JSON 工具类
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需要导入json-lib-2.4-jdk15.jar,ezmorph-1.0.6.jar
工具类源码:
package com.my.util;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
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.util.JSONUtils;
public class JsonUtil {
private static void setDataFormat2JAVA() {
JSONUtils.getMorpherRegistry().registerMorpher(
new DateMorpher(new String[] { "yyyy-MM-dd", "yyyy-MM-dd HH:mm:ss" }));
}
static {
setDataFormat2JAVA();
}
public static Object getObject(String jsonString, Class<?> clazz) {
JSONObject jsonObject = null;
try {
jsonObject = JSONObject.fromObject(jsonString);
} catch (Exception e) {
e.printStackTrace();
}
return JSONObject.toBean(jsonObject, clazz);
}
public static Object getObject(String jsonString, Class<?> clazz, Map map) {
JSONObject jsonObject = null;
try {
jsonObject = JSONObject.fromObject(jsonString);
} catch (Exception e) {
e.printStackTrace();
}
return JSONObject.toBean(jsonObject, clazz, map);
}
public static Object[] getArray(String jsonString, Class<?> clazz) {
JSONArray array = JSONArray.fromObject(jsonString);
Object[] obj = new Object[array.size()];
for (int i = 0; i < array.size(); i++) {
JSONObject jsonObject = array.getJSONObject(i);
obj[i] = JSONObject.toBean(jsonObject, clazz);
}
return obj;
}
public static Object[] getArray(String jsonString, Class<?> clazz, Map map) {
JSONArray array = JSONArray.fromObject(jsonString);
Object[] obj = new Object[array.size()];
for (int i = 0; i < array.size(); i++) {
JSONObject jsonObject = array.getJSONObject(i);
obj[i] = JSONObject.toBean(jsonObject, clazz, map);
}
return obj;
}
public static List getList(String jsonString, Class<?> clazz) {
JSONArray array = JSONArray.fromObject(jsonString);
List list = new ArrayList();
for (Iterator iter = array.iterator(); iter.hasNext();) {
JSONObject jsonObject = (JSONObject) iter.next();
list.add(JSONObject.toBean(jsonObject, clazz));
}
return list;
}
public static List getList(String jsonString, Class<?> clazz, Map map) {
JSONArray array = JSONArray.fromObject(jsonString);
List list = new ArrayList();
for (Iterator iter = array.iterator(); iter.hasNext();) {
JSONObject jsonObject = (JSONObject) iter.next();
list.add(JSONObject.toBean(jsonObject, clazz, map));
}
return list;
}
public static Map getMapFromJson(String jsonString) {
JSONObject jsonObject = JSONObject.fromObject(jsonString);
Map map = new HashMap();
for (Iterator iter = jsonObject.keys(); iter.hasNext();) {
String key = (String) iter.next();
map.put(key, jsonObject.get(key));
}
return map;
}
public static Object[] getObjectArrayFromJson(String jsonString) {
JSONArray jsonArray = JSONArray.fromObject(jsonString);
return jsonArray.toArray();
}
public static String getJSONString(Object object) {
String jsonString = null;
JsonConfig jsonConfig = new JsonConfig();
jsonConfig.registerJsonValueProcessor(java.util.Date.class, new JsonDateValueProcessor());
if (object != null) {
if (object instanceof Collection || object instanceof Object[]) {
jsonString = JSONArray.fromObject(object, jsonConfig).toString();
} else {
jsonString = JSONObject.fromObject(object, jsonConfig).toString();
}
}
return jsonString == null ? "{}" : jsonString;
}
public static void main(String[] arg) throws Exception {
String s = "{status : 'success'}";
System.out.println(" object : " + JsonUtil.getJSONString(s));
}
}
package com.my.util;
import java.text.SimpleDateFormat;
public class JsonDateValueProcessor implements JsonValueProcessor {
private String format = "yyyy-MM-dd HH:mm:ss";
public JsonDateValueProcessor() {
}
public JsonDateValueProcessor(String format) {
this.format = format;
}
public Object processArrayValue(Object value, JsonConfig jsonConfig) {
return process(value, jsonConfig);
}
public Object processObjectValue(String key, Object value, JsonConfig jsonConfig) {
return process(value, jsonConfig);
}
private Object process(Object value, JsonConfig jsonConfig) {
if (value instanceof Date) {
String str = new SimpleDateFormat(format).format((Date) value);
return str;
}
return value == null ? null : value.toString();
}
public String getFormat() {
return format;
}
public void setFormat(String format) {
this.format = format;
}
}
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