java读取本地txt文件并插入数据库

1. package com.cniia.ny.web.control.configManage;
2. import java.io.BufferedReader;
3. import java.io.File;
4. import java.io.FileReader;
5. import java.io.IOException;
6. import java.sql.Connection;
7. import java.sql.DriverManager;
8. import java.sql.PreparedStatement;
9. import java.sql.ResultSet;
10. import java.sql.SQLException;
11. import java.util.ArrayList;
12. import java.util.List;
13. import java.util.Scanner;
14. public class InsertIntoDB {
15. //读取文本操作
16. public static String[] writeToDat(String path) {
17. File file = new File(path);
18. List<String> list = new ArrayList<String>();
19. String []strings = null;
20. try {
21. BufferedReader bw = new BufferedReader(new FileReader(file));
22. String line = null;
23. //因为不知道有几行数据，所以先存入list集合中
24. while((line = bw.readLine()) != null){
25. list.add(line);
26. }
27. bw.close();
28. } catch (IOException e) {
29. e.printStackTrace();
30. }
31. //确定数组长度
32. strings = new String[list.size()];
33. for(int i=0;i<list.size();i++){
34. String s = (String) list.get(i);
35. strings[i] = s;
36. }
37. return strings;
38. }
39. //连接数据库
40. public static Connection getConnection(String data,String user,String pwd){
41. Connection conn = null;
42. try {
43. Class.forName("com.mysql.jdbc.Driver");
44. conn =
    DriverManager.getConnection("jdbc:mysql://127.0.0.1:3306/"+ data
    +"?characterEncoding=UTF-8",user , pwd);
45. } catch (Exception e) {
46. e.printStackTrace();
47. }
48. return conn;
49. }
50. //插入数据库,只能为一个字段
51. public static boolean insertInto(String data,String table,String field,String user,String pwd,String []str){
52. try {
53. Connection conn = getConnection(data,user,pwd);
54. conn.setAutoCommit(false);
55. String sql = "INSERT INTO"+ table + "("+ field +") VALUES (?);";
56. PreparedStatement pstmt = conn.prepareStatement(sql);
57. for (int i = 0; i < str.length; i++) {
58. pstmt.setString(1, str[i]);
59. pstmt.executeUpdate();
60. //                        conn.commit();
61. }
62. conn.commit();
63. return true;
64. } catch (SQLException e) {
65. // TODO Auto-generated catch block
66. e.printStackTrace();
67. return false;
68. }
69. }
70. public static String[] query(String data,String table,String field,String user,String pwd){
71. try {
72. String []str = null;
73. int i = 0;
74. Connection conn = getConnection(data,user,pwd);
75. String sql = "select "+ field +" from" + table +";" ;
76. PreparedStatement pstmt = conn.prepareStatement(sql);
77. ResultSet rs = pstmt.executeQuery();
78. while (rs.next()) {
79. str[i] = rs.getString(field);
80. i++;
81. }
82. return str;
83. } catch (SQLException e) {
84. // TODO Auto-generated catch block
85. e.printStackTrace();
86. return null;
87. }
88. }
89. public  static void main(String[] args){
90. String []str2 = null;
91. String []str = null;
92. String []str3 = null;
93. boolean flage1 = true;
94. boolean flage2 = true;
95. boolean flage3 = true;
96. System.out.println("请输入目标文件绝对路径:");
97. Scanner sc = new Scanner(System.in);
98. String path = sc.next();
99. while(flage3){
100. if (path!=null&&!path.equals("")) {
101. flage3 = false;
102. str = writeToDat(path);
103. }else {
104. System.out.println("输入不能为空");
105. }
106. }
107. System.out.println("请输入所需连接的数据库名，表名，字段名(只能为一个)，用户名，密码，用“#”隔开:");
108. String strA = sc.next();
109. while(flage1){
110. if (strA!=null&&!strA.equals("")) {
111. flage1 = false;
112. while(flage2){
113. if (strA.indexOf("#")>=0) {
114. flage2 = false;
115. str2 = strA.split("#");
116. }else {
117. System.out.println("您输入的格式有错，请重新输入");
118. }
119. }
120. }else {
121. System.out.println("输入不能为空");
122. }
123. }
124. boolean b = insertInto(str2[0], str2[1], str2[2], str2[3], str2[4],str);
125. if(b){
126. System.out.println("插入成功!");
127. }else {
128. System.out.println("插入失败!");
129. }
130. str3 = query(str2[0], str2[1], str2[2], str2[3], str2[4]);
131. for (int i = 0; i < str3.length; i++) {
132. System.out.println(str3[i]);
133. }
134. }
135. }

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