JFinal简单示例

官方说明:

JFinal 是基于 Java 语言的极速 WEB + ORM 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。

 

JFinal有如下主要特点:

 

MVC架构,设计精巧,使用简单

遵循COC原则,零配置,无xml

独创Db + Record模式,灵活便利

ActiveRecord支持,使数据库开发极致快速

自动加载修改后的java文件,开发过程中无需重启web server

AOP支持,拦截器配置灵活,功能强大

Plugin体系结构,扩展性强

多视图支持,支持FreeMarker、JSP、Velocity

强大的Validator后端校验功能

功能齐全,拥有struts2的绝大部分功能

体积小仅248K,且无第三方依赖

 

 

开始进行JFinal集合DB示例

本机环境:Eclipse 4.4、Maven 3.0.5、Mysql 5.1、JDK 1.6、Tomcat 6.0

 

1、新建web项目:test


JFinal简单示例_第1张图片
 

如图,Project name填写:test,Target runtime选择Apache Tomcat v6.0(此中间件为我本地Eclipse事先配置好的),web module version选择2.5,点击下一步:



 

3、默认,点击下一步:



 默认,点击Finish:


JFinal简单示例_第2张图片
 

如图,已创建成功web项目:


JFinal简单示例_第3张图片
 

因需要结合Maven,将该web项目转换为Maven项目,右键项目,选择如下:



 

配置Maven pom.xml,如下:



 

配置JDK编译版本为1.6:


JFinal简单示例_第4张图片
 

Java Compiler设置为1.6:


JFinal简单示例_第5张图片
 

配置pom.xml,添加jfinal、mysql、c3p0、servlet相关依赖jar坐标,如下:

<dependencies>
          <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.25</version>
        </dependency>
        <dependency>
            <groupId>c3p0</groupId>
            <artifactId>c3p0</artifactId>
            <version>0.9.1.2</version>
        </dependency>
        <dependency>
            <groupId>com.jfinal</groupId>
            <artifactId>jfinal</artifactId>
            <version>2.1</version>
        </dependency>
        <dependency>
          <groupId>javax.servlet</groupId>
          <artifactId>javax.servlet-api</artifactId>
          <version>3.0.1</version>
        </dependency>
  </dependencies>

 

修改编译输出目录为“WebContent/WEB-INF/classes”,修改jdk版本为1.6和编译采用的编码格式为utf-8:

<build>
    <sourceDirectory>src</sourceDirectory>
    <outputDirectory>WebContent/WEB-INF/classes</outputDirectory>
    <plugins>
        <!-- 打war包插件设置web目录为eclipse默认目录 -->
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-war-plugin</artifactId>
            <version>2.1.1</version>
            <configuration>
                <!-- 设置WebContent目录为Web目录 -->
                <warSourceDirectory>WebContent</warSourceDirectory>
            </configuration>
        </plugin>
        <!-- 编译插件使用的jdk版本和编译采用的编码格式(默认为GBK) -->
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>2.0.2</version>
            <configuration>
                <source>1.6</source>
                <target>1.6</target>
                <encoding>utf-8</encoding>
            </configuration>
        </plugin>
    </plugins>
  </build>

 

web.xml只设置welcom-file-list为index.jsp:

<welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
</welcome-file-list>

 

2、创建包路径,包含action、conf、entity,如下:



 

创建Controller:TestController.java,继承Controller,添加方法index,如下:

package com.test.action;
 
import java.util.List;
 
import com.jfinal.core.Controller;
import com.test.entity.Test;
 
public class TestController extends Controller {
 
    public void index() {
        List<Test> list = Test.dao.find("select * from test");
        this.renderJson(list);
    }
 
}

 

创建数据库对应实体:Test.java,继承Model,如下:

package com.test.entity;
 
import com.jfinal.plugin.activerecord.Model;
 
/**
 * Generated by JFinal.
 */
@SuppressWarnings("serial")
public class Test extends Model<Test> {
    public static final Test dao = new Test();
}

 

创建JFinal配置类:CommonConfig.java,如下:

package com.test.conf;
 
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.plugin.activerecord.ActiveRecordPlugin;
import com.jfinal.plugin.activerecord.dialect.MysqlDialect;
import com.jfinal.plugin.c3p0.C3p0Plugin;
import com.jfinal.render.ViewType;
import com.test.action.TestController;
import com.test.entity.Test;
 
public class CommonConfig extends JFinalConfig {
 
    @Override
    public void configConstant(Constants constants) {
        // 设定为开发者模式
        constants.setDevMode(false);
        constants.setViewType(ViewType.JSP);
    }
 
    @Override
    public void configHandler(Handlers handlers) {
    }
 
    @Override
    public void configInterceptor(Interceptors interceptors) {
    }
 
    @Override
    public void configPlugin(Plugins plugins) {
        C3p0Plugin cp = new C3p0Plugin("jdbc:mysql://localhost:3306/mydb", "root", "root");
        plugins.add(cp);
        ActiveRecordPlugin arp = new ActiveRecordPlugin(cp);
        plugins.add(arp);
        arp.setDialect(new MysqlDialect());
        arp.addMapping("test", "id", Test.class);
    }
 
    @Override
    public void configRoute(Routes routes) {
        routes.add("/", TestController.class);
    }
 
}

 

web.xml添加JFinal过滤器并加载自定义JFinal配置类,如下:

<?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_2_5.xsd" id="WebApp_ID" version="2.5">
  <display-name>test</display-name>
  <filter>
    <filter-name>jfinal</filter-name>
    <filter-class>com.jfinal.core.JFinalFilter</filter-class>
    <init-param>
        <param-name>configClass</param-name>
        <param-value>com.test.conf.CommonConfig</param-value>
    </init-param>
  </filter>
  <filter-mapping>
    <filter-name>jfinal</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>
  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>
</web-app>

 

创建index.jsp,添加form表单请求TestController,如下:

<%@ 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>test</title>
</head>
<body>
<form id="form1" method="post" name="form1">
 
</form>
</body>
<script type="text/javascript">
    function submit() {
        document.getElementById("form1").action = "test/index?t=" + new Date().getTime();
        document.getElementById("form1").submit();
    }
    submit();
</script>
</html>

 

浏览器访问:http://127.0.0.1/test,如下:



 

综上,JFinal结合mysql的示例到此已完成,此示例仅为JFinal简单示例,不能作为典型示例,仅仅作为入门的参考,还有待大家进行补充完善。

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