java.lang.IllegalArgumentException: Could not resolve placeholder ‘name’ in va"/>
springboot Caused by: java.lang.IllegalArgumentException: Could not resolve placeholder ‘name’ in va
springboot Caused by: java.lang.IllegalArgumentException: Could not resolve placeholder ‘name’ in value “${name}” 错误解决:
首先分享一位博主(smile_lg)的方法
springboot启动时会检索 @Value 对应配置文件中的key,当该key不存在时就会报:Caused by: java.lang.IllegalArgumentException: Could not resolve placeholder异常,解决方案有两种:
1,设置 @Value 的默认值
1 @Value("${name:default_name}")
2 private String name;
上面代码中,当配置文件中 name key 不存在时,就会使用“default_name”作为默认值,key 与默认值用“:”符号分割。
2,在 Application 类中设置PropertySourcesPlaceholderConfigurer类的默认属性
1 // 设置@Value注解取值不到忽略(不报错)
2 @Bean
3 public static PropertySourcesPlaceholderConfigurer placeholderConfigurer() {
4 PropertySourcesPlaceholderConfigurer c = new PropertySourcesPlaceholderConfigurer();
5 c.setIgnoreUnresolvablePlaceholders(true);
6 return c;
7 }
以上方法的原文点这里smile_lg的博客园
最后如果报"name"类型错误记得看日志提示改为相应类型
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