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猜数目字-struts

分类: IT文章 • 2024-08-03 21:06:07
猜数字---------struts
新建一个web项目，为其添加struts1.1特性，然后新建一个产生数字的acionform

/*
 * Generated by MyEclipse Struts
 * Template path: templates/java/JavaClass.vtl
 */
package ch02;

import javax.servlet.http.HttpServletRequest;
import org.apache.struts.action.ActionErrors;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionMapping;

/** 
 * MyEclipse Struts
 * Creation date: 06-25-2010
 * 
 * XDoclet definition:
 * @struts.form name="ch02.form.GuessNumberFormForm"
 */
public class CreateNumberActionForm extends ActionForm {
	 private String digits;
	    public String getDigits() {
	        return digits;
	    }

	    public void setDigits(String digits) {
	        this.digits = digits;
	    }
	
	/*
	 * Generated Methods
	 */

	/** 
	 * Method validate
	 * @param mapping
	 * @param request
	 * @return ActionErrors
	 */
	public ActionErrors validate(ActionMapping mapping,
			HttpServletRequest request) {
		// TODO Auto-generated method stub
		return null;
	}

	/** 
	 * Method reset
	 * @param mapping
	 * @param request
	 */
	public void reset(ActionMapping mapping, HttpServletRequest request) {
		// TODO Auto-generated method stub
	}
}


新建一个生成数字的action类，代码如下：

/*
 * Generated by MyEclipse Struts
 * Template path: templates/java/JavaClass.vtl
 */
package ch02;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;

import ch02.CreateNumberActionForm;

/**
 * MyEclipse Struts Creation date: 06-25-2010
 * 
 * XDoclet definition:
 * 
 * @struts.action
 */
public class createNumberAction extends Action {
	/*
	 * Generated Methods
	 */

	/**
	 * Method execute
	 * 
	 * @param mapping
	 * @param form
	 * @param request
	 * @param response
	 * @return ActionForward
	 */
	public ActionForward execute(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response) {
		CreateNumberActionForm cform = (CreateNumberActionForm) form;
		HttpSession session = request.getSession();
		session.removeAttribute("message");
		int digits = Integer.parseInt(cform.getDigits());

		int secret_number = (int) (Math.random() * digits);

		System.out.println(secret_number);

		session.setAttribute("secret_number", String.valueOf(secret_number));

		return mapping.findForward("guess");    //全局转发或是action forward
	}
}


再建一个接收所猜数字的acitionform

* Generated by MyEclipse Struts
 * Template path: templates/java/JavaClass.vtl
 */
package ch02;

import javax.servlet.http.HttpServletRequest;
import org.apache.struts.action.ActionErrors;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionMapping;

/** 
 * MyEclipse Struts
 * Creation date: 06-25-2010
 * 
 * XDoclet definition:
 * @struts.form name="ch02.form.JudgeActionForm"
 */
public class JudgeActionForm extends ActionForm {
	/*
	 * Generated fields
	 */

	/** guess_number property */
	private String guess_number;

	/*
	 * Generated Methods
	 */

	/** 
	 * Method validate
	 * @param mapping
	 * @param request
	 * @return ActionErrors
	 */
	public ActionErrors validate(ActionMapping mapping,
			HttpServletRequest request) {
		// TODO Auto-generated method stub
		return null;
	}

	/** 
	 * Method reset
	 * @param mapping
	 * @param request
	 */
	public void reset(ActionMapping mapping, HttpServletRequest request) {
		// TODO Auto-generated method stub
	}

	/** 
	 * Returns the guess_number.
	 * @return String
	 */
	public String getGuess_number() {
		return guess_number;
	}

	/** 
	 * Set the guess_number.
	 * @param guess_number The guess_number to set
	 */
	public void setGuess_number(String guess_number) {
		this.guess_number = guess_number;
	}
}


判断所猜数字的action
/*
 * Generated by MyEclipse Struts
 * Template path: templates/java/JavaClass.vtl
 */
package ch02;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;

import ch02.JudgeActionForm;

/** 
 * MyEclipse Struts
 * Creation date: 06-25-2010
 * 
 * XDoclet definition:
 * @struts.action
 */
public class judgeAction extends Action {
	/*
	 * Generated Methods
	 */

	/** 
	 * Method execute
	 * @param mapping
	 * @param form
	 * @param request
	 * @param response
	 * @return ActionForward
	 */
	public ActionForward execute(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response) {
		// TODO Auto-generated method stub
		
		JudgeActionForm jForm = (JudgeActionForm) form;

        HttpSession session = request.getSession();

        int guess_number = Integer.parseInt(jForm.getGuess_number());

        int secret_number = Integer.parseInt((String)session.getAttribute("secret_number"));

        if (guess_number == secret_number){
            session.setAttribute("message","equal");
        }else if (guess_number > secret_number){
            session.setAttribute("message","bigger");
        }else{
            session.setAttribute("message","smaller");
        }
		
		
		
		return mapping.findForward("guess");     //继续返回猜数字
	}
}


这些在myeclipse里都有图形化生成工具，填入对应的名称即可生成代码类，在写入所需的逻辑代码。这样系统会自动在struts-config.xml中配置对应的action和actionform，无需自己编写配置文件
struts-config.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.1//EN" "http://jakarta.apache.org/struts/dtds/struts-config_1_1.dtd">

<struts-config>
  <data-sources />
  <form-beans >
    <form-bean name="createNumberActionForm" type="ch02.CreateNumberActionForm" />
    <form-bean name="judgeActionForm" type="ch02.JudgeActionForm" />

  </form-beans>

  <global-exceptions />
  <global-forwards>
           <forward name="guess" path="/guess.jsp"></forward>
           </global-forwards>
  <action-mappings >
    <action
    name="createNumberActionForm"
      path="/createNumberAction"
      scope="session"
      type="ch02.createNumberAction"
      validate="false" />
    <action
      name="judgeActionForm"
      path="/judgeAction"
      scope="session"
      type="ch02.judgeAction"
      validate="false" />

  </action-mappings>

  <message-resources parameter="ApplicationResources" />
</struts-config>


web。xml主要配置servlet，
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://java.sun.com/xml/ns/j2ee"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="2.4"
	xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee   http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
	
	<!-- 中心控制器ActionServlet -->
	<servlet>
		<servlet-name>action</servlet-name>
		<servlet-class>
			org.apache.struts.action.ActionServlet
		</servlet-class>
		<init-param>
			<param-name>config</param-name>
			<param-value>/WEB-INF/struts-config.xml</param-value>
		</init-param>
		<init-param>
			<param-name>debug</param-name>
			<param-value>3</param-value>
		</init-param>
		<init-param>
			<param-name>detail</param-name>
			<param-value>3</param-value>
		</init-param>
		<load-on-startup>0</load-on-startup>
	</servlet>
<!-- 中心控制器ActionServlet -->
	<servlet-mapping>
		<servlet-name>action</servlet-name>
		<url-pattern>*.do</url-pattern>
	</servlet-mapping>
<welcome-file-list>
		<welcome-file>guess.jsp</welcome-file>
	</welcome-file-list>
</web-app>


唯一的一个jsp页面guess.jsp代码如下：主要用到struts的标签库
<%@ taglib uri="/WEB-INF/struts-html.tld" prefix="html" %>
<%@ taglib uri="/WEB-INF/struts-bean.tld" prefix="bean" %>
<%@ page contentType="text/html; charset=GB2312" %>
<html:html>
<head>
<title>
guess.jsp
</title>
</head>
<body>
<h1><bean:message key="page"/></h1>

<html:form action="/createNumberAction.do" method="POST">
<h3><bean:message key="page.choose"/></h3>
<html:select property="digits">
  <html:option value="10">10</html:option>
  <html:option value="100">100</html:option>
  <html:option value="1000">1000</html:option>
</html:select>
<html:submit><bean:message key="page.new"/></html:submit><br>
</html:form>

<hr>

<html:form action="/judgeAction.do" method="POST">
<html:text property="guess_number" value=""/>
<html:submit><bean:message key="page.guess"/></html:submit><br>
</html:form>

<hr>

<%
     String message = null;
     message = (String)session.getAttribute("message");
     if (message != null) {
       if (message.equals("equal")){
%>
           <!-- result.equal在资源文件中定义 -->
          <h1><bean:message key="result.equal"/></h1>
<%
       }
       else if (message.equals("bigger")){
%>
          <h1><bean:message key="result.big"/></h1>
<%
       }
       else {
%>
          <h1><bean:message key="result.small"/></h1>
<%
       }
     }
%>

</body>
</html:html>


资源文件 ApplicationResources.properties
result.equal  = \u606d\u559c\u4f60\uff0c\u7b54\u5bf9\u4e86\uff01
result.small  = \u592a\u5c0f\u4e86\uff0c\u91cd\u65b0\u731c\u5427\uff01
result.big    = \u592a\u5927\u4e86\uff0c\u91cd\u65b0\u731c\u5427\uff01

page          = \u731c\u6570\u5b57\u7684\u9875\u9762
page.choose   = \u9009\u62e9\u6570\u5b57\u7684\u8303\u56f4
page.new      = \u5f00\u59cb\u4e00\u6b21\u65b0\u7684\u731c\u6570
page.guess    = \u731c\u731c\u770b

部署到tomcat上，或直接拷贝项目至webapps启动tomcat，输入网址http://localhost:8080/项目名称，即可访问

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