Struts2入门web程序

1、下载地址

最好下载-all.zip

2、导入jar包

下载文件——>apps——>打开随便一个war包


3、写action类(有3种方式)

(1)普通类

package hello;
public class Hello {
	public String execute()
	{
		return "ok";
	}
}

(2)实现接口

package hello;
import com.opensymphony.xwork2.Action;
public class Hello implements Action {
	public String execute()
	{
		return "ok";
	}
}

(3)继承类(也实现了Action接口,常用)

package hello;
import com.opensymphony.xwork2.ActionSupport;
public class Hello extends ActionSupport {
	public String execute()
	{
		return "ok";
	}
}

4、struts配置文件(必须再src下,名称为struts.xml)

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC 
	"-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
	"http://struts.apache.org/dtds/struts-2.3.dtd">
	
<struts>
	<!-- 常量设置,这个设置可以解决Post乱码问题 -->
	<constant name="struts.i18n.encoding" value="UTF-8"></constant>
	<!-- name随便取,不能重名;
	extends="struts-default" 固定内容,识别action;
	namespace名称空间,默认是/ -->
	<package name="package1" extends="struts-default" namespace="/">
		<!-- 识别网址中的hello,与name的值相同则配对成功
		class是action类的全路径
		method识别类中的execute方法 -->
		<action name="hello" class="hello.Hello" method="execute">
			<!-- 与类返回的字符串配对,相同则跳转到这个页面 -->
			<result name="ok">/hello.jsp</result>
		</action>
	</package>
</struts>
5、web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
  <display-name>struts2</display-name>
  
	<!-- 过滤器 -->
	<filter>
		<filter-name>struts2</filter-name>
		<filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
	</filter>
	<filter-mapping>
		<filter-name>struts2</filter-name>
		<url-pattern>/*</url-pattern>
	</filter-mapping>
  
  <welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>default.html</welcome-file>
    <welcome-file>default.htm</welcome-file>
    <welcome-file>default.jsp</welcome-file>
  </welcome-file-list>
</web-app>

6、访问

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localhost:8080/项目名/hello

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转载自blog.csdn.net/sanmao123456_/article/details/80864611