struts获得前台数据的三种方式
2016-04-14 18:33
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区别：比较以下的三种方式的例子，login.jsp页面中<input>标签中name属性的区别，还有Action与当有VO时的区别。
三种方法的web.xml文件和struts.xml基本一致
修改web.xml文件
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
<display-name>struts01</display-name>
<welcome-file-list>
<welcome-file>index.html</welcome-file>
<welcome-file>index.htm</welcome-file>
<welcome-file>index.jsp</welcome-file>
<welcome-file>default.html</welcome-file>
<welcome-file>default.htm</welcome-file>
<welcome-file>default.jsp</welcome-file>
</welcome-file-list>
<!-- 配置过滤器 -->
<filter>
<!-- 名称 -->
<filter-name>struts2</filter-name>
<!-- struts2核心类 -->
<filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
</filter>
<!-- 映射 -->
<filter-mapping>
<filter-name>struts2</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
</web-app>
配置struts.xml 文件，放在src文件下
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
<package name="default" namespace="/" extends="struts-default">
<!-- URL与Action的映射 -->
<action name="userAction" class="com.caokaiyuan.action.UserAction" method="execute">
<!-- 返回字符串与视图的映射 -->
<result name="success">success.jsp</result>
<result name="error">error.jsp</result>
</action>
</package>
</struts>
1、在action类中添加属性，生成getter 和setter方法 ,必须要与jsp页面中控制name属性对应的值一致
1-1、创建Action类
package com.caokaiyuan.action;
import com.opensymphony.xwork2.ActionSupport;
public class UserAction extends ActionSupport
{
private static final long serialVersionUID = 1L;
private String username;
private String password;
@Override
public String execute() throws Exception
{
if (username.equals("admin") && password.equals("admin"))
{
return "success";
}
else
{
return "error";
}
}
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;
}
}
1-2、登录界面
<%@ 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>Insert title here</title>
</head>
<body>
<form action="userAction" method="post">
<input type="text" name="username"/><br/>
<input type="password" name="password"><br/>
<input type="submit" value="提交">
</form>
</body>
</html>
2、抽取属性信息，存入到一个类中（vo对象） javaBean -- vo(参考页面中的信息来创建) ---- domain(参考数据库表中的字段来创建的)
2-1、创建UserVO类
package com.caokaiyuan.vo;
public class UserVO
{
private String username;
private String 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;
}
}
2-2、创建UserAction类
package com.caokaiyuan.action;
import com.caokaiyuan.vo.UserVO;
import com.opensymphony.xwork2.ActionSupport;
public class UserAction extends ActionSupport
{
private static final long serialVersionUID = 1L;
private UserVO user = new UserVO();
@Override
public String execute() throws Exception
{
if (user.getUsername().equals("admin") && user.getPassword().equals("admin"))
{
return "success";
}
else
{
return "error";
}
}
public UserVO getUser() {
return user;
}
public void setUser(UserVO user) {
this.user = user;
}
}
创建login.jsp页面
<%@ 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>Insert title here</title>
</head>
<body>
<form action="userAction" method="post">
<input type="text" name="user.username"/><br/>
<input type="password" name="user.password"><br/>
<input type="submit" value="提交">
</form>
</body>
</html>
3、通过领域模型接口来获取数据
3-1、创建UserVO类
package com.caokaiyuan.vo;
import java.io.Serializable;
public class UserVO implements Serializable
{
private static final long serialVersionUID = 1L;
private String username;
private String 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;
}
}
3-2、创建UserAction类
package com.caokaiyuan.action;
import com.caokaiyuan.vo.UserVO;
import com.opensymphony.xwork2.ActionSupport;
import com.opensymphony.xwork2.ModelDriven;
public class UserAction extends ActionSupport implements ModelDriven<UserVO>
{
private static final long serialVersionUID = 1L;
private UserVO user = new UserVO();
@Override
public String execute() throws Exception
{
if (user.getUsername().equals("admin") && user.getPassword().equals("admin"))
{
return "success";
}
else
{
return "error";
}
}
public UserVO getUser() {
return user;
}
public void setUser(UserVO user) {
this.user = user;
}
@Override
public UserVO getModel()
{
return user;
}
}
3-3、创建login.jsp页面
<%@ 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>Insert title here</title>
</head>
<body>
<form action="userAction" method="post">
<input type="text" name="username"><br/>
<input type="password" name="password"><br/>
<input type="submit" value="提交">
</form>
</body>
</html>
三种方法的web.xml文件和struts.xml基本一致
修改web.xml文件
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
<display-name>struts01</display-name>
<welcome-file-list>
<welcome-file>index.html</welcome-file>
<welcome-file>index.htm</welcome-file>
<welcome-file>index.jsp</welcome-file>
<welcome-file>default.html</welcome-file>
<welcome-file>default.htm</welcome-file>
<welcome-file>default.jsp</welcome-file>
</welcome-file-list>
<!-- 配置过滤器 -->
<filter>
<!-- 名称 -->
<filter-name>struts2</filter-name>
<!-- struts2核心类 -->
<filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
</filter>
<!-- 映射 -->
<filter-mapping>
<filter-name>struts2</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
</web-app>
配置struts.xml 文件，放在src文件下
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
<package name="default" namespace="/" extends="struts-default">
<!-- URL与Action的映射 -->
<action name="userAction" class="com.caokaiyuan.action.UserAction" method="execute">
<!-- 返回字符串与视图的映射 -->
<result name="success">success.jsp</result>
<result name="error">error.jsp</result>
</action>
</package>
</struts>
1、在action类中添加属性，生成getter 和setter方法 ,必须要与jsp页面中控制name属性对应的值一致
1-1、创建Action类
package com.caokaiyuan.action;
import com.opensymphony.xwork2.ActionSupport;
public class UserAction extends ActionSupport
{
private static final long serialVersionUID = 1L;
private String username;
private String password;
@Override
public String execute() throws Exception
{
if (username.equals("admin") && password.equals("admin"))
{
return "success";
}
else
{
return "error";
}
}
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;
}
}
1-2、登录界面
<%@ 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>Insert title here</title>
</head>
<body>
<form action="userAction" method="post">
<input type="text" name="username"/><br/>
<input type="password" name="password"><br/>
<input type="submit" value="提交">
</form>
</body>
</html>
2、抽取属性信息，存入到一个类中（vo对象） javaBean -- vo(参考页面中的信息来创建) ---- domain(参考数据库表中的字段来创建的)
2-1、创建UserVO类
package com.caokaiyuan.vo;
public class UserVO
{
private String username;
private String 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;
}
}
2-2、创建UserAction类
package com.caokaiyuan.action;
import com.caokaiyuan.vo.UserVO;
import com.opensymphony.xwork2.ActionSupport;
public class UserAction extends ActionSupport
{
private static final long serialVersionUID = 1L;
private UserVO user = new UserVO();
@Override
public String execute() throws Exception
{
if (user.getUsername().equals("admin") && user.getPassword().equals("admin"))
{
return "success";
}
else
{
return "error";
}
}
public UserVO getUser() {
return user;
}
public void setUser(UserVO user) {
this.user = user;
}
}
创建login.jsp页面
<%@ 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>Insert title here</title>
</head>
<body>
<form action="userAction" method="post">
<input type="text" name="user.username"/><br/>
<input type="password" name="user.password"><br/>
<input type="submit" value="提交">
</form>
</body>
</html>
3、通过领域模型接口来获取数据
3-1、创建UserVO类
package com.caokaiyuan.vo;
import java.io.Serializable;
public class UserVO implements Serializable
{
private static final long serialVersionUID = 1L;
private String username;
private String 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;
}
}
3-2、创建UserAction类
package com.caokaiyuan.action;
import com.caokaiyuan.vo.UserVO;
import com.opensymphony.xwork2.ActionSupport;
import com.opensymphony.xwork2.ModelDriven;
public class UserAction extends ActionSupport implements ModelDriven<UserVO>
{
private static final long serialVersionUID = 1L;
private UserVO user = new UserVO();
@Override
public String execute() throws Exception
{
if (user.getUsername().equals("admin") && user.getPassword().equals("admin"))
{
return "success";
}
else
{
return "error";
}
}
public UserVO getUser() {
return user;
}
public void setUser(UserVO user) {
this.user = user;
}
@Override
public UserVO getModel()
{
return user;
}
}
3-3、创建login.jsp页面
<%@ 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>Insert title here</title>
</head>
<body>
<form action="userAction" method="post">
<input type="text" name="username"><br/>
<input type="password" name="password"><br/>
<input type="submit" value="提交">
</form>
</body>
</html>
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