vip.breakpoint.utils.FileUtils Maven / Gradle / Ivy
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package vip.breakpoint.utils;
import vip.breakpoint.annotation.MParam;
import vip.breakpoint.exception.EasyToolException;
import vip.breakpoint.log.WebLogFactory;
import vip.breakpoint.log.adaptor.Logger;
import java.io.*;
import java.nio.charset.StandardCharsets;
/**
* 写入文件以及读取文件
*
* @author breakpoint/赵先生
* 2020/09/03
*/
public abstract class FileUtils {
/**
* 日志的操作
*/
private static final Logger log = WebLogFactory.getLogger(FileUtils.class);
// 将数据写入文件
public static boolean writeBytesToFile(@MParam("二进制数据") byte[] bytes,
@MParam("文件名") String fileName,
@MParam("文件地址") String filePath) throws EasyToolException {
if (null == bytes || bytes.length == 0) return false;
try {
EasyVerifyUtils.verifyStringIsNotNull(fileName, filePath);
} catch (EasyToolException e) {
return false;
}
File dir = new File(filePath);
if (!dir.exists()) {
if (!dir.mkdirs()) {
throw new EasyToolException("请更改该文件夹[" + filePath + "]的权限，新建文件夹失败！！");
}
}
FileOutputStream fos = null;
try {
fos = new FileOutputStream(new File(dir, fileName));
fos.write(bytes);
fos.flush();
// 保存成功的情况
return true;
} catch (Exception e) {
return false;
} finally {
if (null != fos) {
try {
fos.close();
} catch (IOException e) {
//e.printStackTrace();
}
}
}
}
private static ByteArrayOutputStream getInitByteArrayOutputStream() {
return new ByteArrayOutputStream();
}
// 从文件流里面读取我们的数据 注意 ：已经将文件流进行了关闭的操作
public static byte[] readBytesFromInputStream(@MParam("文件的输入流") InputStream inputStream)
throws EasyToolException {
if (null == inputStream) throw new EasyToolException("输入流不能为空");
ByteArrayOutputStream bos = null;
try {
bos = getInitByteArrayOutputStream();
byte[] bytes = new byte[1024];
int len = -1;
while ((len = inputStream.read(bytes)) != -1) {
bos.write(bytes, 0, len);
}
// 返回数据
return bos.toByteArray();
} catch (Exception e) {
return null;
} finally {
if (null != bos) {
try {
bos.close();
} catch (IOException e) {
//e.printStackTrace();
}
}
}// end finally
}
// 读取文件数据
public static byte[] readBytesFromFile(@MParam("文件名") String fileName,
@MParam("文件路径") String filePath) throws EasyToolException {
EasyVerifyUtils.verifyStringIsNotNull(fileName, filePath);
File file = new File(filePath, fileName);
if (!file.exists()) return null;
FileInputStream fis = null;
ByteArrayOutputStream bos = null;
try {
fis = new FileInputStream(file);
bos = getInitByteArrayOutputStream();
byte[] bytes = new byte[1024];
int len = -1;
while ((len = fis.read(bytes)) != -1) {
bos.write(bytes, 0, len);
}
// 返回数据
return bos.toByteArray();
} catch (Exception e) {
return null;
} finally {
if (null != fis) {
try {
fis.close();
} catch (IOException e) {
//e.printStackTrace();
}
}
if (null != bos) {
try {
bos.close();
} catch (IOException e) {
//e.printStackTrace();
}
}
}// end finally
}
// 复制文件的操作
public static boolean copyFile(@MParam("源文件名称") String oriFileName, @MParam("源文件地址") String oriFilePath,
@MParam("目标文件名字") String sinkFileName, @MParam("目标文件地址") String sinkFilePath)
throws EasyToolException {
EasyVerifyUtils.verifyString(oriFileName, "oriFileName");
EasyVerifyUtils.verifyString(oriFilePath, "oriFilePath");
EasyVerifyUtils.verifyString(sinkFileName, "sinkFileName");
EasyVerifyUtils.verifyString(sinkFilePath, "sinkFilePath");
byte[] bytes = readBytesFromFile(oriFileName, oriFilePath);
if (null != bytes && bytes.length > 0) {
try {
writeBytesToFile(bytes, sinkFileName, sinkFilePath);
return true;
} catch (Exception e) {
throw new EasyToolException("文件复制出现错误");
}
} else {
throw new EasyToolException("源文件不存在");
}
}
// 文件夹内部复制
public static boolean copyFile(@MParam("源文件") String oriFileName, @MParam("文件路径") String filePath,
@MParam("目标文件") String sinkFileName) throws EasyToolException {
return copyFile(oriFileName, filePath, sinkFileName, filePath);
}
// 文件的删除操作
public static boolean deleteFile(@MParam("文件名") String fileName, @MParam("文件路径") String filePath)
throws EasyToolException {
EasyVerifyUtils.verifyString(fileName, "fileName");
EasyVerifyUtils.verifyString(filePath, "filePath");
final File file = new File(filePath, fileName);
if (file.exists()) {
return file.delete();
}
return true;
}
// 删除文件
public static boolean deleteFile(final File file) throws EasyToolException {
EasyVerifyUtils.verifyObject(file, file.getName());
return file.exists() && file.delete();
}
// 获取字符串 从文件中
public static String getStringFromFile(@MParam("文件名") String fileName,
@MParam("文件路径") String filePath) {
return getStringFromFile(filePath + File.separator + fileName);
}
// 获取字符串重文件中
public static String getStringFromFile(@MParam("文件名") String absolutePath) {
StringBuilder jsonStr = new StringBuilder();
Reader reader = null;
try {
// 获取到文件
File file = new File(absolutePath);
if (!file.exists()) return null;
reader = new InputStreamReader(new FileInputStream(file), StandardCharsets.UTF_8);
int ch = 0;
while ((ch = reader.read()) != -1) {
jsonStr.append((char) ch);
}
return jsonStr.toString();
} catch (IOException e) {
log.error("文件读取失败 [{}]", e.getMessage());
return null;
} finally {
if (null != reader) {
try {
reader.close();
} catch (IOException e) {
// nothing to do
}
}
}
} // 获取字符串重文件中
public static String getStringFromFile(InputStream inputStream) {
StringBuilder jsonStr = new StringBuilder();
Reader reader = null;
try {
// 获取到文件
reader = new InputStreamReader(inputStream, StandardCharsets.UTF_8);
int ch = 0;
while ((ch = reader.read()) != -1) {
jsonStr.append((char) ch);
}
return jsonStr.toString();
} catch (IOException e) {
log.error("文件读取失败 [{}]", e.getMessage());
return null;
} finally {
if (null != reader) {
try {
reader.close();
} catch (IOException e) {
// nothing to do
}
}
}
}
}