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在struts2框架中关于Action处理请求参数有两种方案(三个方式)，表单属性的名称应该和在Action类中定义的成员属性或者在JavaBean中定义的成员属性名称一样：
1、属性驱动
1)直接在Action类中定义成员属性来接收请求参数 (将Action当成javaBean)，在Action中还需要定义成员属性的setter方法。
表单信息：
1 <form action="${pageContext.servletContext.contextPath}/testAction.action"> 2 name:<input type="text" name="name"><br> 3 password:<input type="password" name="password"><br> 4 <input type="submit" value="提交"> 5 </form>
Action类：
1 public class TestAction { 2 private String name; 3 private String password; 4 5 public String getName() { 6 return name; 7 } 8 9 public void setName(String name) { 10 this.name = name; 11 } 12 13 public String getPassword() { 14 return password; 15 } 16 17 public void setPassword(String password) { 18 this.password = password; 19 } 20 21 public String execute() { 22 System.out.println("name: " + name); 23 System.out.println("password: " + password); 24 return "success"; 25 } 26 }
前台输入信息：
后台显示结果：
2)直接将javaBean做为Action的属性，在页面上必须使用ognl表达式来描述组件的name属性
1 username:<input type="text" name="user.username"><br>
JavaBean：
1 public class Person { 2 private String name; 3 private String password; 4 5 public String getName() { 6 return name; 7 } 8 public void setName(String name) { 9 this.name = name; 10 } 11 public String getPassword() { 12 return password; 13 } 14 public void setPassword(String password) { 15 this.password = password; 16 } 17 }
表单信息：
1 <form action="${pageContext.servletContext.contextPath}/testAction.action"> 2 name:<input type="text" name="person.name"><br> 3 password:<input type="password" name="person.password"><br> 4 <input type="submit" value="提交"> 5 </form>
Action：
1 public class TestAction { 2 private Person person; 3 4 public Person getPerson() { 5 return person; 6 } 7 8 public void setPerson(Person person) { 9 this.person = person; 10 } 11 12 public String execute() { 13 System.out.println("name: " + person.getName()); 14 System.out.println("password: " + person.getPassword()); 15 return "success"; 16 } 17 }
前台输入信息：
后台显示结果：
这种方式是通过name="params"的拦截器实现参数封装的。
1 <interceptor name="params" class="com.opensymphony.xwork2.interceptor.ParametersInterceptor"/>
2、模型驱动
模型驱动处理请求参数的步骤为：
步骤:
JavaBean：
1 public class Person { 2 private String name; 3 private String password; 4 public String getName() { 5 return name; 6 } 7 public void setName(String name) { 8 this.name = name; 9 } 10 public String getPassword() { 11 return password; 12 } 13 public void setPassword(String password) { 14 this.password = password; 15 } 16 }
表单信息：
1 <form action="${pageContext.servletContext.contextPath}/testAction.action"> 2 name:<input type="text" name="name"><br> 3 password:<input type="password" name="password"><br> 4 <input type="submit" value="提交"> 5 </form>
Action：
1 public class TestAction implements ModelDriven { 2 private Person person = new Person(); 3 4 public Person getPerson() { 5 return person; 6 } 7 8 public void setPerson(Person person) { 9 this.person = person; 10 } 11 12 public String execute() { 13 System.out.println("name: " + person.getName()); 14 System.out.println("password: " + person.getPassword()); 15 return "success"; 16 } 17 18 @Override 19 public Object getModel() { 20 return person; 21 } 22 }
前台输入信息：
后台显示结果：
4、封装数据到Collection或数组
JavaBean：
1 public class Person { 2 private String name; 3 private String password; 4 public String getName() { 5 return name; 6 } 7 public void setName(String name) { 8 this.name = name; 9 } 10 public String getPassword() { 11 return password; 12 } 13 public void setPassword(String password) { 14 this.password = password; 15 } 16 }
表单信息：
1 <form action="${pageContext.servletContext.contextPath}/testAction.action"> 2 name1:<input type="text" name="list[0].name"><br> 3 password1:<input type="password" name="list[0].password"><hr> 4 name2:<input type="text" name="list[1].name"><br> 5 password2:<input type="password" name="list[1].password"><br> 6 <input type="submit" value="提交"> 7 </form>
Action：
1 public class TestAction { 2 private List<Person> list; 3 4 public List<Person> getList() { 5 return list; 6 } 7 8 public void setList(List<Person> list) { 9 this.list = list; 10 } 11 12 public String execute() { 13 System.out.println("name1: " + list.get(0).getName()); 14 System.out.println("password1: " + list.get(0).getPassword()); 15 System.out.println("name2: " + list.get(1).getName()); 16 System.out.println("password2: " + list.get(1).getPassword()); 17 return "success"; 18 } 19 }
前台输入信息：
后台显示结果：
5、封装数据到Map
JavaBean：
1 public class Person { 2 private String name; 3 private String password; 4 public String getName() { 5 return name; 6 } 7 public void setName(String name) { 8 this.name = name; 9 } 10 public String getPassword() { 11 return password; 12 } 13 public void setPassword(String password) { 14 this.password = password; 15 } 16 }
表单信息：
1 <form action="${pageContext.servletContext.contextPath}/testAction.action"> 2 name1:<input type="text" name="map[‘one‘].name"><br> 3 password1:<input type="password" name="map[‘one‘].password"><hr> 4 name2:<input type="text" name="map[‘two‘].name"><br> 5 password2:<input type="password" name="map[‘two‘].password"><br> 6 <input type="submit" value="提交"> 7 </form>
Action：
public class TestAction { private Map<String, Person> map; public Map<String, Person> getMap() { return map; } public void setMap(Map<String, Person> map) { this.map = map; } public String execute() { System.out.println("name1: " + map.get("one").getName()); System.out.println("password1: " + map.get("one").getPassword()); System.out.println("name2: " + map.get("two").getName()); System.out.println("password2: " + map.get("two").getPassword()); return "success"; } }
前台输入信息：
后台显示结果：
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原文地址：http://www.cnblogs.com/xiaolongSunny/p/4651456.html
