JDBC SQLite更新

Question

我是jdbc sqlite中的新成員。我想知道如何執行更新。比如我有一張叫人名的表，裏面有職業。我應該使用PreparedStatement嗎？

PreparedStatement change = conn.prepareStatement("Update people set name = ? "); 
change.setString(1, "John"); 

ResultSet rs = stat.executeQuery("select * from people where name = 'Gandhi';"); 
while (rs.next()) { 
    System.out.println("name = " + rs.getString("name")); 
    System.out.println("job = " + rs.getString("occupation")); 
} 
rs.close(); 
conn.close(); 

我想問的正確方法。謝謝你..

Answer 1

你可能想從後檢查Java and SQLite

例子：

package com.rungeek.sqlite; 

import java.sql.Connection; 
import java.sql.DriverManager; 
import java.sql.PreparedStatement; 
import java.sql.ResultSet; 
import java.sql.Statement; 

public class Test { 
public static void main(String[] args) throws Exception { 
    Class.forName("org.sqlite.JDBC"); 
    Connection conn = DriverManager.getConnection("jdbc:sqlite:test.db"); 
    Statement stat = conn.createStatement(); 
    stat.executeUpdate("drop table if exists people;"); 
    stat.executeUpdate("create table people (name, occupation);"); 
    PreparedStatement prep = conn.prepareStatement(
     "insert into people values (?, ?);"); 

    prep.setString(1, "Gandhi"); 
    prep.setString(2, "politics"); 
    prep.addBatch(); 
    prep.setString(1, "Turing"); 
    prep.setString(2, "computers"); 
    prep.addBatch(); 
    prep.setString(1, "Wittgenstein"); 
    prep.setString(2, "smartypants"); 
    prep.addBatch(); 

    conn.setAutoCommit(false); 
    prep.executeBatch(); 
    conn.setAutoCommit(true); 

    ResultSet rs = stat.executeQuery("select * from people;"); 
    while (rs.next()) { 
     System.out.println("name = " + rs.getString("name")); 
     System.out.println("job = " + rs.getString("occupation")); 
    } 
    rs.close(); 
    conn.close(); 
} 
} 

謝謝，

Answer 2

你是不是 「執行」 的更新。您需要撥打change.executeUpdate()才能將UPDATE語句發送到引擎。

（以及內存頁指出：在SQL字符串中刪除;）