4.8. JFinal3.0&JFinal2.o集成方案

Beetl提供 JFinal3.0 集成，使用JFinal3BeetlRenderFactory ，通过如下注册即可使用beetl模板引擎

public class DemoConfig extends JFinalConfig {
    public void configConstant(Constants me) {
        PropKit.use("a_little_config.txt");                // 加载少量必要配置，随后可用PropKit.get(...)获取值
        me.setDevMode(PropKit.getBoolean("devMode", false));
        JFinal3BeetlRenderFactory rf = new JFinal3BeetlRenderFactory();
        rf.config();
        me.setRenderFactory(rf);
        GroupTemplate gt = rf.groupTemplate;
        //根据gt可以添加扩展函数，格式化函数，共享变量等，
    }

业务逻辑代码:

public void modify(){
        int artId = getParaToInt(0, -1);
        setAttr("title", "修改文章");
        List<Cate> cateLists = Cate.getAllCate();
        //模板里访问cateLists,atr,
        setAttr("cateLists", cateLists);
        setAttr("art", Article.dao.findById(artId));
        render("/modify.html");
}

BeetlRenderFactory 默认使用FileResourceLoader ，其根目录位于WebRoot目录下，如果你需要修改到别的目录，可以设置配置文件，如

RESOURCE.root= /WEB-INF/template/

https://git.oschina.net/xiandafu/beetl-jfinal-sample 有完整例子，采用jfinal+beetl写的一个博客系统

https://git.oschina.net/xiandafu/jfinal_beet_beetsql_btjson 同上，但DAO部分采用了BeetlSql

JFinal3 与 Jfinal2.0不兼容，且不像Appache Common Lang那样，不兼容情况下采用不同的包名，导致了Beetl不能同时兼容：如果想在beetl（2.7.10）以后版本中仍然使用Jfinal2，需要自己写集成代码，自己写一个IMainRenderFactory的实现类

//Jfinal2 集成
import java.io.IOException;
import org.beetl.core.Configuration;
import org.beetl.core.GroupTemplate;
import org.beetl.core.ResourceLoader;
import org.beetl.core.resource.WebAppResourceLoader;
import com.jfinal.kit.PathKit;
import com.jfinal.render.IMainRenderFactory;
import com.jfinal.render.Render;
public class Jfinal2BeetlRenderFactory implements IMainRenderFactory
{
    public static String viewExtension = ".html";
    public static GroupTemplate groupTemplate = null;
    public Jfinal2BeetlRenderFactory()
    {
        init(PathKit.getWebRootPath());
        //        init(null); use jfinalkit instead
    }
    public Jfinal2BeetlRenderFactory(ResourceLoader resourceLoader)
    {
        if (groupTemplate != null)
        {
            groupTemplate.close();
        }
        try
        {
            Configuration cfg = Configuration.defaultConfiguration();
            groupTemplate = new GroupTemplate(resourceLoader, cfg);
        }
        catch (IOException e)
        {
            throw new RuntimeException("加载GroupTemplate失败", e);
        }
    }
    public Jfinal2BeetlRenderFactory(String templateRoot)
    {
        init(templateRoot);
    }
    private void init(String root)
    {
        if (groupTemplate != null)
        {
            groupTemplate.close();
        }
        try
        {
            Configuration cfg = Configuration.defaultConfiguration();
            WebAppResourceLoader resourceLoader = new WebAppResourceLoader(root);
            groupTemplate = new GroupTemplate(resourceLoader, cfg);
        }
        catch (IOException e)
        {
            throw new RuntimeException("加载GroupTemplate失败", e);
        }
    }
    public Render getRender(String view)
    {
        return new BeetlRender(groupTemplate, view);
    }
    public String getViewExtension()
    {
        return viewExtension;
    }
}

业务逻辑代码:

import org.beetl.core.GroupTemplate;
import org.beetl.core.exception.BeetlException;
import org.beetl.ext.web.WebRender;
import com.jfinal.render.Render;
import com.jfinal.render.RenderException;
//Jfinal2 集成
public class BeetlRender extends Render
{
    GroupTemplate gt = null;
    private transient static final String encoding = getEncoding();
    private transient static final String contentType = "text/html; charset=" + encoding;
    public BeetlRender(GroupTemplate gt, String view)
    {
        this.gt = gt;
        this.view = view;
    }
    @Override
    public void render()
    {
        try
        {
            response.setContentType(contentType);
            WebRender webRender = new WebRender(gt);
            webRender.render(view, request, response);
        }
        catch (BeetlException e)
        {
            throw new RenderException(e);
        }
    }
}

然后在Jfinal2里配置完成

import org.beetl.ext.jfinal.BeetlRenderFactory
public class DemoConfig extends JFinalConfig{
        public void configConstant(Constants me){
                me.setMainRenderFactory(new Jfinal2BeetlRenderFactory());
                // 获取GroupTemplate ,可以设置共享变量等操作
                GroupTemplate groupTemplate = Jfinal2BeetlRenderFactory.groupTemplate ;
        }
}