java中导出txt文件公共方法
import java.io.BufferedReader;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.FileWriter;import java.io.IOException;import java.io.OutputStreamWriter;import java.io.PrintWriter;import java.io.Writer;public class WriteAndReadText { //textPath指要导出的文件的路径private String textPath;public String readText(String textname) {File file = new File(textPath + File.separator + textname);try {BufferedReader br = new BufferedReader(new java.io.FileReader(file));StringBuffer sb = new StringBuffer();String line = br.readLine();while (line != null) {sb.append(line);line = br.readLine();}br.close();return sb.toString();} catch (IOException e) {e.printStackTrace();return null;}}public byte[] readTextToBype(String textname) {File file = new File(textPath + File.separator + textname);try {FileInputStream fileInputStream = new FileInputStream(file);byte[] inOutb = new byte[fileInputStream.available()];fileInputStream.read(inOutb);fileInputStream.close();return inOutb;} catch (IOException e) {e.printStackTrace();return null;}} //textname：要导出的文件的名字；date：要导出的内容public boolean writeText(String textname, String date) {boolean flag = false;File filePath = new File(textPath);if (!filePath.exists()) {filePath.mkdirs();}try {PrintWriter writer=new PrintWriter(new OutputStreamWriter(new FileOutputStream(textPath + File.separator + textname),"UTF-8"));writer.write(date);flag = true;if (writer != null)writer.close();} catch (IOException e) {e.printStackTrace();}return flag;}public boolean writeByteText(String textname, byte[] date) {boolean flag = false;File filePath = new File(textPath);if (!filePath.exists()) {filePath.mkdirs();}try {//PrintWriter writer=new PrintWriter(new OutputStreamWriter(new FileOutputStream(textPath + File.separator + textname),"utf-8"));FileOutputStream fileOutputStream = new FileOutputStream(textPath + File.separator + textname);//Writer out = new OutputStreamWriter(fileOutputStream, "utf-8");fileOutputStream.write(date);flag = true;fileOutputStream.close();} catch (IOException e) {e.printStackTrace();}return flag;}public boolean appendText(String textName, String date) {boolean flag = false;File filePath = new File(textPath);if (!filePath.exists()) {filePath.mkdirs();}try {FileWriter fw = new FileWriter(textPath + File.separator + textName, true);fw.append(date);flag = true;if (fw != null)fw.close();} catch (IOException e) {e.printStackTrace();}return flag;}public String getTextPath() {return textPath;}public void setTextPath(String textPath) {this.textPath = textPath;}}?