Question

java代码怎么调用存储过程

Answer 1

方法如下：importjava.sql.Connection;importjava.sql.DriverManager;importjava.sql.ResultSet;importjava.sql.SQLException;importjava.sql.Statement;/***LoadJDBCDriver*最基本的方法通过JDBC连接数据库*@authorJacob**/publicclassLoadByPrimary{publicstaticvoidmain(String[]args)throwsClassNotFoundException{Stringdriver="oracle.jdbc.OracleDriver";Connectioncn=null;/***Class.forName手动加载一个类到方法区，Driver类中包含自动注册驱动的静态代码块*会自动在DriverManager中注册驱动*/Class.forName(driver);Stringurl="jdbc:oracle:thin:@localhost:1521:ORACLE";//1521代表端口号，默认的Stringuser="用户名";Stringpwd="密码";try{/**Connection是接口，返回值是一个引用对象，是Oracle驱动提供实现类ojdbc7.jar*使用JDBCAPI接口，实际上是驱动实现类*/cn=DriverManager.getConnection(url,user,pwd);Statementstmt=cn.createStatement();Stringsql="SELECT*FROMstu_empWHEREdeptno=10";ResultSetrs=stmt.executeQuery(sql);while(rs.next()){System.out.println(rs.getInt("empno")+""+rs.getString("ename")+""+rs.getString("job"));}rs.close();stmt.close();}catch(SQLExceptione){e.printStackTrace();}finally{try{if(cn!=null){cn.close();}}catch(SQLExceptione2){e2.printStackTrace();}}}}这是通过preparedstatement实现更新数据，这里我把连接数据库的方法进行了封装，每次直接调用了。publicstaticvoidmain(String[]args){PreparedStatementDemopsd=newPreparedStatementDemo();psd.updateSalary("JACOB",3000);psd.selectSalary("JACOB");}publicvoidupdateSalary(Stringename,doublesal){Stringsql="Updatestu_empsetsal=?Whereename=?";Connectioncn=null;PreparedStatementps=null;try{cn=DBPUtil.getConnection();ps=cn.prepareStatement(sql);ps.setDouble(1,sal);ps.setString(2,ename);intnum=ps.executeUpdate();System.out.println("提示：总共有"+num+"条数据已经更新！");}catch(SQLExceptione){e.printStackTrace();}finally{DBUtil.stmtClose(ps);DBUtil.connClose(cn);}}publicvoidselectSalary(Stringname){Stringsql="Select*Fromstu_empWhereename=?";Connectioncn=null;PreparedStatementps=null;ResultSetrs=null;try{cn=DBPUtil.getConnection();ps=cn.prepareStatement(sql);ps.setString(1,name);rs=ps.executeQuery();while(rs.next()){System.out.println(rs.getString("ename")+"的工资是："+rs.getInt("sal"));}}catch(SQLExceptione){e.printStackTrace();}finally{DBUtil.stmtClose(ps);DBUtil.rsClose(rs);DBUtil.connClose(cn);}}}