透明售房网java爬虫.zip

package org.yuanhong.li.utils; import java.io.IOException; import java.io.InputStream; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; import org.codehaus.jackson.JsonNode; import org.codehaus.jackson.JsonParser; import org.codehaus.jackson.map.ObjectMapper; import org.codehaus.jackson.node.MissingNode; import org.codehaus.jackson.type.TypeReference; import org.springframework.util.StringUtils; public final class JacksonUtil { private static final ObjectMapper OBJECT_MAPPER = new ObjectMapper(); static { OBJECT_MAPPER.configure(JsonParser.Feature.ALLOW_SINGLE_QUOTES, true); OBJECT_MAPPER.configure(JsonParser.Feature.ALLOW_UNQUOTED_FIELD_NAMES, true); } /** * @param json * @return 数组返回ArrayList，对象返回LinkedHashMap, 或者null */ public static final <T> T parseJson(String json) { return parseJson(json, new TypeReference<T>() {}); } /** * @param json * @return 总是返回一个List, 如果是空或对象类型的json，则返回空的List */ @SuppressWarnings("unchecked") public static final <T> List<T> parseArrayJson(String json) { List<T> result = null; Object obj = parseJson(json); if (obj != null && List.class.isInstance(obj)) { result = (List<T>) obj; } if (result == null) { result = new ArrayList<T>(); } return result; } /** * @param json * @return 总是返回一个Map, 如果是空或数组类型的json，则返回空的Map */ @SuppressWarnings("unchecked") public static final <K, V> Map<K, V> parseObjectJson(String json) { Map<K, V> result = null; Object obj = parseJson(json); if (obj != null && Map.class.isInstance(obj)) { result = (Map<K, V>) obj; } if (result == null) { result = new HashMap<K, V>(); } return result; } /** * 序列化json * @param value * @return */ public static final String toJson(Object value) { return toJson(OBJECT_MAPPER, value); } /** * 使用一个自定义配置来序列化json * @param mapper * @param value * @return */ public static final String toJson(ObjectMapper mapper, Object value) { if (value == null) { return null; } String result = null; try { result = mapper.writeValueAsString(value); } catch (Exception e) { e.printStackTrace(); } return result; } /** * 解析为json树 * @param json * @return */ public static final JsonNode parseJsonToTree(String json) { if (json == null || StringUtils.isEmpty(json)) { return MissingNode.getInstance(); } JsonNode node = MissingNode.getInstance(); try { node = OBJECT_MAPPER.readTree(json); } catch (Exception e) { e.printStackTrace(); } return node; } /** * 解析为json树 * @param json * @return */ public static final JsonNode parseJsonToTree(InputStream json) { if (json == null) { return MissingNode.getInstance(); } JsonNode node = MissingNode.getInstance(); try { node = OBJECT_MAPPER.readTree(json); } catch (Exception e) { e.printStackTrace(); } finally { try { json.close(); } catch (IOException ignore) { } } return node; } /** * 获取子节点 * @param json * @param path * @return */ public static final JsonNode parseJsonToTree(String json, String[] path) { return getChildNode(parseJsonToTree(json), path); } /** * 获取子节点 * @param node * @param path * @return */ public static final JsonNode getChildNode(JsonNode node, String[] path) { if (path != null && path.length > 0) { for (int i = 0; i < path.length && (node!= null && !node.isMissingNode()); i++) { node = node.get(path[i]); } } if (node == null) { node = MissingNode.getInstance(); } return node; } /** * 节点是否存在 * @param node * @param name * @return */ public static final boolean exist(JsonNode node, String name) { return node != null && node.has(name); } /** * 获取当前节点的值 * @param node * @return */ public static final String getNodeValue(JsonNode node) { return getNodeValue(node, null); } /** * 获取当前节点的值 * @param node * @param defaultValue 仅当该节点不存在或值为null时，才返回默认值 * @return */ public static final String getNodeValue(JsonNode node, String defaultValue) { String value = defaultValue; if (node != null) { try { if (node.isValueNode() && !node.isNull()) { value = node.asText(); } } catch (Exception e) { e.printStackTrace(); } } return value; } /** * 获取当前节点的下某个属性的值 * @param node * @param name * @return */ public static final String getTextValue(JsonNode node, String name) { return getTextValue(node, name, null); } /** * 获取当前节点的下某个属性的值 * @param node * @param name * @param defaultValue 仅当该属性不存在或值为null时，才返回默认值 * @return */ public static final String getTextValue(JsonNode node, String name, String defaultValue) { String value = defaultValue; if (node != null) { try { JsonNode current = node.get(name); value = getNodeValue(current, defaultValue); } catch (Exception e) { e.printStackTrace(); } } return value; } /** * 直接获取某个属性的值 * @param json * @param name * @return */ public static final String getTextValue(String json, String name) { return getTextValue(parseJsonToTree(json), name); } /** * 直接获取某个属性的值 * @param json * @param name * @param defaultValue 仅当该属性不存在或值为null时，才返回默认值 * @return */ public static final String getTextValue(String json, String name, String defaultValue) { return getTextValue(parseJsonToTree(json), name, defaultValue); } /** * 当前节点的下某个属性是否为整型 * @param node * @param name * @return */ public static final boolean isIntegralValue(JsonNode node, String name) { boolean succ = false; if (node != null) { try { JsonNode current = node.get(name); if (current != null && current.isValueNode() && current.isIntegralNumber()) { succ = true; } } catch (Exception e) { e.printStackTrace(); } } return succ; } /** * 获取当前节点的下某个整形属性的值 * {"a":"123"}会返回0 * @param node * @param name * @return */ public static final long getIntegralValue(JsonNode node, String name) { long value = 0; if (node != null) { try { JsonNode current = node.get(name); if (current != null && current.isValueNode() && current.isIntegralNumber()) { value = current.asLong(); } } catch (Exception e) {