Java tutorial
/* Copyright (C) 2010 Brian Dunigan This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>. */ package org.openstatic.util; import org.json.*; import java.io.ByteArrayInputStream; import java.io.ByteArrayOutputStream; import java.io.InputStream; public class JSONUtil { public static String htmlEntityEncode(String s) { StringBuilder buf = new StringBuilder(s.length()); int len = s.length(); for (int i = 0; i < len; i++) { char c = s.charAt(i); if (c >= 'a' && c <= 'z' || c >= 'A' && c <= 'Z' || c >= '0' && c <= '9') { buf.append(c); } else { buf.append("&#").append((int) c).append(";"); } } return buf.toString(); } public static InputStream json2html(InputStream is) throws Exception { try { ByteArrayOutputStream baos = new ByteArrayOutputStream(); int inputByte; while ((inputByte = is.read()) > -1) { baos.write(inputByte); } is.close(); String jdata = "<html><body>" + json2html(new String(baos.toByteArray())) + "</body></html>"; baos.reset(); ByteArrayInputStream data = new ByteArrayInputStream(jdata.getBytes()); return data; } catch (Exception e) { System.err.println(e.getMessage()); e.printStackTrace(System.err); return null; } } public static String json2html(String jdata) throws Exception { if (jdata.trim().startsWith("[")) { return json2table(new JSONArray(jdata)); } else if (jdata.trim().startsWith("{")) { return json2table(new JSONObject(jdata)); } else { return null; } } public static String json2table(JSONArray jarray) throws Exception { String return_string = "<table cellpadding=\"4\">"; for (int m = 0; m < jarray.length(); m++) { return_string += "<tr><td style=\"border-bottom: 1px dashed #999999;\">"; Object value = jarray.get(m); if (value != null) { if (value instanceof JSONObject) { return_string += json2table((JSONObject) value); } else if (value instanceof JSONArray) { return_string += json2table((JSONArray) value); } else { return_string += htmlEntityEncode(jarray.getString(m)); } } return_string += "</td></tr>"; } return_string += "</table>"; return return_string; } public static String json2table(JSONObject jobject) throws Exception { String return_string = "<table cellspacing=\"0\" cellpadding=\"4\" style=\"border-color: #000000; border-style: solid; border-width: 1px; background-color: #FFFFFF; color: #000000;\">\r\n"; String[] fnames = JSONObject.getNames(jobject); if (fnames != null) { return_string += "<tr style=\"background-color: #AAAAAA; color: #000000;\"><th>KEY</th><th>VALUE</th></tr>"; for (int i = 0; i < fnames.length; i++) { Object value = jobject.get(fnames[i]); String string_value = ""; if (value != null) { if (value instanceof JSONObject) string_value = json2table((JSONObject) value); else if (value instanceof JSONArray) { string_value = json2table((JSONArray) value); } else { string_value = htmlEntityEncode(jobject.getString(fnames[i])); } } return_string += "<tr><td style=\"border-bottom: 1px dotted #999999; border-right: 1px dotted #999999; vertical-align: text-top;\">" + fnames[i] + "<td style=\"border-bottom: 1px dotted #999999;\">" + string_value + "</td></tr>"; } } return_string += "</table>"; return return_string; } }