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  • JDBC批量更新某个字段的值

    package com.cme.core;
    
    import java.sql.Connection;
    import java.sql.PreparedStatement;
    import java.sql.ResultSet;
    import java.sql.Statement;
    
    import com.cme.utils.JdbcUtils;
    
    public class Import {
    
        public static void main(String[] args) {
            // TODO Auto-generated method stub
            Connection conn = null;
            Statement ps = null;
            Statement  ps2 = null;
            String sql = "select id from pf_enterprise_info2";
            try {
                // 2.建立连接
                conn = JdbcUtils.getConnection();
                conn.setAutoCommit(false);
                ps = conn.createStatement();
                ps2 = conn.createStatement();
                ResultSet rs = ps.executeQuery(sql);
                int i = 0;
                while (rs.next()) { // 指针向下移动
                    String id = rs.getString(1);
                    i++;
                    String sql2 ="update pf_enterprise_info2 set enterprise_import_code=CONCAT(industry_code,'-',enterprise_nationality_code,'-',LPAD(LEFT(IFNULL(enterprise_import_code,0),8)+"+i+",8,'0')) where id='"+id+"';";
                    ps2.addBatch(sql2);
                }
                rs.close();
                ps.close();
                ps2.executeBatch(); 
                ps2.clearBatch();
                conn.commit();
            } catch (Exception e) {
                JdbcUtils.rollback(conn);
                e.printStackTrace();
            } finally {
                JdbcUtils.free(null, ps, conn);
            }
        }
    
    }
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  • 原文地址:https://www.cnblogs.com/yueyuepeng/p/6902136.html
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