Question

我想显示一个编辑表单，用户可以在其中更改旧数据。所以我想用数据库中的值来预先形成表单？

请告诉我如何在struts2中执行此操作？

Answer 1

此拦截器对实现的操作调用prepare（）制备。这种拦截器对于任何情况都非常有用你需要确保在实际执行方法之前运行一些逻辑运行。

示例： Struts2 UI Tags similar to pre-population logic.

package com.examples;
public class RegistrationAction extends ActionSupport implements Preparable {

    @Override
    public void prepare() throws Exception {
        // get the data that you want to pre-populate
    }

    public String execute() {
        // you action logic
        return SUCCESS;
    }

}



<!-- Calls the params interceptor twice, allowing you to pre-load data for the second time parameters are set -->
<!-- don't forgot to add prepare interceptor to interceptor stack -->
 <action name="someAction" class="com.examples.RegistrationAction">
     <interceptor-ref name="params"/>
     <interceptor-ref name="prepare"/>
     <interceptor-ref name="basicStack"/>
     <result name="success">good_result.ftl</result>
 </action>

如何从数据库值预填充struts2中的表单

1 个答案: