1 讀取 本地文件
注意 InputStream 和 StringBuffer的使用,以及 一行一行讀取的語句!
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
public class Read{
private static String openFile(String filePath) {
File f = new File(filePath);
String ee = new String();
System.out.println("Opening file: " + filePath);
try
{
InputStream is = new FileInputStream(f);
BufferedReader reader = new BufferedReader(
new InputStreamReader(is));
StringBuffer buffer = new StringBuffer();
String line; // 用來保存每行讀取的內容
line = reader.readLine(); // 讀取第一行
while (line != null) { // 如果 line 爲空說明讀完了
buffer.append(line); // 將讀到的內容添加到 buffer 中
buffer.append(" "); // 添加換行符
line = reader.readLine(); // 讀取下一行
}
// System.out.print(buffer.toString());
ee = buffer.toString();
}
catch (FileNotFoundException e) {
e.printStackTrace();
}
catch (IOException e) {
e.printStackTrace();
}
return ee;
}
public static void main(String[] args){
System.out.print(Read.openFile("l:/fence.log"));
}
}
2 讀取URL制定的文件
是在上面的代碼基礎上,改制而成。
注意這一段代碼,由連接 給定 的 URL 而取出輸入流!,然後進行常規的讀取操作!
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
URLConnection urlconn = url.openConnection(); // 試圖連接並取得返回狀態碼
urlconn.connect();
HttpURLConnection httpconn =(HttpURLConnection)urlconn;
HttpResult = httpconn.getResponseCode();
if(HttpResult != HttpURLConnection.HTTP_OK) // 不等於HTTP_OK說明連接不成功
System.out.print("無法連接到");
else
{
int filesize = urlconn.getContentLength(); // 取數據長度
InputStreamReader isReader = new InputStreamReader(urlconn.getInputStream());
/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLConnection;
public class ReadURL{
private static String openFile(String filePath) {
int HttpResult; // 服務器返回的狀態
String ee = new String();
try
{
URL url =new URL(filePath); // 創建URL
URLConnection urlconn = url.openConnection(); // 試圖連接並取得返回狀態碼
urlconn.connect();
HttpURLConnection httpconn =(HttpURLConnection)urlconn;
HttpResult = httpconn.getResponseCode();
if(HttpResult != HttpURLConnection.HTTP_OK) // 不等於HTTP_OK說明連接不成功
System.out.print("無法連接到");
else
{
int filesize = urlconn.getContentLength(); // 取數據長度
InputStreamReader isReader = new InputStreamReader(urlconn.getInputStream());
BufferedReader reader = new BufferedReader(isReader);
StringBuffer buffer = new StringBuffer();
String line; // 用來保存每行讀取的內容
line = reader.readLine(); // 讀取第一行
while (line != null) { // 如果 line 爲空說明讀完了
buffer.append(line); // 將讀到的內容添加到 buffer 中
buffer.append(" "); // 添加換行符
line = reader.readLine(); // 讀取下一行
}
// System.out.print(buffer.toString());
ee = buffer.toString();
}
}
catch (FileNotFoundException e) {
e.printStackTrace();
}
catch (IOException e) {
e.printStackTrace();
}
return ee;
}
public static void main(String[] args){
System.out.print(ReadURL.openFile("http://166.111.180.102:8080/axis/services/Read?wsdl"));
}
}