jaxb可以自定义序列化方式

最新推荐文章于 2021-03-15 22:16:54 发布

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jaxb可以自定义序列化方式，高手指点自己写了一个Adapter，可以实现要求了，附上代码

 
    01public class DataXmlAdapter extends  XmlAdapter<Object, List<Map<String, String>>> {
 
    02 
 
    03    /**
 
    04     * 序列化方法。
 
    05     * 
 
    06     * 把java bean转换成Element，方便JAXB按照指定格式序列化。
 
    07     */
 
    08    @Override
 
    09    public Object marshal(List<Map<String, String>> rows) throws Exception {
 
    10        // TODO Auto-generated method stub
 
    11        DocumentBuilder builder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
 
    12        Document document = builder.newDocument();
 
    13        Element rootEle = document.createElement("rows");
 
    14         
 
    15        for(Map<String, String> row:rows){
 
    16            Element rowEle = document.createElement("row");
 
    17             
 
    18            Iterator<Entry<String, String>> itera = row.entrySet().iterator();
 
    19            while (itera.hasNext()) {
 
    20                Entry<String, String> entry = itera.next();
 
    21                String key = entry.getKey();
 
    22                String value = entry.getValue();
 
    23                if (key == null  || key.equals("")) {
 
    24                    continue;
 
    25                }
 
    26                if (value == null) {
 
    27                    value = "";
 
    28                }
 
    29                Element detailEle = document.createElement(key);
 
    30                detailEle.setTextContent(value);
 
    31                rowEle.appendChild(detailEle);
 
    32            }
 
    33            rootEle.appendChild(rowEle);
 
    34        }
 
    35        document.appendChild(rootEle);
 
    36        return rootEle;
 
    37    }
 
    38 
 
    39    /**
 
    40     * 反序列化方法。
 
    41     * 
 
    42     * 把Element转换成java bean。
 
    43     */
 
    44    @Override
 
    45    public List<Map<String, String>> unmarshal(Object datas) throws Exception {
 
    46        // TODO Auto-generated method stub
 
    47        if(datas==null){
 
    48            return null;
 
    49        }
 
    50        NodeList rowlist = ((Element)datas).getChildNodes();
 
    51        if(rowlist == null){
 
    52            return null;
 
    53        }
 
    54        int rowCount = rowlist.getLength();
 
    55        if(rowCount == 0){
 
    56            return null;
 
    57        }
 
    58         
 
    59        List<Map<String, String>> result = new ArrayList<Map<String,String>>();
 
    60        for(int i = 0; i<rowCount; i++){
 
    61            Node rowNode = rowlist.item(i);
 
    62            if(!"detail".equals(rowNode.getNodeName())){
 
    63                continue;
 
    64            }
 
    65             
 
    66            NodeList detailList = rowNode.getChildNodes();
 
    67            if(detailList == null){
 
    68                continue;
 
    69            }
 
    70            int detailCount = detailList.getLength();
 
    71            if(detailCount == 0){
 
    72                continue;
 
    73            }
 
    74             
 
    75            Map<String, String> detailMap = new HashMap<String, String>();
 
    76            for(int j = 0; j < detailCount; j++){
 
    77                Node detailNode = detailList.item(j);
 
    78                String key = detailNode.getNodeName();
 
    79                String value = detailNode.getTextContent();
 
    80                if(key == null || "".equals(key)){
 
    81                    continue;
 
    82                }
 
    83                detailMap.put(key, value);
 
    84            }
 
    85            result.add(detailMap);
 
    86        }
 
    87        return result;
 
    88    }
 
    89 
 
    90}