package com.cq2022.zago.base.util;import java.io.FileReader;import java.io.FileWriter;import java.io.IOException;import java.io.StringWriter;import java.util.List;import java.util.Map;import org.codehaus.jackson.JsonFactory;import org.codehaus.jackson.JsonGenerationException;import org.codehaus.jackson.JsonGenerator;import org.codehaus.jackson.JsonNode;import org.codehaus.jackson.JsonParseException;import org.codehaus.jackson.map.JsonMappingException;import org.codehaus.jackson.map.ObjectMapper;import org.codehaus.jackson.map.SerializationConfig;import org.codehaus.jackson.map.annotate.JsonSerialize;import com.alibaba.fastjson.JSONArray;/** * Json工具类，，实现JSON与Java Bean的互相转换 * User: shijing * <span style="font-family: Arial, Helvetica, sans-serif;">2015年4月3日上午10:42:19</span> */public class JsonUtils {private static ObjectMapper objectMapper = new ObjectMapper();private static JsonFactory jsonFactory = new JsonFactory();static {objectMapper.configure(SerializationConfig.Feature.WRITE_NULL_MAP_VALUES, false);objectMapper.setSerializationInclusion(JsonSerialize.Inclusion.NON_NULL);}/** * 泛型返回，json字符串转对象 * 2015年4月3日上午10:42:19 * auther:shijing * @param jsonAsString * @param pojoClass * @return * @throws JsonMappingException * @throws JsonParseException * @throws IOException */public static <T> T fromJson(String jsonAsString, Class<T> pojoClass) throws JsonMappingException,JsonParseException, IOException {return objectMapper.readValue(jsonAsString, pojoClass);}public static <T> T fromJson(FileReader fr, Class<T> pojoClass) throws JsonParseException, IOException {return objectMapper.readValue(fr, pojoClass);}/** * Object对象转json * 2015年4月3日上午10:41:53 * auther:shijing * @param pojo * @return * @throws JsonMappingException * @throws JsonGenerationException * @throws IOException */public static String toJson(Object pojo) throws JsonMappingException, JsonGenerationException, IOException {return toJson(pojo, false);}public static String toJson(Object pojo, boolean prettyPrint) throws JsonMappingException, JsonGenerationException,IOException {StringWriter sw = new StringWriter();JsonGenerator jg = jsonFactory.createJsonGenerator(sw);if (prettyPrint) {jg.useDefaultPrettyPrinter();}objectMapper.writeValue(jg, pojo);return sw.toString();}public static void toJson(Object pojo, FileWriter fw, boolean prettyPrint) throws JsonMappingException,JsonGenerationException, IOException {JsonGenerator jg = jsonFactory.createJsonGenerator(fw);if (prettyPrint) {jg.useDefaultPrettyPrinter();}objectMapper.writeValue(jg, pojo);}/** * json字符串转Map * 2015年4月3日上午10:41:25 * auther:shijing * @param jsonStr * @return * @throws IOException */public static Map<String, Object> parseMap(String jsonStr) throws IOException {Map<String, Object> map = objectMapper.readValue(jsonStr, Map.class);return map;}public static JsonNode parse(String jsonStr) throws IOException {JsonNode node = null;node = objectMapper.readTree(jsonStr);return node;}public static ObjectMapper getObjectMapper() {return objectMapper;}/** * json字符串转 List对象 * 2015年4月2日上午10:22:20 * auther:shijing * @param strjson字符串 * @param clazz转换的类型 * @return */public static <T> List<T> fromListJson(String str,Class<T> clazz){return JSONArray.parseArray(str, clazz);}}
如果我们想要更多的玫瑰花，就必须种植更多的玫瑰树。
