Java 在bean-in-action类中存储表单值_Java_Jsp_Struts2

Java 在bean-in-action类中存储表单值

java jsp struts2

Java 在bean-in-action类中存储表单值,java,jsp,struts2,Java,Jsp,Struts2,假设我们有这样一个JSP： <s:form action="MyActionClass" namespace="/sec"> <s:hidden name="userId" value="%{userId}" <s:textfield name="name" value="%{name}" label="Name" /> <s:textfield name="location" value="%{location}" label="Lo

假设我们有这样一个JSP：

<s:form action="MyActionClass" namespace="/sec">
    <s:hidden name="userId" value="%{userId}"
    <s:textfield name="name" value="%{name}" label="Name" />
    <s:textfield name="location" value="%{location}" label="Location" />
</s:form>

public class MyActionClass extends ActionSupport {
    private String userId;
    private String name;
    private String location;
//getters and setters
}

这很好用，我在提交表单时从jsp获取操作字段中的值。我想做的是创建另一个bean类，将字段放在该bean类中，将bean类声明为action类的属性并填充其字段。像这样的

public class MyActionClass extends ActionSupport {
    private UserDTO user;
//getters and setters
}

public class UserDTO{
    private String userId;
    private String name;
    private String location;

public UserDTO(){
}
//getters and setters
}

UserDTO类如下所示

public class MyActionClass extends ActionSupport {
    private UserDTO user;
//getters and setters
}

public class UserDTO{
    private String userId;
    private String name;
    private String location;

public UserDTO(){
}
//getters and setters
}

我尝试过这样做：

 <s:form action="MyActionClass" namespace="/sec">
    <s:bean name="com.actions.DTOs.UserDTO" var="user">
       <s:hidden name="user.userId" value="%{user.userId}"
       <s:textfield name="user.name" value="%{user.name}" label="Name" />
       <s:textfield name="user.location" value="%{user.location}" label="Location" />
    </s:bean>
</s:form>


试试这个：
您的表单jsp：
<s:form action="MyActionClass" namespace="/sec">
    <s:textfield name="user.userId" value="" label="UserId" />
    <s:textfield name="user.name" value="" label="Name" />
    <s:textfield name="user.location" value="" label="Location" />
    <s:submit/>
</s:form>



MyActionClass.java：
public class MyActionClass extends ActionSupport implements ModelDriven<UserDTO>{

private UserDTO user;

public UserDTO getUser() {
    return user;
}


public void setUser(UserDTO user) {
    this.user = user;
}

@Override
public String execute() throws Exception {

    return SUCCESS;
}

}

公共类MyActionClass扩展ActionSupport实现模型驱动{
私人用户对用户；
public UserDTO getUser（）{
返回用户；
}
公共void setUser（UserDTO用户）{
this.user=用户；
}
@凌驾
公共字符串execute（）引发异常{
回归成功；
}
}

struts.xml配置：
<struts>

<constant name="struts.devMode" value="true"></constant>

<package name="mypackage" namespace="/sec" extends="struts-default">
    <action name="actionWhichResultsToYourFormJSPHere">
        <result>yourFormJspHere.jsp</result>
    </action>
    <action name="MyActionClass" class="sec.MyActionClass">

        <result name="success">/result.jsp</result>
    </action>
</package>
</struts>


yourFormJspHere.jsp
/result.jsp

您的result.jsp：
<body>
    id=${user.userId}<br>
    name=${user.name}<br>
    location=${user.location}<br>
</body>


id=${user.userId}

name=${user.name}

位置=${user.location}

bean类中的属性值将作为可能的副本返回