Strus2 页面传输数据到后台（普通属性传值，模型驱动传值，域对象传值，OGNL表达式传值）

清疚 2022-06-06 02:05 220阅读 0赞

**Strus2 页面传输数据到后台（普通属性传值，模型驱动传值，域对象传值）**

**1、普通属性传值：**

在页面中提交信息的名称和action类中设置对应的属性名一致，设置setter方法(建议都设置getter和setter方法)。

示例代码：

页面emp.jsp:

<%@ 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>数据从页面到后台（普通属性传值）</title>
    </head>
    <body>
    	<form action="emp/emp_insert.action" method="post">
    		<p>
    			编号：<input type="text" name="id">
    		</p>
    		<p>
    			姓名：<input type="text" name="name">
    		</p>
    		<p>
    			入职时间：<input type="text" name="hiredate">
    		</p>
    		
    		<p>
    			爱好： <input type="checkbox" name="hobby" value="足球" checked>足球
    			<input type="checkbox" name="hobby" value="篮球">篮球 <input
    				type="checkbox" name="hobby" value="乒乓球">乒乓球
    		</p>
    		
    		<p>
    			特长1：<input type="text" name="specialty['a']" />
    		</p>
    		<p>
    			特长2：<input type="text" name="specialty['b']" />
    		</p>
    		<input type="submit">
    	</form>
    
    </body>
    </html>

后台Action类：

package cn.sz.action;
    
    import java.util.Date;
    import java.util.Iterator;
    import java.util.Map;
    import java.util.Set;
    
    public class Emp2Action {
    	// 数据从页面到后台(普通属性传值),在action类中设置对应的属性(属性名一致)，设置setter方法,Map集合需要设置get方法
    	// 普通属性传值的操作
    	private Integer id;// 编号
    	private String name;// 姓名
    	private Date hiredate;// 入职时间
    	private Set<String> hobby;// 爱好（Set集合）
    	private Map<String, String> specialty;// 特长（Map集合）
    
    	public Map<String, String> getSpecialty() {
    		return specialty;
    	}
    
    	public void setSpecialty(Map<String, String> specialty) {
    		this.specialty = specialty;
    	}
    
    	public void setId(Integer id) {
    		this.id = id;
    	}
    
    	public void setName(String name) {
    		this.name = name;
    	}
    
    	public void setHiredate(Date hiredate) {
    		this.hiredate = hiredate;
    	}
    
    	public void setHobby(Set<String> hobby) {
    		this.hobby = hobby;
    	}
    
    	public String insert() {
    		// 输出接收到的内容
    		System.out.println(id + "," + name + "," + hiredate);
    		// 遍历爱好
    		for (String str : hobby) {
    			System.out.println(str);
    		}
    		// 遍历特长
    		Set<String> set = specialty.keySet();
    		Iterator<String> it = set.iterator();
    		while (it.hasNext()) {
    			String key = (String) it.next();
    			System.out.println(key + "," + specialty.get(key));
    		}
    
    		return "insert";
    	}
    
    }

**2、模型驱动传值：**  
借助实体类，将页面的数据直接通过框架封装到对象中，在action中获得对象，action需要实现一个接口 ModelDriven<E>

示例代码：

页面emp.jsp

实体类Emp

package cn.sz.vo;
    
    import java.util.Date;
    import java.util.Map;
    import java.util.Set;
    
    public class Emp {
    	
    	private Integer id;
    	private String name;
    	private Date hiredate;
    	private Set<String> hobby;
    	private Map<String, String> specialty;// 特长
    
    	public Map<String, String> getSpecialty() {
    		return specialty;
    	}
    
    	public void setSpecialty(Map<String, String> specialty) {
    		this.specialty = specialty;
    	}
    
    	public void setId(Integer id) {
    		this.id = id;
    	}
    
    	public void setName(String name) {
    		this.name = name;
    	}
    
    	public void setHiredate(Date hiredate) {
    		this.hiredate = hiredate;
    	}
    
    	public void setHobby(Set<String> hobby) {
    		this.hobby = hobby;
    	}
    
    	public Integer getId() {
    		return id;
    	}
    
    	public String getName() {
    		return name;
    	}
    
    	public Date getHiredate() {
    		return hiredate;
    	}
    
    	public Set<String> getHobby() {
    		return hobby;
    	}
    
    }

后台Action类

package cn.sz.action;
    
    import java.util.Iterator;
    import java.util.Set;
    
    import com.opensymphony.xwork2.ModelDriven;
    
    import cn.sz.vo.Emp;
    
    public class EmpAction implements ModelDriven<Emp> {
    	// 数据从页面到后台(模型驱动传值)
    	// 借助实体类，将页面的数据直接通过框架封装到对象中，在action中获得对象；注action需要实现ModelDriven接口
    	private Emp emp2 = new Emp();
    
    	public Emp getEmp2() {
    		return emp2;
    	}
    
    	public void setEmp2(Emp emp1) {
    		this.emp2 = emp1;
    	}
    
    	public String insert() {
    		// 测试模型驱动
    		System.out.println(emp2.getId() + "," + emp2.getName() + "," + emp2.getHiredate());
    		// 遍历爱好
    		for (String str : emp2.getHobby()) {
    			System.out.println(str);
    		}
    		// 遍历特长
    		Set<String> set = emp2.getSpecialty().keySet();
    		Iterator<String> it = set.iterator();
    		while (it.hasNext()) {
    			String key = (String) it.next();
    			System.out.println(key + "," + emp2.getSpecialty().get(key));
    		}
    
    		return "insert";
    	}
    
    	@Override
    	public Emp getModel() {
    		return this.emp2;
    	}
    
    }

**3、域对象传值：**  
域对象：范围对象 。application对应ServletContext， session对应HttpSession， request对应HttpServletRequest ， response对应HttpServletResponse

域对象获取有两种IOC方式和非IOC方式，下面演示的是非IOC方式。详细的资料查看 [http://blog.csdn.net/benxiaohai888/article/details/78374307][http_blog.csdn.net_benxiaohai888_article_details_78374307]

示例代码：

页面index.jsp：

后台Action类：

package cn.sz.action;
    
    import java.util.Date;
    
    import javax.servlet.ServletContext;
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    import javax.servlet.http.HttpSession;
    
    import org.apache.struts2.ServletActionContext;
    
    import cn.sz.vo.User;
    
    //数据从页面到后台，
    public class UserAction {
    	// 域对象传值方法（非IOC方式）
    	
    
    	public String insert() {
    		//非IOC方式获取域对象
    		ServletContext application = ServletActionContext.getServletContext();
    		HttpServletRequest request = ServletActionContext.getRequest();
    		HttpSession session = ServletActionContext.getRequest().getSession();
    		HttpServletResponse response = ServletActionContext.getResponse();
    
    		String id = (String) application.getAttribute("id");
    		String name = (String) request.getAttribute("name");
    		String sessionvalue = (String) session.getAttribute("session");
    		System.out.println(id + "," + name + "," + sessionvalue);
    
    		application.setAttribute("key", "application");
    		session.setAttribute("key", "session");
    		request.setAttribute("key", "request");
    
    		return "insert";
    	}
    }

**4、OGNL传值**

**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></title>
    </head>
    <body>
    	<h1>注册页面</h1>
    	<form action="isreg.action" method="post">
    		<p>
    			用户名：<input type="text" name="user.loginName" value="lisi" />
    		</p>
    		<p>
    			密码：<input type="text" name="user.loginPwd" value="123" />
    		</p>
    		<p>
    			年龄：<input type="text" name="user.age" value="30" />
    		</p>
    		<p>
    			生日：<input type="text" name="user.birthday"
    				value="2001-02-03 10:20:20" />
    		</p>
    
    		<hr>
    		<br />
    		
    		<p>
    			<input type="submit" value="注册" />
    		</p>
    	</form>
    
    </body>
    </html>

实体类Users.java

package cn.sz.pojo;
    
    import java.io.Serializable;
    import java.util.Date;
    
    public class Users implements Serializable {
    	private String loginName;
    	private String loginPwd;
    	private Integer age;
    	private Date birthday;
    
    	public String getLoginName() {
    		return loginName;
    	}
    
    	public void setLoginName(String loginName) {
    		this.loginName = loginName;
    	}
    
    	public String getLoginPwd() {
    		return loginPwd;
    	}
    
    	public void setLoginPwd(String loginPwd) {
    		this.loginPwd = loginPwd;
    	}
    
    	public Integer getAge() {
    		return age;
    	}
    
    	public void setAge(Integer age) {
    		this.age = age;
    	}
    
    	public Date getBirthday() {
    		return birthday;
    	}
    
    	public void setBirthday(Date birthday) {
    		this.birthday = birthday;
    	}
    
    }

Action类：

package cn.sz.action;
    
    import java.util.HashSet;
    import java.util.Set;
    
    import javax.servlet.http.HttpServletRequest;
    
    import org.apache.struts2.ServletActionContext;
    
    import cn.sz.pojo.Users;
    
    import com.opensymphony.xwork2.ActionContext;
    import com.opensymphony.xwork2.ActionSupport;
    import com.opensymphony.xwork2.util.ValueStack;
    
    public class UserAction extends ActionSupport {
    	
    	private Users user;
    	
    	public Users getUser() {
    		return user;
    	}
    
    	public void setUser(Users user) {
    		this.user = user;
    	}
    
    	public String isreg() {
    		
    		System.out.println(user.getLoginName() + "," + user.getLoginPwd() + ","
    				+ user.getAge() + "," + user.getBirthday());
    
    		return "success";
    	}
    
    }

[http_blog.csdn.net_benxiaohai888_article_details_78374307]: http://blog.csdn.net/benxiaohai888/article/details/78374307