java 反序列化PHP序列化字符串

import java.util.HashMap;

/**

* Since i have to declare the return type of a function, and i have no idea

* ahead of time what value is being unserialized, this helper class is a hack

* so that i can return any variable type as PHPValue and deal with it later.

*

* @author Scott Hurring [scott at hurring dot com]

* @version v0.01a ALPHA!!

* @licence GNU GPL

*/

public class PHPValue {

/**

* The raw object given to us by unserialize()

*/

private Object obj = null;

private HashMap hobj = new HashMap();

/**

* The toString() value of the Object passed into PHPValue

*/

public String value = "";

/**

* Is the PHPValue one of the following?

*/

public boolean isNull = false;

public boolean isInteger = false;

public boolean isDouble = false;

public boolean isString = false;

public boolean isHashMap = false;

/**

* Pass in an object, and PHPValue: 1. Attempts to try and figure out what

* it is 2. Stringifies it 3. Sets a boolean flag to let everyone know what

* we think it is.

*

*/

public PHPValue(Object o) {

obj = o;

if (obj == null) {

isNull = true;

value = "";

} else if (obj.getClass().toString().equals("class java.lang.Integer")) {

isInteger = true;

value = ((Integer) obj).toString();

} else if (obj.getClass().toString().equals("class java.lang.Double")) {

isDouble = true;

value = ((Double) obj).toString();

} else if (obj.getClass().toString().equals("class java.util.HashMap")) {

isHashMap = true;

value = obj.toString();

} else if (obj.getClass().toString().equals("class java.lang.String")) {

isString = true;

value = obj.toString();

} else {

value = obj.toString();

}

// debug

if (obj != null) {

//System.out.println("PHPValue: '" + obj.getClass() + "' = " + value);

}

}

/**

* Convert PHPValue into a double

*

* @return double

*/

public double toDouble() {

if (isDouble) {

return Double.parseDouble(value);

} else {

return 0.0;

}

}

/**

* Convert PHPValue into an integer

*

* @return int

*/

public int toInteger() {

if (isInteger) {

return Integer.parseInt(value);

} else {

return 0;

}

}

/**

* PHPValue's string-ified value

*

* @return String

*/

public String toString() {

if (!isNull) {

return value;

} else {

return "";

}

}

/**

* Cast PHPValue into HashMap

*

* @return HashMap

*/

public HashMap toHashMap() {

return (HashMap) obj;

}

/**

* Return the raw object

*

* @return double

*/

public Object toObject() {

return obj;

}

}

import java.util.regex.*;

import java.util.*;

public class PHPSerialize {

/**

* To store partially decomposed serialized string

*/

private StringBuffer sb;

/** Creates a new instance of phpserialize */

public PHPSerialize() {

}

/**

* Unserializes a single value into a PHPValue

* @param String

* s String to unserialize

* @return PHPValue

*/

public PHPValue unserialize(String s) {

sb = new StringBuffer(s);

PHPValue phpvalue = getNext();

//println("value = " + phpvalue.toString());

return phpvalue;

}

/**

* Get the next token in the serialized string

*

*

*/

private PHPValue getNext() {

// println("getNext = "+ sb.toString());

PHPValue phpvalue;

Object value = new Object();

// Current character

String c;

// What type of value is this

String what = "";

// Consume & throw away characters

int consumeChars = 0;

// Length of the string/array

int len = -1;

// Buffer to read in string

StringBuffer tmp = new StringBuffer();

// length of sb is constantly changing.

while (sb.length() > 0) {

c = sb.substring(0, 1);

sb = sb.deleteCharAt(0);

// println(c +"\twhat="+what+"\ttmp="+tmp.toString());

// Ignore chars

if (consumeChars-- > 0) {

continue;

}

/**

* This is a hackish pseudo state machine 'what' is the state

*

*/

if (what.equals("array_length")) {

if (c.equals(":")) {

len = Integer.parseInt(tmp.toString());

tmp.delete(0, tmp.length());

// println("\tarray_length="+ len);

what = "array_value";

}

if (len == -1) {

tmp.append(c);

}

} else if (what.equals("array_value")) {

// value = new PHPValue( new HashMap() );

HashMap hash = new HashMap();

for (int i = 0; i < len; i++) {

PHPValue hashKey = getNext();

PHPValue hashValue = getNext();

// Force the keys of the HashMap to be type String

hash.put(hashKey.value, hashValue);

}

value = hash;

// return new PHPValue(value);

what = "set";

} else if (what.equals("string_length")) {

if (c.equals(":")) {

len = Integer.parseInt(tmp.toString());

tmp.delete(0, tmp.length());

// println("\tstring_length="+ len);

what = "string_value";

consumeChars = 1;

}

if (len == -1) {

tmp.append(c);

}

} else if (what.equals("string_value")) {

if (len-- > 0) {

tmp.append(c);

} else {

value = tmp.toString();

what = "set";

// println("\tstring_value="+ value);

}

}

else if (what.equals("integer")) {

if (c.equals(";")) {

value = tmp.toString();

what = "set";

} else {

tmp.append(c);

}

} else if (what.equals("double")) {

if (c.equals(";")) {

value = tmp.toString();

what = "set";

} else {

tmp.append(c);

}

} else if (what.equals("null")) {

if (c.equals(";")) {

value = null;

what = "set";

} else {

// Bad

}

}

// What kind of variable is coming up next

else {

if (c.equals("a")) {

what = "array_length";

} else if (c.equals("s")) {

what = "string_length";

} else if (c.equals("i")) {

what = "integer";

} else if (c.equals("d")) {

what = "double";

} else if (c.equals("n")) {

what = "null";

// do NOT consume the next char ";"

continue;

} else {

continue;

}

// Consume the ":" after variable type declaration

consumeChars = 1;

continue;

}

if (what.equals("set")) {

return new PHPValue(value);

}

}

return new PHPValue(value);

}

/********************************************************************/

public static void main(String args[]) {

//test();

String php = "a:1:{s:3:\"tel\";s:0:\"\";}";

//String php = "a:2:{s:11:\"peopleprice\";s:3:\"120\";s:10:\"childprice\";s:2:\"60\";}";

//String php = "a:2:{s:11:\"peopleprice\";s:3:\"300\";s:10:\"childprice\";s:3:\"100\";}";

//String php ="a:1:{s:3:\"tel\";s:12:\"0717-0351212\";}";

PHPSerialize p = new PHPSerialize();

PHPValue c = p.unserialize(php);

System.out.println(c.toHashMap().toString());

}

}