I am evaluating spring boot with thymeleaf template engine. I am facing the problem of UTF8 character form posting problem.
For the simplest form.html post example :
<head>
<title>test</title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
</head>
<body>
<form th:action="@{/test/doPost}" method="post">
<input type="text" name="name" />
<button type="submit">submit</button>
</form>
And in the controller :
@Controller
@RequestMapping("/test")
public class TestController {
private Logger logger = LoggerFactory.getLogger(getClass());
@RequestMapping(value = "/form", method = RequestMethod.GET)
public String showForm() {
return "test/form";
}
@RequestMapping(value = "/doPost", method = RequestMethod.POST)
public String doPost(@RequestBody String body,
@RequestParam(value = "name", required = true) String name) {
logger.info("body = {}", body);
logger.info("name = {}", name);
return "redirect:/test/form";
}
}
Spring MVC (or thymeleaf) cannot correctly encode form with UTF-8 character in this example.
If I input ä , I'll see this log :
TestController - body = name=%C3%83%C2%A4
TestController - name = ä
ä should be encoded to %C3%A4 . the body should be name=%C3%A4 , but I don't know why it becomes %C3%83%C2%A4 and decoded to wrong characters.
I googled and found some solutions , such as adding an encoding filter :
@Bean
public Filter characterEncodingFilter() {
CharacterEncodingFilter characterEncodingFilter = new CharacterEncodingFilter();
characterEncodingFilter.setEncoding("UTF-8");
characterEncodingFilter.setForceEncoding(true);
return characterEncodingFilter;
}
But not working.
Another solution is to thymeleafViewResolver.setCharacterEncoding("UTF-8"); by this way :
@Bean
public SpringResourceTemplateResolver templateResolver() {
final SpringResourceTemplateResolver templateResolver = new SpringResourceTemplateResolver();
templateResolver.setCacheable(false);
templateResolver.setPrefix("classpath:/templates/");
templateResolver.setSuffix(".html");
templateResolver.setTemplateMode("HTML5");
return templateResolver;
}
@Bean
public SpringTemplateEngine springTemplateEngine() {
SpringTemplateEngine springTemplateEngine = new SpringTemplateEngine();
springTemplateEngine.setTemplateResolver(templateResolver());
return springTemplateEngine;
}
@Bean
public ThymeleafViewResolver viewResolver() {
ThymeleafViewResolver thymeleafViewResolver = new ThymeleafViewResolver();
thymeleafViewResolver.setTemplateEngine(springTemplateEngine());
thymeleafViewResolver.setCharacterEncoding("UTF-8");
return thymeleafViewResolver;
}
But it doesn't work , either.
Moreover , ThymeleafViewResolver's characterEncoding is already set in the ThymeleafAutoConfiguration source code . There seems no need to re-define UTF-8 here.
It seems I have similar situation with this question : UTF-8 encoding with form post and Spring Controller . The accepted solution is
Moving CharacterEncodingFilter to the top and forcing the encoding to be set as UTF-8 solved the problem.
I tried this :
@Bean
public FilterRegistrationBean filterRegistrationBean() {
FilterRegistrationBean registrationBean = new FilterRegistrationBean();
CharacterEncodingFilter characterEncodingFilter = new CharacterEncodingFilter();
characterEncodingFilter.setEncoding("UTF-8");
characterEncodingFilter.setForceEncoding(true);
registrationBean.setFilter(characterEncodingFilter);
registrationBean.setOrder(0);
return registrationBean;
}
But still not working.
I think UTF-8 form posting is very basic , but why it just cannot work here . Did I miss anything ?
environment :
<springboot.version>1.3.0.M5</springboot.version>
<spring.version>4.2.1.RELEASE</spring.version>
Thanks a lot.
A little off-topic : I've used many other frameworks , such as JSP/wicket/grails/play1/play2 , non of these have such annoying UTF-8 situation.
