Struts2页面调转设置

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#struts2.0 #页面调转 #前后台传值 #动态模式

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本文介绍了一个基于Struts2框架实现的简单用户登录注册系统。通过创建JSP页面、JavaBean、Action类及配置Struts.xml文件，实现了用户注册、登录及首页展示的功能。文章详细展示了每个步骤的代码实现。

1.在Web-INF/jsp新建index.jsp,reg.jsp,login.jsp文件

<%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>reg.jsp</title>
</head>
<body>
Reg !
<hr>
    <form action="user!getReg.action" method="get">
        用户名：<input type="text" name="username"><br> 
        密码：<input type="password" name="password"><br> 
        确认密码：<input type="password" name="con_passward"><br> 
        <input
            type="submit" value="注册">
    </form>
</body>
</html>

提交到user!getReg.action

<%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>login.jsp</title>
</head>
<body>
    Login !
    <hr>
 <h4>${msg }欢迎你  ${username }</h4>
    <form action="user!toIndex.action" method="get">

        用户名：<input type="text" name="username"><br> 
        密码：<input type="password" name="passward"><br> 
        <input
            type="submit">
    </form>
</body>
</html>

跳转到user!toIndex.action

<%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>index.jsp</title>
</head>
<body>

Hello,Index !<br>

<hr>

</body>
</html>

2，使用一个bean接收注册信息,新建User.java

public class User {

    private String username;
    private String password;
    public User() {
        // TODO Auto-generated constructor stub
    }
    public User(String username, String password) {

        this.username = username;
        this.password = password;
    }
    public String getUsername() {
        return username;
    }
    public void setUsername(String username) {
        this.username = username;
    }
    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }
    @Override
    public String toString() {
        return "User [username=" + username + ", password=" + password + "]";
    }
}

3.在action包中新建UserAction处理jsp

import com.opensymphony.xwork2.ActionSupport;
import com.qishui.bean.User;

public class UserAction extends ActionSupport {

    private static final long serialVersionUID = 1L;
    //第一种方式，还可以使用域模型，把数据封装到user
    //后台向前台传值
    private String username;
    private String password;
    private String con_password;
    // 前台，向后台
    private String msg;

    // 接受参数
    public String getReg() {

        User user = new User(username, password);
        System.out.println(user);

        msg = "注册成功！";//当填完注册信息提交时，msg被赋值。

        return "toLogin";//在struts.xml中指向相关的jsp

    }

    public String toLogin() {

        System.out.println("toLogin");

        return "toLogin";

    }

    public String toReg() {

        System.out.println("toReg");

        return "toReg";

    }

    public String toIndex() {

        System.out.println("toIndex");

        return "index";

    }

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public String getCon_password() {
        return con_password;
    }

    public void setCon_password(String con_password) {
        this.con_password = con_password;
    }

    public String getMsg() {
        return msg;
    }

    public void setMsg(String msg) {
        this.msg = msg;
    }

}

4.在struts.xml中配置路径

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
    "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
    "http://struts.apache.org/dtds/struts-2.3.dtd">

<struts>

    <!-- 动态访问 -->
    <constant name="struts.enable.DynamicMethodInvocation" value="true" />
    <constant name="struts.devMode" value="true" />

    <package name="default" namespace="/" extends="struts-default">

        <!-- http://localhost:8888/Struts/user!toLogin.action -->
        <!-- 配置UserAction中的方法，以user开头格式如上 -->
        <action name="user" class="com.qishui.action.UserAction">
            <result name="toLogin">/WEB-INF/jsp/login.jsp</result>
            <result name="toReg">/WEB-INF/jsp/reg.jsp</result>
            <result name="index">/WEB-INF/jsp/index.jsp</result>
        </action>

    </package>
</struts>

5.访问效果

这里写图片描述

//以下的是采用不同方式对action的解析

6.使用不同方式相同效果

在UserAction.java中使用user包装

import com.opensymphony.xwork2.ActionSupport;
import com.qishui.bean.User;

public class UserAction extends ActionSupport {

    private static final long serialVersionUID = 1L;
    // 使用域模型，把数据封装到user
    // 后台向前台传值
    private User user;
    public User getUser() {
        return user;
    }

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

    private String con_password;
    // 前台，向后台
    private String msg;

    // 接受参数
    public String getReg() {

        System.out.println(user);

        msg = "注册成功！";// 当填完注册信息提交时，msg被赋值。

        return "toLogin";// 在struts.xml中指向相关的jsp

    }

    public String toLogin() {

        System.out.println("toLogin");

        return "toLogin";

    }

    public String toReg() {

        System.out.println("toReg");

        return "toReg";

    }

    public String toIndex() {

        System.out.println("toIndex");

        return "index";

    }

    public String getCon_password() {
        return con_password;
    }

    public void setCon_password(String con_password) {
        this.con_password = con_password;
    }

    public String getMsg() {
        return msg;
    }

    public void setMsg(String msg) {
        this.msg = msg;
    }

}

在reg.jsp中使用user.username和user.password对于在User中没有的属于不能使用域模型，不用改变，在UserAction中定义，并set,get方法即可。

<%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>reg</title>
</head>
<body>
Reg !
<hr>
    <form action="user!getReg.action" method="get">
        用户名：<input type="text" name="user.username"><br> 
        密码：<input type="password" name="user.password"><br> 
        确认密码：<input type="password" name="con_passward"><br> 
        <input
            type="submit" value="注册">
    </form>
</body>
</html>

7.设置静态访问路径

a,配置所有

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
    "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
    "http://struts.apache.org/dtds/struts-2.3.dtd">

<struts>

    <!-- 静态模式 -->
    <constant name="struts.enable.DynamicMethodInvocation" value="true" />
    <constant name="struts.devMode" value="false" />

    <package name="default" namespace="/" extends="struts-default">

<action name="user*" class="com.qishui.action.UserAction" 
    method="{1}"> 
    <result name="toLogin">/WEB-INF/jsp/login.jsp</result> 
    <result name="toReg">/WEB-INF/jsp/reg.jsp</result>
     <result name="index">/WEB-INF/jsp/index.jsp</result> 
    </action> 

    </package>
</struts>

i.将struts.devMode设置为false，对于他们相应的访问路径

http://localhost:8888/Struts/usertoReg.action
http://localhost:8888/Struts/usertoLogin.action
http://localhost:8888/Struts/usertoIndex.action

其中action中name表示一种样式，在访问路径前的样式，‘*’表示匹配所有，class表示要处理action的完整类名，method表示name中第一个所接过的第一个参数，如此method=“{1}{2}”表示可以接两个参数，而它的参数正是在result中匹配,而result中的name值正是UserAction中各个方法中返回的字符串！

ii:相应的在提交表单的时候action也要作出相应的改变
//在UserAction中使用的是域模型，相应的name，password也添加name.属性值

<%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>login.jsp</title>
</head>
<body>
    Login !
    <hr>
 <h4>${msg }欢迎你  ${user.username }</h4>
    <form action="usertoIndex.action" method="get">

        用户名：<input type="text" name="username"><br> 
        密码：<input type="password" name="passward"><br> 
        <input
            type="submit">
    </form>
</body>
</html>

<%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>reg</title>
</head>
<body>
Reg !
<hr>
    <form action="usertoLogin.action" method="get">
        用户名：<input type="text" name="user.username"><br> 
        密码：<input type="password" name="user.password"><br> 
        确认密码：<input type="password" name="con_passward"><br> 
        <input
            type="submit" value="注册">
    </form>
</body>
</html>

b.单个配置

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
    "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
    "http://struts.apache.org/dtds/struts-2.3.dtd">

<struts>

    <!-- 静态模式 -->
    <constant name="struts.enable.DynamicMethodInvocation" value="true" />
    <constant name="struts.devMode" value="false" />

    <package name="default" namespace="/" extends="struts-default">
    <action name="usertoLogin" class="com.qishui.action.UserAction" method="toLogin"> 
    <result name="toLogin">/WEB-INF/jsp/login.jsp</result> 
    </action> 

    <action 
    name="usertoReg" class="com.qishui.action.UserAction" method="toReg"> 
    <result name="toReg">/WEB-INF/jsp/reg.jsp</result> 
    </action> 

    <action 
    name="usertoIndex" class="com.qishui.action.UserAction" method="toIndex"> 
    <result name="index">/WEB-INF/jsp/index.jsp</result> 
    </action>
    </package>
</struts>