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Spring Boot - inject @Autowired controller fields automatically as constructor arguments with Lombok
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In this short article, we would like to show how to use Lombok to automatically generate a constructor that gets all @Autowired controller fields as arguments.
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Quick solution:
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Note:
finalkeyword forces Lombok to add the field as controller argument,@__(@Autowired)tells Lombok to prefix arguments with@Autowiredannotation.
In the below example, Lombok will generate controller constructor with 2 arguments:
@Autowired RoleService roleService and @Autowired UserService userService.
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package com.example.controllers;2
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import lombok.RequiredArgsConstructor;4
import org.springframework.stereotype.Controller;5
import org.springframework.beans.factory.annotation.Autowired;6
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import com.example.services.RoleService;8
import com.example.services.UsersService;9
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(onConstructor = ()) // <---- required12
public class SomeController {13
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private final RoleService roleService; // <----- final makes it @Autowired in the contructor15
private final UsersService usersService; // <----- final makes it @Autowired in the contructor16
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// some code here ...18
}
