package modelframeworkdemo;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.URL;
import java.net.URLConnection;
import java.util.Date;

public class CSHtml {
    void display() {
        try {
            String addr = "http://www.pw.utc.com/vgn-ext-templating/v/PWSearch?keyWord=engine";
            // 将用户输入的URL字符串传入URL类对象
            URL url = new URL(addr);
            // 创建URLConnection对象，用URL的openConnection方法将连接通过返回给URLConnection的对象
            // 实际上URL的openConnection的返回值就是一个URLConnection
            URLConnection c = url.openConnection(); // *
            // 用URLConnection的connect()方法建立连接
            c.connect(); // *
            // 显示该连接的相关信息，这些都是URLConnection的方法
            System.out.println("内容类型: " + c.getContentType());
            System.out.println("内容长度: " + c.getContentLength());
            System.out.println("创建日期: " + new Date(c.getDate()));
            System.out.println("最后修改日期: " + new Date(c.getLastModified()));
            System.out.println("终止日期: " + new Date(c.getExpiration()));

            InputStream is = c.getInputStream(); // *
            InputStreamReader isr = new InputStreamReader(is);
            BufferedReader br = new BufferedReader(isr);
            char ch;
            System.out.println("字节流长度： " + br.toString().length());
            int msg = 0;   
                         int i = 0;
            while ((msg = br.read()) != -1)   {  
                                System.out.println(msg + "   " + (char)msg);   
                        } 
            System.out.println(br.read());
            br.close();
        } catch (Exception e) {
            System.out.println(e);
        }
    }

    public static void main(String[] args) {
        CSHtml app = new CSHtml();
        app.display();
    }
}

    //读取指定url的内容并转换为xml文档
    public Document doQuery1(String url)throws Exception{
        URL u = new URL(url);
    HttpURLConnection conn = (HttpURLConnection)(u.openConnection()); //
    conn.setDoOutput(false);
    conn.setDoInput(true);            
    conn.setUseCaches(false);            
    conn.setRequestMethod("GET");//GET
    conn.connect();
        
    int code = conn.getResponseCode();
    if(code!=HttpURLConnection.HTTP_OK){
        throw new Exception("远程没有返回正确结果，返回【"+code+"】。");
    }            
        
    //反馈..                
    /*
    //直接把结果打印出来
    InputStream in = conn.getInputStream();        
    BufferedReader br=new BufferedReader(new InputStreamReader(in));
    String t=null;
    while((t=br.readLine())!=null){
        System.out.println(t);
    }
    return null;
    */
    
    //正常解析
    InputStream in = conn.getInputStream();        
    Document doc=Sys.loadXML(in);
    return doc;        
    }

------解决方案--------------------

我并不认为楼主的方法有什么不妥，担心是缓冲区大小的原因，所以，换了个方法读。
别说我BT，这样可以不用考虑编码问题，如果有乱码那就修改控制台的编码和网页编码相同就行了。
Java code
import java.io.InputStream;
import java.net.URL;
import java.net.URLConnection;

public class CSHtml {
    void display() {
        try {
            String addr = "http://www.pw.utc.com/vgn-ext-templating/v/PWSearch?keyWord=engine";
            URL url = new URL(addr);
            URLConnection c = url.openConnection(); // *
            c.connect(); // *
            InputStream is = c.getInputStream();
            byte [] b = new byte[102400];
            int i=0;
            while((i=is.read(b,0,b.length))!=-1){
                System.out.write(b, 0, i);
            }
            is.close();
        } catch (Exception e) {
            System.out.println(e);
        }
    }

    public static void main(String[] args) {
        CSHtml app = new CSHtml();
        app.display();
    }
}