如何在Select Struts2中选择HashMap的值? [英] How to choose a value of a HashMap in select Struts2?

问题描述

我遇到了Struts2的问题.我有一个HashMap<String, Integer>，可以在带有 select 的表单中使用，以选择名称和该名称的对应ID.

I ran into a problem with Struts2. I have a HashMap<String, Integer> that I use in a form with a select to choose name and corresponding id to that name.

HashMap迭代并使用名称填充我的<select>列表.我只需要一个ID即可选择.如何选择ID/值而不是名称/键?

HashMap iterates and populates my <select>list with names. I only need an id to pick. How do I pick an id/value instead of a name/key?

companyMap是一个HashMap，其中<String, Integer>或键值.

companyMap is a HashMap, where <String, Integer> or key, value.

companyName是一个字符串.

<s:select label="Pick the company name" 
    headerKey="-1" headerValue="Select Company name"
    list="companyMap.keys" 
    name = "companyName"
/>

推荐答案

如果列表是Map(键，值)，则Map键将成为选项值"参数，而Map值将成为选项主体.

If the list is a Map (key, value), the Map key will become the option 'value' parameter and the Map value will become the option body.

但是您需要更改此规则

<s:select label="Pick the company name" 
    headerKey="-1" headerValue="Select Company name"
    list="%{companyMap.entrySet()}" 
    name = "companyId"
    listKey="value"
    listValue="key"
/>

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