springboot+datajpa+sqlserver报Caused by: invalid stream header: 77327070是什么情况如何解决？
刚接触springboot+jpa的小白，拜求各路大神的帮忙：
开发工具是eclipse:
没写controller层，先用junit测试crud(即增删改查)中其中的修改和删除，不能用，代码如下：
实体编译好后
1.首先JpaRepository层用的完全是继承JpaRepository的借口自带方法，出查询外没用自定义任何修改：
@Repository
@Transactional
public interface sd extends JpaRepository{
Page findAll(Pageable pageable);
}
```2.service 层是：
@Override
@Modifying
@Transactional
public void delete(String pid) {
// TODO Auto-generated method stub
cd.deleteById(pid);
}
@Override
public boolean update(sd sf) {
// TODO Auto-generated method stub
cd.save(cfb);
return true;
}
3.测试类中：
@Test
@Modifying
@Transactional
public void deletepro() {
cps.delete("fef232");
}
@Test
public void querypro() {
/* int page=1,size=10;
Sort sort = new Sort(Direction.DESC, "pid");
Pageable pageable = new PageRequest(page, size, sort);
System.out.println(cps.findByPages(pageable));*/
}
``4.具体报错为：
org.hibernate.type.SerializationException: could not deserialize
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_191]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_191]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_191]
.......（太长了懒得粘了省略）
**Caused by:
java.io.StreamCorruptedException: invalid stream header: 77327070
**
at java.io.ObjectInputStream.readStreamHeader(ObjectInputStream.java:866) ~[na:1.8.0_191]
at java.io.ObjectInputStream.(ObjectInputStream.java:358) ~[na:1.8.0_191]
at org.hibernate.internal.util.SerializationHelper$CustomObjectInputStream.(SerializationHelper.java:309) ~[hibernate-core-5.3.7.Final.jar:5.3.7.Final]
at org.hibernate.internal.util.SerializationHelper$CustomObjectInputStream.(SerializationHelper.java:299) ~[hibernate-core-5.3.7.Final.jar:5.3.7.Final]
at org.hibernate.internal.util.SerializationHelper.doDeserialize(SerializationHelper.java:218) ~[hibernate-core-5.3.7.Final.jar:5.3.7.Final]
... 110 common frames omitted
5，配置用的是：application.properties 具体是：
#port is update
server.port=8080
#connection
spring.datasource.driverClassName=com.microsoft.sqlserver.jdbc.SQLServerDriver
spring.datasource.url=jdbc:sqlserver://localhost:1433;DatabaseName=tzc12
spring.datasource.username=sa1
spring.datasource.password=qq
hibernate.dialect=org.hibernate.dialect.SQLServerDialect
spring.jpa.properties.hibernate.show_sql=true
spring.jpa.hibernate.ddl-auto = update
Naming strategy
spring.jpa.hibernate.naming-strategy = org.hibernate.cfg.ImprovedNamingStrategy
#controller
spring.mvc.view.prefix=/
spring.mvc.view.suffix=.jsp
#Connection Pool
spring.datasource.initialSize=5
spring.datasource.minIdle=5
spring.datasource.maxActive=20
spring.datasource.maxWait=60000
spring.datasource.timeBetweenEvictionRunsMillis=60000
spring.datasource.minEvictableIdleTimeMillis=300000
spring.datasource.validationQuery=SELECT 1 FROM DUAL
spring.datasource.testWhileIdle=true
spring.datasource.testOnBorrow=false
spring.datasource.testOnReturn=false
除外，测试查询方法时junit未报错，但出现了以下情况是什么原因？如何解决：
JpaRepository层看最上面
service层：
@Override
public Page<sd> findByPages(Pageable pageable) {
// TODO Auto-generated method stub
return cd.findAll(pageable);
}
@Test
public void querypro() {
int page=1,size=10;
Sort sort = new Sort(Direction.DESC, "pid");
Pageable pageable = new PageRequest(page, size, sort);
System.out.println(cps.findByPages(pageable));
}
结果出来为：
Page 2 of 1 containing UNKNOWN instances
更新后：
实体类：
sd为主表，cds为附表，即cds 的主键是sd的外键。
@Entity
@Table(name="cftbiop")
public class sd implements Serializable{
/**
*
*/
private static final long serialVersionUID = 8786038170195933216L;
@Id
private String pid=(UUID.randomUUID().toString()) ;
private String pname ;
private String introduction;
private String marque;
private String showcase;
private String waytoraise ;
private int suppot;
private int raisefunds ;
private int goalnum ;
private cds showid;
@ManyToOne
@JoinColumn(name="showid")
public cds getShowid() {
return showid;
}
public void setShowid(CFShowProspecification showid) {
this.showid = showid;
}
private boolean homepagedisplay;
private int price;
其余getter,setter省略不粘了，都已getter,setter，
测试查询方法，把page改为0后，报了和删除，修改一样的错误
