@Value注释用于从属性文件中读取Map

Question

我的Java有这个

validators={AlphabetValidator:'AlphabetValidator',NumberValidator:'NumberValidator'AlphaNumericValidator:'AlphaNumericValidator',DateValidator:'DateValidator', FixedLengthValidator:'FixedLengthValidator',MinimumLengthValidator:'MinimumLengthValidator',MaximumLengthValidator:'MaximumLengthValidator',CustomValidator:'CustomValidator' MandatoryFieldValidator: 'MandatoryFieldValidator',TimeValidator:'TimeValidator'}

属性文件有此

(a++-++b)

当我运行应用程序时..我收到此错误

  

线程“main”中的异常   org.springframework.beans.factory.UnsatisfiedDependencyException：   创建名为'validatorProperties'的bean时出错：不满意   通过字段'验证者'表达的依赖;嵌套异常是   org.springframework.beans.factory.BeanExpressionException：Expression   解析失败;嵌套异常是   org.springframework.expression.spel.SpelParseException：EL1041E：（pos   1）：解析有效表达式后，还有更多数据   表达式：'lcurly（{）'

Answer 1

您错过了在属性中指定一些逗号。尝试以下：

validators={AlphabetValidator:'AlphabetValidator',NumberValidator:'NumberValidator',AlphaNumericValidator:'AlphaNumericValidator',DateValidator:'DateValidator',FixedLengthValidator:'FixedLengthValidator',MinimumLengthValidator:'MinimumLengthValidator',MaximumLengthValidator:'MaximumLengthValidator',CustomValidator:'CustomValidator',MandatoryFieldValidator:'MandatoryFieldValidator',TimeValidator:'TimeValidator'}

Answer 2

请查看逗号＆＃39;，＆＃39;在属性文件中。

属性文件：

validators={AlphabetValidator:'AlphabetValidator',NumberValidator:'NumberValidator',AlphaNumericValidator:'AlphaNumericValidator',DateValidator:'DateValidator',FixedLengthValidator:'FixedLengthValidator',MinimumLengthValidator:'MinimumLengthValidator',MaximumLengthValidator:'MaximumLengthValidator',CustomValidator:'CustomValidator',MandatoryFieldValidator:'MandatoryFieldValidator',TimeValidator:'TimeValidator'}

Java代码：

@Value("#{${validators}}")
private Map<String,String> validators;