{"id":945,"date":"2018-09-17T18:42:40","date_gmt":"2018-09-17T09:42:40","guid":{"rendered":"https:\/\/chat-messenger.com\/?p=945"},"modified":"2018-12-23T01:52:55","modified_gmt":"2018-12-22T16:52:55","slug":"xmlencoder-writeobject","status":"publish","type":"post","link":"https:\/\/chat-messenger.com\/vi\/blog\/java\/doi-tuong-viet-xmlencode","title":{"rendered":"L\u01b0u \u0111\u1ed1i t\u01b0\u1ee3ng b\u1eb1ng Java XMLEncode"},"content":{"rendered":"<h2 class=\"common_title\"><a name=\"0\">Java <strong>B\u1ed9 m\u00e3 h\u00f3a XML<\/strong>L\u01b0u \u0111\u1ed1i t\u01b0\u1ee3ng v\u1edbi,<strong>B\u1ed9 gi\u1ea3i m\u00e3 XML<\/strong>\u0111\u01b0\u1ee3c kh\u00f4i ph\u1ee5c b\u1eb1ng<\/a><\/h2>\n<p>\n<strong>Java<\/strong>\u0111\u1ed1i t\u01b0\u1ee3ng v\u1edbi<strong>\u0111\u1ecbnh d\u1ea1ng XML<\/strong>Gi\u1edbi thi\u1ec7u m\u1ed9t ch\u01b0\u01a1ng tr\u00ecnh m\u1eabu \u0111\u1ec3 l\u01b0u v\u1edbi .<br \/>\n\u0110\u1ed1i v\u1edbi \u0111\u1ea7u ra XML<strong>java.beans.XMLEncoding<\/strong>S\u1eed d\u1ee5ng.<br \/>\nC\u0169ng<strong>java.beans.XMLDecode<\/strong>Ch\u00fang t\u00f4i c\u0169ng s\u1ebd gi\u1edbi thi\u1ec7u m\u1ed9t ch\u01b0\u01a1ng tr\u00ecnh m\u1eabu s\u1eed d\u1ee5ng ch\u01b0\u01a1ng tr\u00ecnh n\u00e0y \u0111\u1ec3 kh\u00f4i ph\u1ee5c c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng \u0111\u00e3 l\u01b0u.<\/p>\n<p><script type=\"text\/javascript\" src=\"https:\/\/chat-messenger.com\/js\/common.js?dd12sssas2223\" charset=\"UTF-8\"><\/script><br \/>\n<script type=\"text\/javascript\"> writePR(); <\/script><\/p>\n<h2 class=\"common_title\"><a name=\"1\">ch\u01b0\u01a1ng tr\u00ecnh m\u1eabu<\/a><\/h2>\n<ul>\n<li>C\u00e1c tr\u01b0\u1eddng \u0111\u01b0\u1ee3c khai b\u00e1o l\u00e0 ri\u00eang t\u01b0 s\u1ebd \u0111\u01b0\u1ee3c l\u01b0u khi b\u1ea1n x\u00e1c \u0111\u1ecbnh ph\u01b0\u01a1ng th\u1ee9c getter v\u00e0 setter.<\/li>\n<li>Ch\u1ec9 nh\u1eefng thay \u0111\u1ed5i \u0111\u1ed1i v\u1edbi c\u00e1c bi\u1ebfn m\u1edbi \u0111\u01b0\u1ee3c l\u01b0u v\u00e0o t\u1ec7p XML.<\/li>\n<li>B\u1ea1n c\u0169ng c\u00f3 th\u1ec3 ch\u1ec9 \u0111\u1ecbnh java.util.HashMap, java.util.ArrayList, v.v. l\u00e0m \u0111\u1ed1i t\u01b0\u1ee3ng c\u1ea7n l\u01b0u. \u0110i\u1ec1u n\u00e0y r\u1ea5t h\u1eefu \u00edch khi ch\u1ec9 c\u1ea7n l\u01b0u tr\u1ea1ng th\u00e1i c\u1ee7a m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng.<\/li>\n<\/ul>\n<p><textarea readonly=\"readonly\" style=\"font-size: 13px;height: 400px;\" class=\"src\" onclick=\"this.focus();this.select()\">\/**<br \/>\n * java.beans.XMLEncoder\u3092\u4f7f\u7528\u3057\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8[object]\u3092\u3001<br \/>\n * \u6307\u5b9a\u3057\u305f\u30d1\u30b9[path]\u306b\u3001XML\u30d5\u30a1\u30a4\u30eb\u3068\u3057\u3066\u4fdd\u5b58\u3057\u307e\u3059\u3002<br \/>\n * \u203b\u30aa\u30d6\u30b8\u30a7\u30af\u30c8[object]\u304cJavaBeans\u306e\u6163\u4f8b\u306b\u9069\u5408\u3057\u3066\u3044\u308b\u5834\u5408\u3001<br \/>\n * \u3000\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8\u306a\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u30c7\u30fc\u30bf\u3082\u4fdd\u5b58\u3067\u304d\u307e\u3059\u3002<br \/>\n * \u203b\u4fdd\u5b58\u3057\u305fXML\u30d5\u30a1\u30a4\u30eb\u306fjava.beans.XMLDecoder\u3067\u5fa9\u5143\u3059\u308b\u4e8b\u304c\u3067\u304d\u307e\u3059\u3002<br \/>\n * @param path \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4fdd\u5b58\u3059\u308b\u30d1\u30b9\u3002<br \/>\n *              \u5b58\u5728\u3057\u306a\u3044\u5834\u5408\u53ef\u80fd\u3067\u3042\u308c\u3070\u4f5c\u6210\u3057\u307e\u3059\u3002<br \/>\n * @param object \u4fdd\u5b58\u3059\u308b\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3002<br \/>\n * @throws FileNotFoundException<br \/>\n *                 \u6307\u5b9a\u3055\u308c\u305f\u30d1\u30b9\u540d\u3067\u793a\u3055\u308c\u308b\u30d5\u30a1\u30a4\u30eb\u304c\u958b\u3051\u306a\u304b\u3063\u305f\u5834\u5408<br \/>\n *\/<br \/>\npublic static synchronized void writeXML(String path, Object object)<br \/>\n        throws IOException {<br \/>\n    XMLEncoder enc = null;<br \/>\n    ByteArrayOutputStream out = new ByteArrayOutputStream();<br \/>\n    FileOutputStream fileStream = null;<br \/>\n    try {<br \/>\n        \/\/ \u5148\u306b\u30e1\u30e2\u30ea\u4e2d\u306bXML\u30c7\u30fc\u30bf\u3092\u51fa\u529b\u3059\u308b<br \/>\n        enc = new XMLEncoder(out);<br \/>\n        enc.writeObject(object);<br \/>\n        enc.close(); \/\/ close()\u306e\u4e2d\u3067flush()\u304c\u547c\u3070\u308c\u308b\u3002<br \/>\n        byte[] xmlbuff = out.toByteArray();<\/p>\n<p>        \/\/ Xu\u1ea5t d\u1eef li\u1ec7u byte ra file<br \/>\n        fileStream = FileOutputStream m\u1edbi (\u0111\u01b0\u1eddng d\u1eabn);<br \/>\n        fileStream.write(xmlbuff);<br \/>\n        fileStream.flush();<br \/>\n    } Cu\u1ed1i c\u00f9ng {<br \/>\n        n\u1ebfu (enc != null) {<br \/>\n            enc.close();<br \/>\n        }<br \/>\n        n\u1ebfu (ra != null) {<br \/>\n            out.close();<br \/>\n        }<br \/>\n        if (fileStream != null) {<br \/>\n            fileStream.close();<br \/>\n        }<br \/>\n    }<br \/>\n}<br \/>\n\/**<br \/>\n * Kh\u00f4i ph\u1ee5c \u0111\u1ed1i t\u01b0\u1ee3ng t\u1eeb t\u1ec7p XML t\u1ea1i \u0111\u01b0\u1eddng d\u1eabn [path] \u0111\u00e3 ch\u1ec9 \u0111\u1ecbnh.<br \/>\n * *C\u00e1c t\u1ec7p XML ph\u1ea3i \u0111\u01b0\u1ee3c l\u01b0u b\u1eb1ng java.beans.XMLEncode.<br \/>\n * \u0110\u01b0\u1eddng d\u1eabn @param \u0110\u01b0\u1eddng d\u1eabn n\u01a1i \u0111\u1ed1i t\u01b0\u1ee3ng \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef.<br \/>\n * @n\u00e9m FileNotFoundException<br \/>\n * N\u1ebfu t\u1ec7p \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh b\u1edfi t\u00ean \u0111\u01b0\u1eddng d\u1eabn \u0111\u00e3 ch\u1ec9 \u0111\u1ecbnh kh\u00f4ng t\u1ed3n t\u1ea1i<br \/>\n *\/<br \/>\n\u0110\u1ed1i t\u01b0\u1ee3ng t\u0129nh c\u00f4ng khai readXML(\u0110\u01b0\u1eddng d\u1eabn chu\u1ed7i) n\u00e9m FileNotFoundException {<br \/>\n    B\u1ed9 gi\u1ea3i m\u00e3 XML d = null;<br \/>\n    th\u1eed {<br \/>\n        d = XMLDecode m\u1edbi(new BufferedInputStream(<br \/>\n                FileInputStream m\u1edbi (\u0111\u01b0\u1eddng d\u1eabn)));<br \/>\n        tr\u1ea3 v\u1ec1 d.readObject();<br \/>\n    } Cu\u1ed1i c\u00f9ng {<br \/>\n        n\u1ebfu (d != null) {<br \/>\n            d.close();<br \/>\n        }<br \/>\n    }<br \/>\n}<br \/>\n<\/textarea><\/p>\n<p>*L\u1edbp sau s\u1ebd \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng l\u00e0m m\u1eabu c\u1ee7a l\u1edbp s\u1ebd \u0111\u01b0\u1ee3c l\u01b0u.<br \/>\n<textarea readonly=\"readonly\" style=\"font-size: 13px;height: 250px\" class=\"src\" onclick=\"this.focus();this.select()\">public class FreeSoft {<br \/>\n    private String name;<br \/>\n    private String url;<br \/>\n    public String getName() {<br \/>\n        return name;<br \/>\n    }<br \/>\n    public void setName(String name) {<br \/>\n        this.name = name;<br \/>\n    }<br \/>\n    public String getUrl() {<br \/>\n        return url;<br \/>\n    }<br \/>\n    public void setUrl(String url) {<br \/>\n        this.url = url;<br \/>\n    }<br \/>\n}<br \/>\n<\/textarea><br \/>\n<\/p>\n<h2 class=\"common_title\"><a name=\"2\">K\u1ebft qu\u1ea3 th\u1ef1c hi\u1ec7n<\/a><\/h2>\n<p>\u25c6V\u00ed d\u1ee5 th\u1ef1c thi<br \/>\n<textarea readonly=\"readonly\" style=\"font-size: 13px;height: 250px\" class=\"src\" onclick=\"this.focus();this.select()\">public static void main(String[] args) {<br \/>\n    try {<br \/>\n        \/\/ FreeSoft\u30af\u30e9\u30b9\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u751f\u6210\u3057XML\u306b\u51fa\u529b<br \/>\n        FreeSoft freeSoft = new FreeSoft();<br \/>\n        freeSoft.setName(&#8220;Chat\uff06Messenger \u30c1\u30e3\u30c3\u30c8\u3082\u30e1\u30c3\u30bb\u30f3\u30b8\u30e3\u30fc\u3082\uff01\uff01&#8221;);<br \/>\n        freeSoft.setUrl(&#8220;https:\/\/chat-messenger.com\/&#8221;);<br \/>\n        writeXML(&#8220;C:\\\\FreeSoft.xml&#8221;,freeSoft);  <\/p>\n<p>        \/\/ Kh\u00f4i ph\u1ee5c th\u1ec3 hi\u1ec7n c\u1ee7a l\u1edbp FreeSoft t\u1eeb XML<br \/>\n        FreeSoft freeSoft2 = (FreeSoft)readXML(\u201cC:\\\\FreeSoft.xml\u201d);<br \/>\n        System.out.println(\u201cT\u00ean ph\u1ea7n m\u1ec1m:\u201d+freeSoft2.getName());<br \/>\n        System.out.println(\u201cURL:\u201d+freeSoft2.getUrl());<br \/>\n    } b\u1eaft (Ngo\u1ea1i l\u1ec7 e) {<br \/>\n        e.printStackTrace();<br \/>\n    }<br \/>\n}<br \/>\n<\/textarea><br \/>\n\u25c6K\u1ebft qu\u1ea3 \u0111\u1ea7u ra<\/p>\n<pre class=\"console\">T\u00ean ph\u1ea7n m\u1ec1m: Chat &amp; Messenger V\u1eeba chat v\u1eeba nh\u1eafn tin! ! URL: https:\/\/chat-messenger.com\/\r\n<\/pre>\n<p>\u25c6N\u1ed9i dung c\u1ee7a C:\\\\FreeSoft.xml<\/p>\n<pre class=\"sample_src\"><object> Tr\u00f2 chuy\u1ec7n &amp; Messenger Tr\u00f2 chuy\u1ec7n v\u00e0 Messenger! ! https:\/\/chat-messenger.com\/<\/object> \r\n<\/pre>\n<h2 class=\"common_title\"><a name=\"3\">Nh\u1eefng \u0111i\u1ec3m c\u1ea7n l\u01b0u \u00fd khi s\u1eed d\u1ee5ng<\/a><\/h2>\n<p>C\u00e1c l\u1edbp java.beans.XMLEncode v\u00e0 java.beans.XMLDecoding r\u1ea5t h\u1eefu \u00edch, nh\u01b0ng khi \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng th\u1ef1c t\u1ebf trong Chat&amp;Messenger, trong nh\u1eefng tr\u01b0\u1eddng h\u1ee3p c\u1ef1c k\u1ef3 hi\u1ebfm g\u1eb7p, khi xu\u1ea5t ra XML b\u1eb1ng java.beans.XMLEncode, t\u1ec7p s\u1ebd tr\u1edf th\u00e0nh 0 byte.<br \/>\nN\u1ebfu t\u1ec7p 0 byte \u0111\u01b0\u1ee3c \u0111\u1ecdc, ParseException s\u1ebd \u0111\u01b0\u1ee3c ghi l\u1ea1i trong &quot;\u0111\u1ea7u ra l\u1ed7i ti\u00eau chu\u1ea9n&quot;.<br \/>\n<br \/>\nL\u00fd do cho \u0111i\u1ec1u n\u00e0y l\u00e0 t\u1ec7p s\u1ebd tr\u1ed1ng khi phi\u00ean b\u1ea3n FileOutputStream \u0111\u01b0\u1ee3c t\u1ea1o.<br \/>\nT\u00f4i tin r\u1eb1ng \u0111i\u1ec1u n\u00e0y x\u1ea3y ra khi qu\u00e1 tr\u00ecnh Java b\u1ecb t\u1eaft sau khi kh\u1edfi t\u1ea1o FileOutputStream nh\u01b0ng tr\u01b0\u1edbc khi xu\u1ea5t d\u1eef li\u1ec7u XML.<br \/>\n<br \/>\nDo s\u1ef1 c\u1ed1 n\u00e0y, Chat&amp;Messenger t\u1ea1o t\u1ec7p sao l\u01b0u \u0111\u1ec3 tr\u00e1nh s\u1ef1 c\u1ed1.<\/p>","protected":false},"excerpt":{"rendered":"<p>L\u01b0u \u0111\u1ed1i t\u01b0\u1ee3ng b\u1eb1ng Java XMLEncode v\u00e0 kh\u00f4i ph\u1ee5c b\u1eb1ng XMLDecode L\u01b0u \u0111\u1ed1i t\u01b0\u1ee3ng b\u1eb1ng Java XMLEncode [\u2026]<\/p>","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"swell_btn_cv_data":""},"categories":[19],"tags":[],"_links":{"self":[{"href":"https:\/\/chat-messenger.com\/vi\/wp-json\/wp\/v2\/posts\/945"}],"collection":[{"href":"https:\/\/chat-messenger.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/chat-messenger.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/chat-messenger.com\/vi\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/chat-messenger.com\/vi\/wp-json\/wp\/v2\/comments?post=945"}],"version-history":[{"count":4,"href":"https:\/\/chat-messenger.com\/vi\/wp-json\/wp\/v2\/posts\/945\/revisions"}],"predecessor-version":[{"id":1880,"href":"https:\/\/chat-messenger.com\/vi\/wp-json\/wp\/v2\/posts\/945\/revisions\/1880"}],"wp:attachment":[{"href":"https:\/\/chat-messenger.com\/vi\/wp-json\/wp\/v2\/media?parent=945"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/chat-messenger.com\/vi\/wp-json\/wp\/v2\/categories?post=945"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/chat-messenger.com\/vi\/wp-json\/wp\/v2\/tags?post=945"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}