BlogJava-guanxf-随笔分类-Jfinal

Jfinal读取Freemarker后renderHtml 源码

管先飞 — Sun, 19 May 2013 06:16:00 GMT

1、Controller：
Map rootMap = new HashMap();

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 rootMap;

public AppFreeMarkerRender(Map rootMap, String templateName) {

this.templateName=templateName;

this.rootMap=rootMap;

}

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

public void render() {

response.setContentType(contentType);

Enumeration 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 releaseParams = new HashMap();

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;

}

管先飞 2013-05-19 14:16 发表评论

Jfinal不能使用别名，p6spy监控数据库日志

管先飞 — Tue, 02 Apr 2013 10:40:00 GMT

问题原因：JFinal中根据索引查询列名。
1、重新新建DB类：
package com.microcorecn.jfinalex;

import java.sql.Connection;

import java.sql.PreparedStatement;

import java.sql.ResultSet;

import java.sql.SQLException;

import java.util.ArrayList;

import java.util.List;

import com.jfinal.plugin.activerecord.ActiveRecordException;

import com.jfinal.plugin.activerecord.DbKit;

public class DbEx {

static List query(Connection conn, String sql, Object... paras) throws SQLException {

List result = new ArrayList();

PreparedStatement pst = conn.prepareStatement(sql);

for (int i=0; i

pst.setObject(i + 1, paras[i]);

}

// for (int i=0; i

// pst.setObject(i + 1, paras[i]);

// }

ResultSet rs = pst.executeQuery();

int colAmount = rs.getMetaData().getColumnCount();

String[] cols = new String[colAmount];

for(int i = 0; i < colAmount; ++i)

{

cols[i] = rs.getMetaData().getColumnLabel(i + 1);

}

if (colAmount > 1) {

while (rs.next()) {

Object[] temp = new Object[colAmount];

for (int i=0; i

temp[i] = rs.getObject(cols[i]);

}

result.add(temp);

}

else if(colAmount == 1) {

while (rs.next()) {

result.add(rs.getObject(cols[0]));

}

if (rs != null) {try {rs.close();} catch (SQLException e) {}}

if (pst != null) {try {pst.close();} catch (SQLException e) {}}

return result;

}

public static List query(String sql, Object... paras) {

Connection conn = null;

try {

conn = DbKit.getConnection();

return query(conn, sql, paras);

} catch (Exception e) {

throw new ActiveRecordException(e);

} finally {

DbKit.close(conn);

}

2、查询信息：

List newAlbum=DbEx.query(sb.toString(), singerItem.get("id"));

if (newAlbum!= null) {

for(Object[] obj:newAlbum){

item.setBfpSingerId(obj[0]==null?"":obj[1].toString());

item.setSingerName(obj[1]==null?"":obj[1].toString());

item.setImgUrl(obj[2]==null?"":obj[2].toString());

item.setBfpAlbumId(obj[3]==null?"":obj[3].toString());

item.setNewAlbumName(obj[4]==null?"":obj[4].toString());

}

管先飞 2013-04-02 18:40 发表评论

JFinal获取字符串json或者获取list返回Json对象。

管先飞 — Fri, 15 Mar 2013 01:05:00 GMT

Object data=getObject();
if(data instanceof String) {

this.renderJson((String)data);

}else {

this.renderJson(data);

}

管先飞 2013-03-15 09:05 发表评论