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How to generate XML in java

高洛峰
Release: 2017-01-11 13:25:38
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本文实例讲述了java生成XML的方法。分享给大家供大家参考,具体如下:

下拉框的生成,我是通过javascript读取xml文件生成的。Xml文件是根据数据库生成的。Xml文件只相当于页面到数据库的一道缓存。这样利于性能。生成xml文件又是一件繁琐的事情。只好交给机器去做了。真正的情景是程序定期自动或人为手动触发程序生成xml。今天我单独把xml文件生成的功能剥离出来写了一个小程序。

具体的实现是,使用jxl.jar读取(我承认我很喜欢使用Execel写配置)的SQL语句。SQL要指明哪些是名称、哪些是代码、哪些是父级代码。Mybatis查询数据,拼装报文写入文件。这次写了一个jar包程序。运行前请自备jre。

核心代码:XmlCreateService.java

package com.fitweber.service;
import java.io.IOException;
import java.io.InputStream;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;
import com.fitweber.util.CommonUtils;
import com.fitweber.util.ExecelUtils;
/**
 * <pre class="brush:php;toolbar:false">
 * XML文件生成器
 * 
* @author wheatmark hajima11@163.com * @version 1.00.00 *
 * 修改记录
 * 修改后版本:  修改人: 修改日期:  修改内容:
 * 
*/ public class XmlCreateService { @SuppressWarnings({ "rawtypes", "unused", "unchecked" }) public static void main(String[] argc){ String resource = "META-INF/conf/mybatis-config.xml"; String root = ""; InputStream inputStream; try { //拿到数据库连接 inputStream = Resources.getResourceAsStream(resource); SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream); SqlSession session = sqlSessionFactory.openSession(); //拿到查询参数 List requestList = ExecelUtils.readExecelSimple("xmlmaker.xls"); //定义变量 int i,j,listSize; String filename,sqlstament,temp;; HashMap requestMap = new HashMap(); Map map; StringBuffer buf = new StringBuffer(); for(Object l:requestList){ List list = (List)l; listSize = list.size(); filename =(String)list.get(1); sqlstament =(String)list.get(2); requestMap.put("sql", sqlstament); List result = session.selectList("com.fitweber.dao.XmlCreateDao.xmlDataQuery",requestMap); for(Object r:result){ buf.append(""); } CommonUtils.saveFile(null, (System.getProperty("user.dir")+"\\xml\\").replace("\\", "/")+filename, (""),false); buf.setLength(0); } session.close(); } catch (IOException e) { e.printStackTrace(); } } }
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