Spring Boot 学习9--使用JdbcTemplate

<!--数据持久化组件-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>

@Autowired
@Qualifier("pmapiJdbcTemplate")//指定需要装配的JdbcTemplate,也可以使用@Resource
private JdbcTemplate jdbcTemplate;

//获取表字段属性
String sql = String.format("select a.TABLE_NAME,a.COLUMN_NAME,a.DATA_TYPE,a.DATA_LENGTH,b.COMMENTS ,a.NULLABLE"
+ " from ALL_TAB_COLUMNS a JOIN ALL_COL_COMMENTS b ON a.TABLE_NAME = b.TABLE_NAME AND a.COLUMN_NAME = b.COLUMN_NAME "
+ " AND a.OWNER=b.OWNER "
+ " where a.TABLE_NAME = '%s' ", tableName.trim());
List<Map<String, Object>> mapList = jdbcTemplate.queryForList(sql);//使用Oracle系统视图获取表的各属性描述等
Iterator it = mapList.iterator();
while (it.hasNext()) {
Map dmMap = (Map) it.next();
Object fieldName = dmMap.get("COLUMN_NAME");
if (fieldName != null) {
Object fieldComment = dmMap.get("COMMENTS");
Object notNull = dmMap.get("NULLABLE");
}
}