Spring How to get parameters from POST body

Question

Web-service using spring in which I have to get the params from the body of my post request  The content of the body is like -  source    mysource      amp json         items                            username    test1                allowed   true                                   username    test2                allowed   false                     And the web-service method looks like -   RequestMapping value     saveData   headers  Content-Type application json   method   RequestMethod POST       ResponseBody     public ResponseEntity lt Boolean gt  saveData  RequestBody String a  throws MyException           return new ResponseEntity lt Boolean gt  uiRequestProcessor saveData a  HttpStatus OK            Please let me know how do I get the params from the body  I can get the whole body in my string but I don t think that would be a valid approach  Please let me know how do I proceed further

User · Answer

You can bind the json to a POJO using MappingJacksonHttpMessageConverter   Thus your controller signature can read  -    public ResponseEntity lt Boolean gt  saveData  RequestBody RequestDTO req     Where RequestDTO needs to be a bean appropriately annotated to work with jackson serializing deserializing  Your  -servlet xml file should have the Jackson message converter registered in RequestMappingHandler as follows  -             lt list  gt       lt bean class  org springframework http converter json MappingJacksonHttpMessageConverter   gt      lt  list gt   lt  property gt   lt  bean gt

User · Answer

You can get param from request    ResponseBody public ResponseEntity lt Boolean gt  saveData HttpServletRequest request              HttpServletResponse response  Model model      String jsonString   request getParameter  json

User · Answer

You will need these imports     import javax servlet    import javax servlet http      And  if you re using Maven  you ll also need this in the dependencies block of the pom xml file in your project s base directory    lt dependency gt       lt groupId gt javax servlet lt  groupId gt       lt artifactId gt javax servlet-api lt  artifactId gt       lt version gt 3 0 1 lt  version gt       lt scope gt provided lt  scope gt   lt  dependency gt    Then the above-listed fix by Jason will work    ResponseBody     public ResponseEntity lt Boolean gt  saveData HttpServletRequest request          HttpServletResponse response  Model model           String jsonString   request getParameter  json

User · Answer

In class do like this  RequestMapping value    quot  saveData quot   method   RequestMethod POST   ResponseBody public ResponseEntity lt Boolean gt  saveData      HttpServletResponse response      Bean beanName   throws MyException       return new ResponseEntity lt Boolean gt  uiRequestProcessor saveData a   HttpStatus OK      In page do like this   lt form enctype  quot multipart form-data quot  action  quot  lt   request getContextPath    gt  saveData quot  method  quot post quot  name  quot saveForm quot  id  quot saveForm quot  gt   lt input type  quot text quot  value  quot   beanName userName   quot  id  quot username quot  name  quot userName quot    gt    lt  from gt

User · Answer

You can try using  RequestBodyParam   RequestMapping value     saveData   headers  Content-Type application json   method   RequestMethod POST   ResponseBody public ResponseEntity lt Boolean gt  saveData  RequestBodyParam String source  RequestBodyParam JsonDto json  throws MyException               https   github com LambdaExpression RequestBodyParam

User · Answer

You can get entire post body into a POJO  Following is something similar  RequestMapping      value      quot  api pojo edit quot          method   RequestMethod POST       produces    quot application json quot        consumes     quot application json quot     ResponseBody public Boolean editWinner   RequestBody Pojo pojo      Where each field in Pojo  Including getter setters  should match the Json request object that the controller receives

[java] Spring: How to get parameters from POST body?

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