在Struts2中提供了更为简单的参数请求与接收方法，可以直接在Action中定义属性；Struts2通过反射机制将参数反射到属性的set方法上实现参数的传递；
GET方式传送参数
<struts>
<constant name="struts.118n.encoding" value="UTF-8"></constant>
<constant name="struts.action.extension" value="do"></constant>
<package name="helloPackage" namespace="/hello" extends="struts-default">
<action name="hello_*" class="com.actions.HelloAction" method="{1}">
<result name="message">/WEB-INF/message.jsp</result>
</action>
</package>
</struts> public class HelloAction {
private Integer id;
private String name;
public HelloAction(){}
public String sayHello(){
return "message";
}
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
message页面：
<body>
id=${id } <br>
name=${name }
</body>请求路径：http://localhost:9000/Struts3/hello/hello_sayHello.do?id=888&name=tom
POST方式传递参数
<form action="http://localhost:9000/Struts3/hello/hello_sayHello.do" method="post"> <table> <tr> <td>id:</td> <td><input type="text" name="id" /> </td> </tr> <tr> <td>name:</td> <td><input type="text" name="name" /></td> </tr> <tr> <td colspan="2"><input type="submit" value="提交"/></td> </tr> </table> </form>
Action 代码同上；
复合方式传递参数
可能要传递的参数是一个对象，Struts2同样也支持自定义实体的进行参数传递；
<form action="http://localhost:9000/Struts3/hello/hello_sayHello.do" method="post"> <table> <tr> <td>id:</td> <td><input type="text" name="hello.id" /> </td> </tr> <tr> <td>name:</td> <td><input type="text" name="hello.name" /></td> </tr> <tr> <td colspan="2"><input type="submit" value="提交"/></td> </tr> </table> </form>
实体：
public class HelloEntity {
// 使用复合方式传递参数，必须添加实体的无参构造函数
public HelloEntity(){
}
private Integer id;
private String name;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}action:
public class HelloAction {
private HelloEntity hello;
public HelloAction(){}
public String sayHello(){
return "message";
}
public HelloEntity getHello() {
return hello;
}
public void setHello(HelloEntity hello) {
this.hello = hello;
}
}message.jsp:
<body>
id=${hello.id } <br>
name=${hello.name }
</body>