嗨，我正在尝试从数据库中选择某些实体，但是当我使用@Delete时，在浏览器中会出现错误，但是Get可以正常工作。我正在使用休眠JPA
这是我的代码示例
@Entity
def VectorSpaceMatrix(files__, dict__):
assert isinstance(files__, list)
assert isinstance(dict__, dict)
termlist = []
filelist = []
for terms in dict__.keys():
termlist.append(terms)
for fileid in files__:
filelist.append(fileid)
sfl = SortFiles(filelist)
termlist.sort()
vecmat = np.zeros(((len(sfl)), (len(termlist))))
for row in enumerate(termlist):
if row[1] in dict__.keys():
for column in sfl:
if column[1] in dict__[row[1]].keys():
#pprint.pprint(dict__[row[1]][column[1]][4])
tfidf = float(dict__.get(row[1]).get(column[1])[4])
c_index = column[0]
r_index = row[0]
index = np.array([r_index, c_index])
insert = np.ravel_multi_index(index.T, vecmat.shape)
np.put(vecmat, insert, tfidf, mode='clip')
df = pd.DataFrame(vecmat, index=sfl, columns=termlist)
df.to_csv("df.csv", index=True, header=True, sep=' ')
presistance.xml
package pl.test.model;
import javax.persistence.*;
import java.util.Collection;
@Entity
public class Mestechnologygroup {
private Integer idTechnologyGroup;
private String name;
private String description;
private Integer number;
private Collection<Mestechnology> mestechnologiesByIdTechnologyGroup;
@Id
@Column(name = "idTechnologyGroup")
public Integer getIdTechnologyGroup() {
return idTechnologyGroup;
}
public void setIdTechnologyGroup(Integer idTechnologyGroup) {
this.idTechnologyGroup = idTechnologyGroup;
}
@Basic
@Column(name = "Name")
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
@Basic
@Column(name = "Description")
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
@Basic
@Column(name = "Number")
public Integer getNumber() {
return number;
}
public void setNumber(Integer number) {
this.number = number;
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
Mestechnologygroup that = (Mestechnologygroup) o;
if (idTechnologyGroup != null ? !idTechnologyGroup.equals(that.idTechnologyGroup) : that.idTechnologyGroup != null)
return false;
if (name != null ? !name.equals(that.name) : that.name != null) return false;
if (description != null ? !description.equals(that.description) : that.description != null) return false;
if (number != null ? !number.equals(that.number) : that.number != null) return false;
return true;
}
@Override
public int hashCode() {
int result = idTechnologyGroup != null ? idTechnologyGroup.hashCode() : 0;
result = 31 * result + (name != null ? name.hashCode() : 0);
result = 31 * result + (description != null ? description.hashCode() : 0);
result = 31 * result + (number != null ? number.hashCode() : 0);
return result;
}
@OneToMany(mappedBy = "mestechnologygroupByIdTechnologyGroup")
public Collection<Mestechnology> getMestechnologiesByIdTechnologyGroup() {
return mestechnologiesByIdTechnologyGroup;
}
public void setMestechnologiesByIdTechnologyGroup(Collection<Mestechnology> mestechnologiesByIdTechnologyGroup) {
this.mestechnologiesByIdTechnologyGroup = mestechnologiesByIdTechnologyGroup;
}
}
具有方法的存储库
<?xml version="1.0" encoding="UTF-8"?>
<persistence xmlns="http://java.sun.com/xml/ns/persistence" version="2.0">
<persistence-unit name="testPU" transaction-type="JTA">
<provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>
<class>pl.test.model.Mesattachmentoperation</class>
<class>pl.test.model.Mesattachmenttechnology</class>
<class>pl.test.model.Mesoperation</class>
<class>pl.test.model.Mesoperationdictionary</class>
<class>pl.test.model.Mesoperationstate</class>
<class>pl.test.model.Mesproduct</class>
<class>pl.test.model.Mesproducttype</class>
<class>pl.test.model.Mesproductxoperation</class>
<class>pl.test.model.Mesresource</class>
<class>pl.test.model.Mesresourcexoperation</class>
<class>pl.test.model.Mestechnology</class>
<class>pl.test.model.Mestechnologygroup</class>
<class>pl.test.model.Mesusers</class>
<properties>
<property name="hibernate.connection.driver_class" value="org.postgresql.Driver"/>
<property name="hibernate.connection.url" value="jdbc:postgresql://localhost:5432/mes"/>
<property name="hibernate.connection.username" value="postgres"/>
<property name="hibernate.connection.password" value="xxxx"/>
<property name="hibernate.dialect" value="org.hibernate.dialect.PostgreSQL9Dialect"/>
</properties>
</persistence-unit>
</persistence>
在这里我使用@Delete
package pl.test.repo;
import com.sun.istack.internal.NotNull;
import pl.test.model.Mestechnologygroup;
import pl.test.model.Mesusers;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.Persistence;
import javax.persistence.TypedQuery;
import javax.transaction.Transactional;
import java.util.List;
import static javax.transaction.Transactional.TxType.REQUIRED;
import static javax.transaction.Transactional.TxType.SUPPORTS;
@Transactional(SUPPORTS)
public class TechnologyGroupRepo {
EntityManagerFactory entityManagerFactory = Persistence.createEntityManagerFactory("testPU");
EntityManager em = entityManagerFactory.createEntityManager();
public Mestechnologygroup find(@NotNull Integer id) {
return em.find(Mestechnologygroup.class, id);
}
public List<Mestechnologygroup> findAll() {
TypedQuery<Mestechnologygroup> query = em.createQuery("from Mestechnologygroup ", Mestechnologygroup.class);
return query.getResultList();
}
@Transactional(REQUIRED)
public void delete(@NotNull Integer id) {
em.remove(em.getReference(Mestechnologygroup.class, id));
}
}
我建议在Google Chrome中回复 Response
我将不胜感激：）预先感谢；）
答案 0 :(得分：1)
您面临的问题是因为始终通过GET http方法访问浏览器URL。您无法使用其他http方法。
为了测试DELETE端点，您必须使用REST客户端来完成它。
其余客户端的一些示例：命令行：curl，wget。使用GUI：Postman，Insomnia。
从命令行执行此操作的示例：
curl -X DELETE "http://localhost:8080/test-1.0-SNAPSHOT/resources/tg/d/22"
答案 1 :(得分：0)
@Delete我在浏览器中遇到错误，但Get正常工作。
当您在浏览器中点击url时，它将作为GET请求。
除了通过浏览器执行GET之外，您无法发出其他任何请求，因此GET可以正常工作。
尝试使用http客户端工具（如邮递员等）或curl。