查询字符串由Spring Framework解码 [英] Query String is decoded by Spring Framework

问题描述

我在这里有一个奇怪的问题，不知道这是否是错误。
该项目在Spring Framework下运行。

观点：$ b​​
$ b

 < form method =GET action =someUrl.htmenctype =application / x-www-form-urlencoded> 
 
< label>标签< / label> 
< input name =val1value =$ {val1}/> 
 ... 
<！ - 在此处提交按钮 - > 
< / form> 
  

控制器映射到 someUrl.htm 使用 SimpleUrlHandlerMapping

 < bean id =parameterMethodNameResolver
 class = org.springframework.web.servlet.mvc.multiaction.ParameterMethodNameResolver > < property name =methodParamNames> 
 ... 
< / bean> 
 
< bean id =handlerMapping
 class =org.springframework.web.servlet.handler.SimpleUrlHandlerMapping> 
< property name =urlDecodevalue =false/> 
< property name =mappings> 
<道具> 
< prop key =** / someUrl.htm> someController< / prop> 
< /道具> 
< / property> 
< / bean> 
  

我想将％作为 VAL1 。但是当我这样做时，以下代码将返回空值：

  request.getParameter（val1）; 
  

catalina.out显示：

警告：参数：字符解码失败。

我发现Spring解码查询字符串和 request.getQueryString（）返回 val1 =％但不是 val1 =％25 。

如何防止UrlDecoding在这里？

这是一个错误吗？请注意， urlDecode 参数设置为 false 。

<任何想法来解决这个问题，因为我真的需要使用字符如％& = 。

解决方案

你必须做的不是使用Spring的参数映射。创建一个过滤器，它将以原始格式读取查询字符串，自己解码，获取所需的值，并将它们添加到稍后可以在需要时读取的bean中。我对如何完成后一部分很模糊，因为Spring 2.0.5是旧的，我告诉你的任何东西都可能不适用于该版本。一个处于会话范围内的对象应该没问题。

I'm having a weird problem here, not sure if this is the bug though. The project is running under Spring Framework.

The view:

<form method="GET" action="someUrl.htm" enctype="application/x-www-form-urlencoded" >

    <label>Label</label>
    <input name="val1" value="${val1}" />
  ... 
      <!-- submit button here -->
</form>

Controller mappend to someUrl.htm using SimpleUrlHandlerMapping

<bean id="parameterMethodNameResolver"
        class="org.springframework.web.servlet.mvc.multiaction.ParameterMethodNameResolver">    <property name="methodParamNames">
            ...
</bean>

<bean id="handlerMapping"
        class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">    
        <property name="urlDecode" value="false" />
        <property name="mappings">
            <props>
                <prop key="**/someUrl.htm">someController</prop>
            </props>
        </property>
</bean>

I want to pass % as val1. But when I'm doing this, the following piece of code returns null:

request.getParameter("val1");

catalina.out shows:

WARNING: Parameters: Character decoding failed. Parameter 'val1' with value '%' has been ignored.

I find out that Spring decodes query string and request.getQueryString() returns val1=% but not val1=%25.

How to prevent UrlDecoding here?

Is that a bug? Please notice there is urlDecode parameter is set to false.

Any ideas to workaround the issue, because I really need to use chars like %&=.

解决方案

What you have to do is not use Spring's parameter map. Create a filter that will read the query string in its raw format, decode it yourself, get the values you need and add them to a bean that can be read later when you need it. I'm vague about how to do the latter part because Spring 2.0.5 is old and anything I tell you may not work in that version. An object that is in session scope should be fine.

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