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java之讀取xml字串

Document document = null;
try {
DocumentBuilderFactory builderFactory = DocumentBuilderFactory
.newInstance();
DocumentBuilder builder = builderFactory.newDocumentBuilder();
// 接收航信電子票返回的資訊
document = builder.parse(new ByteArrayInputStream(retStr
.getBytes("utf-8")));
} catch (Exception e) {
e.printStackTrace();
throw new BusinessException("開票失敗!!!解析航信返回資訊為: " + document);
}
NodeList fphm = document.getElementsByTagName("FP_HM"); // 發票號碼