CLOB字段的插入 clob類型的數(shù)據(jù)直接insert可能會因為字符過長而出錯,所以要用對象形式插入.
示例:
首先,創(chuàng)建一個含CLOB字段的表:
create table test (id INTEGER, content clob);
然后插入空值
String strSql = “INSERT INTO TEST(id,content) values(‘0001’,?) ”;
con.setAutoCommit(false); //conn為Connection對象
//創(chuàng)建并實例化一個CLOB對象
CLOB clob = new CLOB((OracleConnection)con);
clob = oracle.sql.CLOB.createTemporary((OracleConnection)con,true,1);
//對CLOB對象賦值
clob.putString(1,formateSingleQuotes(Content));
OracleConnection OCon = (OracleConnection)con;
OraclePreparedStatement pstmt = (OraclePreparedStatement)OCon.prepareCall(strSql);
pstmt.setCLOB(1,clob);
int i = pstmt.executeUpdate();
pstmt.close();
OCon.commit();
OCon = null;
con = null;
Boolean flag = true;
if(i <=0)
{
flag = false;
}
if (flag == true)
{
out.print( "<script>alert('成功保存!'); </script>");
}
else
{
out.print( "<script>alert('保存數(shù)據(jù)時出錯,請檢查你輸入的數(shù)據(jù)格式是否符合要求');self.history.back ();</script>");
}
注意：
一定不要忘記引入包：import oracle.sql.*,oracle.jdbc.driver.*
2. CLOB類型的修改
對CLOB字段的修改除了sql語句外其他和插入相同
String strSql = “UPDATE TEST set content=? Where Id=’0001’ ”;
con.setAutoCommit(false); //conn為Connection對象
//創(chuàng)建并實例化一個CLOB對象
CLOB clob = new CLOB((OracleConnection)con);
clob = oracle.sql.CLOB.createTemporary((OracleConnection)con,true,1);
//對CLOB對象賦值
clob.putString(1,formateSingleQuotes(Content));
OracleConnection OCon = (OracleConnection)con;
OraclePreparedStatement pstmt = (OraclePreparedStatement)OCon.prepareCall(strSql);
pstmt.setCLOB(1,clob);
int i = pstmt.executeUpdate();
pstmt.close();
OCon.commit();
OCon = null;
con = null;
Boolean flag = true;
if(i <=0)
{
flag = false;
}
if (flag == true)
{
out.print( "<script>alert('成功保存!'); </script>");
}
else
{
out.print( "<script>alert('保存數(shù)據(jù)時出錯,請檢查你輸入的數(shù)據(jù)格式是否符合要求');self.history.back ();</script>");
}
posted on 2012-01-18 17:15
JavaBird 閱讀(10368)
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