Spring 2.5.6集成Jasypt解密加密密码失败求助

在Spring 2.5.6环境下使用Jasypt解密配置文件中的加密密码时，无任何日志报错；运行GitHub上的集成示例时抛出Exception in thread "main" org.jasypt.exceptions.EncryptionOperationNotPossibleException异常，以下是经过验证的可用实现代码及修正说明：

现有配置代码 #

pom.xml #

<!-- Spring framework -->
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring</artifactId>
    <version>2.5.6</version>
</dependency>

<dependency>
    <groupId>org.jasypt</groupId>
    <artifactId>jasypt-spring2</artifactId>
    <version>1.9.2</version>
</dependency>

Spring-datasource.xml #

<beans xmlns="http://www.springframework.org/schema/beans"
   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
   xmlns:context="http://www.springframework.org/schema/context"
   xmlns:encryption="http://www.jasypt.org/schema/encryption"
   xmlns:p="http://www.springframework.org/schema/p"
   xsi:schemaLocation="http://www.springframework.org/schema/beans
    http://www.springframework.org/schema/beans/spring-beans-2.5.xsd">

<bean id="environmentVariablesConfiguration"
      class="org.jasypt.encryption.pbe.config.EnvironmentStringPBEConfig">
    <property name="algorithm" value="PBEWithMD5AndDES" />
    <property name="password" value="APP_ENCRYPTION_PASSWORD" />
</bean>

<bean id="configurationEncryptor"
      class="org.jasypt.encryption.pbe.StandardPBEStringEncryptor">
    <property name="config" ref="environmentVariablesConfiguration" />
</bean>

<bean id="propertyConfigurer"
      class="org.jasypt.spring2.properties.EncryptablePropertyPlaceholderConfigurer">
    <constructor-arg ref="configurationEncryptor" />
    <property name="locations">
        <list>
            <value>classpath:properties/application.properties</value>
        </list>
    </property>

</bean>

<bean id="myClass" class="com.springjasypt.customer.MyClass">
    <property name="username" value="${my.class.username}" />
    <property name="password" value="${my.class.password}" />
</bean>
</beans>

application.properties #

my.class.password=ENC(piW7egF06tLgj3Dkji5U+sEmmdMjPMvA)
my.class.username=superman

加密密码命令 #

java -cp C:\reci\apps\tools\mavenpro\org\jasypt\jasypt\1.9.2\jasypt-1.9.2.jar org.jasypt.intf.cli.JasyptPBEStringEncryptionCLI password=APP_ENCRYPTION_PASSWORD algorithm=PBEWITHMD5ANDDES input=secretpassword*123*

修正后的可用代码 #

核心问题说明 #

原配置中EnvironmentStringPBEConfig的password属性是环境变量名称，而非直接的密码值。若未设置对应的系统环境变量APP_ENCRYPTION_PASSWORD，会导致解密失败。以下改用SimplePBEConfig直接配置参数（测试场景），生产环境可通过环境变量、JVM参数等安全方式注入密码。

修正后的Spring-datasource.xml #

<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans-2.5.xsd">

    <!-- 使用SimplePBEConfig明确配置加密参数 -->
    <bean id="simplePBEConfig" class="org.jasypt.encryption.pbe.config.SimplePBEConfig">
        <property name="algorithm" value="PBEWithMD5AndDES"/>
        <property name="password" value="APP_ENCRYPTION_PASSWORD"/> <!-- 与加密命令中的密码完全一致 -->
        <property name="keyObtentionIterations" value="1000"/>
        <property name="poolSize" value="1"/>
        <property name="providerName" value="SunJCE"/>
        <property name="saltGeneratorClassName" value="org.jasypt.salt.RandomSaltGenerator"/>
        <property name="stringOutputType" value="base64"/>
    </bean>

    <bean id="configurationEncryptor" class="org.jasypt.encryption.pbe.StandardPBEStringEncryptor">
        <property name="config" ref="simplePBEConfig"/>
    </bean>

    <bean id="propertyConfigurer" class="org.jasypt.spring2.properties.EncryptablePropertyPlaceholderConfigurer">
        <constructor-arg ref="configurationEncryptor"/>
        <property name="locations">
            <list>
                <value>classpath:properties/application.properties</value>
            </list>
        </property>
    </bean>

    <bean id="myClass" class="com.springjasypt.customer.MyClass">
        <property name="username" value="${my.class.username}"/>
        <property name="password" value="${my.class.password}"/>
    </bean>
</beans>

测试用MyClass代码 #

package com.springjasypt.customer;

public class MyClass {
    private String username;
    private String password;

    public void setUsername(String username) {
        this.username = username;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    // 打印解密后的密码验证结果
    public void printCredentials() {
        System.out.println("用户名: " + username);
        System.out.println("解密后的密码: " + password);
    }
}

主类测试代码 #

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import com.springjasypt.customer.MyClass;

public class MainApp {
    public static void main(String[] args) {
        ApplicationContext context = new ClassPathXmlApplicationContext("Spring-datasource.xml");
        MyClass myClass = (MyClass) context.getBean("myClass");
        myClass.printCredentials();
    }
}

内容的提问来源于stack exchange，提问作者glaciallakes