helped me. I have to modify according to my req.. Thanks again for your quick reply.

Regards,
Chintan Vyas.