我必须在数据库中填入我的CSV中的数据（大约30列）。 我需要编写代码，用我的CSV中的数据自动填充我的数据库。我应该使用SQLite来做到这一点。（或者HSQL）
我对所有人都是新手，所以请不要粗鲁。
有可能吗？ 有什么建议吗？
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编辑：所以我到目前为止。
package importCSV;
import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.SQLException;
public class ImportData
{
public ImportData()
{
}
public static void main(String[] args)
{
createDB("tollerName.db");
read();
createTable("tollerName.db");
}
public static void createDB(String name)
{
String url = "jdbc:sqlite:C:/sqlite/db/" + name;
try(Connection conn = DriverManager.getConnection(url))
{
if (conn != null)
{
System.out.println("DB erstellt");
}
} catch (SQLException e)
{
e.printStackTrace();
}
}
public static void createTable(String name)
{
String url = "jdbc:sqlite:C:/sqlite/db/" + name;
try
{
Connection conn = DriverManager.getConnection(url);
String table = "table("
+ "Bauprojekt text primary key not null,"
+ "Bauprojektnummer integer not null,"
+ "Auftragsnummer integer not null,"
+ "Trassierung integer not null,"
+ "JahrSAP integer not null,"
+ "ProjektnummerSPA integer not null,"
+ "Anlagenzahl integer not null,"
+ "Aktuelle Leitungslaenge integer not null,"
+ "Vorgaenge zum Projekt integer not null,"
+ "Vertraege zum Projekt integer not null,"
+ "Firma text not null,"
+ "Flurst integer not null,"
+ "Blatt integer not null,"
+ "Verf text not null,"
+ "Anl text not null,"
+ "RE text not null,"
+ "LL integer not null,"
+ "Breite SS integer not null,"
+ "Flaeche RA integer not null,"
+ "Entsch integer not null,"
+ "Haupteigentuemer text not null,"
+ "Gemarkung text not null,"
+ "Grundbuchamt text not null,"
+ "Strase text not null,"
+ "Hausnummer integer not null,"
+ "Hausnummerzusatz text not null,"
+ "Ort text not null,"
+ "plz integer not null,"
+ "VkWert real not null,"
+ "prozent BPD real not null,"
+ "Anlage real not null,"
+ "GFR null not null,"
+ "GBA text not null,"
+ "Empfaenger text not null,"
+ "Bank text not null,"
+ "IBAN text not null,"
+ "BIC integer not null,"
+ "von text not null,"
+ "an text not null,"
+ "Jahr der Vergabe integer not null,"
+ "Zahlungsgrund text not null,"
+ "Netto real not null,"
+ "Aufwand real not null,"
+ "Umsatzsteuer real not null,"
+ ")";
PreparedStatement pre;
pre = conn.prepareStatement(table);
pre.executeUpdate();
pre.close();
}
catch (SQLException e)
{
e.printStackTrace();
}
System.out.println("done");
}
public static void read()
{
String csv = "C:\\Users\\schneider\\Desktop\\Schneider\\Excel \\DienstbarkeitenTabelle.csv";
BufferedReader br = null;
String line = "";
String csvSplitBy = ";";
try
{
br = new BufferedReader(new FileReader(csv));
while((line = br.readLine()) != null)
{
String[] table = line.split(csvSplitBy);
}
}
catch (FileNotFoundException e)
{
e.printStackTrace();
}
catch (IOException e)
{
e.printStackTrace();
}
finally
{
if(br == null)
try
{
br.close();
}
catch (IOException e)
{
e.printStackTrace();
}
}
System.out.println("Red");
}
}
这是我的所有代码。 我在这做错了什么？ ＆＃34; println＆＃34;命令执行但我仍然收到此错误：
org.sqlite.SQLiteException: [SQLITE_ERROR] SQL error or missing database (near "table": syntax error)
at org.sqlite.core.DB.newSQLException(DB.java:909)
at org.sqlite.core.DB.newSQLException(DB.java:921)
at org.sqlite.core.DB.throwex(DB.java:886)
at org.sqlite.core.NativeDB.prepare_utf8(Native Method)
at org.sqlite.core.NativeDB.prepare(NativeDB.java:127)
at org.sqlite.core.DB.prepare(DB.java:227)
at org.sqlite.core.CorePreparedStatement.<init>(CorePreparedStatement.java:41)
at org.sqlite.jdbc3.JDBC3PreparedStatement.<init>(JDBC3PreparedStatement.java:30)
at org.sqlite.jdbc4.JDBC4PreparedStatement.<init>(JDBC4PreparedStatement.java:19)
at org.sqlite.jdbc4.JDBC4Connection.prepareStatement(JDBC4Connection.java:48)
at org.sqlite.jdbc3.JDBC3Connection.prepareStatement(JDBC3Connection.java:263)
at org.sqlite.jdbc3.JDBC3Connection.prepareStatement(JDBC3Connection.java:235)
at importCSV.ImportData.createTable(ImportData.java:99)
at importCSV.ImportData.main(ImportData.java:23)
答案 0 :(得分：0)
好吧，我使用类BufferedReader来读取csv文件。
一个例子是
BufferedReader reader = null;
try {
File file = new File("myFile.csv"); // path to "MyFile.csv"
reader = new BufferedReader(new FileReader(file));
String line;
while ((line = reader.readLine()) != null) {
String[] splitString = line.split(";"); // split by the separator
}
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
reader.close();
} catch (IOException e) {
e.printStackTrace();
}
}
reader.readLine()会在.csv文件中为您提供准确的一行。之后你必须将你所拥有的String行拆分成任何行分隔的行（在大多数情况下，行由“;”分隔）。然后，您将每个元素都保存在一行中。
为了将您从.csv文件中读取的数据插入到sql-lite数据库中，请使用this example
修改
你的table-command有一些错误：
这个表命令应该可以正常工作（我已经改变了一点，例如PLZ的类型，这不应该是一个数字，因为你不用它来计算）：
String table = "CREATE TABLE Dienstbarkeit" +
"(" +
" bauprojekt NOT NULL TEXT PRIMARY KEY," +
" bauprojektnummer NOT NULL INTEGER ," +
" auftragsnummer NOT NULL INTEGER ," +
" trassierung NOT NULL INTEGER ," +
" jahrspa NOT NULL INTEGER ," +
" projektnummerspa NOT NULL INTEGER ," +
" anlagenzahl NOT NULL INTEGER ," +
" akt_leitungslaenge NOT NULL INTEGER ," +
" vorgaenge_zum_proj NOT NULL INTEGER ," +
" vertraege_zum_proj NOT NULL INTEGER ," +
" firma NOT NULL TEXT ," +
" flurst NOT NULL INTEGER ," +
" blatt NOT NULL INTEGER ," +
" verf NOT NULL TEXT ," +
" Verf NOT NULL TEXT ," +
" Anl NOT NULL TEXT ," +
" RE NOT NULL TEXT ," +
" LL NOT NULL INTEGER ," +
" Breite_SS NOT NULL INTEGER ," +
" Flaeche_RA NOT NULL INTEGER ," +
" Entsch NOT NULL INTEGER ," +
" Haupteigentuemer NOT NULL TEXT ," +
" Gemarkung NOT NULL TEXT ," +
" Grundbuchamt NOT NULL TEXT ," +
" Strasse NOT NULL TEXT ," +
" Hausnummer NOT NULL INTEGER ," +
" Hausnummerzusatz NOT NULL TEXT ," +
" Ort NOT NULL TEXT ," +
" plz NOT NULL TEXT ," +
" VkWert NOT NULL REAL ," +
" prozent_BPD NOT NULL REAL ," +
" Anlage NOT NULL REAL ," +
" GFR NOT NULL TEXT ," +
" GBA NOT NULL TEXT ," +
" Empfaenger NOT NULL TEXT ," +
" Bank NOT NULL TEXT ," +
" IBAN NOT NULL TEXT ," +
" BIC NOT NULL INTEGER ," +
" von NOT NULL TEXT ," +
" an NOT NULL TEXT ," +
" jahr_der_vergabe NOT NULL INTEGER ," +
" zahlungsgrund NOT NULL TEXT ," +
" Netto NOT NULL REAL ," +
" Aufwand NOT NULL REAL ," +
" Umsatzsteuer NOT NULL REAL " +
")";