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Struts example source code file (JSONUtil.java)
The Struts JSONUtil.java source code/* * $Id: JSONUtil.java 1076544 2011-03-03 07:19:37Z lukaszlenart $ * * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance * with the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, * software distributed under the License is distributed on an * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY * KIND, either express or implied. See the License for the * specific language governing permissions and limitations * under the License. */ package org.apache.struts2.json; import com.opensymphony.xwork2.util.TextParseUtil; import com.opensymphony.xwork2.util.WildcardUtil; import com.opensymphony.xwork2.util.logging.Logger; import com.opensymphony.xwork2.util.logging.LoggerFactory; import org.apache.commons.lang.StringUtils; import org.apache.struts2.json.annotations.SMDMethod; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import java.io.BufferedReader; import java.io.ByteArrayInputStream; import java.io.IOException; import java.io.InputStream; import java.io.PrintWriter; import java.io.Reader; import java.io.Writer; import java.lang.reflect.Method; import java.util.ArrayList; import java.util.Collection; import java.util.HashMap; import java.util.LinkedList; import java.util.List; import java.util.Map; import java.util.Set; import java.util.regex.Pattern; import java.util.zip.GZIPOutputStream; /** * Wrapper for JSONWriter with some utility methods. */ public class JSONUtil { final static String RFC3339_FORMAT = "yyyy-MM-dd'T'HH:mm:ss"; private static final Logger LOG = LoggerFactory.getLogger(JSONUtil.class); /** * Serializes an object into JSON. * * @param object * to be serialized * @return JSON string * @throws JSONException */ public static String serialize(Object object) throws JSONException { JSONWriter writer = new JSONWriter(); return writer.write(object); } /** * Serializes an object into JSON, excluding any properties matching any of * the regular expressions in the given collection. * * @param object * to be serialized * @param excludeProperties * Patterns matching properties to exclude * @param ignoreHierarchy * whether to ignore properties defined on base classes of the * root object * @return JSON string * @throws JSONException */ public static String serialize(Object object, Collection<Pattern> excludeProperties, Collection<Pattern> includeProperties, boolean ignoreHierarchy, boolean excludeNullProperties) throws JSONException { JSONWriter writer = new JSONWriter(); writer.setIgnoreHierarchy(ignoreHierarchy); return writer.write(object, excludeProperties, includeProperties, excludeNullProperties); } /** * Serializes an object into JSON, excluding any properties matching any of * the regular expressions in the given collection. * * @param object * to be serialized * @param excludeProperties * Patterns matching properties to exclude * @param ignoreHierarchy * whether to ignore properties defined on base classes of the * root object * @param enumAsBean * whether to serialized enums a Bean or name=value pair * @return JSON string * @throws JSONException */ public static String serialize(Object object, Collection<Pattern> excludeProperties, Collection<Pattern> includeProperties, boolean ignoreHierarchy, boolean enumAsBean, boolean excludeNullProperties) throws JSONException { JSONWriter writer = new JSONWriter(); writer.setIgnoreHierarchy(ignoreHierarchy); writer.setEnumAsBean(enumAsBean); return writer.write(object, excludeProperties, includeProperties, excludeNullProperties); } /** * Serializes an object into JSON to the given writer. * * @param writer * Writer to serialize the object to * @param object * object to be serialized * @throws IOException * @throws JSONException */ public static void serialize(Writer writer, Object object) throws IOException, JSONException { writer.write(serialize(object)); } /** * Serializes an object into JSON to the given writer, excluding any * properties matching any of the regular expressions in the given * collection. * * @param writer * Writer to serialize the object to * @param object * object to be serialized * @param excludeProperties * Patterns matching properties to ignore * @throws IOException * @throws JSONException */ public static void serialize(Writer writer, Object object, Collection<Pattern> excludeProperties, Collection<Pattern> includeProperties, boolean excludeNullProperties) throws IOException, JSONException { writer.write(serialize(object, excludeProperties, includeProperties, true, excludeNullProperties)); } /** * Deserializes a object from JSON * * @param json * string in JSON * @return desrialized object * @throws JSONException */ public static Object deserialize(String json) throws JSONException { JSONReader reader = new JSONReader(); return reader.read(json); } /** * Deserializes a object from JSON * * @param reader * Reader to read a JSON string from * @return deserialized object * @throws JSONException * when IOException happens */ public static Object deserialize(Reader reader) throws JSONException { // read content BufferedReader bufferReader = new BufferedReader(reader); String line; StringBuilder buffer = new StringBuilder(); try { while ((line = bufferReader.readLine()) != null) { buffer.append(line); } } catch (IOException e) { throw new JSONException(e); } return deserialize(buffer.toString()); } public static void writeJSONToResponse(SerializationParams serializationParams) throws IOException { StringBuilder stringBuilder = new StringBuilder(); if (StringUtils.isNotBlank(serializationParams.getSerializedJSON())) stringBuilder.append(serializationParams.getSerializedJSON()); if (StringUtils.isNotBlank(serializationParams.getWrapPrefix())) stringBuilder.insert(0, serializationParams.getWrapPrefix()); else if (serializationParams.isWrapWithComments()) { stringBuilder.insert(0, "/* "); stringBuilder.append(" */"); } else if (serializationParams.isPrefix()) stringBuilder.insert(0, "{}&& "); if (StringUtils.isNotBlank(serializationParams.getWrapSuffix())) stringBuilder.append(serializationParams.getWrapSuffix()); String json = stringBuilder.toString(); if (LOG.isDebugEnabled()) { LOG.debug("[JSON]" + json); } HttpServletResponse response = serializationParams.getResponse(); // status or error code if (serializationParams.getStatusCode() > 0) response.setStatus(serializationParams.getStatusCode()); else if (serializationParams.getErrorCode() > 0) response.sendError(serializationParams.getErrorCode()); // content type if (serializationParams.isSmd()) response.setContentType("application/json-rpc;charset=" + serializationParams.getEncoding()); else response.setContentType(serializationParams.getContentType() + ";charset=" + serializationParams.getEncoding()); if (serializationParams.isNoCache()) { response.setHeader("Cache-Control", "no-cache"); response.setHeader("Expires", "0"); response.setHeader("Pragma", "No-cache"); } if (serializationParams.isGzip()) { response.addHeader("Content-Encoding", "gzip"); GZIPOutputStream out = null; InputStream in = null; try { out = new GZIPOutputStream(response.getOutputStream()); in = new ByteArrayInputStream(json.getBytes(serializationParams.getEncoding())); byte[] buf = new byte[1024]; int len; while ((len = in.read(buf)) > 0) { out.write(buf, 0, len); } } finally { if (in != null) in.close(); if (out != null) { out.finish(); out.close(); } } } else { response.setContentLength(json.getBytes(serializationParams.getEncoding()).length); PrintWriter out = response.getWriter(); out.print(json); } } public static Set<String> asSet(String commaDelim) { if ((commaDelim == null) || (commaDelim.trim().length() == 0)) return null; return TextParseUtil.commaDelimitedStringToSet(commaDelim); } /** * List visible methods carrying the * * @SMDMethod annotation * * @param ignoreInterfaces * if true, only the methods of the class are examined. If false, * annotations on every interfaces' methods are examined. */ @SuppressWarnings("unchecked") public static Method[] listSMDMethods(Class clazz, boolean ignoreInterfaces) { final List<Method> methods = new LinkedList Other Struts examples (source code examples)Here is a short list of links related to this Struts JSONUtil.java source code file: |
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