Map javaBean 互转化

public class MapToBeanUtils {
    private static final Logger logger = LoggerFactory.getLogger(MapToBeanUtils.class);

    /**
     * 将javabean实体类转为SortedMap类型，过滤属性值为null和空的
     * 然后返回一个SortedMap类型的值
     *
     * @param obj
* @return
*/
public static SortedMap<String, Object> beanToSortedMap(Object obj) {
        SortedMap<String, Object> params = new TreeMap<String, Object>();
        try {
            PropertyUtilsBean propertyUtilsBean = new PropertyUtilsBean();
            PropertyDescriptor[] descriptors = propertyUtilsBean.getPropertyDescriptors(obj);
            for (int i = 0; i < descriptors.length; i++) {
                String name = descriptors[i].getName();
                if (!"class".equals(name)) {
                    Object value =propertyUtilsBean.getNestedProperty(obj, name);
                    if(StringUtils.isEmpty(value)){
                        continue;
                    }
                    params.put(name, value);
                }
            }
        } catch (Exception e) {
            logger.error("javabean实体类转为SortedMap类型异常！",e);
            e.printStackTrace();
        }
        return params;
    }

    /**
     * javabean实体类转 Map对象
     * @param obj
* @return
*/
public static Map<String, Object> beanToMap(Object obj) {
        Map<String, Object> params = new HashMap<String, Object>();
        try {
            PropertyUtilsBean propertyUtilsBean = new PropertyUtilsBean();
            PropertyDescriptor[] descriptors = propertyUtilsBean.getPropertyDescriptors(obj);
            for (int i = 0; i < descriptors.length; i++) {
                String name = descriptors[i].getName();
                if (!"class".equals(name)) {
                    params.put(name, propertyUtilsBean.getNestedProperty(obj, name));
                }
            }
        } catch (Exception e) {
            logger.error("java bean 转 map 异常！",e);
            e.printStackTrace();
        }
        return params;
    }

    /**
     * Map 转 javabean
     * @param type
* @param map
* @return
*/
public static final Object toBean(Class<?> type, Map<String, ? extends Object> map){
        try {
            BeanInfo beanInfo = Introspector.getBeanInfo(type);
            Object obj = type.newInstance();
            PropertyDescriptor[] propertyDescriptors = beanInfo.getPropertyDescriptors();
            for (int i = 0; i < propertyDescriptors.length; i++) {
                PropertyDescriptor descriptor = propertyDescriptors[i];
                String propertyName = descriptor.getName();
                if (map.containsKey(propertyName)) {
                    Object value = map.get(propertyName);
                    Object[] args = new Object[1];
                    args[0] = value;
                    descriptor.getWriteMethod().invoke(obj, args);
                }
            }
            return obj;
        }catch (Exception e){
            logger.error("map 转 java bean异常！",e);
            e.printStackTrace();
        }
        return null;
    }

    public static void main(String[] args) {
        MapToBeanUtils mapUtils = new MapToBeanUtils();
        MapToBeanUtils.Test wxapuor =mapUtils.new Test();
        wxapuor.setAppid("123456789");
        wxapuor.setMchId("00000000");
        wxapuor.setTradeType("APP");
        wxapuor.setNonceStr(RandomUtils.getNonceStr(null));
        wxapuor.setSign("");
        SortedMap map=  MapToBeanUtils.beanToSortedMap(wxapuor);

        Set es = map.entrySet();
        Iterator it = es.iterator();
        while(it.hasNext()) {
            Map.Entry entry = (Map.Entry)it.next();
            String k = (String)entry.getKey();
            String v = (String)entry.getValue();
            System.out.println("key:"+k+"  value:"+v);

        }

        XStream xStream = new XStream();
        xStream.autodetectAnnotations(true);
        String xml = xStream.toXML(wxapuor);
        System.out.println("xml:==="+xml);
        String sml="<xml>\n" +
                "  <appid><![CDATA[123456789]]></appid>\n" +
                "  <mch_id><![CDATA[00000000]]></mch_id>\n" +
                "  <nonce_str><![CDATA[DF334B223E699294764C2BB7AE40D8DB]]></nonce_str>\n" +
                "  <sign><![CDATA[]]></sign>\n" +
                "  <trade_type><![CDATA[APP]]></trade_type>\n" +
                "</xml>";
        XStream xStream1 = new XStream();
        xStream1.processAnnotations(MapToBeanUtils.Test.class);
        xStream1.alias("xml", MapToBeanUtils.Test.class);
        MapToBeanUtils.Test wxapuors = (MapToBeanUtils.Test)xStream1.fromXML(sml);
        System.out.println(wxapuors.getAppid()+"=="+wxapuors.getErrCode());

    }

   @XStreamAlias("xml")
   public class Test{
       /**
        *返回状态码
        */
@XStreamAlias("return_code")
       private String returnCode;

       /**
        * 返回信息:如非空，为错误原因
        */
@XStreamAlias("return_msg")
       private String returnMsg;

       /**
        * 应用APPID
        */
@XStreamAlias("appid")
       private String appid;

       /**
        * 商户号
        */
@XStreamAlias("mch_id")
       private String mchId;

       /**
        *设备号
        */
@XStreamAlias("device_info")
       private String deviceInfo;

       /**
        * 随机字符串
        */
@XStreamAlias("nonce_str")
       private String nonceStr;

       /**
        * 签名
        */
@XStreamAlias("sign")
       private String sign;

       /**
        * 业务结果
        */
@XStreamAlias("result_code")
       private String resultCode;

       /**
        * 错误代码
        */
@XStreamAlias("err_code")
       private String errCode;

       /**
        * 错误代码描述
        */
@XStreamAlias("err_code_des")
       private String errCodeDes;

       /**
        * 交易类型
        */
@XStreamAlias("trade_type")
       private String tradeType;

       /**
        * 预支付交易会话标识
        */
@XStreamAlias("prepay_id")
       private String prepayId;

        public String getReturnCode() {
            return returnCode;
        }

        public void setReturnCode(String returnCode) {
            this.returnCode = returnCode;
        }

        public String getReturnMsg() {
            return returnMsg;
        }

        public void setReturnMsg(String returnMsg) {
            this.returnMsg = returnMsg;
        }

        public String getAppid() {
            return appid;
        }

        public void setAppid(String appid) {
            this.appid = appid;
        }

        public String getMchId() {
            return mchId;
        }

        public void setMchId(String mchId) {
            this.mchId = mchId;
        }

        public String getDeviceInfo() {
            return deviceInfo;
        }

        public void setDeviceInfo(String deviceInfo) {
            this.deviceInfo = deviceInfo;
        }

        public String getNonceStr() {
            return nonceStr;
        }

        public void setNonceStr(String nonceStr) {
            this.nonceStr = nonceStr;
        }

        public String getSign() {
            return sign;
        }

        public void setSign(String sign) {
            this.sign = sign;
        }

        public String getResultCode() {
            return resultCode;
        }

        public void setResultCode(String resultCode) {
            this.resultCode = resultCode;
        }

        public String getErrCode() {
            return errCode;
        }

        public void setErrCode(String errCode) {
            this.errCode = errCode;
        }

        public String getErrCodeDes() {
            return errCodeDes;
        }

        public void setErrCodeDes(String errCodeDes) {
            this.errCodeDes = errCodeDes;
        }

        public String getTradeType() {
            return tradeType;
        }

        public void setTradeType(String tradeType) {
            this.tradeType = tradeType;
        }

        public String getPrepayId() {
            return prepayId;
        }

        public void setPrepayId(String prepayId) {
            this.prepayId = prepayId;
        }

        @Override
public String toString() {
            return "WxAppPayUnifiedOrderRes{" +
                    "returnCode='" + returnCode + '\'' +
                    ", returnMsg='" + returnMsg + '\'' +
                    ", appid='" + appid + '\'' +
                    ", mchId='" + mchId + '\'' +
                    ", deviceInfo='" + deviceInfo + '\'' +
                    ", nonceStr='" + nonceStr + '\'' +
                    ", sign='" + sign + '\'' +
                    ", resultCode='" + resultCode + '\'' +
                    ", errCode='" + errCode + '\'' +
                    ", errCodeDes='" + errCodeDes + '\'' +
                    ", tradeType='" + tradeType + '\'' +
                    ", prepayId='" + prepayId + '\'' +
                    '}';
        }
    }
}