自己的List的TypeHandler案例

package cn.***.api.mappers.handler;

import java.sql.CallableStatement;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;
import org.apache.ibatis.type.BaseTypeHandler;
import org.apache.ibatis.type.JdbcType;
import cn.***.api.model.WechatTemplate;
import oracle.jdbc.OracleConnection;
import oracle.sql.ARRAY;
import oracle.sql.ArrayDescriptor;
import oracle.sql.STRUCT;
import oracle.sql.StructDescriptor;

public class WechatTemplateArrayTypeHandler extends BaseTypeHandler {
    private final StringORA_OBJ_TYP="TYP_WECHAT_TEMPLATE";
    private final String ORA_TAB_TYP="TAB_WECHAT_TEMPLATE";

    @Override
    public void setNonNullParameter(PreparedStatement ps,int i, Object o, JdbcType jdbcType) throws SQLException {
        Connectionconn=null;
        try{
            if(null!=o) {
                @SuppressWarnings("unchecked")
                List list= (ArrayList)o;
                conn=ps.getConnection();
                if(conn.isWrapperFor(OracleConnection.class)) {
                    conn=conn.unwrap(OracleConnection.class);
                    ARRAY array= getArray(conn,ORA_OBJ_TYP,ORA_TAB_TYP,list);
                    ps.setArray(i,array);
                }
            }
        }catch(ClassNotFoundException e) {
            e.printStackTrace();
        }catch(Exception e) {
            e.printStackTrace();
        }
    }

    @Override
    public Object getNullableResult(ResultSet rs, String columnName)throws SQLException {
        return null;
    }

    @Override
    public Object getNullableResult(ResultSet rs,int columnIndex)throws SQLException {
        return null;
    }

    @Override
    public Object getNullableResult(CallableStatement cs,int columnIndex)throws SQLException {
        retur null;
    }

    private ARRAY getArray(Connection con, String OracleObj, String Oraclelist, List listData) throws Exception{
        ARRAY array=null;
        ArrayDescriptor desc= ArrayDescriptor.createDescriptor(Oraclelist,con);
        STRUCT[] structs=new STRUCT[listData.size()];
        if(list Data!=null&&listData.size() > 0) {
            StructDescriptor structdesc=new StructDescriptor(OracleObj,con);
            for(int i= 0;i < listData.size(); i++) {
                Object[] result= {
                    listData.get(i).getId(),
                    listData.get(i).getTemplateId(),
                    listData.get(i).getTitle(),
                    listData.get(i).getPrimaryIndustry(),
                    listData.get(i).getDeputyIndustry(),
                    listData.get(i).getParamNumber(),
                    listData.get(i).getContent(),
                    listData.get(i).getExample(),
                    listData.get(i).getStatus() 
                };
                structs[i] =new STRUCT(structdesc,con,result);
            }
            array=new ARRAY(desc,con,structs);
        }else{
            array=new ARRAY(desc,con,structs);
        }
        return array;
    }

}