Oracle插入大量文字

 使用PreparedStatement的setString(i, s)時出現:

可以參考文章:http://community.csdn.net/Expert/topic/3936/3936672.xml?temp=.2879145

 java.sql.SQLException: 資料大小超出此類型的最大值: 3000

後面那個值大小不定,  感覺與s大小有關

表結構

create table test(

name char(32),

addr   varchar(3000)                       //varchar2也一樣

)

解決辦法: 採用setCharacterStream

import java.sql.*;
import java.io.*;
import java.util.*;

/**
 * oracle測試
 * @author kingfish
 * @version 1.0
 */
public class TestOra {
  public static void testORACLE() {
    String url = "jdbc:oracle:thin:@localhost:1521:oradb";
    String username = "system";
    String password = "manager";

    Connection conn = null;
    try {
      Class.forName("oracle.jdbc.driver.OracleDriver");
      conn = DriverManager.getConnection(url, username, password);
    }
    catch (Exception e) {
      e.printStackTrace();
      return;
    }

    char[] carray = new char[1000];
    Arrays.fill(carray, '我');
    String s = new String(carray);
    try {
      PreparedStatement pst = conn.prepareStatement(
          "insert into test(name,addr) values(?,?)");
      pst.setString(1, "kingfish");

      pst.setCharacterStream(2,
                             new InputStreamReader(new ByteArrayInputStream(s.
          getBytes())), s.length());

      //pst.setString(2,s);  //用此句則異常
      pst.execute();

      Statement st = conn.createStatement();
      ResultSet r = st.executeQuery("SELECT * from test");

      while (r.next()) {
        s = r.getString(2);
        System.out.println("len=" + s.length());
        System.out.println("value=" + s);
      }

      r.close();
      st.close();
      conn.close();
    }
    catch (Exception e) {
      e.printStackTrace();
    }
  }

  /**
   * 測試
   * @param args String[]
   */
  public static void main(String[] args) {
    testORACLE();
  }
}

說明: 引起此問題的原因估計和OraclePreparedStatement中的setString的實現有關.

kingfish

2005.4.14

本文引用地址： http://blog.csdn.net/kingfish/services/trackbacks/348062.aspx