如何使用java读取从存储过程返回的类型的ARRAY？ [英] How to read a ARRAY of types returned from a stored proc using java?
问题描述
这是在以下位置发布的问题的延续：
Java程序将Bean的List传递给oracle存储过程 - 一次传递整个列表而不是一个接一个地附加对象
This is a continuation of the question posted under the following location: Java program to pass List of Bean to a oracle stored procedure - Pass entire list at one shot rather than appending objects one after the other
我一直在尝试增强上面链接位置中提到的存储过程，并且在实现中感到困惑。而不是VARCHAR2作为过程的输出，我现在想要返回NUM_ARRAY作为过程的输出。你能帮我实现逻辑来读取我的java代码中的NUM_ARRAY吗？通常使用Map out = super.execute（inParams）返回输出;我现在如何将NUM_ARRAY提取到我的bean？
I have been trying to enhance the stored procedure mentioned in the above link location and am confused in the implementation. Rather than VARCHAR2 as a output from the procedure i now want to return NUM_ARRAY as the output from the procedure. Can you please help me in implementing the logic to read the NUM_ARRAY in my java code. Normally output is returned using Map out = super.execute(inParams); How can i now extract the NUM_ARRAY to my bean?
The source code implementation is as follows.
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.util.HashMap;
import java.util.Map;
import javax.sql.DataSource;
import oracle.jdbc.OracleTypes;
import oracle.sql.ARRAY;
import oracle.sql.ArrayDescriptor;
import org.apache.log4j.Logger;
import org.springframework.jdbc.core.SqlOutParameter;
import org.springframework.jdbc.core.SqlParameter;
import org.springframework.jdbc.core.SqlTypeValue;
import org.springframework.jdbc.object.StoredProcedure;
public class RevPrdBrkDwnSP extends StoredProcedure{
private final Logger log = Logger.getLogger(this.getClass().getName());
public RevPrdBrkDwnSP(DataSource dataSource, String storeProcName) {
// Run the Parent
super(dataSource, storeProcName);
// Declare the Parameter Details
declareParameter(new SqlParameter("IN_ARRAY", OracleTypes.ARRAY, "****.PROD_PRCT_BRKDWN_TYPE_ARRAY"));
declareParameter(new SqlOutParameter("OUT_ARRAY", OracleTypes.ARRAY, "****.PROD_PRCT_BRKDWN_TYPE_ARRAY"));
// Compile the SP
compile();
}
public boolean execute(final RevAppViewBean appViewBean$Session, final DataSource dataSource) throws Exception {
boolean returnVal = false;
Map<String, Object> inParams = new HashMap<String, Object>();
log.info("Setting up the Store Procedure Params");
inParams.put("IN_ARRAY", new SqlTypeValue() {
public void setTypeValue(PreparedStatement cs, int index, int sqlType, String typeName) throws SQLException {
Connection con = cs.getConnection();
ArrayDescriptor des = ArrayDescriptor.createDescriptor("****.PROD_PRCT_BRKDWN_TYPE_ARRAY", con);
ARRAY a = new ARRAY(des, con, appViewBean$Session.getExcelRecLst().toArray());
cs.setObject(1, (Object)a);
}
});
inParams.put("OUT_ARRAY", identifier); // what should the identifier be ?????????
if (log.isDebugEnabled()) {
log.debug("Executing the **** Store Procedure ");
}
Map out = super.execute(inParams); // how to get the same array as value ??????
log.info("output size is --------------------->>>>>>>>>> "+out.size());
for(Object o : out.keySet()){
log.info((String)out.get(o));
returnVal = Boolean.parseBoolean((String)out.get(o));
}
if (log.isDebugEnabled()) {
log.info("Output from **** Store Procedure :" + out);
}
return returnVal;
}
}
更新：
在使用Spring Data JDBC Extension之后，必须更改源代码以适应下面粘贴的新响应，但是在调用bean.getAttributes（）方法时仍然存在连接问题。看起来需要找到一种方法来关闭连接或在连接关闭之前访问值。
Update: After making use of the Spring Data JDBC Extension the source code had to be changed to accommodate the the new response which is pasted below, but the problem of connection still exists when the bean.getAttributes() method is called. Looks like a way needs to be found to not close the connection or access the values before the connection gets closed.
Map out = super.execute(inParams);
log.info("output size is --------------------->>>>>>>>>> "+out.size()); //prints the actual value
Object[] idOutArraz = (Object[])out.get("OUT_ARRAY");
log.info("size of returnValue is "+idOutArraz.length); //prints the right number of results
for(int i= 0; i<idOutArraz.length;i++){
Object[] attrs = null;
Struct bean = (Struct) idOutArraz[i];
attrs = bean.getAttributes();
if (attrs != null) {
System.out.println(Arrays.asList(attrs));
}
}
推荐答案
经过多次试验和不同方法的错误后回答。
尝试实现很多解决方案之后，Callable语句对我有用。看起来像是一种解决方法，但欢迎解决实际实施的任何解决方案。
Answered after lot many trial and errors with different approaches. After trying to implement lot many solutions the Callable statement worked for me. Looks like a workaround, but any solution to resolve the actual implementation is welcome.
请在下面找到实施的工作副本。
Please find below the working copy of the implementation.
import java.math.BigDecimal;
import java.sql.Array;
import java.sql.CallableStatement;
import java.sql.Connection;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;
import javax.sql.DataSource;
import oracle.jdbc.OracleTypes;
import oracle.sql.ARRAY;
import oracle.sql.ArrayDescriptor;
import oracle.sql.STRUCT;
import org.apache.log4j.Logger;
import org.springframework.jdbc.core.SqlOutParameter;
import org.springframework.jdbc.core.SqlParameter;
import org.springframework.jdbc.object.StoredProcedure;
import com.****.****.****.ExcelListenerBean;
import com.****.****.****.RevAppViewBean;
public class RevPrdBrkDwnSP extends StoredProcedure{
private final Logger log = Logger.getLogger(this.getClass().getName());
private Connection con = null;
private DataSource ds = null;
public RevPrdBrkDwnSP(DataSource dataSource, String storeProcName) throws SQLException {
// Run the Parent
super(dataSource, storeProcName);
con = dataSource.getConnection();
ds = dataSource;
if (log.isInfoEnabled()) {
log.info("Stored Procedure Name : "+ storeProcName);
}
// Declare the Parameter Details
declareParameter(new SqlParameter("IN_ARRAY", OracleTypes.ARRAY, "****.PROD_PRCT_BRKDWN_TYPE_ARRAY"));
declareParameter(new SqlOutParameter("OUT_ARRAY", OracleTypes.ARRAY, "****.PROD_PRCT_BRKDWN_TYPE_ARRAY"));
// Compile the SP
compile();
}
public List<ExcelListenerBean> execute(final RevAppViewBean appViewBean$Session, DataSource dataSource) throws Exception {
dataSource = ds;
List<ExcelListenerBean> beans = new ArrayList<ExcelListenerBean>();
log.info("Setting up the Store Procedure Params");
String getDBUSERByUserIdSql = "{call ****.PRCS_PROD_PRCT_BRKDWN_ENTRIES(?,?)}";
CallableStatement cs = con.prepareCall(getDBUSERByUserIdSql);
ArrayDescriptor des = ArrayDescriptor.createDescriptor("PBAREV.PROD_PRCT_BRKDWN_TYPE_ARRAY", con);
ARRAY a = new ARRAY(des, con, appViewBean$Session.getExcelRecLst().toArray());
cs.setObject(1, (Object)a);
cs.registerOutParameter(2, OracleTypes.ARRAY, "****.PROD_PRCT_BRKDWN_TYPE_ARRAY");
if (log.isDebugEnabled()) {
log.debug("Executing the PBAREV Store Procedure ");
}
cs.execute();
log.info("Executed ****.PRCS_PROD_PRCT_BRKDWN_ENTRIES... Processing values to beans");
Array arr = cs.getArray(2);
Object[] objArr = (Object[]) arr.getArray();
for(int i=0; i<objArr.length;i++){
STRUCT st = (STRUCT)objArr[i];
ExcelListenerBean bean = new ExcelListenerBean();
Object[] obj = st.getAttributes();
bean.setPrntGdwIdN(((BigDecimal)obj[1]).longValue());
bean.setChldGdwIdN(((BigDecimal)obj[2]).longValue());
bean.setChldAsetPrcntN(Double.valueOf(String.valueOf(obj[4])));
bean.setStatus(String.valueOf(obj[8]));
bean.setStatusMessage(String.valueOf(obj[9]));
beans.add(bean);
}
if (log.isDebugEnabled()) {
log.info("Finised processing SP output values to ExcelListenerBeans");
}
return beans;
}
}
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