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如何在 freemarker 模板中创建下拉字段？下拉选项和值将从地图传递。这是从Controller传递的地图：

Map<String, Map<String, String>> codeTable = new HashMap<String,Map<String, String>>();
Map<String, String> codeTableValues = new HashMap<String,String>();
        codeTableValues.put("1", "US");
        codeTableValues.put("2", "UK");
        codeTableValues.put("3", "India");
        codeTableValues.put("4", "Ireland");
        codeTableValues.put("5", "Germany");
        codeTable.put("country", codeTableValues);

对于freemarker，我遇到spring.ftl并尝试使用formSingleSelect但无法理解它。FTL代码：

<#elseif field.@type="select">
                <@spring.bind "codeTable.country" />
                <@spring.formSingleSelect "country", codeTable.country, "" />
            </#if>

例外

FreeMarker template error: Method public org.springframework.web.servlet.support.BindStatus org.springframework.web.servlet.support.RequestContext.getBindStatus(java.lang.String) throws java.lang.IllegalStateException threw an exception when invoked on org.springframework.web.servlet.support.RequestContext object "org.springframework.web.servlet.support.RequestContext@1479ef9" with arguments of types [java.lang.String,]. See cause exception. The failing instruction (FTL stack trace): ---------- ==> #assign status = springMacroRequestCo... [in template "spring.ftl" in macro "bind" at line 74, column 17] #else [in template "spring.ftl" in macro "bind" at line 73, column 9] @spring.bind "codeTable.country" [in template "index.ftl" at line 31, column 33] #elseif field.@type = "select" [in template "index.ftl" at line 30, column 25]
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1 回答 1

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使用 构建下拉菜单spring.formSingleSelect。假设您有一个名为 的 Bean Vacccine。

public class Vaccine {

    private Long id;
    
    private String name;
    
    private String companyName;
    
    private Integer country;
    
    // Getter & Setter

}

国家地图如下...

Map<String, String> countryMap = new HashMap<>();
countryMap.put("1", "US");
countryMap.put("2", "UK");
countryMap.put("3", "India");
countryMap.put("4", "Ireland");
countryMap.put("5", "Germany");

然后你可以像下面这样绑定国家地图......

<@spring.formSingleSelect  'Vaccine.country', countryMap, 'class="form-control" ' />
于 2021-07-07T14:39:30.887 回答