Question

我使用jdbc在java中编程我需要运行一个脚本，创建2个表并插入每个表中大约30个记录但当我运行整个sql指令时只执行firt create语句，这是我的代码

public Statement qry;
//... set connection and others for sqlite3
qry.execute(strSql); //strSql contains the set of sql sentences

句子看起来像这样

CREATE TABLE "android_metadata" ("locale" TEXT DEFAULT "en_US");INSERT INTO android_metadata VALUES ("es_ES");CREATE TABLE "tblclientes" ("_id" INTEGER,"Nombres" varchar(25) DEFAULT NULL,"Apellidos" varchar(25) DEFAULT NULL,"RazSocial" varchar(20) DEFAULT NULL,"Direccion" varchar(50) DEFAULT NULL,"Ciudad" varchar(15) DEFAULT "Arequipa","Fono" varchar(12) DEFAULT NULL,"Fax" varchar(12) DEFAULT NULL,"Email" varchar(35) DEFAULT NULL,"Ruc" varchar(12) DEFAULT NULL,"latitud" decimal(20,14) DEFAULT NULL,"longitud" decimal(20,14) DEFAULT NULL,"ruta" varchar(10) DEFAULT NULL,"sincro" CHAR(10),"copiar" BOOL DEFAULT 1);INSERT INTO tblclientes VALUES (6, "Julia", "Lea Barrios", "", "Guillermo Mercado Mz-R Lte-22","Arequipa", "", "", "", "", "-16,34930944346466", "-71,56028982646531", "521", "", "1" ),(7, "Reyna ", "Mamani", "", "Villa Fontana Mz-18 Lte-1","Arequipa", "", "", "", "", "-16,37338828616529", "-71,49954834718501", "333", "", "1" ),(8, "Elizabeth", "Paco Toclla", "", "Villa Fontana Mz-7 Lte-7","Arequipa", "", "", "", "", "-16,37327397121976", "-71,49942636965591", "333", "", "1" ),(9, "Faustina ", "Mayhua", "", "Villa Paraiso Mz-B Cte-3 Lte-9","Arequipa", "", "", "", "", "0", "0", "0", "", "1" ),(10, "Marcelina", "Vilca", "", "Villa Cerrilos Mz-I Lte-1","Arequipa", "", "", "", "", "0", "0", "0", "", "1" ),(11, "Patricia", "Hinojosa Chirinos", "", "Villa Santa Maria Mz-B Lte-6","Arequipa", "", "", "", "", "-16,3233752620739", "-71,55582815082221", "544", "", "1" ),(12, "Lorenzo", "Mayta", "", "Urb. Nazareno Mz-C Lte-1 Zona B","Arequipa", "", "", "", "", "0", "0", "0", "", "1" ),(13, "Balbina ", "Sivincha", "", "Urb. Nazareno Mz-M Lte-20","Arequipa", "", "", "", "", "0", "0", "0", "", "1" ) ... and so on

我试图这样做但是100记录花了很长时间我想插入12000条记录

consulta = conexion.createStatement();
            consulta.addBatch("CREATE TABLE 'tblclientes' ('_id' INTEGER,'Nombres' varchar(25) DEFAULT NULL,'Apellidos' varchar(25) DEFAULT NULL,'RazSocial' varchar(20) DEFAULT NULL,'Direccion' varchar(50) DEFAULT NULL,'Ciudad' varchar(15) DEFAULT 'Arequipa','Fono' varchar(12) DEFAULT NULL,'Fax' varchar(12) DEFAULT NULL,'Email' varchar(35) DEFAULT NULL,'Ruc' varchar(12) DEFAULT NULL,'latitud' decimal(20,14) DEFAULT NULL,'longitud' decimal(20,14) DEFAULT NULL,'ruta' varchar(10) DEFAULT NULL,'sincro' CHAR(10),'copiar' BOOL DEFAULT 1)");
            consulta.addBatch("INSERT INTO tblclientes VALUES (6, 'Julia', 'Lea Barrios', '', 'Guillermo Mercado Mz-R Lte-22','Arequipa', '', '', '', '', '-16,34930944346466', '-71,56028982646531', '521', '', '1' )");
            consulta.addBatch("INSERT INTO tblclientes VALUES (6, 'Julia', 'Lea Barrios', '', 'Guillermo Mercado Mz-R Lte-22','Arequipa', '', '', '', '', '-16,34930944346466', '-71,56028982646531', '521', '', '1' )");

            consulta.executeBatch();

在Java中有效地执行此操作的方法是什么？

Answer 1

一些指示：

使用单个事务中的所有语句;
编译语句INSERT INTO tblclientes VALUES (?, ?, ?, ?, ?, ...) ONCE，对于每个数据行，只需绑定参数并执行。

这通常是使用SQL插入大型（和更小）数据的最佳方式。

这更快，因为（1）数据被写入存储一次，而不是每行插入，并且（2）insert语句被编译一次，而不是编译每个insert语句（只有数据正在改变，操作是相同的）。

这更安全，因为字符串数据作为参数绑定，因此无效字符不会破坏您的语句，也不允许恶意内容运行。

看看Prepared Statements。

我不是Java程序员，但你的代码应该是这样的：

Statement stmt = connection.createStatement();
stmt.executeUpdate("CREATE TABLE tblclientes (_id INTEGER, Nombres TEXT, Apellidos TEXT, RazSocial TEXT, Direccion TEXT, Ciudad TEXT DEFAULT 'Arequipa', Fono TEXT, Fax TEXT, Email TEXT, Ruc TEXT, latitud FLOAT, longitud FLOAT, ruta TEXT, sincro TEXT, copiar INT DEFAULT 1)");
PreparedStatement ins = connection.prepareStatement("INSERT INTO tblclientes VALUES (?,?,?,?,?,?,?,?,?,?,?,?,?,?,?)");
connection.setAutoCommit(false);
for(...i...) {
    ins.clearParameters();
    ins.setInt(1, id[i]); //1, 2, ...
    ins.setString(2, nombre[i]); //"Julia", ...
    ins.setString(3, apellidos[i]); //"Lea Barrios", ...
    ...
    ins.setDouble(11, latitud[i]); //-16,34930944346466, ...
    ins.setDouble(12, longitud[i]); //-71,56028982646531, ...
    ...
    ins.setInt(15, copiar[i]); //1, ...
    ins.execute();
}
connection.commit(); //All inserts are done now, at once!
connection.setAutoCommit(true); //restore autocommit

在java中运行许多sqlite语句

1 个答案: