我想從數據類型爲clob的表中選擇數據。 所以resut就像[email protected] 我想顯示數據爲字符串,因爲它們出現在表中。如何使用Groovy將clob轉換爲字符串?
在常規我想這:
rowTest = sql.firstRow("select name from table where id=10")
clobTest = (oracle.sql.CLOB)rowTest[0]
byte_stream_test = clobTest.getBinaryStream()
if(byte_stream_test == null) { println "Test: Received null stream!" }
byte[] byte_array_test = new byte[10]
int bytes_read_test = byte_stream_test.read(byte_array_test)
print "Read $bytes_read_test bytes from the clob!"
sql.connection.close()
我有以下錯誤:
---- A working test of writing and then reading a blob into an Oracle DB ---
Exception in thread "main" groovy.lang.MissingMethodException: No signature of method: oracle.sql.CLOB.getBinaryStream() is applicable for argument types:() values: []
at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.unwrap(ScriptBytecodeAdapter.java:56)
at org.codehaus.groovy.runtime.callsite.PojoMetaClassSite.call(PojoMetaClassSite.java:46)
at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:45)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:108)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:112)
at Test2.run(Test2.groovy:10)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:90)
at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:324)
at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1207)
at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1016)
at org.codehaus.groovy.runtime.InvokerHelper.invokePogoMethod(InvokerHelper.java:901)
at org.codehaus.groovy.runtime.InvokerHelper.invokeMethod(InvokerHelper.java:884)
at org.codehaus.groovy.runtime.InvokerHelper.runScript(InvokerHelper.java:406)
at org.codehaus.groovy.runtime.InvokerHelper$runScript.call(Unknown Source)
at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:45)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:108)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:120)
at Test2.main(Test2.groovy)
你能幫我解決這個問題,謝謝
你試過看JavaDaoc爲CLOB http://download.oracle.com/otn_hosted_doc/jdeveloper/905/jdbc-javadoc/oracle/sql/ CLOB.html? – 2014-11-21 23:15:40