org.apache.commons.digester.Digester 解析 XML文件或者流

最近在做快捷支付这块,对XML这块接触的比较多.梳理XML这块的时候, 突然发现 Digester 对不管是 字符串的 XML 还是 XML文件都能很好的解析..不足点就是引用的 apache的东西有点多. (apache的东西 耦合性太高.....)不过确实好用..

 

首先是 import

 

import org.apache.commons.digester.Digester;
import org.apache.commons.digester.RuleSetBase;
import org.xml.sax.SAXException;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
 

 

这几个是主要的..至于还有其他的可以自己再加入.

 

 

一 : 然后是主方法(分两个,一个是 文件.  一个是 string字符串)

 

1:首先看 读取文件的主方法, 一些解释的话 可以上这个地址

http://onjava.com/pub/a/onjava/2002/10/23/digester.html?page=2 查看

 

	public static void testXML1() throws ParseException{
		File inputStream = new File("c:/jack/test.xml");
		Digester configDigester = new Digester();
	    configDigester.setNamespaceAware(true);
	    configDigester.setValidating(false);
	    configDigester.setUseContextClassLoader(true);
	    //load rule set
	    configDigester.addRuleSet(new PaymentStatusCheckResponseRuleSet());
	    OrderCheckResponseConfig datas = new OrderCheckResponseConfig();
	    configDigester.push(datas);
	    try {
			configDigester.parse(inputStream);
		} catch (IOException e) {
			e.printStackTrace();
			throw new ParseException(e);
		} catch (SAXException e) {
			e.printStackTrace();
			throw new ParseException(e);
		}
		 Map responseProp = new HashMap();

	        responseProp.put("status", datas.getStatus());
	        responseProp.put("statusText", datas.getStatusText());
	        responseProp.put("msgCode", datas.getMsgCode());
	        responseProp.put("msgCn", datas.getMsgCn());
	        responseProp.put("orderDate", datas.getOrderDate());
	        responseProp.put("orderTime", datas.getOrderTime());
	        responseProp.put("orderNo", datas.getOrderNo());
	        responseProp.put("orderAmt", datas.getOrderAmt());
	        responseProp.put("currId", datas.getCurrId());
	        responseProp.put("payAmt", datas.getPayAmt());
	        responseProp.put("memo", datas.getMemo());
	        responseProp.put("payNo", datas.getPayNo());
	        responseProp.put("hostDate", datas.getHostDate());
	        responseProp.put("accNo", datas.getAccNo());
	        responseProp.put("hoistTime", datas.getHoistTime());
	        responseProp.put("accType", datas.getAccType());
	        responseProp.put("pbCstName", datas.getPbCstName());
	   System.out.println(responseProp);
	}

 

 

addRuleSet , 可以写一个内部的  RuleSet 类,主要是用来读取XML的节点信息和内容的

 

 

 

/**
 * Inner class for StatusCheckResponse ruleset
 */
class PaymentStatusCheckResponseRuleSet extends RuleSetBase{
	public void addRuleInstances(Digester digester) {
        
		digester.addCallMethod("stream/status", "setStatus", 1);
        digester.addCallParam("stream/status", 0);
        
        digester.addCallMethod("stream/statusText", "setStatusText", 1);
        digester.addCallParam("stream/statusText", 0);
        
        digester.addCallMethod("stream/msgCode", "setMsgCode", 1);
        digester.addCallParam("stream/msgCode", 0);
        
        digester.addCallMethod("stream/msgCn", "setMsgCn", 1);
        digester.addCallParam("stream/msgCn", 0);
        
        digester.addCallMethod("stream/orderDate", "setOrderDate", 1);
        digester.addCallParam("stream/orderDate", 0);
        
        digester.addCallMethod("stream/orderTime", "setOrderTime", 1);
        digester.addCallParam("stream/orderTime", 0);
        
        digester.addCallMethod("stream/orderNo", "setOrderNo", 1);
        digester.addCallParam("stream/orderNo", 0);
        
        digester.addCallMethod("stream/orderAmt", "setOrderAmt", 1);
        digester.addCallParam("stream/orderAmt", 0);
        
        digester.addCallMethod("stream/currId", "setCurrId", 1);
        digester.addCallParam("stream/currId", 0);
        
        digester.addCallMethod("stream/payAmt", "setPayAmt", 1);
        digester.addCallParam("stream/payAmt", 0);
        
        digester.addCallMethod("stream/memo", "setMemo", 1);
        digester.addCallParam("stream/memo", 0);
        
        digester.addCallMethod("stream/payNo", "setPayNo", 1);
        digester.addCallParam("stream/payNo", 0);
        
        digester.addCallMethod("stream/hostDate", "setHostDate", 1);
        digester.addCallParam("stream/hostDate", 0);
        
        
        digester.addCallMethod("stream/hoistTime", "setHoistTime", 1);
        digester.addCallParam("stream/hoistTime", 0);
        
        digester.addCallMethod("stream/accNo", "setAccNo", 1);
        digester.addCallParam("stream/accNo", 0);
        
        digester.addCallMethod("stream/accType", "setAccType", 1);
        digester.addCallParam("stream/accType", 0);
        
        digester.addCallMethod("stream/pbCstName", "setPbCstName", 1);
        digester.addCallParam("stream/pbCstName", 0);
        
    }
}
 

 

 

最后就是一个实体的接受类 Digester会push数据进来的(省了 get set 方法)

 

 

public class OrderCheckResponseConfig {
	private String status; //该笔直联查询交易的状态
	private String statusText;//该笔直联查询交易状态的说明
	private String msgCode; //交易状态
	private String msgCn;   //交易状态信息
	private String orderDate;//订单日期
	private String orderTime;//订单时间
	private String orderNo;	//订单号
	private String orderAmt;//订单金额
	private String currId;	//支付币种
	private String payAmt;	//支付金额
	private String memo;	//摘要信息
	private String payNo;	//支付交易流水号
	private String hostDate;//主机操作日期
	private String hoistTime;//主机操作时间
	private String accNo;	//支付卡号
	private String accType;	//卡号类型
	private String pbCstName;//个人消费者中文姓名
 

 

这个 的 XML 比较简单 如下图所示.没有什么复杂的节点.

 

 



  1
  2
  交易状态
  交易状态信息
  订单日期
  订单时间
  订单号
  订单金额
  支付币种
  支付金额
  摘要信息
  支付交易流水号
  主机操作日期
  主机操作时间
  支付卡号
  卡号类型
  个人消费者中文姓名
 

 

 

 

2:如果是字符串形式的话. 方法如下  (删除了一些, 还需要转变编码格式)

 

 

 

public static void testXML2() throws ParseException{
		String text = "交易状态交易状态信息批次号银行受理成功总笔数银行受理成功总金额银行受理失败总笔数银行受理失败总金额" +
				"商户充值退回流水号liststatusliststatusText";
		System.out.println(text);
		
		InputStream inputStream=new ByteArrayInputStream(text..getBytes("gb2312"));//指定编码格式防止乱码

		//File inputStream = new File("c:/jack/refund.xml");
		Digester configDigester = new Digester();
	    configDigester.setNamespaceAware(true);
	    configDigester.setValidating(false);
	    configDigester.setUseContextClassLoader(true);
	    //load rule set
	    configDigester.addRuleSet(new CNCBRefundRuleset());
	    CNCBRefundConfig datas = new CNCBRefundConfig();
	    configDigester.push(datas);
	    try {
			configDigester.parse(inputStream);
		} catch (IOException e) {
			e.printStackTrace();
			throw new ParseException(e);
		} catch (SAXException e) {
			e.printStackTrace();
			throw new ParseException(e);
		}
		 Map responseProp = new HashMap();

	        responseProp.put("status", datas.getStatus());
	        responseProp.put("statusText", datas.getStatusText());
	        
	        responseProp.put("batNo", datas.getStatus());
	        responseProp.put("sucTotalNum", datas.getSucTotalNum());
	        responseProp.put("sucTotalAmt", datas.getSucTotalAmt());
	        responseProp.put("errTotalNum", datas.getErrTotalNum());
	        responseProp.put("errTotalAmt", datas.getErrTotalAmt());
	        responseProp.put("cancelFlwNo", datas.getCancelFlwNo());
	        
	        responseProp.put("liststatus", datas.getListsStatus());
	        responseProp.put("liststatusText", datas.getListstatusText());
	        
	        
	   System.out.println(responseProp);
	}
 

 

设置RuleSet  ,写一个内部类

 

class CNCBRefundRuleset  extends RuleSetBase{
	@Override
	public void addRuleInstances(Digester digester) {
		// TODO Auto-generated method stub
		digester.addCallMethod("stream/status", "setStatus", 1);
        digester.addCallParam("stream/status", 0);
        
        digester.addCallMethod("stream/statusText", "setStatusText", 1);
        digester.addCallParam("stream/statusText", 0);
        
    	digester.addCallMethod("stream/sucTotalAmt", "setSucTotalAmt", 1);
        digester.addCallParam("stream/sucTotalAmt", 0);
        
        digester.addCallMethod("stream/sucTotalNum", "setSucTotalNum", 1);
        digester.addCallParam("stream/sucTotalNum", 0);
        
        digester.addCallMethod("stream/errTotalNum", "setErrTotalNum", 1);
        digester.addCallParam("stream/errTotalNum", 0);
        
        digester.addCallMethod("stream/errTotalAmt", "setErrTotalAmt", 1);
        digester.addCallParam("stream/errTotalAmt", 0);
        
        
        digester.addCallMethod("stream/list/row/cancelFlwNo", "setCancelFlwNo", 1);  //这里的 list 也可以用name 来表示.结果是一样的
        digester.addCallParam("stream/list/row/cancelFlwNo", 0);
        
        digester.addCallMethod("stream/list/row/status", "setListsStatus", 1);//以后不管子节点有多少,从最开始往下取,这样就很方便的解析了.
        digester.addCallParam("stream/list/row/status", 0); 
        
        digester.addCallMethod("stream/list/row/statusText", "setListstatusText", 1);
        digester.addCallParam("stream/list/row/statusText", 0);
	}
	
}
 

 

实体bean 

 

 

class CNCBRefundConfig{
	private String status;
	private String statusText;
	private String batNo;
	private String sucTotalNum;
	private String sucTotalAmt;
	private String errTotalNum;
	private String errTotalAmt;
	private String cancelFlwNo;
	private String listsStatus; //如果有重名的,则可以加上list 这个 父节点,区别.  这个就解决了子节点太难读的缺点,可以按照节点路径取值.
	private String liststatusText;
 

 

 

 

 

这个是 XML的 文件形式的.  上面字符串的删除了一些东西. 这个是完整的

 



    交易状态
  交易状态信息
  批次号
  银行受理成功总笔数
  银行受理成功总金额
  银行受理失败总笔数
  银行受理失败总金额
  
    
       商户充值退回流水号
         liststatus
         liststatusText
  	
  

 

 

这里面在整理的时候, 不是很方便整理. 而且还去掉了银行的缩写. 如有需要. 到时候再看有心情整理否.

 

 

------------------------------------------------------追加-----------------------

 

追加一点如果是 XML中的字段含有属性, 想获取属性值.原理差不多. 只是调用的方法不一样.

 

 



  digester.addSetProperties("items/result", "value", "resultStatus");
 

 在ruleset 里面 用这个就好了.   其中 resultStatus 是接受bean里面的一个属性.

 

 

 

--------------------------------------------------------继续追加----------------------------------------

 

如果是是下面这种格式的XML

 

 











 

则可以用更简单的编码格式.

 

RuleSetBase

 

 

public class ConfigRuleSet extends RuleSetBase{        //注意,需要继承RuleSetBase
public void addRuleInstances(Digester digester){
digester.setValidating( false );
digester.addObjectCreate("web", WebConfig.class) ;
digester.addSetProperties("web");

digester.addObjectCreate( "web/root", Root.class );
digester.addSetProperties("web/root");
digester.addSetNext( "web/root", "addRoot" );

digester.addObjectCreate( "web/root/bar", Bar.class );
digester.addSetProperties("web/root/bar");
digester.addSetNext( "web/root/bar", "addBar" );

} 
}
 

编译解析XML

 

 

		final String fileName = "/card/bean/Item.xml" ;
		Items items = new Items() ;
		Digester digester = new Digester() ;
		ConfigRuleSet rule = new ConfigRuleSet();
		rule.addRuleInstances(digester) ;
		try {
			items = (Items)digester.parse(new File(fileName)) ;
		System.out.println("items size :" + items.getSize()) ;
		System.out.println("items getResult :"+items.getResult());
		Item[] item = items.getItemMap() ;
		for (int i = 0; i < item.length; i++) {
			System.out.println("item type:" + item[i].getType()) ;
			Param[] param = item[i].getParams() ;
			for (int j = 0; j < param.length; j++) {
				if(j>0) System.out.println("/t------------------");
					System.out.println("/param name:" + param[j].getName()) ;
					System.out.println("/param value:" + param[j].getValue()) ;
			}
		}
		} catch (IOException e) {
		e.printStackTrace();
		} catch (SAXException e) {
		e.printStackTrace();
		} 
 

然后是各个 bean 之间的关系, 这里就不整理了.

 

这里摘自 :http://blog.csdn.net/gooing/article/details/381399  

 

 

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