Java向文件写数据的3种方式

朴灿烈づ我的快乐病毒、 2023-02-26 06:28 27阅读 0赞

### Java向文件写数据的3种方式 ###

下边列举出了三种向文件中写入数据的方式，当然还有其他方式，帮助自己理解文件写入类的继承关系。类的关系：  
file->fileoutputstream->outputstreamWriter(FileWriter继承outputstreamWriter对象)  
测试代码：

import java.io.File;
    import java.io.FileOutputStream;
    import java.io.FileWriter;
    import java.io.IOException;
    import java.io.OutputStreamWriter;
    
    /**
     * 测试向文件中写文件
     * 
     * @author lenovo
     * 
     */
    public class TestWirteFile {
        
    
        /**
         * @param args
         * @throws IOException
         */
        public static void main(String[] args) throws IOException {
        
            String sContent = "2015年的双十一真的是非常火爆!";
            String sDestFile = "F:/myWrite.txt";
            File destFile = new File(sDestFile);
            if (!destFile.exists()) {
        
                destFile.createNewFile();
            }
    
            // 1.向文件写入内容
            // writeByFileWrite(sDestFile, sContent);
    
            // 2.FileOutputStream向文件写入内容
            // writeByFileWrite(sDestFile, sContent);
    
            // 2.OutputStreamWriter向文件写入内容
            writeByOutputStreamWrite(sDestFile, sContent);
        }
    
        /**
         * 用FileWrite向文件写入内容
         * 
         * @param _destFile
         * @throws IOException
         */
        public static void writeByFileWrite(String _sDestFile, String _sContent)
                throws IOException {
        
            FileWriter fw = null;
            try {
        
                fw = new FileWriter(_sDestFile);
                fw.write(_sContent);
            } catch (Exception ex) {
        
                ex.printStackTrace();
            } finally {
        
                if (fw != null) {
        
                    fw.close();
                    fw = null;
                }
            }
        }
    
        /**
         * 用FileOutputStream向文件写入内容
         * 
         * @param _destFile
         * @throws IOException
         */
        public static void writeByFileOutputStream(String _sDestFile,
                String _sContent) throws IOException {
        
            FileOutputStream fos = null;
            try {
        
                fos = new FileOutputStream(_sDestFile);
                fos.write(_sContent.getBytes());
            } catch (Exception ex) {
        
                ex.printStackTrace();
            } finally {
        
                if (fos != null) {
        
                    fos.close();
                    fos = null;
                }
            }
        }
    
        /**
         * 用OutputStreamWrite向文件写入内容
         * 
         * @param _destFile
         * @throws IOException
         */
        public static void writeByOutputStreamWrite(String _sDestFile,
                String _sContent) throws IOException {
        
            OutputStreamWriter os = null;
            FileOutputStream fos = null;
            try {
        
                fos = new FileOutputStream(_sDestFile);
                os = new OutputStreamWriter(fos, "UTF-8");
                os.write(_sContent);
            } catch (Exception ex) {
        
                ex.printStackTrace();
            } finally {
        
                if (os != null) {
        
                    os.close();
                    os = null;
                }
                if (fos != null) {
        
                    fos.close();
                    fos = null;
                }
    
            }
        }
    
    }