XML文件:mssql.xml
<?xml version="1.0" encoding="UTF-8"?>
<reportenv>
<datasource>
<servername>localhost</servername>
<serverport>1433</serverport>
<databasename>news</databasename>
<username>sa</username>
<password></password>
</datasource>
</reportenv>
XML配置文件解析器:ConfigParser.java
package com.onechen.data.config;
import java.util.Properties;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;
class ConfigParser extends DefaultHandler {
//定义一个Properties 用来存放属性值
private Properties props;
private String currentSet;
private String currentName;
private StringBuffer currentValue = new StringBuffer();
// 构建器初始化props
public ConfigParser() {
this.props = new Properties();
}
public Properties getProps() {
return this.props;
}
// 定义开始解析元素的方法. 这里是将<xxx>中的名称xxx提取出来.
public void startElement(String uri, String localName, String qName,
Attributes attributes) throws SAXException {
currentValue.delete(0, currentValue.length());
this.currentName = qName;
}
// 这里是将<xxx></xxx>之间的值加入到currentValue
public void characters(char[] ch, int start, int length)
throws SAXException {
currentValue.append(ch, start, length);
}
// 在遇到</xxx>结束后,将之前的名称和值一一对应保存在props中
public void endElement(String uri, String localName, String qName)
throws SAXException {
props.put(qName.toLowerCase(), currentValue.toString().trim());
}
}
XML配置文件读取处理:ParseXML.java
package com.onechen.data.config;
import java.util.Properties;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
class ParseXML {
// 定义一个Properties 用来存放属性值
private Properties props;
public Properties getProps() {
return this.props;
}
public void parse(String filename) throws Exception {
// 将我们的解析器对象化
ConfigParser handler = new ConfigParser();
// 获取SAX工厂对象
SAXParserFactory factory = SAXParserFactory.newInstance();
factory.setNamespaceAware(false);
factory.setValidating(false);
// 获取SAX解析
SAXParser parser = factory.newSAXParser();
try {
// 将解析器和解析对象xml联系起来,开始解析
parser.parse(filename, handler);
// 获取解析成功后的属性
props = handler.getProps();
} finally {
factory = null;
parser = null;
handler = null;
}
}
}
读取XML配置文件:ReadConfigXml.java
package com.onechen.data.config;
import java.util.Properties;
public class ReadConfigXml {