Struts2下处理表单数据

创建JavaWeb项目并编写action对象，处理表单提交的数据。

1.创建action对象

public class GreetingAction extends ActionSupport {
private static final long serialVersionUID = 1L;
private String username;
@Override
public String execute() throws Exception {
if(username == null ||"".equals(username)){
return ERROR;}
else{
return SUCCESS;}
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;}

}

2.配置struts.xml

<package name="myPackage" extends="struts-default">

    <action name="greeting" class="action.GreetingAction">

        <result name="success">success.jsp</result>

        <result name="error">error.jsp</result>

        

    </action>

3.创建success.jsp error.jsp index.jsp 分别显示信息

<form action="greeting.action" method="post">

请输入您的姓名:<input type="text" name="username">

<input type="submit" value="提交" >

</form>