Has there been instances when you wished to exclude certain properties while generating JSON object from a POJO and felt we had no control over it? Recently I was stuck with the same requirement and that\u2019s what we are going to discuss in this blog post.<\/p>\n
Lets say, I have a \u201cUser\u201d class as given below and which of course has a password field too. We would never like it to be a exposed when rendered as JSON \/ XML.<\/p>\n
[code]<\/p>\n
class User { <\/p>\n
String firstName
\n String lastName
\n String email
\n String password
\n}<\/p>\n
User user = new User(firstName:\u201dfirst name\u201d,lastName:\u201dlast name\u201d,email:\u201dyour email\u201d,password:\u201dyour password\u201d)<\/p>\n
render user as JSON<\/p>\n
\/\/output
\n{\u201cfirstName\u201d:\u201dfirst name\u201d,\u201clastName\u201d:\u201dlast name\u201d,\u201demail\u201d:\u201dyour email\u201d,\u201dpassword\u201d:\u201dyour password\u201d}<\/p>\n
[\/code]<\/p>\n
So now the question is how to exclude this password from User Json? Well, after some research I found we could define the way JSON would get marshalled. We need to do two things for the same :<\/p>\n
1. Register the marshaller :<\/strong> [code] \/\/For XML [\/code]<\/p>\n 2. Define your own marshaller in the POJO :<\/strong><\/p>\n [code] String firstName JSON toJSON(json) { [\/code]<\/p>\n Voilla! Its that simple. Now, as you are expecting the output would be<\/p>\n [code]<\/p>\n {\u201cfirstName\u201d:\u201dfirst name\u201d,\u201demail\u201d:\u201dyour email\u201d,\u201dfullName\u201d:\u201dfirst name last name\u201d}<\/p>\n [\/code] Hope this helped.<\/p>\n Thank You, Has there been instances when you wished to exclude certain properties while generating JSON object from a POJO and felt we had no control over it? Recently I was stuck with the same requirement and that\u2019s what we are going to discuss in this blog post. Lets say, I have a \u201cUser\u201d class as given […]<\/p>\n","protected":false},"author":75,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"iawp_total_views":3},"categories":[7],"tags":[],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.tothenew.com\/blog\/wp-json\/wp\/v2\/posts\/14590"}],"collection":[{"href":"https:\/\/www.tothenew.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.tothenew.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.tothenew.com\/blog\/wp-json\/wp\/v2\/users\/75"}],"replies":[{"embeddable":true,"href":"https:\/\/www.tothenew.com\/blog\/wp-json\/wp\/v2\/comments?post=14590"}],"version-history":[{"count":0,"href":"https:\/\/www.tothenew.com\/blog\/wp-json\/wp\/v2\/posts\/14590\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.tothenew.com\/blog\/wp-json\/wp\/v2\/media?parent=14590"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.tothenew.com\/blog\/wp-json\/wp\/v2\/categories?post=14590"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.tothenew.com\/blog\/wp-json\/wp\/v2\/tags?post=14590"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\nIt could be done in BootStrap.groovy as given below :<\/p>\n
\n\/\/For JSON
\nJSON.registerObjectMarshaller(new org.codehaus.groovy.grails.web.converters.marshaller.json.InstanceMethodBasedMarshaller()) <\/p>\n
\nXML.registerObjectMarshaller(new org.codehaus.groovy.grails.web.converters.marshaller.xml.InstanceMethodBasedMarshaller()) <\/p>\n
\nclass User {<\/p>\n
\n String lastName
\n String email
\n String password<\/p>\n
\n json.build {
\n firstName(firstName)
\n email(email)
\n fullName(firstName+lastName)
\n }
\n }
\n}<\/p>\n
\nsame goes for the XML response.<\/p>\n
\nJeevesh Pandey<\/p>\n","protected":false},"excerpt":{"rendered":"