java读取oracle中Clob和Blob
//读取clob字段
public static String readCLOB() {
String sql = "select nr from table1 where id='1'";
String content = "";
try {
PreparedStatement ps1 = connection.prepareStatement(sql);
ResultSet rs1 = ps1.executeQuery();
while (rs1.next()) {
oracle.sql.CLOB clob = (oracle.sql.CLOB) rs1.getClob("1");
BufferedReader in = new BufferedReader(clob.getCharacterStream());
StringWriter out = new StringWriter();
int c;
while ((c = in.read()) != -1) {
out.write(c);
}
content = out.toString();// CLOB内容
}
} catch (Exception e) {
e.printStackTrace();
}
return content;
}
//读取blob字段
public static String readBLOB() {
String sql = "select nr from table1 where id='1'";
String content = "";
try {
PreparedStatement ps1 = connection.prepareStatement(sql);
ResultSet rs1 = ps1.executeQuery();
while (rs1.next()) {
oracle.sql.BLOB blob = (oracle.sql.BLOB) rs1.getBlob("1");
OutputStream out = blob.getBinaryOutputStream();
byte[] b = new byte[(int)blob.length];
content = out.write(b);
out.flush();
out.close();
}
} catch (Exception e) {
e.printStackTrace();
}
return content;
}