【反射】利用java反射原理将xml文件中的字段封装成对应的Bean

本例使用的xml解析方式为jdom

...

<ROOT>

<Consignment>

...

</Consignment>

</ROOT>

解析xml文件

 InputStream xmlFileStream = new FileInputStream(xmlFile);
 SAXBuilder builder = new SAXBuilder(new XMLReaderSAX2Factory(false));
 Document document = builder.build(xmlFileStream);
 Element root = document.getRootElement();

获得Consignment元素

Element consignElement = root.getChild("Consignment");

遍历元素封装Bean

public static Consignment getConsignment(Element consignElement) throws Exception {
        Consignment consignment = null;
 
        try {
            List<Element> elements = consignElement.getChildren();
            Class<?> consignmentClz = Class.forName("com.entity.po.consignment.Consignment");
            consignment = (Consignment) consignmentClz.newInstance();
            for(Element ele : elements){
                CheckTypeUtil.checkType(consignment, consignmentClz, ele);
            }
        } catch (Exception e) {
           throw e;
        }
 
        return consignment;
    }

/**
     * 解析对象时过滤字段属性类型
     * @param sampleDnaGene
     * @param sampleDnaGeneClz
     * @param element
     * @throws NoSuchFieldException
     * @throws IllegalAccessException
     */
    public static void checkType(Object object, Class<?> objectClz, Element chiledEle)
            throws NoSuchFieldException, IllegalAccessException {
        Field field = objectClz.getDeclaredField(chiledEle.getName());
           field.setAccessible(true);
           if("java.lang.Integer".equals(field.getType().getName())
                   || "int".equals(field.getType().getName())){
               if (!StringUtils.isEmpty(chiledEle.getTextTrim())) {
                   field.set(object,Integer.parseInt(chiledEle.getTextTrim()));
               }
           }else if("java.lang.Long".equals(field.getType().getName())
                     || "long".equals(field.getType().getName())){
               if(!StringUtils.isEmpty(chiledEle.getTextTrim())){
                     field.set(object,Long.parseLong(chiledEle.getTextTrim()));
               }
           }else if("java.util.Date".equals(field.getType().getName())){
               if (!StringUtils.isEmpty(chiledEle.getTextTrim())) {
                   field.set(object, DateTools.stringToDate(chiledEle.getTextTrim()));
               }
           }else if("java.lang.Double".equals(field.getType().getName())
                         || "double".equals(field.getType().getName())){
               if(!StringUtils.isEmpty(chiledEle.getTextTrim())){
                     field.set(object,Double.parseDouble(chiledEle.getTextTrim()));
               }
           }else if("java.lang.Float".equals(field.getType().getName())
                     || "float".equals(field.getType().getName())){
               if(!StringUtils.isEmpty(chiledEle.getTextTrim())){
                     field.set(object,Float.parseFloat(chiledEle.getTextTrim()));
               }
            }else if("java.lang.Short".equals(field.getType().getName())
                     || "short".equals(field.getType().getName())){
                   if(!StringUtils.isEmpty(chiledEle.getTextTrim())){
                         field.set(object,Short.parseShort(chiledEle.getTextTrim()));
                   }
                }else{
               if (!StringUtils.isEmpty(chiledEle.getTextTrim())) {
                   field.set(object, chiledEle.getTextTrim());
               }else{
                   field.set(object,null);
               }
           }
    }