jfinal+jsp 开发

JFinal  是基于 Java  语言的极速  WEB  + ORM  开发框架，其核心设计目标是开发迅速、代码量少、学习简单、功能强大、轻量级、易扩展、Restful。在拥有Java 语言所有优势的同时再拥有 ruby、python、php 等动态语言的开发效率！

  1:在项目pom.xml 文件添加相关依赖

   	<!-- jfinal 依赖的jar -->
	<dependencies>
		<dependency>
			<groupId>com.jfinal</groupId>
			<artifactId>jfinal</artifactId>
			<version>1.9</version>
		</dependency>
		<dependency>
			<groupId>com.alibaba</groupId>
			<artifactId>druid</artifactId>
			<version>1.0.11</version>
		</dependency>
		<dependency>
			<groupId>com.alibaba</groupId>
			<artifactId>fastjson</artifactId>
			<version>1.1.15</version>
		</dependency>
		<dependency>
			<groupId>org.freemarker</groupId>
			<artifactId>freemarker</artifactId>
			<version>2.3.20</version>
		</dependency>
		<!-- 数据库连接依赖包 -->
		<dependency>
			<groupId>mysql</groupId>
			<artifactId>mysql-connector-java</artifactId>
			<version>5.1.34</version>
		</dependency>
	</dependencies>

2：编写实体类，继承 model 抽象类

import com.jfinal.plugin.activerecord.Model;
public class User extends Model<User>{

}

3：编写config 配置文件

package conf;

import model.User;

import com.jfinal.config.Constants;
import com.jfinal.config.Handlers;
import com.jfinal.config.Interceptors;
import com.jfinal.config.JFinalConfig;
import com.jfinal.config.Plugins;
import com.jfinal.config.Routes;
import com.jfinal.core.JFinal;
import com.jfinal.plugin.activerecord.ActiveRecordPlugin;
import com.jfinal.plugin.druid.DruidPlugin;
import com.jfinal.render.ViewType;

import controller.LoadController;
import controller.UserController;

public class DemoConf extends JFinalConfig{
	@Override
	public void configConstant(Constants  me) {
		// TODO Auto-generated method stub
		  //设置页面的显示类型为jsp
		me.setViewType(ViewType.JSP);
	}
	@Override
	public void configHandler(Handlers arg0) {
		// TODO Auto-generated method stub
	}

	@Override
	public void configInterceptor(Interceptors arg0) {
		// TODO Auto-generated method stub
	}
	@Override
	public void configPlugin(Plugins me) {
		// TODO Auto-generated method stub
		try {
			DruidPlugin dp = new DruidPlugin(
					"jdbc:mysql://hadoop1:3306/test", "root",
					"root");
			me.add(dp);
			ActiveRecordPlugin arp = new ActiveRecordPlugin(dp);
			me.add(arp);
			//实体类与数据库表映射
			arp.addMapping("user", "id", User.class);
			System.out.println("success");
		} catch (Exception e) {
			// TODO: handle exception
			e.printStackTrace();
			System.out.println("失败");
		}
	}
   //设置路由
	@Override
	public void configRoute(Routes me) {
		// TODO Auto-generated method stub
		
		//me.add("/", UserController.class);
		me.add("/user", UserController.class);
	}

}
4：编写控制器类
import com.jfinal.aop.Before;
import com.jfinal.core.Controller;
import com.jfinal.ext.interceptor.Restful;
public class UserController extends Controller {
	public void index(){
			render("login.jsp");
	}
	User userdao = new User();
 
	public void login() {
		System.out.println("数据库操作");
		User us = getModel(User.class);
		List<User> userlist = userdao.find(
				"select *from user where username=? and password=?",
				us.getStr("username"), us.getStr("password"));
		if(userlist.size()==0){
			redirect("/index.jsp");
		}else{
			redirect("/index1.jsp");
		}
		//return user;
	}

5:web.xml 配置
  

   <filter>
		<filter-name>jfinal</filter-name>
		<filter-class>com.jfinal.core.JFinalFilter</filter-class>
		<init-param>
			<param-name>configClass</param-name>
			<param-value>conf.DemoConf</param-value>
		</init-param>
	</filter>
	<filter-mapping>
		<filter-name>jfinal</filter-name>
		<url-pattern>/*</url-pattern>
	</filter-mapping>

5:页面action 配置

<!-- action 走的是user 这个路由对应的控制器的login() 方法 -->
<div class="loginBox" >
	<div class="login">
    	<h1 class="mg-t30">用户登录</h1>
        <form action="/user/login" method="post">
            <input name="user.username"  type="text">
            <input name="user.password" type="text">
            <input  type="submit" value="登录">
        </form>
    </div>
</div>