JDBC的批处理操作三种方式 pstmt.addBatch()

最新推荐文章于 2025-06-02 20:42:21 发布

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本文详细介绍了使用JDBC进行批量操作的三种方式：预定义模式的SQL、混合模式的SQL和批量静态SQL。通过具体代码示例，展示了如何在Java中高效地执行批量插入、更新和删除等操作。

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package lavasoft.jdbctest;

import lavasoft.common.DBToolkit;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.sql.Statement;

/**

JDBC的批量操作三种方式
*/
public class BatchExeSQLTest {

  public static void main(String[] args) { 
          exeBatchStaticSQL(); 
  } 

  /** 
   * 批量执行预定义模式的SQL 
   */ 
  public static void exeBatchParparedSQL() { 
          Connection conn = null; 
          try { 
                  conn = DBToolkit.getConnection(); 
                  String sql = "insert into testdb.book (kind, name) values (?,?)"; 
                  PreparedStatement pstmt = conn.prepareStatement(sql); 
                  pstmt.setString(1, "java"); 
                  pstmt.setString(2, "jjjj"); 
                  pstmt.addBatch();                     //添加一次预定义参数 
                  pstmt.setString(1, "ccc"); 
                  pstmt.setString(2, "dddd"); 
                  pstmt.addBatch();                     //再添加一次预定义参数 
                  //批量执行预定义SQL 
                  pstmt.executeBatch(); 
          } catch (SQLException e) { 
                  e.printStackTrace(); 
          } finally { 
                  DBToolkit.closeConnection(conn); 
          } 
  } 

  /** 
   * 批量执行混合模式的SQL、有预定义的，还有静态的 
   */ 
  public static void exeBatchMixedSQL() { 
          Connection conn = null; 
          try { 
                  conn = DBToolkit.getConnection(); 
                  String sql = "insert into testdb.book (kind, name) values (?,?)"; 
                  PreparedStatement pstmt = conn.prepareStatement(sql); 
                  pstmt.setString(1, "java"); 
                  pstmt.setString(2, "jjjj"); 
                  pstmt.addBatch();    //添加一次预定义参数 
                  pstmt.setString(1, "ccc"); 
                  pstmt.setString(2, "dddd"); 
                  pstmt.addBatch();    //再添加一次预定义参数 
                  //添加一次静态SQL 
                  pstmt.addBatch("update testdb.book set kind = 'JAVA' where kind='java'"); 
                  //批量执行预定义SQL 
                  pstmt.executeBatch(); 
          } catch (SQLException e) { 
                  e.printStackTrace(); 
          } finally { 
                  DBToolkit.closeConnection(conn); 
          } 
  } 

  /** 
   * 执行批量静态的SQL 
   */ 
  public static void exeBatchStaticSQL() { 
          Connection conn = null; 
          try { 
                  conn = DBToolkit.getConnection(); 
                  Statement stmt = conn.createStatement(); 
                  //连续添加多条静态SQL 
                  stmt.addBatch("insert into testdb.book (kind, name) values ('java', 'java in aciton')"); 
                  stmt.addBatch("insert into testdb.book (kind, name) values ('c', 'c in aciton')"); 
                  stmt.addBatch("delete from testdb.book where kind ='C#'"); 
                  stmt.addBatch("update testdb.book set kind = 'JAVA' where kind='java'");

// stmt.addBatch(“select count(*) from testdb.book”); //批量执行不支持Select语句
//执行批量执行
stmt.executeBatch();
} catch (SQLException e) {
e.printStackTrace();
} finally {
DBToolkit.closeConnection(conn);
}
}
}

注意：JDBC的批处理不能加入select语句，否则会抛异常：
java.sql.BatchUpdateException: Can not issue SELECT via executeUpdate().
at com.mysql.jdbc.StatementImpl.executeBatch(StatementImpl.java:1007)