我的应用程序抛出此异常。 我使用Java DB作为后端,我正在使用JPA
内部例外: java.sql.SQLException:表/视图 'POCKETMONEY'已经存在于Schema中 'APP'。错误代码:30000呼叫:创建 表APP.POCKETMONEY(ID INTEGER NOT NULL,DateofSpending DATE,DESCRIPTION VARCHAR(255),AMOUNT INTEGER,PRIMARY KEY(ID))查询:DataModifyQuery()
内部例外: java.sql.SQLException:表/视图 Scheme中已经存在'SEQUENCE' “管理员”。错误代码:30000电话: CREATE TABLE SEQUENCE(SEQ_NAME VARCHAR(50)NOT NULL,SEQ_COUNT DECIMAL,PRIMARY KEY(SEQ_NAME)) 查询:DataModifyQuery()
这是我的JPA代码
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package mymoney;
import java.io.Serializable;
import java.util.Date;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;
import javax.persistence.Temporal;
import javax.persistence.TemporalType;
/**
*
* @author sugan
*/
@Entity
@Table(schema = "APP")
public class pocketMoney implements Serializable {
private static final long serialVersionUID = 1L;
@Id
@GeneratedValue(strategy=GenerationType.TABLE)
private int id;
@Temporal(TemporalType.DATE)
@Column(name = "DateofSpending")
private Date dos;
private String description;
private int amount;
public int getAmount() {
return amount;
}
public void setAmount(int amount) {
this.amount = amount;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
public Date getDos() {
return dos;
}
public void setDos(Date dos) {
this.dos = dos;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
@Override
public int hashCode() {
int hash = 0;
hash += (int) id;
return hash;
}
@Override
public boolean equals(Object object) {
// TODO: Warning - this method won't work in the case the id fields are not set
if (!(object instanceof pocketMoney)) {
return false;
}
pocketMoney other = (pocketMoney) object;
if (this.id != other.id) {
return false;
}
return true;
}
@Override
public String toString() {
return "mymoney.pocketMoney[id=" + id + "]";
}
}
的persistence.xml
<?xml version="1.0" encoding="UTF-8"?>
<persistence version="1.0" xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd">
<persistence-unit name="myMoneyPU" transaction-type="RESOURCE_LOCAL">
<provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>
<class>mymoney.pocketMoney</class>
<properties>
<property name="eclipselink.jdbc.password" value="adminadmin"/>
<property name="eclipselink.jdbc.user" value="admin"/>
<property name="eclipselink.jdbc.driver" value="org.apache.derby.jdbc.EmbeddedDriver"/>
<property name="eclipselink.jdbc.url" value="jdbc:derby:pocketmoney;create=true"/>
<property name="eclipselink.ddl-generation" value="drop-and-create-tables"/>
</properties>
</persistence-unit>
</persistence>
答案 0 :(得分:2)
无论您使用哪种JPA提供程序,我都怀疑它是否已配置为生成和导出与您的映射相对应的数据库对象......以及那些已存在的数据库对象。
根据您的配置,在JPA提供程序上,根据确切的消息(EclipseLink将此类消息记录为警告AFAIK),这可能只是正常或“配置错误”。
如果您想了解更多详情,请告诉我们您使用的提供商并展示您的persistence.xml
。
更新:正如怀疑的那样,您正在使用EclipseLink并且这些消息是“正常的”(如果您仔细查看消息IIRC,它们将被记录为警告)