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First you dont need to have @Valid annotation for those class variables in UpdatePrintContracts . You can delete them.

To trigger validation of a @Controller input, simply annotate the input argument as @Valid or @Validated:

@RequestMapping(value=PATH_PRINT_CONTRACTS, method=RequestMethod.POST)
public ResponseEntity<?> printContracts(@Valid @RequestBody  final UpdatePrintContracts updatePrintContracts) throws Exception {

Refer here for full understanding of validating models in spring boot.

Lastly i assume you have following jars in your classpath,

.validation-api.jar (contains the abstract API and the annotation scanner)

.hibernate-validator.jar (contains the concrete implementation)

First you dont need to have @Valid annotation for those class variables in UpdatePrintContracts . You can delete them.

To trigger validation of a @Controller input, simply annotate the input argument as @Valid or @Validated:

@RequestMapping(value=PATH_PRINT_CONTRACTS, method=RequestMethod.POST)
public ResponseEntity<?> printContracts(@Valid @RequestBody  final UpdatePrintContracts updatePrintContracts) throws Exception {

Refer here for full understanding of validating models in spring boot.

And If you want to check that a string contains only specific characters, you must add anchors (^ for beginning of the string, $ for end of the string) to be sure that your pattern matches all the string.Curly brackets are only to write a quantity,

@Pattern(regexp = "^[\\p{Alnum}]{1,32}$")

Lastly i assume you have following jars in your classpath,

.validation-api.jar (contains the abstract API and the annotation scanner)

.hibernate-validator.jar (contains the concrete implementation)

First you dont need to have @Valid annotation for those class variables in UpdatePrintContracts . You can delete them.

To trigger validation of a @Controller input, simply annotate the input argument as @Valid or @Validated:

@RequestMapping(value=PATH_PRINT_CONTRACTS, method=RequestMethod.POST)
public ResponseEntity<?> printContracts(@Valid @RequestBody  final UpdatePrintContracts updatePrintContracts) throws Exception {

Refer here for full understanding of validating models in spring boot.

First you dont need to have @Valid annotation for those class variables in UpdatePrintContracts . You can delete them.

To trigger validation of a @Controller input, simply annotate the input argument as @Valid or @Validated:

@RequestMapping(value=PATH_PRINT_CONTRACTS, method=RequestMethod.POST)
public ResponseEntity<?> printContracts(@Valid @RequestBody  final UpdatePrintContracts updatePrintContracts) throws Exception {

Refer here for full understanding of validating models in spring boot.

Lastly i assume you have following jars in your classpath,

.validation-api.jar (contains the abstract API and the annotation scanner)

.hibernate-validator.jar (contains the concrete implementation)

To trigger validation of a @Controller input, simply annotate the input argument as @Valid or @Validated:

@RequestMapping(value=PATH_PRINT_CONTRACTS, method=RequestMethod.POST)
public ResponseEntity<?> printContracts(@Valid @RequestBody  final UpdatePrintContracts updatePrintContracts) throws Exception {

Refer here for full understanding of validating models in spring boot.

First you dont need to have @Valid annotation for those class variables in UpdatePrintContracts . You can delete them.

To trigger validation of a @Controller input, simply annotate the input argument as @Valid or @Validated:

@RequestMapping(value=PATH_PRINT_CONTRACTS, method=RequestMethod.POST)
public ResponseEntity<?> printContracts(@Valid @RequestBody  final UpdatePrintContracts updatePrintContracts) throws Exception {

Refer here for full understanding of validating models in spring boot.