查询表字段类型

/*
* 根据表明查询字段类型
* */
private Map<String, Integer> queryFieldMap(String tableName, String dbName){
if(tableName == null || dbName == null){
return null;
}

Map<String, Integer> resultMap = new HashMap<String, Integer>();

Connection conn = null;
Statement stat = null;
ResultSet rs = null;


try {
conn = ConnectionPool.getInstance().getConnection(dbName);
stat = conn.createStatement();
rs = stat.executeQuery("select * from " + tableName + " where 1 = 0");
ResultSetMetaData rsmd = rs.getMetaData();
int count = rsmd.getColumnCount();
for(int index = 1; index <= count; index++){
String colName = rsmd.getColumnName(index).toLowerCase();
int colType = rsmd.getColumnType(index);

resultMap.put(colName, colType);
}
} catch (SQLException e) {
log.error(e.getMessage());
e.printStackTrace();
resultMap = null;
} finally {
try { rs.close(); } catch (Exception e) { e.printStackTrace(); }
try { stat.close(); } catch (Exception e) { e.printStackTrace(); }
try { conn.close(); } catch (Exception e) { e.printStackTrace(); }
}

return resultMap;

}

2.引用的地方：

fieldType = fieldTypeMap.get(fieldName.toLowerCase());

if(fieldType == java.sql.Types.VARCHAR){//String
PreStatSetValue.setString(pstmt, index + 1, fieldValue);
} else if(fieldType == java.sql.Types.INTEGER || fieldType == java.sql.Types.NUMERIC || fieldType == java.sql.Types.SMALLINT){//int
try{
PreStatSetValue.setInt(pstmt, index + 1, Integer.parseInt(fieldValue));
}catch(Exception e){
log.error("更新cssf_ts_statistics， 字段值设置错误：fieldName = " + fieldName + ", 要求类型：" + fieldType + ", 设置值：" + fieldValue);
PreStatSetValue.setInt(pstmt, index + 1, 0);
}

} else if(fieldType == java.sql.Types.DATE || fieldType == java.sql.Types.TIMESTAMP){//date
PreStatSetValue.setTimestamp(pstmt, index + 1, fieldValue);
}