fastjson 工具类

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import java.util.ArrayList;import java.util.List;import java.util.Map;import com.alibaba.fastjson.JSON;import com.alibaba.fastjson.JSONObject;import com.alibaba.fastjson.TypeReference;import com.alibaba.fastjson.serializer.JSONLibDataFormatSerializer;import com.alibaba.fastjson.serializer.SerializeConfig;import com.alibaba.fastjson.serializer.SerializerFeature;public class FastJsonTools {private static final SerializeConfig config;static {config = new SerializeConfig();config.put(java.util.Date.class, new JSONLibDataFormatSerializer()); // 使用和json-lib兼容的日期输出格式config.put(java.sql.Date.class, new JSONLibDataFormatSerializer()); // 使用和json-lib兼容的日期输出格式}private static final SerializerFeature[] features = { SerializerFeature.WriteMapNullValue, // 输出空置字段SerializerFeature.WriteNullListAsEmpty, // list字段如果为null，输出为[]，而不是nullSerializerFeature.WriteNullNumberAsZero, // 数值字段如果为null，输出为0，而不是nullSerializerFeature.WriteNullBooleanAsFalse, // Boolean字段如果为null，输出为false，而不是nullSerializerFeature.WriteNullStringAsEmpty // 字符类型字段如果为null，输出为""，而不是null};/** * Object 转换成字符串 * @param object * @return */public static String toJSONFeaturesString(Object object) {return JSON.toJSONString(object, config, features);}/** * Object 转换成字符串 * @param object * @return */public static String toJSONString(Object object) {return JSON.toJSONString(object, config);}public static Object toBean(String text) {return JSON.parse(text);} /**       * json字符串转化为map       * @param s       * @return       */      public static Map stringToCollect(String s) {          Map m = JSONObject.parseObject(s);          return m;      }            /**       * 将map转化为string       * @param m       * @return       */      public static String collectToString(Map m) {          String s = JSONObject.toJSONString(m);          return s;      }  /** * 用fastjson 将json字符串解析为一个 JavaBean *  * @param jsonString * @param cls * @return */public static <T> T getJson(String jsonString, Class<T> cls) {T t = null;try {t = JSON.parseObject(jsonString, cls);} catch (Exception e) {e.printStackTrace();}return t;}/** * 用fastjson 将json字符串 解析成为一个 List<JavaBean> 及 List<String> *  * @param jsonString * @param cls * @return */public static <T> List<T> getArrayJson(String jsonString, Class<T> cls) {List<T> list = new ArrayList<T>();try {list = JSON.parseArray(jsonString, cls);} catch (Exception e) {e.printStackTrace();}return list;}/** * 用fastjson 将json字符串 解析成为一个 List<JavaBean> 及 List<String> *  * @param jsonString * @param cls * @return */@SuppressWarnings("unchecked")public static <T> List<T> getArrayJson(String jsonString) {List<T> list = new ArrayList<T>();try {list = (List<T>) JSON.parseArray(jsonString);} catch (Exception e) {e.printStackTrace();}return list;}/** * 用fastjson 将jsonString 解析成 List<Map<String,Object>> *  * @param jsonString * @return */public static List<Map<String, Object>> getListMap(String jsonString) {List<Map<String, Object>> list = new ArrayList<Map<String, Object>>();try {// 两种写法// list = JSON.parseObject(jsonString, new// TypeReference<List<Map<String, Object>>>(){}.getType());list = JSON.parseObject(jsonString, new TypeReference<List<Map<String, Object>>>() {});} catch (Exception e) {e.printStackTrace();}return list;}}
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