用java调用oracle存储过程总结

    技术2022-05-19  23

    用java调用oracle存储过程总结 一:无返回值的存储过程 存储过程为: CREATE OR REPLACE PROCEDURE TESTA(PARA1 IN VARCHAR2,PARA2 IN VARCHAR2)  AS BEGIN    INSERT INTO HYQ.B_ID (I_ID,I_NAME) VALUES (PARA1, PARA2); END TESTA; 然后呢,在java里调用时就用下面的代码: package com.hyq.src; import java.sql.*; import java.sql.ResultSet; public class TestProcedureOne {   public TestProcedureOne() {   }   public static void main(String[] args ){     String driver = "oracle.jdbc.driver.OracleDriver";     String strUrl = "jdbc:oracle:thin:@127.0.0.1:1521: hyq ";     Statement stmt = null;     ResultSet rs = null;     Connection conn = null;     CallableStatement cstmt = null;     try {       Class.forName(driver);       conn =  DriverManager.getConnection(strUrl, " hyq ", " hyq ");       CallableStatement proc = null;       proc = conn.prepareCall("{ call HYQ.TESTA(?,?) }");       proc.setString(1, "100");       proc.setString(2, "TestOne");       proc.execute();     }     catch (SQLException ex2) {       ex2.printStackTrace();     }     catch (Exception ex2) {       ex2.printStackTrace();     }     finally{       try {         if(rs != null){           rs.close();           if(stmt!=null){             stmt.close();           }           if(conn!=null){             conn.close();           }         }       }       catch (SQLException ex1) {       }     }   } } 当然了,这就先要求要建张表TESTTB,里面两个字段(I_ID,I_NAME)。 二:有返回值的存储过程(非列表) 存储过程为: CREATE OR REPLACE PROCEDURE TESTB(PARA1 IN VARCHAR2,PARA2 OUT VARCHAR2)  AS BEGIN    SELECT INTO PARA2 FROM TESTTB WHERE I_ID= PARA1; END TESTB; 在java里调用时就用下面的代码: package com.hyq.src; public class TestProcedureTWO {   public TestProcedureTWO() {   }   public static void main(String[] args ){     String driver = "oracle.jdbc.driver.OracleDriver";     String strUrl = "jdbc:oracle:thin:@127.0.0.1:1521:hyq";     Statement stmt = null;     ResultSet rs = null;     Connection conn = null;     try {       Class.forName(driver);       conn =  DriverManager.getConnection(strUrl, " hyq ", " hyq ");       CallableStatement proc = null;       proc = conn.prepareCall("{ call HYQ.TESTB(?,?) }");       proc.setString(1, "100");       proc.registerOutParameter(2, Types.VARCHAR);       proc.execute();       String testPrint = proc.getString(2);       System.out.println("=testPrint=is="+testPrint);     }     catch (SQLException ex2) {       ex2.printStackTrace();     }     catch (Exception ex2) {       ex2.printStackTrace();     }     finally{       try {         if(rs != null){           rs.close();           if(stmt!=null){             stmt.close();           }           if(conn!=null){             conn.close();           }         }       }       catch (SQLException ex1) {       }     }   } } } 注意,这里的proc.getString(2)中的数值2并非任意的,而是和存储过程中的out列对应的,如果out是在第一个位置,那就是proc.getString(1),如果是第三个位置,就是proc.getString(3),当然也可以同时有多个返回值,那就是再多加几个out参数了。 三:返回列表 由于oracle存储过程没有返回值,它的所有返回值都是通过out参数来替代的,列表同样也不例外,但由于是集合,所以不能用一般的参数,必须要用pagkage了.所以要分两部分, 1,  建一个程序包。如下: CREATE OR REPLACE PACKAGE TESTPACKAGE  AS TYPE Test_CURSOR IS REF CURSOR; end TESTPACKAGE; 2,建立存储过程,存储过程为: CREATE OR REPLACE PROCEDURE TESTC(p_CURSOR out TESTPACKAGE.Test_CURSOR) IS BEGIN     OPEN p_CURSOR FOR SELECT * FROM HYQ.TESTTB; END TESTC; 可以看到,它是把游标(可以理解为一个指针),作为一个out 参数来返回值的。 在java里调用时就用下面的代码: package com.hyq.src; import java.sql.*; import java.io.OutputStream; import java.io.Writer; import java.sql.PreparedStatement; import java.sql.ResultSet; import oracle.jdbc.driver.*; public class TestProcedureTHREE {   public TestProcedureTHREE() {   }   public static void main(String[] args ){     String driver = "oracle.jdbc.driver.OracleDriver";     String strUrl = "jdbc:oracle:thin:@127.0.0.1:1521:hyq";     Statement stmt = null;     ResultSet rs = null;     Connection conn = null;     try {       Class.forName(driver);       conn =  DriverManager.getConnection(strUrl, "hyq", "hyq");       CallableStatement proc = null;       proc = conn.prepareCall("{ call hyq.testc(?) }");       proc.registerOutParameter(1,oracle.jdbc.OracleTypes.CURSOR);       proc.execute();       rs = (ResultSet)proc.getObject(1);       while(rs.next())       {           System.out.println("<tr><td>" + rs.getString(1) + "</td><td>"+rs.getString(2)+"</td></tr>");       }     }     catch (SQLException ex2) {       ex2.printStackTrace();     }     catch (Exception ex2) {       ex2.printStackTrace();     }     finally{       try {         if(rs != null){           rs.close();           if(stmt!=null){             stmt.close();           }           if(conn!=null){             conn.close();           }         }       }       catch (SQLException ex1) {       }     }   } } 在这里要注意,在执行前一定要先把oracle的驱动包放到class路径里,否则会报错的。 <sql-query name="allstudent" callable="true">        <return  alias="stu" class="pojo.Student">            <return-property name="id" column="ID"/>            <return-property name="name" column="NAME"/>        </return>        {?=call allstudent()}     </sql-query> 


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