这几天忙着上课，太累了～ 明天写作业，陪老婆玩～一般的流程是，首先应该设置好 servlet映射，在web.xml里面

  <!-- Action Servlet Mapping --> <servlet-mapping>    <servlet-name>action</servlet-name>    <url-pattern>*.do</url-pattern>  </servlet-mapping>

.do被映射为一个action,这样jsp页面里的<form:form action="register.do">一类的path就被struts-config.xml里面的  

  <form-beans>    <form-bean name="registerForm" type="app.RegisterForm" />  </form-beans><action-mappings>      <action path="/register"              type="app.RegisterAction"              name="registerForm" >        <forward name="success" path="/success.html" />        <forward name="failure" path="/failure.html" />    </action>  </action-mappings>

所找到，通过name属性再去寻找form-bean，这样就把action和form-bean联系起来了，form-Bean的name和action的name一样！但是from-bean的类名可以和name属性不一样。只要表单向form-bean传递数据，就会生成一个form-bean的实例，此实例包含表单的所有字段，作为属性。然后action会进行相应处理。form-bean的源码

package app;import org.apache.struts.action.*;public class RegisterForm extends ActionForm {  protected String username;  protected String password1;  protected String password2;  public String getUsername () {return this.username;};  public String getPassword1() {return this.password1;};  public String getPassword2() {return this.password2;};    public void setUsername (String username) {this.username = username;};  public void setPassword1(String password) {this.password1 = password;};  public void setPassword2(String password) {this.password2 = password;};}

struts的心脏--action，逻辑处理的源码实现注意：perform 方法已经过时，应该采用execute()方法。客户自己继承action子类，必须重写execute()方法，因为action类在默认情况下返回 null

package app;import org.apache.struts.action.*;import javax.servlet.http.*;import java.io.*;public class RegisterAction extends Action {  public ActionForward perform (ActionMapping mapping,                                ActionForm form,                                HttpServletRequest req,                                HttpServletResponse res) {// ①Cast the form to the RegisterForm    RegisterForm rf = (RegisterForm) form;    String username = rf.getUsername();    String password1 = rf.getPassword1();    String password2 = rf.getPassword2();// ②Apply business logic    if (password1.equals(password2)) {      try {// ③Return ActionForward for success        UserDirectory.getInstance().setUser(username,password1);        return mapping.findForward("success");      } catch (UserDirectoryException e) {        return mapping.findForward("failure");      }    }// ④Return ActionForward for failure    return mapping.findForward("failure");  }}

本文可以运行的程序见附件～