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我正在使用具有以下依赖关系的 Spring Boot 中的套接字实现自定义 ISO8583 协议，我们已通过正确长度的所有必需数据元素

    <dependency>
        <groupId>net.sf.j8583</groupId>
        <artifactId>j8583</artifactId>
        <version>1.17.0</version>
    </dependency>

我的 xml 文件如下所示 -

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE j8583-config PUBLIC "-//J8583//DTD CONFIG 1.0//EN" "http://j8583.sourceforge.net/j8583.dtd">
<j8583-config>

    <!-- These are the ISO headers to be prepended to the message types specified -->
    <header type="0200">ISO015000050</header>
    <header type="0210">ISO015000055</header>
    <header type="0400">ISO015000050</header>
    <header type="0410">ISO015000055</header>
    <header type="0800">ISO015000015</header>
    <header type="0810">ISO015000015</header>
    <header type="0100">ISO015000050</header>
    <header type="0110">ISO015000055</header>



    <template type="0100">
        <!-- Membership Number -->
        <field num="2" type="LLVAR" length="19"></field>
        <!-- Transaction Amount -->
        <field num = "4" type="NUMERIC" length="12"></field>
        <!-- Expiration Date -->
        <field num="14" type="NUMERIC" length="4"/>
        <!-- Merchant Category Code -->
        <field num="18" type="NUMERIC" length="4"></field>
        <!-- Acquiring Institution country Code -->
        <field num="19" type="NUMERIC" length="3"></field>
        <!-- Acquiring Institution ID Code -->
        <field num="32" type="NUMERIC" length="6"></field>
        <!-- Terminal ID -->
        <field num="41" type="ALPHA" length="8"></field>
        <!-- Merchant ID -->
        <field num="42" type="ALPHA" length="15"></field>
        <!-- Merchant Name and Location -->
        <field num="43" type="LLVAR" length="40"></field>
        <!-- Transaction Currency Code -->
        <field num="49" type="NUMERIC" length="3"/>
        <!-- Transaction Fee Amount-->
        <field num="28" type="NUMERIC" length="9"/>

    </template>
    


    <!-- Transaction Request 100 -->

    <parse type="0100">
        <!-- Membership Number -->
        <field num="2" type="LLVAR" length="19"></field>
        <!-- Transaction Amount -->
        <field num = "4" type="NUMERIC" length="12"></field>
        <!-- Expiration Date -->
        <field num="14" type="NUMERIC" length="4"/>
        <!-- Merchant Category Code -->
        <field num="18" type="NUMERIC" length="4"></field>
        <!-- Acquiring Institution country Code -->
        <field num="19" type="NUMERIC" length="3"></field>
        <!-- Acquiring Institution ID Code -->
        <field num="32" type="NUMERIC" length="11"></field>
        <!-- Terminal ID -->
        <field num="41" type="ALPHA" length="8"/>
        <!-- Merchant ID -->
        <field num="42" type="ALPHA" length="15"></field>
        <!-- Merchant Name and Location -->
        <field num="43" type="LLVAR" length="40"></field>
        <!-- Transaction Currency Code -->
        <field num="49" type="NUMERIC" length="3"/>
        <!-- Transaction Fee Amount-->
        <field num="28" type="NUMERIC" length="8"/>


    </parse>

    <!-- Transaction Response 110  -->

    <parse type="0110">
        <!-- Membership Number -->
        <field num="2" type="LLVAR" length="19"></field>
        <!-- Transaction Amount -->
        <field num = "4" type="NUMERIC" length="12"></field>
        <!-- Expiration Date -->
        <field num="14" type="DATE4" length="4"/>
        <!-- Merchant Category Code -->
        <field num="18" type="NUMERIC" length="4"></field>
        <!-- Acquiring Institution country Code -->
        <field num="19" type="NUMERIC" length="3"></field>
        <!-- Acquiring Institution ID Code -->
        <field num="32" type="NUMERIC" length="11"></field>
        <!-- Terminal ID -->
        <field num="41" type="ALPHA" length="8"/>
        <!-- Merchant ID -->
        <field num="42" type="ALPHA" length="15"></field>
        <!-- Transaction Currency Code -->
        <field num="49" type="NUMERIC" length="3"/>
        <!-- Transaction Fee Amount-->
        <field num="28" type="NUMERIC" length="8"/>
        <!-- Merchant Name and Location -->

    </parse>
    
</j8583-config>

每当我们尝试在服务器上发送示例 ISO 消息时，我们都会遇到以下错误。

LLVAR 标头数据不足，位置 118

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