struts2中将jsp数据传到action的几种方式

先给上struts.xml代码:

<struts><package extends="struts-default" name="login" namespace="/user"> 
  
  <result name="success">{1}_{2}.jsp</result>
  <result name="input">User_toLogin.jsp</result>
  </action>
</package></struts>

第一种传参方式:

import com.opensymphony.xwork2.ActionSupport;
/**
 * 方式一:直接在action中写属性，然后写set、get方法
 * 1.在Action里添加属性,属性名要对应jsp上的属性名
 *  2.添加相应的set方法
 *
 */
public class UserAction extends ActionSupport {
private String name;
private String pass;
public String getName() {
 return name;
}
public void setName(String name) {
 this.name = name;
}
public String getPass() {
 return pass;
}
public void setPass(String pass) {
 this.pass = pass;
}
 
 
public String doLogin(){
 String forward=input;
 //System.out.println(name+ +pass);
 if(wepull.equalsIgnoreCase(name)&&123.equalsIgnoreCase(pass)){
  return SUCCESS;   //登录成功,返回成功页面
 }else{
  return forward;   //登录失败,返回重新登录
 }
}
 
public String toLogin(){
 return SUCCESS;       //进入登录页面
}
}

User_toLogin.jsp页面:

User_toLogin.jsp页面:
    <form action="user/User_doLogin">
     <table>
      <tr>
       <td>用户名</td>
       <td><input type="text" name="name"></td>
       <td>&nbsp;</td>
      </tr>
      <tr>
       <td>密 码</td>
       <td><input type="text" name="pass"></td>
       <td>&nbsp;</td>
      </tr>
      <tr>
       <td><input type="submit" value="sure" ></td>
       <td><input type="reset" value="reset" ></td>
       <td>&nbsp;</td>
      </tr>
     </table>
    </form>

##########################################################################

第二种传参方式:

import com.opensymphony.xwork2.ActionSupport;
/**
 * Struts2三种传参方式(从jsp页面传到Action)
 * 
 * 方式二:把属性封装到dto中，传值时以dto名字.其中属性
 * 1.在Action里添加属性,属性名要对应jsp上的属性名
 *  2.添加相应的set方法
 *
 */
public class UserAction extends ActionSupport {
 private UserDTO user;
 public UserDTO getUser() {
  return user;
 }
 public void setUser(UserDTO user) {
  this.user = user;
 }
 
 public String doLogin(){
  String forward="input";
  //System.out.println(user.getName()+" "+user.getPass());
  if("wepull".equalsIgnoreCase(user.getName())&&"123".equalsIgnoreCase(user.getPass())){
   return SUCCESS;  
  }else{
   return forward;
  }
 }
 
 public String toLogin(){
  return SUCCESS;
 }
}

------------------------------------------------------------------------------------------------------------------------------

UserDTO.java代码

public class UserDTO {
 private String id;
 private String name;
 private String pass;
 public String getId() {
  return id;
 }
 public void setId(String id) {
  this.id = id;
 }
 public String getName() {
  return name;
 }
 public void setName(String name) {
  this.name = name;
 }
 public String getPass() {
  return pass;
 }
 public void setPass(String pass) {
  this.pass = pass;
 }
}

------------------------------------------------------------------------------------------------------------------------------

User_toLogin.jsp页面:

    <form action="user/User_doLogin">
     <table>
      <tr>
       <td>用户名</td>
       <td><input type="text" name="user.name"></td>
       <td>&nbsp;</td>
      </tr>
      <tr>
       <td>密 码</td>
       <td><input type="text" name="user.pass"></td>
       <td>&nbsp;</td>
      </tr>
      <tr>
       <td><input type="submit" value="sure" ></td>
       <td><input type="reset" value="reset" ></td>
       <td>&nbsp;</td>
      </tr>
     </table>
    </form>

##########################################################################

第三种传参方式:

import com.opensymphony.xwork2.ActionSupport;
import com.opensymphony.xwork2.ModelDriven;
/**
 * Struts2三种传参方式(从jsp页面传到Action)
 * 
 * 方式三:实现ModelDriven
 * 实现ModelDriven接口
 *
 */
public class UserAction extends ActionSupport implements ModelDriven<UserDTO>{
 private UserDTO user;
 
 public UserDTO getUser() {
  return user;
 }
 public void setUser(UserDTO user) {
  this.user = user;
 }
 
 public String doLogin(){
  String forward="input";
  //System.out.println(user.getName()+" "+user.getPass());
  if("wepull".equalsIgnoreCase(user.getName())&&"123".equalsIgnoreCase(user.getPass())){
   return SUCCESS;  
  }else{
   return forward;
  }
 }
 
 public String toLogin(){
  return SUCCESS;
 }
 public UserDTO getModel() {
  if(user==null){
   user=new UserDTO();
  }
  return user;
 }
}

------------------------------------------------------------------------------------------------------------------------------

User_toLogin.jsp页面:

    <form action="user/User_doLogin">
     <table>
      <tr>
       <td>用户名</td>
       <td><input type="text" name="name"></td>
       <td>&nbsp;</td>
      </tr>
      <tr>
       <td>密 码</td>
       <td><input type="text" name="pass"></td>
       <td>&nbsp;</td>
      </tr>
      <tr>
       <td><input type="submit" value="sure" ></td>
       <td><input type="reset" value="reset" ></td>
       <td>&nbsp;</td>
      </tr>
     </table>
    </form>

&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&

另外,在介绍一种通过HttpServletRequest request  传参方式

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;

import org.apache.struts2.ServletActionContext;

import com.opensymphony.xwork2.ActionSupport;
import com.opensymphony.xwork2.ModelDriven;
/**
 * 获取request参数的方式
 *HttpServletRequest request  传参方式
 *
 */
public class UserAction extends ActionSupport{
 
 
 public String doLogin(){
  //获取request对象
  HttpServletRequest request=ServletActionContext.getRequest();
  //获取session对象
  //HttpSession session=request.getSession();
  String name=request.getParameter("name");
  String pass=request.getParameter("pass");
  String forward="input";
  if("wepull".equalsIgnoreCase(name)&&"123".equalsIgnoreCase(pass)){
   return SUCCESS;  
  }else{
   return forward;
  }
 }
 
 public String toLogin(){
  return SUCCESS;
 }

}