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springboot 2.x工程，将jasypt升级到3.x–>3.0.3后，配置一个属性为加密，工程启动后报错如下
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Application Version:
Spring Boot Version: 2.4.2 (v2.4.2)
2021-02-12 19:05:06.093 INFO 45956 --- [ main] com.cube.CubeBootApplication : Starting CubeBootApplication using Java 1.8.0_181 on mymac.local with PID 45956 (/Users/chiwei/myspace/git_project/cube-project/target/classes started by chiwei in /Users/chiwei/myspace/git_project/cube-project)
2021-02-12 19:05:06.098 INFO 45956 --- [ main] com.cube.CubeBootApplication : The following profiles are active: dev
2021-02-12 19:05:07.951 INFO 45956 --- [ main] .s.d.r.c.RepositoryConfigurationDelegate : Multiple Spring Data modules found, entering strict repository configuration mode!
2021-02-12 19:05:07.956 INFO 45956 --- [ main] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data Redis repositories in DEFAULT mode.
2021-02-12 19:05:08.012 INFO 45956 --- [ main] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 18 ms. Found 0 Redis repository interfaces.
2021-02-12 19:05:08.391 INFO 45956 --- [ main] ptablePropertiesBeanFactoryPostProcessor : Post-processing PropertySource instances
2021-02-12 19:05:08.427 INFO 45956 --- [ main] c.u.j.EncryptablePropertySourceConverter : Converting PropertySource configurationProperties [org.springframework.boot.context.properties.source.ConfigurationPropertySourcesPropertySource] to AOP Proxy
2021-02-12 19:05:08.429 INFO 45956 --- [ main] c.u.j.EncryptablePropertySourceConverter : Converting PropertySource servletConfigInitParams [org.springframework.core.env.PropertySource$StubPropertySource] to EncryptablePropertySourceWrapper
2021-02-12 19:05:08.429 INFO 45956 --- [ main] c.u.j.EncryptablePropertySourceConverter : Converting PropertySource servletContextInitParams [org.springframework.core.env.PropertySource$StubPropertySource] to EncryptablePropertySourceWrapper
2021-02-12 19:05:08.430 INFO 45956 --- [ main] c.u.j.EncryptablePropertySourceConverter : Converting PropertySource systemProperties [org.springframework.core.env.PropertiesPropertySource] to EncryptableMapPropertySourceWrapper
2021-02-12 19:05:08.430 INFO 45956 --- [ main] c.u.j.EncryptablePropertySourceConverter : Converting PropertySource systemEnvironment [org.springframework.boot.env.SystemEnvironmentPropertySourceEnvironmentPostProcessor$OriginAwareSystemEnvironmentPropertySource] to EncryptableSystemEnvironmentPropertySourceWrapper
2021-02-12 19:05:08.430 INFO 45956 --- [ main] c.u.j.EncryptablePropertySourceConverter : Converting PropertySource random [org.springframework.boot.env.RandomValuePropertySource] to EncryptablePropertySourceWrapper
2021-02-12 19:05:08.430 INFO 45956 --- [ main] c.u.j.EncryptablePropertySourceConverter : Converting PropertySource Config resource 'file [config/application-dev.properties]' via location 'optional:file:./config/' [org.springframework.boot.env.OriginTrackedMapPropertySource] to EncryptableMapPropertySourceWrapper
2021-02-12 19:05:08.430 INFO 45956 --- [ main] c.u.j.EncryptablePropertySourceConverter : Converting PropertySource Config resource 'file [config/application.properties]' via location 'optional:file:./config/' [org.springframework.boot.env.OriginTrackedMapPropertySource] to EncryptableMapPropertySourceWrapper
2021-02-12 19:05:08.597 INFO 45956 --- [ main] c.u.j.filter.DefaultLazyPropertyFilter : Property Filter custom Bean not found with name 'encryptablePropertyFilter'. Initializing Default Property Filter
2021-02-12 19:05:08.889 INFO 45956 --- [ main] c.u.j.r.DefaultLazyPropertyResolver : Property Resolver custom Bean not found with name 'encryptablePropertyResolver'. Initializing Default Property Resolver
2021-02-12 19:05:08.893 INFO 45956 --- [ main] c.u.j.d.DefaultLazyPropertyDetector : Property Detector custom Bean not found with name 'encryptablePropertyDetector'. Initializing Default Property Detector
2021-02-12 19:05:09.360 INFO 45956 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 9276 (http)
2021-02-12 19:05:09.379 INFO 45956 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2021-02-12 19:05:09.379 INFO 45956 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.41]
2021-02-12 19:05:09.554 INFO 45956 --- [ main] o.a.c.c.C.[Tomcat].[localhost].[/cube] : Initializing Spring embedded WebApplicationContext
2021-02-12 19:05:09.554 INFO 45956 --- [ main] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 3319 ms
2021-02-12 19:05:09.811 INFO 45956 --- [ main] c.u.j.encryptor.DefaultLazyEncryptor : String Encryptor custom Bean not found with name 'jasyptStringEncryptor'. Initializing Default String Encryptor
2021-02-12 19:05:09.833 INFO 45956 --- [ main] c.u.j.c.StringEncryptorBuilder : Encryptor config not found for property jasypt.encryptor.algorithm, using default value: PBEWITHHMACSHA512ANDAES_256
2021-02-12 19:05:09.834 INFO 45956 --- [ main] c.u.j.c.StringEncryptorBuilder : Encryptor config not found for property jasypt.encryptor.key-obtention-iterations, using default value: 1000
2021-02-12 19:05:09.834 INFO 45956 --- [ main] c.u.j.c.StringEncryptorBuilder : Encryptor config not found for property jasypt.encryptor.pool-size, using default value: 1
2021-02-12 19:05:09.835 INFO 45956 --- [ main] c.u.j.c.StringEncryptorBuilder : Encryptor config not found for property jasypt.encryptor.provider-name, using default value: null
2021-02-12 19:05:09.835 INFO 45956 --- [ main] c.u.j.c.StringEncryptorBuilder : Encryptor config not found for property jasypt.encryptor.provider-class-name, using default value: null
2021-02-12 19:05:09.835 INFO 45956 --- [ main] c.u.j.c.StringEncryptorBuilder : Encryptor config not found for property jasypt.encryptor.salt-generator-classname, using default value: org.jasypt.salt.RandomSaltGenerator
2021-02-12 19:05:09.837 INFO 45956 --- [ main] c.u.j.c.StringEncryptorBuilder : Encryptor config not found for property jasypt.encryptor.iv-generator-classname, using default value: org.jasypt.iv.RandomIvGenerator
2021-02-12 19:05:09.838 INFO 45956 --- [ main] c.u.j.c.StringEncryptorBuilder : Encryptor config not found for property jasypt.encryptor.string-output-type, using default value: base64
2021-02-12 19:05:10.134 WARN 45956 --- [ main] ConfigServletWebServerApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.boot.context.properties.ConfigurationPropertiesBindException: Error creating bean with name 'myConfig': Could not bind properties to 'MyConfig' : prefix=cube.boot, ignoreInvalidFields=false, ignoreUnknownFields=true; nested exception is org.springframework.boot.context.properties.bind.BindException: Failed to bind properties under 'cube.boot.system-name' to java.lang.String
2021-02-12 19:05:10.138 INFO 45956 --- [ main] o.apache.catalina.core.StandardService : Stopping service [Tomcat]
2021-02-12 19:05:10.155 INFO 45956 --- [ main] ConditionEvaluationReportLoggingListener :
Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2021-02-12 19:05:10.219 ERROR 45956 --- [ main] o.s.b.d.LoggingFailureAnalysisReporter :
***************************
APPLICATION FAILED TO START
***************************
Description:
Failed to bind properties under 'cube.boot.system-name' to java.lang.String:
Reason: Failed to bind properties under 'cube.boot.system-name' to java.lang.String
Action:
Update your application's configuration
Failed to bind properties under ‘cube.boot.system-name’ to java.lang.String:
报错信息说明自定义的属性无法绑定到java.lang.String这个类型上，猜测基本是解密失败了，解不出完整的一个字符串；
网上搜索后基本要求将jasypt降级到2.x版本，亲测的确可行，application配置如下
jasypt.encryptor.password=mycmccsalt
jasypt.encryptor.algorithm= PBEWithMD5AndDESjasypt github主页上其实有这个问题的issue，还挺长的，认证看完就找到答案了
https://github.com/ulisesbocchio/jasypt-spring-boot/issues/154
因为3.x版本的默认加密算法变了，所以对应配置文件加密算法配置得修改，同时加密的方法也得用新的加密算法计算出加密字符串
对应新的配置文件内容如下：
jasypt.encryptor.password=mycmccsalt
jasypt.encryptor.iv-generator-classname=org.jasypt.iv.NoIvGenerator
jasypt.encryptor.algorithm=PBEWithMD5AndTripleDES
启动访问，问题解决。
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