Struts2--属性设置方式
Struts2自动获取/设置数据的方式一共分为两种
- 属性驱动(FieldDriven)
- 模型驱动(ModelDriven)
- 属性驱动
属性又分为两种:
|- 基本数据类型
|- JavaBean属性类型
基本数据类型:实例
1 <%@ page language="java" pageEncoding="UTF-8"%> 2 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 3 <html> 4 <head> 5 <title>Insert title here</title> 6 </head> 7 <body> 8 <form action="hello" method="get"> 9 姓名;<input type="text" name="name" size="10px" value="fuwh" readonly="readonly"/> 10 年龄:<input type="text" name="age" size="10px" value="23" readonly="readonly"/> 11 <button type="submit">提交</button> 12 </form> 13 </body> 14 </html>
package com.fuwh.struts; import com.opensymphony.xwork2.Action; import com.opensymphony.xwork2.ModelDriven; public class HelloAction implements Action{ private String name; private int age; public String getName() { return name; } public void setName(String name) { this.name = name; } public int getAge() { return age; } public void setAge(int age) { this.age = age; } @Override public String execute() throws Exception { // TODO Auto-generated method stub System.out.println("执行了HelloAction的默认方法"); return SUCCESS; } }
1 <%@ page language="java" pageEncoding="UTF-8"%> 2 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 3 <html> 4 <head> 5 <title>Insert title here</title> 6 </head> 7 <body> 8 欢迎${age }岁的${name }光临 9 </body> 10 </html>
1 <?xml version="1.0" encoding="UTF-8"?> 2 <!DOCTYPE struts PUBLIC 3 "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN" 4 "http://struts.apache.org/dtds/struts-2.3.dtd"> 5 6 <struts> 7 <package name="mypack" extends="struts-default"> 8 <action name="hello" class="com.fuwh.struts.HelloAction"> 9 <result name="success">hello.jsp</result> 10 </action> 11 </package> 12 </struts>
JavaBean属性类型
1 package com.fuwh.struts; 2 3 public class User implements java.io.Serializable{ 4 5 private static final long serialVersionUID = 1L; 6 7 private String name; 8 private int age; 9 10 public String getName() { 11 return name; 12 } 13 public void setName(String name) { 14 this.name = name; 15 } 16 public int getAge() { 17 return age; 18 } 19 public void setAge(int age) { 20 this.age = age; 21 } 22 23 }
1 <%@ page language="java" pageEncoding="UTF-8"%> 2 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 3 <html> 4 <head> 5 <title>Insert title here</title> 6 </head> 7 <body> 8 <form action="hello" method="get"> 9 姓名;<input type="text" name="user.name" size="10px" value="fuwh" readonly="readonly"/> 10 年龄:<input type="text" name="user.age" size="10px" value="23" readonly="readonly"/> 11 <button type="submit">提交</button> 12 </form> 13 </body> 14 </html>
1 package com.fuwh.struts; 2 3 import com.opensymphony.xwork2.Action; 4 5 public class HelloAction implements Action{ 6 7 private User user 8 9 public User getUser() { 10 return user; 11 } 12 public void setUser(User) { 13 this.user = user; 14 } 15 @Override 16 public String execute() throws Exception { 17 // TODO Auto-generated method stub 18 System.out.println("执行了HelloAction的默认方法"); 19 return SUCCESS; 20 } 21 22 }
1 <%@ page language="java" pageEncoding="UTF-8"%> 2 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 3 <html> 4 <head> 5 <title>Insert title here</title> 6 </head> 7 <body> 8 欢迎${user.age }岁的${user.name }光临 9 </body> 10 </html>
struts.xml配置
1 <?xml version="1.0" encoding="UTF-8"?> 2 <!DOCTYPE struts PUBLIC 3 "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN" 4 "http://struts.apache.org/dtds/struts-2.3.dtd"> 5 6 <struts> 7 <package name="mypack" extends="struts-default"> 8 <action name="hello" class="com.fuwh.struts.HelloAction"> 9 <result name="success">hello.jsp</result> 10 </action> 11 </package> 12 </struts>
模型驱动
1 <%@ page language="java" pageEncoding="UTF-8"%> 2 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 3 <html> 4 <head> 5 <title>Insert title here</title> 6 </head> 7 <body> 8 <form action="hello" method="get"> 9 姓名;<input type="text" name="name" size="10px" value="fuwh" readonly="readonly"/> 10 年龄:<input type="text" name="age" size="10px" value="23" readonly="readonly"/> 11 <button type="submit">提交</button> 12 </form> 13 </body> 14 </html>
1 package com.fuwh.struts; 2 3 import com.opensymphony.xwork2.Action; 4 import com.opensymphony.xwork2.ModelDriven; 5 6 public class HelloAction implements Action,ModelDriven{ 7 8 private User user=new User(); 9 10 @Override 11 public String execute() throws Exception { 12 // TODO Auto-generated method stub 13 System.out.println("执行了HelloAction的默认方法mae"); 14 return SUCCESS; 15 } 16 @Override 17 public User getModel() { 18 // TODO Auto-generated method stub 19 System.out.println("执行了getModel方法"); 20 return this.user; 21 } 22 }
1 <%@ page language="java" pageEncoding="UTF-8"%> 2 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 3 <html> 4 <head> 5 <title>Insert title here</title> 6 </head> 7 <body> 8 欢迎${age }岁的${name }光临 9 </body> 10 </html>
1 <?xml version="1.0" encoding="UTF-8"?> 2 <!DOCTYPE struts PUBLIC 3 "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN" 4 "http://struts.apache.org/dtds/struts-2.3.dtd"> 5 6 <struts> 7 <package name="mypack" extends="struts-default"> 8 <action name="hello" class="com.fuwh.struts.HelloAction"> 9 <result name="success">hello.jsp</result> 10 </action> 11 </package> 12 </struts>
Struts处理多值参数
普通类型
普通类型和负责类型一样,可以选择用集合来接收,也可以用数组来接收
复杂类型
![](https://images.cnblogs.com/OutliningIndicators/ContractedBlock.gif)
package com.fuwh.demo; public class User { private int age; private String name; public int getAge() { return age; } public void setAge(int age) { this.age = age; } public String getName() { return name; } public void setName(String name) { this.name = name; } @Override public String toString() { return "User [age=" + age + ", name=" + name + "]"; } }
<%@ page language="java" pageEncoding="UTF-8"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <title>Insert title here</title> </head> <body> <form action="show" method="post"> 兴趣爱好:<input type="text" name="stu[0].age" value="5"> <input type="text" name="stu[0].name" value="fuwh1"><br/> <input type="text" name="stu[1].age" value="6"> <input type="text" name="stu[1].name" value="fuwh2"><br/> <input type="text" name="stu[2].age" value="7"> <input type="text" name="stu[2].name" value="fuwh3"><br/> <input type="submit"> </form> </body> </html>
![](https://images.cnblogs.com/OutliningIndicators/ContractedBlock.gif)
package com.fuwh.demo; import java.util.List; import com.opensymphony.xwork2.Action; public class Show implements Action{ private List<User> stu; public List<User> getStu() { System.out.println("execut the get method!"); return stu; } public void setStu(List<User> stu) { System.out.println("execute the set method!"); this.stu = stu; } @Override public String execute() throws Exception { // TODO Auto-generated method stub System.out.println("执行了action的默认方法"); System.out.println(stu); return SUCCESS; } }
![](https://images.cnblogs.com/OutliningIndicators/ContractedBlock.gif)
<?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.5//EN" "http://struts.apache.org/dtds/struts-2.5.dtd"> <struts> <!-- 开启debug模式,会自动加载配置文件等等,不用每次更改了配置文件就去重新启动下服务器 --> <constant name="struts.devMode" value="true" /> <package name="test" extends="struts-default"> <action name="show" class="com.fuwh.demo.Show"> <result name="success">hello.jsp</result> </action> </package> </struts>
![](https://images.cnblogs.com/OutliningIndicators/ContractedBlock.gif)
<%@ page language="java" pageEncoding="UTF-8"%> <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%> <html> <head> <title>Insert title here</title> </head> <body> 学生们:${stu} </body> </html>
最后出力结果: