这个问题与我原来的问题相关How to return an array from Java to PL/SQL ?,但更具体。
我一直在阅读 Oracle 数据库 JDBC 开发人员指南 和
但我仍然无法编写可以使用
创建 ARRAY 的最少代码ARRAY array = oracle.jdbc.OracleConnection.createARRAY(sql_type_name, elements);
按照创建 ARRAY 对象中的说明。
我正在使用 Oracle 数据库 JVM。
我尝试过以下方法:
示例1
create or replace type widgets_t is table of varchar2(32767);
/
create or replace and compile java source named "so20j1" as
public class so20j1 {
public void f1() {
String[] elements = new String[]{"foo", "bar", "zoo"};
oracle.sql.ARRAY widgets =
oracle.jdbc.OracleConnection.createARRAY("widgets_t", elements);
}
};
/
show errors java source "so20j1"
失败:
Errors for JAVA SOURCE "so20j1":
LINE/COL ERROR
-------- -----------------------------------------------------------------
0/0 so20j1:4: non-static method
createARRAY(java.lang.String,java.lang.Object) cannot be
referenced from a static context
0/0 1 error
0/0 ^
0/0 oracle.sql.ARRAY widgets =
oracle.jdbc.OracleConnection.createARRAY("widgets_t", elements);
示例2
create or replace type widgets_t is table of varchar2(32767);
/
create or replace and compile java source named "so20j2" as
public class so20j2 {
public void f1() {
String[] elements = new String[]{"foo", "bar", "zoo"};
oracle.jdbc.OracleDriver ora = new oracle.jdbc.OracleDriver();
java.sql.Connection conn = ora.defaultConnection();
oracle.sql.ARRAY widgets = conn.createARRAY("widgets_t", elements);
}
};
/
show errors java source "so20j2"
失败:
Errors for JAVA SOURCE "so20j2":
LINE/COL ERROR
-------- -----------------------------------------------------------------
0/0 so20j2:6: cannot find symbol
0/0 symbol : method createARRAY(java.lang.String,java.lang.String[])
0/0 1 error
0/0 oracle.sql.ARRAY widgets = conn.createARRAY("widgets_t",
elements);
0/0 ^
0/0 location: interface java.sql.Connection
免责声明:我还不是 Java 程序员。
您的方法#2 是正确的,但是您无法从 java.sql.Connection 类型的连接创建 oracle 数组。 它必须是 OracleConnection 才能使用这些方法。
oracle.jdbc.OracleDriver ora = new oracle.jdbc.OracleDriver();
java.sql.Connection conn = ora.defaultConnection();
OracleConnection oraConn = conn.unwrap(OracleConnection.class);
oracle.sql.ARRAY widgets = oraConn.createARRAY("widgets_t", elements);
这是一个使用 Oracle 19 测试的工作示例:
final BigDecimal[] plainJavaArray = new BigDecimal[]{BigDecimal.valueOf(1L), BigDecimal.valueOf(2L)};
final oracle.jdbc.OracleConnection oracleConnection = (oracle.jdbc.OracleConnection) jdbcConnection;
final java.sql.Array array = oracleConnection.createOracleArray("SYS.ODCINUMBERLIST", plainJavaArray);
记住一些非常重要的方面:
SYS.ODCIVARCHAR2LIST
或SYS.FI_CATEGORICALS
代替VARCHAR2
,SYS.ODCIDATELIST
代替DATE
等。SYS.ODCIGRANULELIST
比SYS.ODCINUMBERLIST
大两倍,如果还不够,请使用SYS.FI_NUMERICALS
。您也可以使用用户定义的类型,CREATE TYPE ARRAY_OF_THING IS TABLE OF THING
有效。根据 Affe 和 Chris Mazzola 的回答,我成功构建了两个在 Oracle 11g R2 数据库中编译的示例。
基于Affe答案的示例
create or replace type widgets_t is table of varchar2(32767);
/
create or replace and compile java source named "so20ja1" as
public class so20ja1 {
public void f1() throws java.sql.SQLException {
String[] elements = new String[]{"foo", "bar", "zoo"};
oracle.jdbc.OracleDriver ora = new oracle.jdbc.OracleDriver();
java.sql.Connection conn = ora.defaultConnection();
oracle.jdbc.OracleConnection oraConn = (oracle.jdbc.OracleConnection)conn;
java.sql.Array widgets = oraConn.createARRAY("widgets_t", elements);
}
};
/
show errors java source "so20ja1"
基于 Chris Mazzola 的回答的示例
create or replace type widgets_t is table of varchar2(32767);
/
create or replace and compile java source named "so20ja2" as
public class so20ja2 {
public void f1() throws java.sql.SQLException {
String[] elements = new String[]{"foo", "bar", "zoo"};
oracle.jdbc.OracleDriver ora = new oracle.jdbc.OracleDriver();
java.sql.Connection conn = ora.defaultConnection();
oracle.sql.ArrayDescriptor desc =
oracle.sql.ArrayDescriptor.createDescriptor("widgets_t", conn);
java.sql.Array widgets = new oracle.sql.ARRAY(desc, conn, elements);
}
};
/
show errors java source "so20ja2"
// array sample (using a stored procedure to sum two or more numbers)
Connection connection = dataSource.getConnection(username,password);
ArrayDescriptor desc =
ArrayDescriptor.createDescriptor(schemaName + "." + arrayType, connection);
// first ? is the array, second ? is the result via out parameter
String sql = "call sum_numbers(?,?)";
CallableStatement cs = connection.prepareCall(sql);
String[] args = {"5","15","25","35"}; // what to sum
Array array = new oracle.sql.ARRAY(desc, connection, args);
cs.setArray(1, array);
cs.registerOutParameter(2, Types.INTEGER);
cs.execute();
int result = cs.getInt(2);
cs.close();
connection.createArrayOf(..)
,这是标准的。
Oracle 12.2版本:
oracle.jdbc.OracleArray v_arr ;
String[] v_list ;
v_arr = ((oracle.jdbc.OracleConnection)DriverManager.getConnection("jdbc:default:connection:")).createARRAY ( "T_STRING_ARRAY" , v_list ) ;
Map<String, Object> params = new HashMap<>();
params.put("input_to_sp", new ExampleArrayMapper (new String[] { "ABC" }));
Map<String, Object> results = spObject.execute(params);
final List<Object> output = (List<Object>) results.get("po_out_cur");
public class ExampleArrayMapper extends AbstractSqlTypeValue {
private String[] customObject;
public ExampleArrayMapper (String[] customObject) {
this.customObject= customObject;
}
public String getSQlTypeName() throws SQLException {
return "NAME_OF_TYPE_IN_SQL";
}
@Override
protected Object createTypeValue(Connection con, int sqlType, String typeName) throws SQLException {
try {
con = dataSource.getConnection().unwrap(OracleConnection.class);
Array reportsArray = ((OracleConnection) con).createOracleArray(SQL_TYPE_NAME, customObject);
return reportsArray;
} finally {
con.close();
}
}
}