XSLT获得一些计算的节点值,超过下一行节点的值

时间:2019-03-22 15:23:39

标签: xml xslt

我有以下.xml文件:

<?xml version="1.0" encoding="utf-8"?>
<upkeepList>
  <upkShare month_year="11_16-12_16" post_dte="01-20-17" due="02-04-17"> 
    <OpngBlnce>22</OpngBlnce>
    <mnthCrrntAmnt>77</mnthCrrntAmnt> 
    <Rcpt dte="01-26-17" No="5725">
      <amnt>22</amnt>
      <descrpt>"11/16" upkeep </descrpt>
    </Rcpt>
    <Rcpt dte="01-26-17" No="5726">
      <amnt>41</amnt>
      <descrpt>"12/16" upkeep </descrpt>
    </Rcpt>
  </upkShare>
  <upkShare month_year="01_17-02_17" post_dte="03-17-17" due="04-03-17">
    <OpngBlnce></OpngBlnce>   <!-- starting from this sect. this tag can be omitted as it'a calculated field -->
    <mnthCrrntAmnt>74</mnthCrrntAmnt>
    <Rcpt dte="03-30-17" No="5783">
     <amnt>50</amnt>
     <descrpt>"01/17-02/17" upkeep</descrpt>
    </Rcpt>
  </upkShare>
 <upkShare month_year="03-17" post_dte="04-16-17" due="05-02-17"> 
  <OpngBlnce></OpngBlnce>
  <mnthCrrntAmnt>55</mnthCrrntAmnt>
  <Rcpt dte="05-10-17" No="5815">
    <amnt>40</amnt>
    <descrpt>"03/17-04/17" upkeep 1</descrpt>
  </Rcpt>
  <Rcpt dte="05-15-17" No="5825">
   <amnt>9</amnt>
   <descrpt>"03/17-04/17" upkeep 2</descrpt>
  </Rcpt> 
 </upkShare>
 <upkShare month_year="04_17-05_17" post_dte="06-05-17" due="06-30-17">
  <OpngBlnce></OpngBlnce>
  <mnthCrrntAmnt>64</mnthCrrntAmnt>
  <Rcpt dte="06-14-17" No="5858">
   <amnt>37</amnt>
   <descrpt>"05/17" upkeep 1</descrpt>
  </Rcpt>
  <Rcpt dte="06-18-17" No="5863">
   <amnt>21</amnt>
   <descrpt>"05/17" upkeep 2</descrpt>
  </Rcpt>
 </upkShare>
 <upkShare month_year="06_17" post_dte="07-16-17" due="07-30-17">
  <OpngBlnce></OpngBlnce>
  <mnthCrrntAmnt>45</mnthCrrntAmnt>
  <Rcpt dte="07-28-17" No="5948">
   <amnt>38</amnt>
   <descrpt>"06/17" upkeep</descrpt>
  </Rcpt>
 </upkShare> 
 <upkShare month_year="07_17" post_dte="08-16-17" due="08-31-17">
  <OpngBlnce></OpngBlnce>
  <mnthCrrntAmnt>54</mnthCrrntAmnt>
  <Rcpt dte="07-28-17" No="6002">
   <amnt>33</amnt>
   <descrpt>"07/17" upkeep 1</descrpt>
  </Rcpt>
  <Rcpt dte="08-02-17" No="6017">
   <amnt>12</amnt>
   <descrpt>"07/17" upkeep 2</descrpt>
  </Rcpt>
 </upkShare>
</upkeepList>

并通过一些.xslt转换,我想以这种方式显示它:

<html>
 <head>
  <meta http-equiv="content-type" content="text/html; charset=utf-8">
  <title>apartment's building monthly maintenance allowances share bills 
  </title>
 </head>
 <body>
  <h3> apartment's monthly maintenance share bills (2017) </h3> 
  <table border="1" width="56%" style="text-align:center; margin-left:65px; border-collapse:collapse; margin-top:22px">
 <tr> <th>PostDate</th> <!-- maintanance upkeep bills post date --> 
 <th>OpngBalnce</th> <!-- opening balance - OB (starting from 2nd line this OB will read previous CB-->
 <th>MnthCrrntAmnt</th> <!-- monthly current upkeep amount to pay - MUPA -->
 <th>TotAmntToPay</th> <!-- total amount to pay - TAP = OB + MUPA --> 
 <th>TotAmntPd</th> <!-- total amount paid (receipts sum) - TAPD -->
 <th>ClsngBalnce</th> <!-- closing balance CB = TAP - TAPD -->
</tr> 
<tr> <td>01-20-17</td> <!-- PostDate -->
 <td>22</td> <!-- OB initially is 22 -->
 <td>77</td> <!-- MUPA -->
 <td>99</td> <!-- TAP = OB + MUPA -->
 <td>63</td> <!-- TAPD -->
 <td>36</td> <!-- CB = TAP - TAPD -->
</tr>
<tr> <!-- 2nd row -->
 <td>03-17-17</td> 
 <td>36</td> 
 <td>74</td> 
 <td>110</td> 
 <td>50</td> 
 <td>60</td> 
</tr>
<tr> <!-- 3rd row -->
 <td>04-16-17</td> 
 <td>60</td> 
 <td>55</td> 
 <td>115</td> 
 <td>49</td> 
 <td>66</td> 
</tr>
<tr> <!-- 4th row -->
 <td>06-05-17</td> 
 <td>66</td> 
 <td>64</td> 
 <td>130</td> 
 <td>58</td> 
 <td>72</td> 
</tr>
<tr><!-- 5th row -->
 <td>07-16-17</td> 
 <td>72</td> 
 <td>45</td> 
 <td>117</td> 
 <td>38</td> 
 <td>79</td> 
</tr>
<tr><!-- 6th row -->
 <td>08-16-17</td> <!-- PostData -->
 <td>79</td> <!-- OB = prev CB -->
 <td>54</td> <!-- MUPA -->
 <td>133</td> <!-- TAP = OB + MUPA -->
 <td>43</td> <!-- TAPD -->
 <td>90</td> <!-- CB = TAP - TAPD -->
</tr>
</table>
</body>
</html>

这是一个公寓大楼的每月维修津贴账单,我需要通过对该.xml文档的xslt转换来显示。

每间公寓都有一些公寓大楼共享账单,需要将其过帐。要建立的维护清单..人们知道他们必须为当月消费的公用事业支付多少费用。  用水/消耗量主要... 前面的表首字母缩写词的含义都将跟随(我将再次重复)。

OB =期初余额或初始余额;这是一个固定值,通过它我可以打开第1行的示例;从第二行开始,此OB与先前的期末余额(CB)相同。        例如:第2行的OB是第1行的CB(36)            第3行的OB是第2行的CB,依此类推(60);

MUPA =每月支付的当前保养金额;这是一个人应该为他/她使用的物品支付的保养费用;

TAP =总付款额; TAP = OB + MUPA-这是一个人要支付的总金额;

TAPD =支付的总金额(收款额);一个会用一张,两张甚至三张收据来支付一定的金额     已支付的所有收据的总和为已支付的总金额(TAPD);

CB =期末余额(CB)或应付款是从TAP中减去TAPD后的剩余金额(CB = TAP-TAPD)

诀窍在于,我只是想不出我应该如何将上一个CB带到下一行OB。

1 个答案:

答案 0 :(得分:0)

请考虑以下简化示例:

这里的目标是产生类似于银行对账单的输出,其中每笔交易都是具有先前余额,金额和运行总额的一行。

转换过程分为两步:

  1. 首先,按日期对事务进行排序(此处,通过使用可以按文本排序的ISO-8601日期简化了任务),并且所有缺失值都被强制为零;

    < / li>
  2. 接下来,处理已排序的值,并通过对所有先前的交易值求和来生成先前的余额。这不是一种有效的方法-但由于它的简单性,对于相对少量的数据,它可能很方便。

XML

<transactions>
    <transaction>
        <date>2019-01-01</date>
        <opening-balance>100</opening-balance>
        <amount/>
    </transaction>
    <transaction>
        <date>2019-03-03</date>
        <opening-balance/>
        <amount>33</amount>
    </transaction>
    <transaction>
        <date>2019-02-02</date>
        <opening-balance/>
        <amount>-22</amount>
    </transaction>
    <transaction>
        <date>2019-05-05</date>
        <opening-balance/>
        <amount>55</amount>
    </transaction>
    <transaction>
        <date>2019-04-04</date>
        <opening-balance/>
        <amount>-44</amount>
    </transaction>
</transactions>

XSLT 1.0(+ EXSLT)

<xsl:stylesheet version="1.0" 
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:exsl="http://exslt.org/common"
extension-element-prefixes="exsl">
<xsl:output method="xml" version="1.0" encoding="UTF-8" indent="yes"/>
<xsl:strip-space elements="*"/>

<xsl:decimal-format name="coerce" NaN="0" />

<xsl:template match="/transactions">
    <!-- FIRST PASS: SORT TRANSACTIONS BY DATE -->
    <xsl:variable name="txs">
        <xsl:for-each select="transaction">
            <xsl:sort select="date"/>
            <!-- COERCE MISSING VALUES TO ZERO -->
            <tx date="{date}" 
                opening-balance="{format-number(opening-balance, '#', 'coerce')}"
                amount="{format-number(amount, '#', 'coerce')}"/>
        </xsl:for-each>
    </xsl:variable>
    <!-- OUTPUT -->
    <statement>
        <xsl:for-each select="exsl:node-set($txs)/tx">
            <line>
                <date>
                    <xsl:value-of select="@date"/>
                </date>
                <xsl:variable name="prev-balance" select="sum(preceding-sibling::tx/@opening-balance) + sum(preceding-sibling::tx/@amount) + @opening-balance" />
                <previous-balance>
                    <xsl:value-of select="$prev-balance"/>
                </previous-balance>
                <amount>
                    <xsl:value-of select="@amount"/>
                </amount>
                <run-total>
                    <xsl:value-of select="@amount + $prev-balance"/>
                </run-total>
            </line>
        </xsl:for-each>
    </statement>
</xsl:template>

</xsl:stylesheet>

结果

<?xml version="1.0" encoding="UTF-8"?>
<statement>
  <line>
    <date>2019-01-01</date>
    <previous-balance>100</previous-balance>
    <amount>0</amount>
    <run-total>100</run-total>
  </line>
  <line>
    <date>2019-02-02</date>
    <previous-balance>100</previous-balance>
    <amount>-22</amount>
    <run-total>78</run-total>
  </line>
  <line>
    <date>2019-03-03</date>
    <previous-balance>78</previous-balance>
    <amount>33</amount>
    <run-total>111</run-total>
  </line>
  <line>
    <date>2019-04-04</date>
    <previous-balance>111</previous-balance>
    <amount>-44</amount>
    <run-total>67</run-total>
  </line>
  <line>
    <date>2019-05-05</date>
    <previous-balance>67</previous-balance>
    <amount>55</amount>
    <run-total>122</run-total>
  </line>
</statement>

一种更有效的方法是使用所谓的 sibling recursion 方法来消除相同节点一遍又一遍的重复求和:

XSLT 1.0(+ EXSLT)

<xsl:stylesheet version="1.0" 
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:exsl="http://exslt.org/common"
extension-element-prefixes="exsl">
<xsl:output method="xml" version="1.0" encoding="UTF-8" indent="yes"/>
<xsl:strip-space elements="*"/>

<xsl:decimal-format name="coerce" NaN="0" />

<xsl:template match="/transactions">
    <!-- FIRST PASS: SORT TRANSACTIONS BY DATE -->
    <xsl:variable name="txs">
        <xsl:for-each select="transaction">
            <xsl:sort select="date"/>
            <!-- COERCE MISSING VALUES TO ZERO -->
            <tx date="{date}" 
                opening-balance="{format-number(opening-balance, '#', 'coerce')}"
                amount="{format-number(amount, '#', 'coerce')}"/>
        </xsl:for-each>
    </xsl:variable>
    <!-- OUTPUT -->
    <statement>
        <!-- PROCESS THE FIRST TRANSACTION -->
        <xsl:apply-templates select="exsl:node-set($txs)/tx[1]"/>
    </statement>
</xsl:template>

<xsl:template match="tx">
    <xsl:param name="balance" select="0"/>
    <xsl:variable name="prev-balance" select="$balance + @opening-balance" />
    <xsl:variable name="run-total" select="$prev-balance + @amount" />
    <line>
        <date>
            <xsl:value-of select="@date"/>
        </date>
        <previous-balance>
            <xsl:value-of select="$prev-balance"/>
        </previous-balance>
        <amount>
            <xsl:value-of select="@amount"/>
        </amount>
        <run-total>
            <xsl:value-of select="$run-total"/>
        </run-total>
    </line>
    <!-- PROCESS THE NEXT TRANSACTION -->
    <xsl:apply-templates select="following-sibling::tx[1]">
        <xsl:with-param name="balance" select="$run-total"/>
    </xsl:apply-templates>
</xsl:template>     

</xsl:stylesheet>