mysql中插入语句返回自增长操作

String insertPurviewRoleSql = "insert into purview_role(model_sg, operation_sg, role_id) values(?, ?, ?)";//定义sql语句PreparedStatement pstatmInsertSystemPurview = conn.prepareStatement(insertSystemPurviewSql,PreparedStatement.RETURN_GENERATED_KEYS);//返回类型String insertPurviewRole