把字符串或者字符串list写入一个特定的文件

红太狼 2023-01-03 04:11 155阅读 0赞

package com.centrin.process.utils;
    
    import java.io.*;
    import java.util.List;
    
    public class ExportFileUtils { 
    
        public static void writeFile(String tmp, String filePath) throws IOException { 
            BufferedWriter out = null;
            try { 
                out = new BufferedWriter(new OutputStreamWriter(
                        new FileOutputStream(new File(filePath), true)));
                out.write(tmp+"\r\n");
            } catch (Exception e) { 
                e.printStackTrace();
            } finally { 
                try { 
                    out.close();
                } catch (IOException e) { 
                    e.printStackTrace();
                }
            }
        }
    
        public static void writeFile(List<String> dataList, String filePath) throws IOException { 
            //String filePath = "D:/opt/mapping/out/mytest04.csv";//设置文件的路径
            File sqlFile = new File(filePath);    //创建备份文件对象
            FileOutputStream fos = null;//文件字节输出流
            OutputStreamWriter osw = null;//字节流转字符流
            BufferedWriter rw = null;//缓冲字符流
    
            try { 
                fos = new FileOutputStream(sqlFile);
                osw = new OutputStreamWriter(fos);
                rw = new BufferedWriter(osw);
                for (String tmp : dataList) { //遍历所有备份sql
                    rw.write(tmp);//向文件中写入sql
                    rw.newLine();//文件换行
                    rw.flush();//字符流刷新
                }
            } catch (FileNotFoundException e) { 
                e.printStackTrace();
            } catch (IOException e) { 
                e.printStackTrace();
            } finally { 
                //倒序依次关闭所有IO流
                if (rw != null) { 
                    try { 
                        rw.close();
                    } catch (IOException e) { 
                        e.printStackTrace();
                    }
                }
                if (osw != null) { 
                    try { 
                        osw.close();
                    } catch (IOException e) { 
                        e.printStackTrace();
                    }
                }
                if (fos != null) { 
                    try { 
                        fos.close();
                    } catch (IOException e) { 
                        e.printStackTrace();
                    }
                }
            }
        }
    }