1 package com.dingheng.util;
2
3 import java.io.*;
4 import java.util.ArrayList;
5 import java.util.List;
6
7 /**
8 * TODO
9 *
10 * @ClassName: FileUtil
11 * @author: DingH
12 * @since: 2019/5/28 9:05
13 */
14 public class FileUtil {
15
16 /**
17 * 一行写入文件,末尾自动添加\n
18 * @param path
19 * @param line
20 * @param is_append
21 * @param encode
22 */
23 public static void writeLog(String path, String line, boolean is_append, String encode)
24 {
25 try
26 {
27 File file = new File(path);
28 if(!file.exists())
29 file.createNewFile();
30 FileOutputStream out = new FileOutputStream(file, is_append); //true表示追加
31 StringBuffer sb = new StringBuffer();
32 sb.append(line + "\n");
33 out.write(sb.toString().getBytes(encode));//
34 out.close();
35 }
36 catch(IOException ex)
37 {
38 System.out.println(ex.getStackTrace());
39 }
40 }
41
42 /**
43 * 写入文件,末尾自动添加\n
44 * @param lines
45 * @param filePath
46 * @param ifContinueWrite
47 */
48 public static void writeFile(List<String> lines, String filePath, boolean ifContinueWrite){
49 try{
50 BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(filePath),"utf-8"));
51 for(String line : lines){
52 bw.write(line+"\n");
53 }
54 bw.close();
55 }catch(Exception e){
56 e.printStackTrace();
57 }
58 }
59
60
61 /**
62 * 加入编码
63 * 整个文件以string放回，添加\n换行
64 * @param path
65 * @return
66 */
67 public static String readLogByStringAndEncode(String path, String encode)
68 {
69 StringBuffer sb=new StringBuffer();
70 String tempstr=null;
71 try {
72 File file=new File(path);
73 if(!file.exists())
74 throw new FileNotFoundException();
75 FileInputStream fis=new FileInputStream(file);
76 BufferedReader br=new BufferedReader(new InputStreamReader(fis, encode));
77 while((tempstr=br.readLine())!=null) {
78 sb.append(tempstr + "\n");
79 }
80 } catch(IOException ex) {
81 System.out.println(ex.getStackTrace());
82 }
83 return sb.toString();
84 }
85
86 /**
87 * 按行读取文件，以list<String>的形式返回
88 * @param filePath
89 * @return
90 */
91 public static List<String> readLogByList(String filePath){
92 List<String> lines = new ArrayList<String>();
93 try {
94 BufferedReader br = new BufferedReader(new InputStreamReader(new FileInputStream(filePath),"utf-8"));
95 String line = null;
96 while( (line = br.readLine()) != null ){
97 lines.add(line);
98 }
99 br.close();
100 }catch(Exception e){
101 e.printStackTrace();
102 }finally {
103 return lines;
104 }
105 }
106
107 }
