Hibernate操作Blob，将Blob转换为String-白红宇

Hibernate操作Blob，将Blob转换为String

阅读量：374 次

发布时间：2019-03-05

本文共 764 字，大约阅读时间需要 2 分钟。


   
   
public String getScenicCoord(String pk) {
   
   
log.debug("根据景区唯一标示获取景区坐标!");
   
   
String sql = "select wkt from JQGEO where id = '" + pk + "'";
   
   
String result = "";
   
   
try {
   
Connection conn = getSession().connection();
   
   
PreparedStatement ps = conn.prepareStatement(sql);
   
   
ResultSet set = ps.executeQuery();
   
   
if (set.next()) {
   
Blob blob = set.getBlob(1);
   
   
InputStream in = blob.getBinaryStream();
   
   
int size = in.available();
   
   
byte[] by = new byte[size];
   
   
in.read(by);
   
   
result = new String(by);
   
   
} catch (Exception e) {
   
log.error("根据景区唯一标示获取景区坐标失败!");
   
   
result = null;
   
   
try {
   
throw e;
   
} catch (Exception e1) {
   
   
e1.printStackTrace();
   
   
result = null;
   
   
}
   
   
return result;