Jfinal读取Freemarker后renderHtml 源码

Jfinal读取Freemarker后renderHtml 源码

1、Controller：
               Map<String, Object> rootMap = new HashMap<String, Object>();

ootMap.put("list",getMusicPublisList(page.getList()));

String templateName="appweb/music/index.ftl";

  Render appRender=new AppFreeMarkerRender(rootMap,templateName);

  this.render(appRender);

2、AppFreeMarkerRender（在FreeMarkerRender上修改）：

package com.microcorecn.common.utils;

import java.io.PrintWriter;

import java.util.Enumeration;

import java.util.HashMap;

import java.util.Locale;

import java.util.Map;

import java.util.Properties;

import javax.servlet.ServletContext;

import com.jfinal.render.Render;

import com.jfinal.render.RenderException;

import freemarker.template.Configuration;

import freemarker.template.ObjectWrapper;

import freemarker.template.Template;

import freemarker.template.TemplateException;

import freemarker.template.TemplateExceptionHandler;

/**

 * FreeMarkerRender.

 */

public class AppFreeMarkerRender extends Render {

private static final long serialVersionUID = -7649769283048920381L;

private transient static final String encoding = getEncoding();

private transient static final String contentType = "text/html; charset=" + encoding;

private String templateName;

private Map<String, Object>  rootMap;

public AppFreeMarkerRender(Map<String, Object> rootMap, String templateName) {

  this.templateName=templateName;

  this.rootMap=rootMap;

}

    

@SuppressWarnings({"unchecked", "rawtypes"})

public void render() {

response.setContentType(contentType);

        Enumeration<String> attrs = request.getAttributeNames();

Map root = new HashMap();

while (attrs.hasMoreElements()) {

String attrName = attrs.nextElement();

root.put(attrName, request.getAttribute(attrName));

}

         root.putAll(rootMap);

         

PrintWriter writer = null;

        try {

Template template = FreemarkerUtil.getAppConfiguration().getTemplate(this.templateName);

writer = response.getWriter();  //一边请求，一边render

template.process(root, writer); // Merge the data-model and the template

} catch (Exception e) {

throw new RenderException(e);

}

finally {

if (writer != null)

writer.close();

}

}

}

3、FreemarkerUtil ：
package com.microcorecn.common.utils;

import java.io.BufferedWriter;

import java.io.File;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.OutputStreamWriter;

import java.io.StringWriter;

import java.io.Writer;

import java.util.Enumeration;

import java.util.HashMap;

import java.util.Map;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import com.jfinal.kit.PathKit;

import com.jfinal.render.FreeMarkerRender;

import freemarker.cache.FileTemplateLoader;

import freemarker.template.Configuration;

import freemarker.template.DefaultObjectWrapper;

import freemarker.template.Template;

/**

 * freemarker生成html的工具类

 * 

 * @author Administrator

 * 

 */

public class FreemarkerUtil {

//保存所有参数,js路径,cs路径等

private static Map<String, Object> releaseParams = new HashMap<String, Object>();

static{

//releaseParams.put("csspath", "");

}

//配置

private static Configuration config = null;

private static Configuration appConfig = null;

/**

* appConfig配置所有参数

* 重写freemarker中的  reader方法，读取该配置文件

* @return

*/

public static Configuration getAppConfiguration()

{

if(appConfig == null)

{

//从freemarker中获取所有配置

appConfig = (Configuration)FreeMarkerRender.getConfiguration().clone();

try {

//设置模板路径

/* config.setDirectoryForTemplateLoading(new File(PathKit.getWebRootPath()));

config.setObjectWrapper(new DefaultObjectWrapper());*/

appConfig.setDirectoryForTemplateLoading(new File(PathKit.getWebRootPath()+"/WEB-INF/views/"));

appConfig.setObjectWrapper(new DefaultObjectWrapper());   

} catch (IOException e) {

// TODO log

}

}

return appConfig;

}