刚開始学习的人非常有用:struts2中将jsp数据传到action的几种方式
2024-08-24 20:14:56
先给上struts.xml代码:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.1//EN"
"http://struts.apache.org/dtds/struts-2.1.dtd">
<struts>
<package name="login" namespace="/user" extends="struts-default">
<action name="*_*" class="com.wepull.struts2.action.{1}Action"
method="{2}">
<result name="success">{1}_{2}.jsp</result>
<result name="input">User_toLogin.jsp</result>
</action>
</package>
</struts>
第一种传參方式:
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里加入属性,属性名要相应jsp上的属性名
* 2.加入相应的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,返回又一次登录
}
} public String toLogin(){
return SUCCESS; //进入登录页面
}
}
------------------------------------------------------------------------------------------------------------------------------
User_toLogin.jsp页面:
<form action="user/User_doLogin">
<table>
<tr>
<td>username</td>
<td><input type="text" name="name"></td>
<td> </td>
</tr>
<tr>
<td>密 码</td>
<td><input type="text" name="pass"></td>
<td> </td>
</tr>
<tr>
<td><input type="submit" value="sure" ></td>
<td><input type="reset" value="reset" ></td>
<td> </td>
</tr>
</table>
</form>
##########################################################################
另外一种传參方式:
import com.opensymphony.xwork2.ActionSupport;
/**
* 方式二:把属性封装到dto中，传值时以dto名字.当中属性
* 1.在Action里加入属性,属性名要相应jsp上的属性名
* 2.加入相应的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>username</td>
<td><input type="text" name="user.name"></td>
<td> </td>
</tr>
<tr>
<td>密 码</td>
<td><input type="text" name="user.pass"></td>
<td> </td>
</tr>
<tr>
<td><input type="submit" value="sure" ></td>
<td><input type="reset" value="reset" ></td>
<td> </td>
</tr>
</table>
</form>
##########################################################################
第三种传參方式:
import com.opensymphony.xwork2.ActionSupport;
import com.opensymphony.xwork2.ModelDriven;
/**
* 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>username</td>
<td><input type="text" name="name"></td>
<td> </td>
</tr>
<tr>
<td>密 码</td>
<td><input type="text" name="pass"></td>
<td> </td>
</tr>
<tr>
<td><input type="submit" value="sure" ></td>
<td><input type="reset" value="reset" ></td>
<td> </td>
</tr>
</table>
</form>
&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&
另外,在介绍一种通过HttpServletRequest request 传參方式
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參数的方式
*HttpServletRequest request 传參方式
*
*/
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;
}
}
在开发中最经常使用的就是DTO和实现ModelDriven两种。要掌握哟！~
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