读取文件，解决中文乱码问题

虽然文件设置为UTF-8，但是由于有中文，读取文件时产生乱码，这时需要在读取文件的流设置为UTF-8的形式，需加入如下代码：

   InputStream ifile = new FileInputStream("base.xml"); 
   InputStreamReader ir = new InputStreamReader(ifile, "UTF-8");    

下面以dom4j生成xml文件，和xml文件转换为java对象，做详细说明：

 

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;

import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.DocumentHelper;
import org.dom4j.Element;
import org.dom4j.io.OutputFormat;
import org.dom4j.io.SAXReader;
import org.dom4j.io.XMLWriter;

import com.bx.vo.Cpe;
/**
 * 操作base.xml文件
 * @author Administrator
 *
 */
public class CpeXmlUtil {

    //将传过来的对象转换成xml文件
    public boolean getXml(Cpe cpe){
        boolean isOk = false;
        Document doc = DocumentHelper.createDocument();
        Element cpeElement = doc.addElement("cpe");
        Element IpElement = cpeElement.addElement("ip");
        IpElement.addText(cpe.getIp());
        Element trPortElement = cpeElement.addElement("trport");
        trPortElement.addText(cpe.getTrPort());
        Element tcPortElement = cpeElement.addElement("tcport");
        tcPortElement.addText(cpe.getTcPort());
        Element cidElement = cpeElement.addElement("cid");
        cidElement.addText(cpe.getCid());
        Element pwdElement = cpeElement.addElement("pwd");
        pwdElement.addText(cpe.getPwd());
        try {
            File file = new File("base.xml");
            OutputFormat format = OutputFormat.createPrettyPrint();
            format.setEncoding("UTF-8");            //生成文件时，设置格式为UTF-8
            FileOutputStream fos = null;
            try {
                fos = new FileOutputStream(file);
            } catch (FileNotFoundException e) {
                e.printStackTrace();
            }
            XMLWriter writer = new XMLWriter(fos,format);
            writer.write(doc);
            writer.close();
            isOk = true;
        } catch (IOException e) {
            e.printStackTrace();
        }
        return isOk;
    }

    //从xml文件中获取Cpe对象
    public Cpe getCpe(){
        SAXReader reader = new SAXReader();
        Document doc = DocumentHelper.createDocument();
        try{
            InputStream ifile = new FileInputStream("base.xml");
            InputStreamReader ir = new InputStreamReader(ifile, "UTF-8");     //读取文件时，设置格式为UTF-8
            doc = reader.read(ir);
        }catch(Exception e){

        }
        Element ipElement = (Element) doc.selectNodes("//cpe//ip").get(0);
        Element trPortElement = (Element) doc.selectNodes("//cpe//trport").get(0);
        Element tcPortElement = (Element) doc.selectNodes("//cpe//tcport").get(0);
        Element cidElement = (Element) doc.selectNodes("//cpe//cid").get(0);
        Element pwdElement = (Element) doc.selectNodes("//cpe//pwd").get(0);
        Cpe cpe = new Cpe();
        cpe.setIp(ipElement.getText());
        cpe.setTrPort(trPortElement.getText());
        cpe.setTcPort(tcPortElement.getText());
        cpe.setCid(cidElement.getText());
        cpe.setPwd(pwdElement.getText());
        return cpe;

    }

    public static void main(String args[]){
        //模拟CPE对象
        Cpe cpe = new Cpe();
        cpe.setCid("2233441007");
        cpe.setIp("127.0.0.1");
        cpe.setPwd("123456");
        cpe.setTcPort("7547");
        cpe.setTrPort("搜狗");
        new CpeXmlUtil().getXml(cpe);
        CpeXmlUtil cxp= new CpeXmlUtil();
        cxp.getXml(cpe);
    }
}