- import java.io.BufferedReader;
- import java.io.BufferedWriter;
- import java.io.File;
- import java.io.FileInputStream;
- import java.io.FileOutputStream;
- import java.io.IOException;
- import java.io.InputStreamReader;
- import java.io.OutputStreamWriter;
- import org.apache.commons.io.FileUtils;
- /**
- * 文件工具类
- */
- public class FileUtil {
- /**
- * 创建文件(文件存在,则删除)
- *
- * @param fileName
- * @return
- */
- public static File makeNewFile(String fileName) {
- try {
- File file = new File(fileName);
- if (file.exists()) {
- //文件存在,删除
- file.delete();
- } else {
- //文件不存在,先创建路径
- String filePath = fileName.substring(0, fileName.lastIndexOf(System.getProperty("file.separator")));
- file = new File(filePath);
- if (!file.exists()) {
- file.mkdirs();
- }
- }
- //创建文件
- file = new File(fileName);
- if (!file.exists()) {
- file.createNewFile();
- }
- return file;
- } catch (Exception e) {
- e.printStackTrace();
- return null;
- }
- }
- /**
- * 创建文件(文件存在,则删除)
- *
- * @param fileName
- * @param content
- * @return
- */
- public static int makeNewFile(String fileName, String content) {
- try {
- File file = new File(fileName);
- if (file.exists()) {
- //文件存在,删除
- file.delete();
- } else {
- //文件不存在,先创建路径
- String filePath = fileName.substring(0, fileName.lastIndexOf(System.getProperty("file.separator")));
- file = new File(filePath);
- if (!file.exists()) {
- file.mkdirs();
- }
- }
- //创建文件
- file = new File(fileName);
- if (!file.exists()) {
- file.createNewFile();
- }
- FileUtils.writeStringToFile(file, content, "UTF-8");
- return 0;
- } catch (Exception e) {
- e.printStackTrace();
- return -1;
- }
- }
- /**
- * 文件追加内容
- *
- * @param fileName
- * @param content
- * @return
- */
- public static int fileAppend(String fileName, String content) {
- BufferedWriter writer = null;
- try {
- //创建路径
- String filePath = fileName.substring(0, fileName.lastIndexOf(System.getProperty("file.separator")));
- File file = new File(filePath);
- if (!file.exists()) {
- file.mkdirs();
- }
- //创建文件
- file = new File(fileName);
- if (!file.exists()) {
- file.createNewFile();
- }
- //追加日志
- writer = new BufferedWriter(new OutputStreamWriter(
- new FileOutputStream(file, true), "UTF-8"));
- if (file.length() != 0) {//空文件
- writer.write("\r\n");
- }
- writer.write(content);
- } catch (IOException e) {
- e.printStackTrace();
- return -1;
- } finally {
- if (writer != null) {
- try {
- writer.close();
- } catch (IOException ex) {
- ex.printStackTrace();
- }
- }
- }
- return 0;
- }
- /**
- * 文件追加内容
- *
- * @param fileName
- * @param content
- * @return
- */
- public static int fileAppendGBK(String fileName, String content) {
- BufferedWriter writer = null;
- try {
- //创建路径
- String filePath = fileName.substring(0, fileName.lastIndexOf(System.getProperty("file.separator")));
- File file = new File(filePath);
- if (!file.exists()) {
- file.mkdirs();
- }
- //创建文件
- file = new File(fileName);
- if (!file.exists()) {
- file.createNewFile();
- }
- //追加日志
- writer = new BufferedWriter(new OutputStreamWriter(
- new FileOutputStream(file, true), "GBK"));
- if (file.length() != 0) {//空文件
- writer.write("\r\n");
- }
- writer.write(content);
- } catch (IOException e) {
- e.printStackTrace();
- return -1;
- } finally {
- if (writer != null) {
- try {
- writer.close();
- } catch (IOException ex) {
- ex.printStackTrace();
- }
- }
- }
- return 0;
- }
- /**
- * 把串内容写到文件指定行上,如果插入行与该行内容相同则覆盖,不同则插入到该行<br>
- * 如果插入行号<=0,则在文件最后追加一行
- *
- * @param fileName 文件名称,全路径
- * @param content 插入的行内容
- * @param insertLineNum 要插入到文件的行号
- * @return
- */
- public static int insertAssignedLineWithCompare(String fileName, String content,
- int insertLineNum) {
- BufferedWriter writer = null;
- BufferedReader reader = null;
- try {
- // 创建路径
- String filePath = fileName.substring(0, fileName.lastIndexOf(System
- .getProperty("file.separator")));
- File file = new File(filePath);
- if (!file.exists()) {
- file.mkdirs();
- }
- file = new File(fileName);
- if (!file.exists()) {
- // 文件不存在,新建文件,直接写入内容为一行
- file.createNewFile();
- writer = new BufferedWriter(new OutputStreamWriter(
- new FileOutputStream(file, true), "UTF-8"));
- writer.write(content);
- } else {
- // 文件已存在
- if (insertLineNum <= 0) {
- // 把内容追加到文件最后
- writer = new BufferedWriter(new OutputStreamWriter(
- new FileOutputStream(file, true), "UTF-8"));
- if (file.length() != 0) {// 非空文件
- writer.write("\r\n");//换行
- }
- writer.write(content);
- } else {
- // 把内容插入到指定行
- reader = new BufferedReader(new InputStreamReader(
- new FileInputStream(file), "UTF-8"));
- StringBuilder front = new StringBuilder();// 第insertLineNum行前面的内容
- StringBuilder back = new StringBuilder();// 第insertLineNum行后面的内容
- String insertLineStr = "";// 第insertLineNum行的内容
- String currentLineStr = reader.readLine();// 每一行内容
- int currentLineNum = 0;// 当前行号
- while (currentLineStr != null && !"".equals(currentLineStr)) {
- currentLineNum++;
- if (currentLineNum < insertLineNum) {
- front.append(currentLineStr).append("\r\n");
- } else if (currentLineNum == insertLineNum) {
- insertLineStr = currentLineStr;
- } else {
- back.append(currentLineStr).append("\r\n");
- }
- currentLineStr = reader.readLine();
- }
- //currentLineNum目前为文件最大行号
- if (currentLineNum < insertLineNum) {
- // 写入行号大于文件最大行号,把内容追加到文件最后
- front.append(content);
- } else {
- // 把内容追加到文件指定行
- if (content.indexOf(insertLineStr) < 0) {
- // 没有插入过此行,插入
- front.append(content).append("\r\n").append(insertLineStr);
- if (back.toString() != null && !"".equals(back.toString())) {
- front.append("\r\n").append(back.substring(0, back.lastIndexOf("\r\n")));
- }
- } else {
- // 插入过此行,覆盖
- front.append(content);
- if (back.toString() != null && !"".equals(back.toString())) {
- front.append("\r\n").append(back.substring(0, back.lastIndexOf("\r\n")));
- }
- }
- }
- // 重新创建文件
- try {
- reader.close();
- } catch (IOException ex) {
- ex.printStackTrace();
- return -1;
- }
- file.delete();
- file.createNewFile();
- writer = new BufferedWriter(new OutputStreamWriter(
- new FileOutputStream(file, true), "UTF-8"));
- writer.write(front.toString());
- }
- }
- } catch (Exception e) {
- e.printStackTrace();
- return -2;
- } finally {
- if (writer != null) {
- try {
- writer.close();
- } catch (IOException ex) {
- ex.printStackTrace();
- }
- }
- }
- return 0;
- }
- /**
- * 获取文件
- *
- * @param filePath
- * @return
- */
- public static File getFile(String filePath) {
- try {
- File file = new File(filePath);
- if (!file.exists()) {
- file.getParentFile().mkdirs();
- file.createNewFile();
- }
- return file;
- } catch (Exception ex) {
- ex.printStackTrace();
- return null;
- }
- }
- /**
- * 读取文件内容
- *
- * @param file
- * @return
- */
- public static String getFileContent(File file) {
- StringBuilder fileContent = new StringBuilder();
- try {
- if (file.isFile() && file.exists()) {
- InputStreamReader read = new InputStreamReader(new FileInputStream(file), "UTF-8");
- BufferedReader reader = new BufferedReader(read);
- String line;
- while ((line = reader.readLine()) != null) {
- fileContent.append(line);
- }
- read.close();
- }
- } catch (Exception ex) {
- ex.printStackTrace();
- }
- return fileContent.toString();
- }
- }