数据库
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批量添加代码:
package com.hyhl.test; import java.sql.Connection; import java.sql.DriverManager; import java.sql.PreparedStatement; import java.sql.ResultSet; import java.sql.SQLException; import java.util.List; import java.util.logging.Level; import java.util.logging.Logger; import org.omg.PortableInterceptor.INACTIVE; import com.hyhl.DrugFactory.vo.DrugMumberDetailVo; import com.hyhl.patient.util.DataSourceUtils; import com.hyhl.util.DateTimeUtil; public class JDBCBatchInsert { private String o_url = "jdbc:mysql://localhost:3306/hy_iwrs_test"; private Connection conn = null; private String userName = "root"; private String password = "root"; /** * 使用PreparedStatement做插入 * @param size */ public void insertByBatchPrepareStat(List<DrugMumberDetailVo> list){ String startTi = DateTimeUtil.getFormatDateTime(new java.util.Date()); System.out.println("PreparedStatement做插入的开始时间"+startTi); Connection conn = null; try { Class.forName("com.mysql.jdbc.Driver"); conn = DriverManager.getConnection(o_url, userName, password); conn.setAutoCommit(false); String sql = "INSERT drug_number_detail_test(random,projectId,groupName,status) VALUES(?,?,?,?)"; PreparedStatement prest = conn.prepareStatement(sql,ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_READ_ONLY); for(DrugMumberDetailVo enter:list){ prest.setString(1, enter.getRandom()); prest.setInt(2, enter.getProject()); prest.setInt(3, enter.getGroup()); prest.setInt(4, enter.getStatus()); prest.addBatch(); } prest.executeBatch(); conn.commit(); conn.close(); String startTi1 = DateTimeUtil.getFormatDateTime(new java.util.Date()); System.out.println("PreparedStatement做插入的结结时间"+startTi1); } catch (SQLException ex) { Logger.getLogger(JDBCBatchInsert.class.getName()).log(Level.SEVERE, null, ex); } catch (ClassNotFoundException ex) { Logger.getLogger(JDBCBatchInsert.class.getName()).log(Level.SEVERE, null, ex); } }
测试类:
package com.hyhl.test; import java.util.ArrayList; import java.util.List; import javax.persistence.criteria.CriteriaBuilder.In; import org.junit.After; import org.junit.Before; import org.junit.Test; import com.hyhl.DrugFactory.vo.DrugMumberDetailVo; public class JDBCBatchInsertTest { JDBCBatchInsert jdbcBatchInsert = null; public JDBCBatchInsertTest() { } @Before public void setUp() { jdbcBatchInsert = new JDBCBatchInsert(); } @After public void tearDown() { jdbcBatchInsert = null; } @Test public void testPrepare() { List<DrugMumberDetailVo> list=new ArrayList<DrugMumberDetailVo>(); for(int i=0;i<20000;i++){ DrugMumberDetailVo query=new DrugMumberDetailVo(); query.setGroup(0); query.setProject(3); query.setStatus(1); int startNumber=0; if(i+1<10){ startNumber=Integer.valueOf("2100000"+String.valueOf(i+1)); }else if (i+1<100){ startNumber=Integer.valueOf("210000"+String.valueOf(i+1)); }else if(i+1<1000){ startNumber=Integer.valueOf("21000"+String.valueOf(i+1)); }else if(i+1<10000){ startNumber=Integer.valueOf("2100"+String.valueOf(i+1)); }else if(i+1<100000){ startNumber=Integer.valueOf("210"+String.valueOf(i+1)); }else if(i+1<1000000){ startNumber=Integer.valueOf("21"+String.valueOf(i+1)); } query.setRandom(String.valueOf(startNumber)); list.add(query); } jdbcBatchInsert.insertByBatchPrepareStat(list); } }
效率比for循环插入数据快跟多
原文:https://www.cnblogs.com/wyf-love-dch/p/8981281.html