You can bind form parameters to a domain model object even if the domain model object does not have setters. Just add a @ControllerAdvice class with an @InitBinder method that configures your application to field binding via the initDirectFieldAccess() method<\/p>\n
\npackage boottests.controllers;\n\nimport org.springframework.web.bind.WebDataBinder;\nimport org.springframework.web.bind.annotation.*;\n\n@ControllerAdvice\nclass BindingControllerAdvice {\n \n @InitBinder\n void initBinder(WebDataBinder binder) {\n binder.initDirectFieldAccess();\n }\n}\n<\/pre>\nHere’s how my domain model looks like:<\/p>\n
\npackage boottests;\n\npublic class Person {\n \n private final String firstname;\n private final String lastname;\n \n public Person(String firstname, String lastname) {\n this.firstname = firstname;\n this.lastname = lastname;\n }\n \n @Override\n public String toString() {\n return firstname + \" \" + lastname;\n }\n}\n<\/pre>\nAnd here’s my Controller:
<\/div> <\/div><\/p>\n\npackage boottests.controllers;\n\nimport org.springframework.stereotype.Controller;\nimport org.springframework.web.bind.annotation.*;\n\nimport boottests.Person;\n\n@Controller @RequestMapping(\"\/person\")\nclass PersonController {\n \n @GetMapping\n String postForm(Person person) {\n System.out.println(\"YYY \" + person + \" YYY\");\n return \"\/\";\n }\n}\n<\/pre>\nAnd of course, my form, on index.html:<\/p>\n
\n<form action=\"person\" > \nLastname: <input type=\"text\" name=\"lastname\"\/> <br\/> \nFirstname: <input type=\"text\" name=\"firstname\"\/> <br\/> \n<input type=\"submit\" value=\"Submit\"\/> \n<\/form>\n<\/pre>\nIf you run this on Spring Boot, you’ll see that the form parameters were correctly bound to the fields of the domain model.<\/p>\n
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