struts2

最新推荐文章于 2023-09-21 16:35:24 发布

小东升职记

最新推荐文章于 2023-09-21 16:35:24 发布

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分类专栏：新手必看编程规则小东升职记文章标签： java struts2

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Struts2类级别拦截器

Springmvc方法级别的拦截器

Struts2拦截器的实现：struts2-interceptors

Springmvc：springmvc-aop实现

Springmvc：变量是独立的，不共享

Struts2：方法中的变量是共享的

Struts2：为了线程安全，每个请求都会创建一个action处理

Springmvc与spring无缝整合，管理安全

1.导入struts2-core依赖包

2.在WEB-INF下面配置web.xml文件

<filter>
  	<filter-name>mvc</filter-name>
  	<filter-class>org.apache.struts2.dispatcher.filter.StrutsPrepareAndExecuteFilter</filter-class>
  </filter>
  <filter-mapping>
  	<filter-name>mvc</filter-name>
  	<url-pattern>/*</url-pattern>
  </filter-mapping>

3.配置struts.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC
	"-//Apache Software Foundation//DTD Struts Configuration 2.1.7//EN"
	"http://struts.apache.org/dtds/struts-2.1.7.dtd">
<struts>
<!--package指的是开辟一个空间，名字是唯一的  -->
<!--namespace 命名空间 一级访问路径  -->
<!--extends继承struts-default.xml调用struts2的核心拦截器  -->
	<package name="demo" 
		namespace="/demo" 
		extends="struts-default">
<!--name:二级访问路径 class：处理请求的类  -->
	<action name="hello" 
		class="com.zhiyou100.action.HelloAction">
<!--name:返回的逻辑视图  -->
		<result name="success">/WEB-INF/msg.jsp</result>
	</action>
	</package>

4.在WEB-IN下面创建msg.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>struts2</title>
</head>
<body>
	<h1>hello,struts2</h1>
</body>
</html>

5.创建HelloAction.java

/**
 * 
 */
package com.zhiyou100.action;

/**
 * @author Administrator
 *
 */
public class HelloAction {
	private String name;
	public String execute() {
		System.out.println("HELLOWORLD,STRUTS2");
		return "success";
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	
}

6.服务器测试/demo/hello，结果跳转到msg.jsp界面

7.struts2下的空转发跳转页面

<package name="message"
		namespace="/message"
		extends="struts-default">
		<action name="login"
			 class="com.zhiyou100.action.LoginAction">
			 <result name="success">/WEB-INF/msg.jsp</result>
		</action>
		<action name="loginForm">
			<result>/WEB-INF/login.jsp</result>
		</action>
	</package>

login.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>登录</title>
</head>
<body style="font-size: 30px;">
	<c:url var="url" value="/message/login.action"/>
	<form action="${url }" method="post">
	<div>
		<label>用户：</label>
		<input type="text" name="username"/>
	</div>
	<div>
		<label>密码：</label>
		<input type="password" name="password"/>
	</div>
	<div>
		<label>
			<input type="submit" value="登录">
		</label>
	</div>
	</form>
</body>
</html>

LoginAction.java

/**
 * 
 */
package com.zhiyou100.action;

/**
 * @author Administrator
 *
 */
public class LoginAction {
	private String username;
	private String password;

	public String getUsername() {
		return username;
	}

	public void setUsername(String username) {
		this.username = username;
	}

	public String getPassword() {
		return password;
	}

	public void setPassword(String password) {
		this.password = password;
	}

	public String execute() {
		System.out.println("username:"+username);
		System.out.println("password:"+password);
		return "success";
	}
}

测试

8.struts2下的bean传值

user.java

/**
 * 
 */
package com.zhiyou100.entity;

/**
 * @author Administrator
 *
 */
public class User {
	private String name;
	private String pwd;

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public String getPwd() {
		return pwd;
	}

	public void setPwd(String pwd) {
		this.pwd = pwd;
	}

}

<package name="user" 
		namespace="/user" 
			extends="struts-default">
		<action name="loginForm">
			<result>/WEB-INF/login2.jsp</result>
		</action>
		
		<action name="login"
			class="com.zhiyou100.action.UserAction" method="login">
			<result name="success">/WEB-INF/msg.jsp</result>
		</action>
	</package>

login2.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>登录</title>
</head>
<body style="font-size: 30px;">
	<c:url var="url" value="/user/login.action"/>
	<form action="${url }" method="post">
	<div>
		<label>用户：</label>
		<input type="text" name="user.name"/>
	</div>
	<div>
		<label>密码：</label>
		<input type="password" name="user.pwd"/>
	</div>
	<div>
		<label>
			<input type="submit" value="登录">
		</label>
	</div>
	</form>
</body>
</html>

UserAction.java

/**
 * 
 */
package com.zhiyou100.action;

import com.zhiyou100.entity.User;

/**
 * @author Administrator
 *
 */
public class UserAction {
	private User user;

	public User getUser() {
		return user;
	}

	public void setUser(User user) {
		this.user = user;
	}
	public String login() {
		System.out.println(user.getName());
		return "success";
	}
}

测试

9.struts2下的map传值

<package name="login"
		namespace="/login"
			extends="struts-default">
		
		<action name="loginForm">
			<result>/WEB-INF/loginForm.jsp</result>
		</action>
		
		<action name="login2"
			class="com.zhiyou100.action.Login2Action">
			<result name="success">/WEB-INF/ok.jsp</result>
			<result name="error">/WEB-INF/loginForm.jsp</result>
		</action>
	</package>

loginForm.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>登录</title>
</head>
<body style="font-size: 30px;">
	<c:url var="url" value="/login/login2.action"/>
	<h1>${message}</h1>
	<form action="${url }" method="post">
	<div>
		<label>用户：</label>
		<input type="text" name="user.name"/>
	</div>
	<div>
		<label>密码：</label>
		<input type="password" name="user.pwd"/>
	</div>
	<div>
		<label>
			<input type="submit" value="登录">
		</label>
	</div>
	</form>
</body>
</html>

Login2Action.java

/**
 * 
 */
package com.zhiyou100.action;

import java.util.Map;

import org.apache.struts2.interceptor.SessionAware;

import com.zhiyou100.entity.User;

/**
 * @author Administrator
 *
 */
public class Login2Action implements SessionAware {
	private User user;
	private String message;
	private Map<String, Object> session;

	public User getUser() {
		return user;
	}

	public void setUser(User user) {
		this.user = user;
	}

	public String getMessage() {
		return message;
	}

	public void setMessage(String message) {
		this.message = message;
	}

	public Map<String, Object> getSession() {
		return session;
	}

	public void setSession(Map<String, Object> session) {
		this.session = session;
	}
	public String execute() {
		if (user.getName().equals("Tom")&&user.getPwd().equals("123456")) {
			session.put("loginName", user.getName());
			return "success";
		}
		message = "用户名或密码错误";
		return "error";
	}
}

测试请求不在写

10.SSProject

首先导入依赖架包

配置WEB-INF下面的web.xml

<!--监听Tomcat，启动Tomcat时初始化Spring容器  -->
  <listener>
  	<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>
  <!--指定spring配置文件的位置  -->
  <context-param>
  	<param-name>contextConfigLocation</param-name>
 	<param-value>classpath:spring-*.xml</param-value>
  </context-param>
  <!--struts主控制器的配置  -->
  <filter>
  	<filter-name>struts</filter-name>
  	<filter-class>org.apache.struts2.dispatcher.filter.StrutsPrepareAndExecuteFilter</filter-class>
  </filter>
  <filter-mapping>
  	<filter-name>struts</filter-name>
  	<url-pattern>/*</url-pattern>
  </filter-mapping>

配置spring-struts.xml

<context:component-scan base-package="com.zhiyou100"/>

配置struts.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC
    "-//Apache Software Foundation//DTD Struts Configuration 2.5//EN"
    "http://struts.apache.org/dtds/struts-2.5.dtd">
<struts>
    <package name="demo"
    	namespace="/demo"
    		extends="struts-default">
    	<action name="hello"
    	class="helloAction">
    		<result name="success">/WEB-INF/msg.jsp</result>
    	</action>
    </package>
    
    <!--struts2的重定向  -->
    <package name="result"
    	namespace="/result"
    		extends="struts-default">
    	<action name="hello"
    		class="helloAction">
    		<result name="success">/WEB-INF/msg.jsp</result>
    	</action>
    	<action name="test1">
    		<result type="redirectAction">hello</result>
    	</action>
    	
    	<action name="test2">
    		<result type="redirectAction">
    			<param name="namespace">/demo</param>
    			<param name="actionName">hello</param>
    		</result>
    	</action>
    	
    	<action name="test3">
    		<result type="redirect">https://www.baidu.com</result>
    	</action>
    	
    	<action name="test4">
    		<result type="redirect">
    			<param name="location">https://www.baidu.com</param>
    		</result>
    	</action>
    </package>
</struts>

创建HelloAction.java

/**
 * 
 */
package com.zhiyou100.action;

import javax.annotation.Resource;

import org.springframework.context.annotation.Scope;
import org.springframework.stereotype.Controller;

import com.zhiyou100.service.DemoService;

/**
 * @author Administrator
 *
 */
@Controller
@Scope("prototype")//多例
public class HelloAction {
	@Resource
	private DemoService demoService;
	public String execute() {
		demoService.hello();
		return "success";
	}
}

最后测试

11.

<!--编写下载流  -->
    	<action name="image"
    		class="imageAction">
    		<result name="success" type="stream">
    		<param name="contentType">image/png</param>
    		<param name="inputName">image</param>
    		<param name="contentDisposition">attachment,filename="hello.png"</param>
    		</result>
    	</action>

/**
 * 
 */
package com.zhiyou100.action;

import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;

import javax.imageio.ImageIO;

import org.apache.commons.io.output.ByteArrayOutputStream;
import org.springframework.context.annotation.Scope;
import org.springframework.stereotype.Controller;


/**
 * @author Administrator
 *
 */
@Controller
@Scope("prototype")
public class ImageAction {

	private InputStream image;

	public InputStream getImage() {
		return image;
	}

	public void setImage(InputStream image) {
		this.image = image;
	}
	@SuppressWarnings("resource")
	public String execute() throws IOException {
//		设置图片
		BufferedImage img = 
				new BufferedImage(100, 60, BufferedImage.TYPE_3BYTE_BGR);
//		获取画笔
		Graphics2D g = 
				img.createGraphics();
		g.setColor(Color.green);
		g.drawString("Hello World", 10, 30);
//		将该图片转换成字节数组
		ByteArrayOutputStream out = 
				new ByteArrayOutputStream();
		ImageIO.write(img, "png", out);
//		将字节数组转换成字节流
		byte[] data = 
				out.toByteArray();
		image = new ByteArrayInputStream(data);
		return "success";
	}
}