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com.xiaoleilu.hutool.json.XML Maven / Gradle / Ivy

package com.xiaoleilu.hutool.json;

import java.util.Iterator;

/**
 * 提供静态方法在XML和JSONObject之间转换
 * 
 * @author JSON.org
 */
public class XML {

	/** The Character '&'. */
	public static final Character AMP = '&';

	/** The Character '''. */
	public static final Character APOS = '\'';

	/** The Character '!'. */
	public static final Character BANG = '!';

	/** The Character '='. */
	public static final Character EQ = '=';

	/** The Character '>'. */
	public static final Character GT = '>';

	/** The Character '<'. */
	public static final Character LT = '<';

	/** The Character '?'. */
	public static final Character QUEST = '?';

	/** The Character '"'. */
	public static final Character QUOT = '"';

	/** The Character '/'. */
	public static final Character SLASH = '/';

	/**
	 * Replace special characters with XML escapes:
	 * 
	 * 
	 * & (ampersand) is replaced by &amp;
	 * < (less than) is replaced by &lt;
	 * > (greater than) is replaced by &gt;
	 * " (double quote) is replaced by &quot;
	 * 
* * @param string The string to be escaped. * @return The escaped string. */ public static String escape(String string) { StringBuilder sb = new StringBuilder(string.length()); for (int i = 0, length = string.length(); i < length; i++) { char c = string.charAt(i); switch (c) { case '&': sb.append("&"); break; case '<': sb.append("<"); break; case '>': sb.append(">"); break; case '"': sb.append("""); break; case '\'': sb.append("'"); break; default: sb.append(c); } } return sb.toString(); } /** * Throw an exception if the string contains whitespace. Whitespace is not allowed in tagNames and attributes. * * @param string A string. * @throws JSONException Thrown if the string contains whitespace or is empty. */ public static void noSpace(String string) throws JSONException { int i, length = string.length(); if (length == 0) { throw new JSONException("Empty string."); } for (i = 0; i < length; i += 1) { if (Character.isWhitespace(string.charAt(i))) { throw new JSONException("'" + string + "' contains a space character."); } } } /** * Scan the content following the named tag, attaching it to the context. * * @param x The XMLTokener containing the source string. * @param context The JSONObject that will include the new material. * @param name The tag name. * @return true if the close tag is processed. * @throws JSONException */ private static boolean parse(XMLTokener x, JSONObject context, String name, boolean keepStrings) throws JSONException { char c; int i; JSONObject jsonobject = null; String string; String tagName; Object token; // Test for and skip past these forms: // // // // // Report errors for these forms: // <> // <= // << token = x.nextToken(); // "); return false; } x.back(); } else if (c == '[') { token = x.nextToken(); if ("CDATA".equals(token)) { if (x.next() == '[') { string = x.nextCDATA(); if (string.length() > 0) { context.accumulate("content", string); } return false; } } throw x.syntaxError("Expected 'CDATA['"); } i = 1; do { token = x.nextMeta(); if (token == null) { throw x.syntaxError("Missing '>' after ' 0); return false; } else if (token == QUEST) { // "); return false; } else if (token == SLASH) { // Close tag if (x.nextToken() != GT) { throw x.syntaxError("Misshaped tag"); } if (jsonobject.size() > 0) { context.accumulate(tagName, jsonobject); } else { context.accumulate(tagName, ""); } return false; } else if (token == GT) { // Content, between <...> and for (;;) { token = x.nextContent(); if (token == null) { if (tagName != null) { throw x.syntaxError("Unclosed tag " + tagName); } return false; } else if (token instanceof String) { string = (String) token; if (string.length() > 0) { jsonobject.accumulate("content", keepStrings ? token : InternalJSONUtil.stringToValue(string)); } } else if (token == LT) { // Nested element if (parse(x, jsonobject, tagName, keepStrings)) { if (jsonobject.size() == 0) { context.accumulate(tagName, ""); } else if (jsonobject.size() == 1 && jsonobject.get("content") != null) { context.accumulate(tagName, jsonobject.get("content")); } else { context.accumulate(tagName, jsonobject); } return false; } } } } else { throw x.syntaxError("Misshaped tag"); } } } } /** * 转换XML为JSONObject * 转换过程中一些信息可能会丢失,JSON中无法区分节点和属性,相同的节点将被处理为JSONArray。 * Content text may be placed in a "content" member. Comments, prologs, DTDs, and <[ [ ]]> are ignored. * * @param string The source string. * @return A JSONObject containing the structured data from the XML string. * @throws JSONException Thrown if there is an errors while parsing the string */ public static JSONObject toJSONObject(String string) throws JSONException { return toJSONObject(string, false); } /** * 转换XML为JSONObject * 转换过程中一些信息可能会丢失,JSON中无法区分节点和属性,相同的节点将被处理为JSONArray。 * Content text may be placed in a "content" member. Comments, prologs, DTDs, and <[ [ ]]> are ignored. * All values are converted as strings, for 1, 01, 29.0 will not be coerced to numbers but will instead be the exact value as seen in the XML document. * * @param string The source string. * @param keepStrings If true, then values will not be coerced into boolean or numeric values and will instead be left as strings * @return A JSONObject containing the structured data from the XML string. * @throws JSONException Thrown if there is an errors while parsing the string */ public static JSONObject toJSONObject(String string, boolean keepStrings) throws JSONException { JSONObject jo = new JSONObject(); XMLTokener x = new XMLTokener(string); while (x.more() && x.skipPast("<")) { parse(x, jo, null, keepStrings); } return jo; } /** * 转换XML为JSONObject * Convert a JSONObject into a well-formed, element-normal XML string. * * @param object A JSONObject. * @return A string. * @throws JSONException Thrown if there is an error parsing the string */ public static String toString(Object object) throws JSONException { return toString(object, null); } /** * 转换XML为JSONObject * Convert a JSONObject into a well-formed, element-normal XML string. * * @param object A JSONObject. * @param tagName The optional name of the enclosing tag. * @return A string. * @throws JSONException Thrown if there is an error parsing the string */ public static String toString(Object object, String tagName) throws JSONException { StringBuilder sb = new StringBuilder(); JSONArray ja; JSONObject jo; String key; Iterator keys; String string; Object value; if (object instanceof JSONObject) { // Emit if (tagName != null) { sb.append('<'); sb.append(tagName); sb.append('>'); } // Loop thru the keys. jo = (JSONObject) object; keys = jo.keySet().iterator(); while (keys.hasNext()) { key = keys.next(); value = jo.get(key); if (value == null) { value = ""; } else if (value.getClass().isArray()) { value = new JSONArray(value); } string = value instanceof String ? (String) value : null; // Emit content in body if ("content".equals(key)) { if (value instanceof JSONArray) { ja = (JSONArray) value; int i = 0; for (Object val : ja) { if (i > 0) { sb.append('\n'); } sb.append(escape(val.toString())); i++; } } else { sb.append(escape(value.toString())); } // Emit an array of similar keys } else if (value instanceof JSONArray) { ja = (JSONArray) value; for (Object val : ja) { if (val instanceof JSONArray) { sb.append('<'); sb.append(key); sb.append('>'); sb.append(toString(val)); sb.append("'); } else { sb.append(toString(val, key)); } } } else if ("".equals(value)) { sb.append('<'); sb.append(key); sb.append("/>"); // Emit a new tag } else { sb.append(toString(value, key)); } } if (tagName != null) { // Emit the close tag sb.append("'); } return sb.toString(); } if (object != null) { if (object.getClass().isArray()) { object = new JSONArray(object); } if (object instanceof JSONArray) { ja = (JSONArray) object; for (Object val : ja) { // XML does not have good support for arrays. If an array // appears in a place where XML is lacking, synthesize an // element. sb.append(toString(val, tagName == null ? "array" : tagName)); } return sb.toString(); } } string = (object == null) ? "null" : escape(object.toString()); return (tagName == null) ? "\"" + string + "\"" : (string.length() == 0) ? "<" + tagName + "/>" : "<" + tagName + ">" + string + ""; } }




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