Package Oracle.clob;Import Java.io.BufferedReader;
Import Java.io.File;
Import Java.io.FileReader;
Import java.io.IOException;
Import Java.io.Reader;
Import Java.io.StringReader;
Import java.sql.Connection;
Import Java.sql.DriverManager;
Import java.sql.PreparedStatement;
Import Java.sql.ResultSet;
Import java.sql.SQLException;
Import Oracle.jdbc.driver.OracleDriver;
Import Oracle.sql.CLOB;
public class Clobtest {
String url = "JDBC:ORACLE:THIN:@192.168.2.157:1521:ORCL";
String user = "XJ";
String pwd = "XJ";
String Text = "This is the data to be inserted into the CLOB";
private void Clobimport () throws ClassNotFoundException, SQLException {
TODO auto-generated Method Stub
Drivermanager.registerdriver (New Oracledriver ());
Connection conn = drivermanager.getconnection (URL, user, pwd);//Get Connection object
String sql = "INSERT into Clob_test (ID,STR) VALUES (' 1 ',?)"; /SQL statement to execute
PreparedStatement stmt = conn.preparestatement (sql);//Load SQL statements
PreparedStatement support SQL with question mark? , can be dynamically replaced? The content.
Reader Clobreader = new StringReader (text); Turn text into a stream form
Stmt.setcharacterstream (1, Clobreader, Text.length ());//Replace in SQL statement?
int num = Stmt.executeupdate ();//Execute SQL
if (num > 0) {
System.out.println ("OK");
} else {
System.out.println ("NO");
}
Stmt.close ();
Conn.close ();
}
private void Clobexport () throws ClassNotFoundException, SQLException,
IOException {
TODO auto-generated Method Stub
CLOB CLOB = null;
String sql = "SELECT * from Clob_test where id=1";
Drivermanager.registerdriver (New Oracledriver ());
Connection conn = drivermanager.getconnection (URL, user, pwd);//Get Connection object
PreparedStatement stmt = conn.preparestatement (sql);
ResultSet rs = Stmt.executequery ();
String id = "";
String content = "";
if (Rs.next ()) {
id = rs.getstring ("id");//Get ID
CLOB = (Oracle.sql.CLOB) rs.getclob ("str"); Get CLOB Field str
Note: The data is not available with rs.getstring ("str") and NULL is returned;
Content = clobtostring (CLOB);
}
Stmt.close ();
Conn.close ();
Output results
SYSTEM.OUT.PRINTLN (ID);
SYSTEM.OUT.PRINTLN (content);
}
//Convert Word CLOB to String type
Public String clobtostring (CLOB CLOB) throws SQLException, IOException {
String restring = "";
Reader is = Clob.getcharacterstream ();//Get Stream
bufferedreader br = new BufferedReader (is);
String s = br.readline ();
StringBuffer sb = new StringBuffer ();
While (s! = null) {//execution loop takes all strings out of the value to StringBuffer from StringBuffer to string
Sb.append (s);
s = br.readline ();
}
restring = Sb.tostring ();
return restring;
}
TODO auto-generated Method Stub
public static void Main (string[] args) throws IOException,
ClassNotFoundException, SQLException {
TODO auto-generated Method Stub
Clobtest clobtest = new Clobtest ();
Read file
FileReader _frd = new FileReader (New File ("D:\\dos.txt"));
BufferedReader _BRD = new BufferedReader (_FRD);
String _rs = _brd.readline ();
StringBuffer _input = new StringBuffer ();
while (_rs! = null) {
_input.append (_RS);
_rs = _brd.readline ();
}
System.out.println (_input.tostring ());
Input test
Clobtest.text = _input.tostring ();
Clobtest.clobimport ();
Output test
Clobtest.clobexport ();
}
}
A practical way to store and read Oracle CLOB type fields in Java
