import net.sf.ezmorph.object.DateMorpher;
import net.sf.json.JSONArray;
import net.sf.json.JSONObject;
import net.sf.json.JsonConfig;
import net.sf.json.processors.JsonValueProcessor;
import net.sf.json.util.CycleDetectionStrategy;
import net.sf.json.util.JSONUtils;
/**
* 处理json的工具类，负责json数据转换成java对象和java对象转换成json * * @since 2012年7月4日22:36:43 * @author leaves,QQ：1330771552 */public class JsonUtil { /** * 从一个JSON 对象字符格式中得到一个java对象 * * @param jsonString * @param pojoCalss * @return */ @SuppressWarnings("unchecked") public static <T> T jsonToObject(String jsonString, Class<T> pojoCalss) { Object pojo; JSONObject jsonObject = JSONObject.fromObject(jsonString); pojo = JSONObject.toBean(jsonObject, pojoCalss); return (T) pojo; } /** * json字符串转换成集合 * * @param jsonString * @param pojoClass * @return */ @SuppressWarnings("unchecked") public static <T> List<T> jsonToList(String jsonString, Class<T> pojoClass) { JSONArray jsonArray = JSONArray.fromObject(jsonString); JSONObject jsonObject; Object pojoValue; List<T> list = new ArrayList<T>(); for (int i = 0; i < jsonArray.size(); i++) { jsonObject = jsonArray.getJSONObject(i); pojoValue = JSONObject.toBean(jsonObject, pojoClass); list.add((T) pojoValue); } return list; } /** * json字符串转换成集合 * * @param jsonString * @param pojoClass * @return */ @SuppressWarnings("unchecked") public static <T> List<T> jsonToList(String jsonString, Class<T> pojoClass, String dataFormat) { JsonConfig jsonConfig = configJson(dataFormat); JSONArray jsonArray = JSONArray.fromObject(jsonString, jsonConfig); JSONObject jsonObject; Object pojoValue; List<T> list = new ArrayList<T>(); for (int i = 0; i < jsonArray.size(); i++) { jsonObject = jsonArray.getJSONObject(i); pojoValue = JSONObject.toBean(jsonObject, pojoClass); list.add((T) pojoValue); } return list; } /** * 将java对象转换成json字符串 * * @param javaObj * @return */ public static String objectToJson(Object javaObj) { JSONObject json; json = JSONObject.fromObject(javaObj); return json.toString(); } /** * 将java对象转换成json字符串,并设定日期格式 * * @param javaObj * 要转换的java对象 * @param dataFormat * 制定的日期格式 * @return */ public static String objectToJson(Object javaObj, String dataFormat) { JSONObject json; JsonConfig jsonConfig = configJson(dataFormat); json = JSONObject.fromObject(javaObj, jsonConfig); return json.toString(); } /** * list变成json * * @param list * @return */ public static <T> String listToJson(List<T> list) { JSONArray json; json = JSONArray.fromObject(list); return json.toString(); } /** * list变成json * * @param list * @return */ public static <T> String listToJson(List<T> list, String dataFormat) { JSONArray json; JsonConfig jsonConfig = configJson(dataFormat); json = JSONArray.fromObject(list, jsonConfig); return json.toString(); } /** * JSON 时间解析器 * * @param datePattern * @return */ public static JsonConfig configJson(final String datePattern) { JSONUtils.getMorpherRegistry().registerMorpher(new DateMorpher(new String[] { datePattern })); JsonConfig jsonConfig = new JsonConfig(); jsonConfig.setIgnoreDefaultExcludes(false); jsonConfig.setCycleDetectionStrategy(CycleDetectionStrategy.LENIENT); jsonConfig.registerJsonValueProcessor(Date.class, new JsonValueProcessor() { @Override public Object processObjectValue(String key, Object value, JsonConfig jsonConfig) { if (value instanceof Date) { String str = new SimpleDateFormat(datePattern).format((Date) value); return str; } return value == null ? null : value.toString(); } @Override public Object processArrayValue(Object value, JsonConfig jsonConfig) { String[] obj = {}; if (value instanceof Date[]) { SimpleDateFormat sf = new SimpleDateFormat(datePattern); Date[] dates = (Date[]) value; obj = new String[dates.length]; for (int i = 0; i < dates.length; i++) { obj[i] = sf.format(dates[i]); } } return obj; } }); return jsonConfig; }}data=[{"xuHao":"201407140001","scaleNo":"01","qrCode":"440100100002B993","beforeWeight":15.85,"fillingWeight":30.50,"steelno":"013267","fillingWorkerID":"","fillingDate":"2014-07-14 09:29:01"},{"xuHao":"201507140002","scaleNo":"01","qrCode":"4401001000013475","beforeWeight":15.85,"fillingWeight":30.50,"steelno":"003212","fillingWorkerID":"","fillingDate":"2015-07-14 09:33:01"}]
String strObject=request.getParameter("data");
FillingDetailRecordsEntity requestBean=(FillingDetailRecordsEntity)jsonToObject(strObject,FillingDetailRecordsEntity.class);
json lib 2.4及其依赖包下载
下载文件地址：https://files.cnblogs.com/files/xiandedanteng/json-lib-2.4%26dependencies_jars.rar
它包括
commons-beanutils-1.9.3.jar
commons-collections-3.2.jar
commons-lang-2.3.jar
commons-logging-1.2.jar
ezmorph-1.0.6.jar
json-lib-2.4-jdk15.jar
这些库可以满足转化Java对象到json的需要。