I recently had to work with the Jakarta BeanUtils project and found it really useful. I think of it as BeanUseful. The BeanUtils project allows you to easily manipulate a JavaBean object using the static methods from the PropertyUtils class. Here is a simple example of how to update a property value of a JavaBean. Imagine I have a simple Greeting JavaBean class with a single property message.<\/p>\n
\r\nGreeting object = new Greeting();\r\nobject.setMessage("Hello");\r\n\/\/ ...\r\nString greeting = (String)PropertyUtils\r\n .getSimpleProperty(object, "message");\r\nPropertyUtils.setSimpleProperty(\r\n object, "message", greeting+", World!");\r\n<\/pre>\nOf course, object is an instance of a JavaBean with a property named message.<\/p>\n
PropertyUtils can also access an indexed method. Here is how you define an indexed property for a JavaBean:<\/p>\n
\r\npublic Item getItem(int index);\r\npublic void setItem(int index, Item item);\r\n<\/pre>\nAnd here is how you would access an index property using PropertyUtils:<\/p>\n
\r\nint index = ...;\r\nString name = "item[" + index + "]";\r\nItem item = (Item)PropertyUtils\r\n .getIndexedProperty(object, name);\r\n<\/pre>\nIn similar fashion, you can access a property that is mapped. Here is an example of how you define a mapped property in a JavaBean:<\/p>\n
\r\npublic Object getValue(String key);\r\npublic void setValue(String key, Object item);\r\n<\/pre>\nAnd here is how you would access a mapped property using PropertyUtils:<\/p>\n
\r\nPropertyUtils.setMappedProperty(\r\n object, "value("+key+")", value);\r\n<\/pre>\nThe BeanUtils project and Java Reflection in general, is best used in a dynamic setting when you do not know the type of a bean at compile time; that is the strength of Java Reflection, which BeanUtils builds on.<\/p>\n","protected":false},"excerpt":{"rendered":"
I recently had to work with the Jakarta BeanUtils project and found it really useful. I think of it as BeanUseful. The BeanUtils project allows you to easily manipulate a JavaBean object using the static methods from the PropertyUtils class. Here is a simple example of how to update a property value of a JavaBean. […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"spay_email":"","footnotes":""},"categories":[15,3],"tags":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/p902K-g","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"http:\/\/juixe.com\/techknow\/index.php\/wp-json\/wp\/v2\/posts\/16"}],"collection":[{"href":"http:\/\/juixe.com\/techknow\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/juixe.com\/techknow\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/juixe.com\/techknow\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/juixe.com\/techknow\/index.php\/wp-json\/wp\/v2\/comments?post=16"}],"version-history":[{"count":1,"href":"http:\/\/juixe.com\/techknow\/index.php\/wp-json\/wp\/v2\/posts\/16\/revisions"}],"predecessor-version":[{"id":799,"href":"http:\/\/juixe.com\/techknow\/index.php\/wp-json\/wp\/v2\/posts\/16\/revisions\/799"}],"wp:attachment":[{"href":"http:\/\/juixe.com\/techknow\/index.php\/wp-json\/wp\/v2\/media?parent=16"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/juixe.com\/techknow\/index.php\/wp-json\/wp\/v2\/categories?post=16"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/juixe.com\/techknow\/index.php\/wp-json\/wp\/v2\/tags?post=16"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}