org.springframework.jdbc.UncategorizedSQLException: 
### Error updating database.  Cause: java.sql.SQLException: ORA-01461: 僅能繫結要插入 LONG 列的 LONG 值

### The error may involve com.extr.persistence.ExamPaperMapper.insertExamPaper-Inline
### The error occurred while setting parameters
### SQL: insert into et_exam_paper (id,name,content,duration,pass_point,total_point,status,summary,is_visible,answer_sheet,group_id,   is_subjective,creator,paper_type,field_id)   values   (?,   ?,   ?,   ?,   ?,   ?,   ?,   ?,   ?,   ?,   ?,   ?,   ?,   ?,   ?   )
 

### Cause: java.sql.SQLException: ORA-01461: 僅能繫結要插入 LONG 列的 LONG 值

protected Object content;

<resultMap id="myMapper" type="org.zz.ExamPaper">   
    <result property="id" column="id" jdbcType="VARCHAR"/>
    <result property="content" column="content" jdbcType="CLOB" javaType = "java.lang.String"
 
 typeHandler ="org.service.OracleClobTypeHandler"/>
    <result property="duration" column="duration" jdbcType="INTEGER"/>
    <result property="create_time" column="create_time" jdbcType="DATE" javaType="java.util.Date"/>
</resultMap>

import java.sql.CallableStatement;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

import oracle.sql.CLOB;

import org.apache.ibatis.type.JdbcType;
import org.apache.ibatis.type.TypeHandler;

public
 
 class OracleClobTypeHandler implements TypeHandler<Object> {

    public Object valueOf(String param) {
        return null;
    }

    @Override
    public Object getResult(ResultSet arg0, String arg1) throws SQLException {
        CLOB clob = (CLOB) arg0.getClob(arg1);
        return (clob == null || clob.length() == 0) ? null : clob.getSubString((long) 1, (int) clob.length());
    }

    @Override
    public Object getResult(ResultSet arg0, int arg1) throws SQLException {
        return null;
    }

    @Override
    public Object getResult(CallableStatement arg0, int arg1) throws SQLException {
        return null;
    }

    @Override
    public void setParameter(PreparedStatement arg0, int arg1, Object arg2, JdbcType arg3) throws SQLException {
        CLOB clob = CLOB.empty_lob();
        clob.setString(1, (String) arg2);
        arg0.setClob(arg1, clob);
    }
}