Java在mysql插入数据的时候的乱码问题解决

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&amp;characterEncoding=UTF-8 
    </property> -->
    
    <property name="connection.url">jdbc:mysql://localhost:3306/hibernate?useUnicode=true&amp;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。

 

Java在mysql插入数据的时候的乱码问题解决

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