Spring表单命令可以是Map吗？ [英] Can a Spring form command be a Map?

问题描述

Spring表单命令可以是Map吗？我通过扩展HashMap并使用 ['property'] 表示法引用属性来使我的命令成为Map，但它不起作用。

Can a Spring form command be a Map? I made my command a Map by extending HashMap and referenced the properties using the ['property'] notation but it didn't work.

命令：

public class MyCommand extends HashMap<String, Object> {
}

HTML表格：

Name: <form:input path="['name']" />

导致错误：

org.springframework.beans.NotReadablePropertyException: Invalid property '[name]' of bean class [com.me.MyCommand]: Bean property '[name]' is not readable or has an invalid getter method: Does the return type of the getter match the parameter type of the setter?

这是不允许的还是我的语法不正确？

Is this not allowed or do I have incorrect syntax?

推荐答案

Springn MVC命令需要使用JavaBeans命名conventins（即getXXX（）和setXXX（）），所以不能为此使用地图。

Springn MVC commands need to use JavaBeans naming conventins (ie getXXX() and setXXX()) so no you can't use a map for that.

另一种方法是让一个具有单一Map属性的bean，即：

One alternative is to have a bean with a single Map property ie:

public class MyCommand {
  private final Map<String, Object> properties = new HashMap<String, Object>();

  public Map<String, Object> getProperties() { return properties; }
  // setter optional
}

然后你可以这样做（不是100％肯定语法，但有可能）：

Then you can do something like this (not 100% sure on the syntax but it is possible):

Name: <form:input path="properties['name']" />

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