spring mvc 可以修剪从表单中获取的所有字符串吗？
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Can spring mvc trim all strings obtained from forms?
提问by Gordian Yuan
I know struts2 default config will trim all strings obtained from forms.
我知道 struts2 默认配置将修剪从表单中获取的所有字符串。
For example:
例如：
I type
我打字
" whatever "以表格形式提交，我会得到
"whatever"字符串已被自动修剪
Does spring mvc have this function too? THX.
spring mvc 也有这个功能吗？谢谢。
回答by Janning
Using Spring 3.2 or greater:
使用 Spring 3.2 或更高版本：
@ControllerAdvice
public class ControllerSetup
{
@InitBinder
public void initBinder ( WebDataBinder binder )
{
StringTrimmerEditor stringtrimmer = new StringTrimmerEditor(true);
binder.registerCustomEditor(String.class, stringtrimmer);
}
}
Testing with an MVC test context:
使用 MVC 测试上下文进行测试：
@RunWith(SpringJUnit4ClassRunner.class)
@WebAppConfiguration
@ContextConfiguration
public class ControllerSetupTest
{
@Autowired
private WebApplicationContext wac;
private MockMvc mockMvc;
@Before
public void setup ( )
{
this.mockMvc = MockMvcBuilders.webAppContextSetup(this.wac).build();
}
@Test
public void stringFormatting ( ) throws Exception
{
MockHttpServletRequestBuilder post = post("/test");
// this should be trimmed, but only start and end of string
post.param("test", " Hallo Welt ");
ResultActions result = mockMvc.perform(post);
result.andExpect(view().name("Hallo Welt"));
}
@Configuration
@EnableWebMvc
static class Config
{
@Bean
TestController testController ( )
{
return new TestController();
}
@Bean
ControllerSetup controllerSetup ( )
{
return new ControllerSetup();
}
}
}
/**
* we are testing trimming of strings with it.
*
* @author janning
*
*/
@Controller
class TestController
{
@RequestMapping("/test")
public String test ( String test )
{
return test;
}
}
And - as asked by LppEdd - it works with passwords too as on the server side there is no difference between input[type=password] and input[type=text]
并且 - 正如 LppEdd 所要求的 - 它也适用于密码，因为在服务器端 input[type=password] 和 input[type=text] 之间没有区别
回答by Lonre Wang
register this property editor:
org.springframework.beans.propertyeditors.StringTrimmerEditor
注册这个属性编辑器：
org.springframework.beans.propertyeditors.StringTrimmerEditor
Example for AnnotionHandlerAdapter:
AnnotionHandlerAdapter 示例：
<bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
...
<property name="webBindingInitializer">
<bean class="org.springframework.web.bind.support.ConfigurableWebBindingInitializer">
<property name="propertyEditorRegistrar">
<bean class="org.springframework.beans.propertyeditors.StringTrimmerEditor" />
</property>
</bean>
</property>
...
</bean>
回答by Patrick
You can also use Spring's conversion service, which has the added benefit of working with <mvc:annotation-driven/>and with Spring Webflow. As with the other answers, the major downside is that this is a global change and can't be disabled for certain forms.
您还可以使用 Spring 的转换服务，它具有<mvc:annotation-driven/>与 Spring Webflow一起工作的额外好处。与其他答案一样，主要的缺点是这是一个全局变化，不能对某些形式禁用。
You'll need a converter to do the trimming
您需要一个转换器来进行修剪
public class StringTrimmingConverter implements Converter<String, String> {
@Override
public String convert(String source) {
return source.trim();
}
}
Then define a conversion service that knows about your converter.
然后定义一个了解您的转换器的转换服务。
<bean id="applicationConversionService" class="org.springframework.format.support.FormattingConversionServiceFactoryBean">
<property name="converters">
<list>
<bean class="mypackage.util.StringTrimmingConverter"/>
</list>
</property>
</bean>
and tie that in to mvc.
并将其绑定到 mvc。
<mvc:annotation-driven conversion-service="applicationConversionService"/>
If you use Spring Webflow then it require a wrapper
如果您使用 Spring Webflow 那么它需要一个包装器
<bean id="defaultConversionService" class="org.springframework.binding.convert.service.DefaultConversionService">
<constructor-arg ref="applicationConversionService"/>
</bean>
and a setting on your flow builder
以及您的流程构建器上的设置
<flow:flow-builder-services id="flowBuilderServices" conversion-service="defaultConversionService" development="true" validator="validator" />
回答by Sarvar Nishonboev
Just customized the above code in order to adjust to Spring Boot, if you want to explicit trim function for some fields in the form, you can show them as below:
上面的代码只是为了适应Spring Boot而定制的，如果你想对表单中的某些字段进行显式修剪功能，可以如下所示：
@Component
@ControllerAdvice
public class ControllerSetup {
@InitBinder({"dto", "newUser"})
public void initBinder(WebDataBinder binder) {
binder.registerCustomEditor(String.class, new StringTrimmerEditor(true));
binder.registerCustomEditor(String.class, "userDto.username", new StringTrimmerEditor(false));
binder.registerCustomEditor(String.class, "userDto.password", new DefaultStringEditor(false));
binder.registerCustomEditor(String.class, "passwordConfirm", new DefaultStringEditor(false));
}
}
回答by Arthur Ronald
You can user a Spring-MVC Interceptor
您可以使用 Spring-MVC 拦截器
public class TrimInterceptor extends HandlerInterceptorAdapter {
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
Enumeration<String> e = request.getParameterNames();
while(e.hasMoreElements()) {
String parameterName = e.nextElement();
request.setParameter(parameterName, request.getParameter(parameterName).trim());
}
return true;
}
And set up your HandlerMapping interceptors property
并设置您的 HandlerMapping 拦截器属性
<bean id="interceptorTrim" class="br.com.view.interceptor.TrimInterceptor"/>
<bean class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping" p:interceptors-ref="interceptorTrim"/>
}
Or use a Servlet Filter
或者使用 Servlet 过滤器
回答by Jaille Chen
first，trim requestparam which is String，you can create a class and implimplements WebBingdingInitializer
首先，修剪 requestparam 是 String，你可以创建一个类并实现 WebBingdingInitializer
@ControllerAdvice
public class CustomWebBindingInitializer implements WebBindingInitializer {
@InitBinder
@Override
public void initBinder(WebDataBinder webDataBinder, WebRequest webRequest) {
webDataBinder.registerCustomEditor(String.class, new StringTrimmerEditor(true));
}
}
please use componentScan make this Class to be a Spring Bean.
请使用 componentScan 使这个类成为 Spring Bean。
But, I don't know how to trim the String value in requestBody JSON data.
但是，我不知道如何修剪 requestBody JSON 数据中的 String 值。
