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:
- 1.Action必须实现ModelDriven接口
- 2.重写getModel()方法,返回一个javaBean对象.
- 3.实例化一个javaBean对象.
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="${pageContext.servletContext.contextPath}/testAction.action">2 name:<input type="text" name="name"><br>3 password:<input type="password" name="password"><br>4 <input type="submit" value="提交">5 </form>
Action:
1 public class TestAction implements ModelDriven { 2 private Person person = new Person(); 3 4 public Person getPerson() { 5 return person; 6 } 7 8 public void setPerson(Person person) { 9 this.person = person;10 }11 12 public String execute() {13 System.out.println("name: " + person.getName());14 System.out.println("password: " + person.getPassword());15 return "success";16 }17 18 @Override19 public Object getModel() {20 return person;21 }22 }
前台输入信息:
后台显示结果:
4、封装数据到Collection或数组
JavaBean:
1 public class Person { 2 private String name; 3 private String password; 4 public String getName() { 5 return name; 6 } 7 public void setName(String name) { 8 this.name = name; 9 }10 public String getPassword() {11 return password;12 }13 public void setPassword(String password) {14 this.password = password;15 }16 }
表单信息:
1 <form action="${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:
- 2楼蕊碎乌托邦
- 试试 springMVC吧
- Re: 小龙Sunny
- @蕊碎乌托邦,学完SSH,再学springmvc和MyBatis
- 1楼阿赫瓦里
- 总结的不错,思路很清晰,赞一个,加油!!!