今天在使用hibernate的时候，插入mysql的数据中的中文总是显示乱码，之前出现过类似的问题，但是没有太在意，今天又发生了。所以向彻底的解决一下。
参考的博文： http://www.cnblogs.com/amboyna/archive/2008/06/18/1224570.html
我的实体类:
package com.entity; import java.io.Serializable;
import java.util.Date; import javax.persistence.Column;
import javax.persistence.Entity; /*JPA注解*/
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table; import org.hibernate.annotations.GenericGenerator; /**
* 学生实体类
* @author Administrator
*
*/
//@Entity(name="t_students")
@Entity//表示这是一个实体类
@Table(name="t_students",schema="bookshop")//修改数据库中映射的表名
//schema:表示数据库的名称
//name:表示数据库的表名
//Embedddable注解表示一个非Entity类，但是可以嵌入到另外一个实体类中作为属性而存在
public class Students implements Serializable{ //private int sid; //学号
private String sid; //将学号改成字符串类型
private String sname; //姓名
private String gender; //性别
private Date birthday;//出生日期
private String major;//专业
//private String address; //地址
private Address add;//地址 public Address getAdd() {
return add;
} public void setAdd(Address add) {
this.add = add;
} public Students()
{ } public Students(String sid, String sname, String gender, Date birthday,
String major,Address add) {
super();
this.sid = sid;
this.sname = sname;
this.gender = gender;
this.birthday = birthday;
this.major = major;
//this.address = address;
this.add = add;
} @Id
//@GeneratedValue //默认生成策略为自动增长
//@GeneratedValue(strategy=GenerationType.AUTO)//手动设置自动增长(但是将主
//键字段改成字符串类型之后不可以实现子哦的那个增自动增长了，这时候可以实现的后宫复制)
//@GeneratedValue(strategy=GenerationType.IDENTITY)//
@GeneratedValue(generator="sid")
@GenericGenerator(name="sid",strategy="assigned")//主键手工赋值
@Column(length=20)//但是还是没有生成数据库表，因此，字符串为主键时不可以指定主键的生成策略为AUTO_increment
//的
public String getSid() {
return sid;
} public void setSid(String sid) {
this.sid = sid;
} //@Id
//@Column(length=20)
public String getSname() {
return sname;
} public void setSname(String sname) {
this.sname = sname;
} public String getGender() {
return gender;
} public void setGender(String gender) {
this.gender = gender;
} public Date getBirthday() {
return birthday;
} public void setBirthday(Date birthday) {
this.birthday = birthday;
} public String getMajor() {
return major;
} public void setMajor(String major) {
this.major = major;
} }
以下是我的hibernate.cfg.xml的配置情况：
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd"> <!-- old: http://hibernate.sourceforge.net/hibernate-configuration-3.6.dtd -->
<!-- new: http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd -->
<!-- : http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd -->
<hibernate-configuration>
<session-factory>
<!-- 显示sql语句 -->
<property name="show_sql">true</property>
<property name="myeclipse.connection.profile">bookshop</property>
<!-- <property name="connection.url">
jdbc:mysql://localhost:3306/bookshop
jdbc:mysql://localhost:3306/database?useUnicode=true&characterEncoding=UTF-8
</property> --> <property name="connection.url">jdbc:mysql://localhost:3306/hibernate?useUnicode=true&characterEncoding=UTF-8</property>
<property name="connection.username">root</property>
<property name="connection.password">xxxxxxxxcc</property>
<property name="connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="dialect">org.hibernate.dialect.MySQLDialect</property>
<property name="format_sql">true</property>
<property name="hbm2ddl.auto">update</property>
<property name="hibernate.current_session_context_class">thread</property> <!-- 将实体类映射到数据库 -->
<mapping class="com.entity.Students"/>
</session-factory>
</hibernate-configuration>
之后生成数据库表结构：
@Test
public void testShemaExport(){
//创建Hibernate配置对象
Configuration configuration = new Configuration().configure(); //创建服务注册对象
ServiceRegistry serviceRegistry =
new ServiceRegistryBuilder()
.applySettings(configuration.getProperties())
.buildServiceRegistry(); //创建sessionFactory
SessionFactory sessionFactory = configuration.buildSessionFactory(serviceRegistry); //生成SchemaExport对象
SchemaExport export = new SchemaExport(configuration);
//调用schemaExport的create生成数据库表结构
export.create(true, true);
}
将数据插入数据库：
@Test
public void addStudents()
{
//创建Hibernate配置对象
Configuration configuration = new Configuration().configure(); //创建服务注册对象
ServiceRegistry serviceRegistry =
new ServiceRegistryBuilder()
.applySettings(configuration.getProperties())
.buildServiceRegistry(); //创建sessionFactory
SessionFactory sessionFactory = configuration.buildSessionFactory(serviceRegistry);
//创建会话
Session session = sessionFactory.getCurrentSession();
//创建事务
Transaction tx = session.beginTransaction(); //创建一个地址对象
Address add = new Address("700005","武当山","1388732789");
//创建一个学生对象
Students s = new Students("S00000001","张三丰","男", new Date(),"太极拳",add);
//保存session
session.save(s);//在没有执行commit之前数据库里面是没有保存数据的
tx.commit();
}
log:
2016-4-16 14:46:47 org.hibernate.annotations.common.Version <clinit>
INFO: HCANN000001: Hibernate Commons Annotations {4.0.2.Final}
2016-4-16 14:46:47 org.hibernate.Version logVersion
INFO: HHH000412: Hibernate Core {4.2.21.Final}
2016-4-16 14:46:47 org.hibernate.cfg.Environment <clinit>
INFO: HHH000206: hibernate.properties not found
2016-4-16 14:46:47 org.hibernate.cfg.Environment buildBytecodeProvider
INFO: HHH000021: Bytecode provider name : javassist
2016-4-16 14:46:47 org.hibernate.cfg.Configuration configure
INFO: HHH000043: Configuring from resource: /hibernate.cfg.xml
2016-4-16 14:46:47 org.hibernate.cfg.Configuration getConfigurationInputStream
INFO: HHH000040: Configuration resource: /hibernate.cfg.xml
2016-4-16 14:46:47 org.hibernate.cfg.Configuration doConfigure
INFO: HHH000041: Configured SessionFactory: null
2016-4-16 14:46:47 org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure
WARN: HHH000402: Using Hibernate built-in connection pool (not for production use!)
2016-4-16 14:46:48 org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure
INFO: HHH000115: Hibernate connection pool size: 20
2016-4-16 14:46:48 org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure
INFO: HHH000006: Autocommit mode: false
2016-4-16 14:46:48 org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure
INFO: HHH000401: using driver [com.mysql.jdbc.Driver] at URL [jdbc:mysql://localhost:3306/hibernate?useUnicode=true&characterEncoding=UTF-8]
2016-4-16 14:46:48 org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure
INFO: HHH000046: Connection properties: {user=root, password=****}
2016-4-16 14:46:48 org.hibernate.dialect.Dialect <init>
INFO: HHH000400: Using dialect: org.hibernate.dialect.MySQLDialect
2016-4-16 14:46:48 org.hibernate.engine.jdbc.internal.LobCreatorBuilder useContextualLobCreation
INFO: HHH000423: Disabling contextual LOB creation as JDBC driver reported JDBC version [3] less than 4
2016-4-16 14:46:48 org.hibernate.engine.transaction.internal.TransactionFactoryInitiator initiateService
INFO: HHH000399: Using default transaction strategy (direct JDBC transactions)
2016-4-16 14:46:48 org.hibernate.hql.internal.ast.ASTQueryTranslatorFactory <init>
INFO: HHH000397: Using ASTQueryTranslatorFactory
2016-4-16 14:46:49 org.hibernate.tool.hbm2ddl.SchemaUpdate execute
INFO: HHH000228: Running hbm2ddl schema update
2016-4-16 14:46:49 org.hibernate.tool.hbm2ddl.SchemaUpdate execute
INFO: HHH000102: Fetching database metadata
2016-4-16 14:46:49 org.hibernate.tool.hbm2ddl.SchemaUpdate execute
INFO: HHH000396: Updating schema
2016-4-16 14:46:49 org.hibernate.tool.hbm2ddl.DatabaseMetadata getTableMetadata
INFO: HHH000262: Table not found: t_students
2016-4-16 14:46:49 org.hibernate.tool.hbm2ddl.DatabaseMetadata getTableMetadata
INFO: HHH000262: Table not found: t_students
2016-4-16 14:46:49 org.hibernate.tool.hbm2ddl.DatabaseMetadata getTableMetadata
INFO: HHH000262: Table not found: t_students
2016-4-16 14:46:49 org.hibernate.tool.hbm2ddl.SchemaUpdate execute
ERROR: HHH000388: Unsuccessful: create table bookshop.t_students (sid varchar(20) not null, address varchar(255), phone varchar(255), postCode varchar(255), birthday datetime, gender varchar(255), major varchar(255), sname varchar(255), primary key (sid))
2016-4-16 14:46:49 org.hibernate.tool.hbm2ddl.SchemaUpdate execute
ERROR: Table 't_students' already exists
2016-4-16 14:46:49 org.hibernate.tool.hbm2ddl.SchemaUpdate execute
INFO: HHH000232: Schema update complete
Hibernate:
insert
into
bookshop.t_students
(address, phone, postCode, birthday, gender, major, sname, sid)
values
(?, ?, ?, ?, ?, ?, ?, ?)
数据库显示正常。中文乱码问题彻底小时。