JPA Hibernate整合异常

JPA Hibernate整合错误~
[color=#FF0000][/color]JPA配置

XML code

<?xml version="1.0"?><persistence 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" version="1.0">  <persistence-unit name="library" transaction-type="RESOURCE_LOCAL">      <provider>org.hibernate.ejb.HibernatePersistence</provider>    <properties>         <property name="hibernate.dialect" value="org.hibernate.dialect.MySQL5Dialect"/>         <property name="hibernate.connection.driver_class" value="org.gjt.mm.mysql.Driver"/>         <property name="hibernate.connection.username" value="root"/>         <property name="hibernate.connection.password" value="123456"/>         <property name="hibernate.connection.url" value="jdbc:mysql://localhost:3306/library?useUnicode=true&amp;characterEncoding=UTF-8"/>                 <property name="hibernate.max_fetch_depth" value="3"/>         <property name="hibernate.hbm2ddl.auto" value="update"/>         <property name="hibernate.jdbc.fetch_size" value="3"/>         <property name="hibernate.jdbc.batch_size" value="10"/>         <property name="hibernate.show_sql" value="true"/>         <property name="hibernate.format_sql" value="false"/>      </properties>  </persistence-unit></persistence>

XML code

<context:component-scan base-package="edu.jmu"/>    <bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalEntityManagerFactoryBean">      <property name="persistenceUnitName" value="library"/>  </bean>    <bean id="txManager" class="org.springframework.orm.jpa.JpaTransactionManager">      <property name="entityManagerFactory" ref="entityManagerFactory"/>  </bean>    <tx:annotation-driven transaction-manager="txManager"/>

Java code

@Entitypublic class User implements Serializable{    /**     *      */    private static final long serialVersionUID = -2491807508669383375L;    private int id;    private String name;    private String password;    private Set<BorrowBook> borrowBooks;        @Id    @GeneratedValue(strategy = GenerationType.AUTO)    public int getId() {        return id;    }    public void setId(int id) {        this.id = id;    }    @Column(length = 10)    public String getName() {        return name;    }    public void setName(String name) {        this.name = name;    }    @Column(length = 10)    public String getPassword() {        return password;    }    public void setPassword(String password) {        this.password = password;    }    @OneToMany(cascade={CascadeType.PERSIST,CascadeType.MERGE},mappedBy="user",fetch = FetchType.LAZY )        public Set<BorrowBook> getBorrowBooks() {        return borrowBooks;    }    public void setBorrowBooks(Set<BorrowBook> borrowBooks) {        this.borrowBooks = borrowBooks;    }    }

Java code

package edu.jmu.bean;import java.util.Date;import javax.persistence.Column;import javax.persistence.FetchType;import javax.persistence.GeneratedValue;import javax.persistence.GenerationType;import javax.persistence.Id;import javax.persistence.JoinColumn;import javax.persistence.ManyToOne;import javax.persistence.OneToOne;import javax.persistence.Temporal;import javax.persistence.TemporalType;public class BorrowBook implements java.io.Serializable{    /**     *      */    private static final long serialVersionUID = -6773524592176308024L;    private int id;    private User user;    private int bookId;    private Date date;        private Book book;        @Id    @GeneratedValue(strategy = GenerationType.AUTO)    public int getId() {        return id;    }    public void setId(int id) {        this.id = id;    }        @Column()    public int getBookId() {        return bookId;    }    public void setBookId(int bookId) {        this.bookId = bookId;    }    @Temporal(TemporalType.DATE)    public Date getDate() {        return date;    }    public void setDate(Date date) {        this.date = date;    }        @ManyToOne(fetch=FetchType.LAZY)    @JoinColumn(name = "userId", nullable = false)    public User getUser() {        return user;    }    public void setUser(User user) {        this.user = user;    }        public Book getBook() {        return book;    }    public void setBook(Book book) {        this.book = book;    }}