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Java开发之Spring连接数据库方法实例分析

2019年07月22日  | 移动技术网IT编程  | 我要评论

本文实例讲述了java开发之spring连接数据库方法。分享给大家供大家参考，具体如下：
接口：

package cn.com.service; 
import java.util.list; 
import cn.com.bean.personbean; 
public interface personservice { 
 //保存 
 public void save(personbean person); 
 //更新 
 public void update(personbean person); 
 //获取person 
 public personbean getperson(int id); 
 public list<personbean> getpersonbean(); 
 //删除记录 
 public void delete(int personid); 
}

person bean类：

package cn.com.bean; 
public class personbean { 
 private int id; 
 private string name; 
 public personbean(string name) { 
  this.name=name; 
 } 
 public int getid() { 
  return id; 
 } 
 public void setid(int id) { 
  this.id = id; 
 } 
 public string getname() { 
  return name; 
 } 
 public void setname(string name) { 
  this.name = name; 
 } 
}

接口实现：

package cn.com.service.impl; 
import java.util.list; 
import javax.sql.datasource; 
import org.springframework.jdbc.core.jdbctemplate; 
import cn.com.bean.personbean; 
import cn.com.service.personservice; 
public class personserviceimpl implements personservice { 
 private jdbctemplate jdbctemplate; 
 public void setdatasource(datasource datasource) { 
  this.jdbctemplate = new jdbctemplate(datasource); 
 } 
 @override 
 public void save(personbean person) { 
  // todo auto-generated method stub 
  jdbctemplate.update("insert into person(name) values(?)", new object[]{person.getname()}, 
    new int[]{java.sql.types.varchar}); 
 } 
 @override 
 public void update(personbean person) { 
  // todo auto-generated method stub 
  jdbctemplate.update("update person set name=? where id=?", new object[]{person.getname(),person.getid()}, 
    new int[]{java.sql.types.varchar,java.sql.types.integer}); 
 } 
 @override 
 public personbean getperson(int id) { 
  // todo auto-generated method stub 
  return (personbean)jdbctemplate.queryforobject("select * from person where id=?", new object[]{id}, 
    new int[]{java.sql.types.integer},new personrowmapper() ); 
 } 
 @suppresswarnings("unchecked") 
 @override 
 public list<personbean> getpersonbean() { 
  // todo auto-generated method stub 
  return (list<personbean>)jdbctemplate.query("select * from person", 
    new personrowmapper() ); 
 } 
 @override 
 public void delete(int personid) { 
  // todo auto-generated method stub 
  jdbctemplate.update("delete from person where id=?", new object[]{personid},
    new int[]{java.sql.types.integer}); 
 } 
}

rowmapper:

package cn.com.service.impl; 
import java.sql.resultset; 
import java.sql.sqlexception; 
import org.springframework.jdbc.core.rowmapper; 
import cn.com.bean.personbean; 
public class personrowmapper implements rowmapper { 
 @override 
 public object maprow(resultset rs, int index) throws sqlexception { 
  // todo auto-generated method stub 
  personbean person =new personbean(rs.getstring("name")); 
  person.setid(rs.getint("id")); 
  return person; 
 } 
}

beans.xml配置

<?xml version="1.0" encoding="utf-8"?> 
<beans xmlns="http://www.springframework.org/schema/beans" 
  xmlns:xsi="http://www.w3.org/2001/xmlschema-instance" 
  xmlns:context="http://www.springframework.org/schema/context" 
  xmlns:aop="http://www.springframework.org/schema/aop" 
  xmlns:tx="http://www.springframework.org/schema/tx" 
  xsi:schemalocation="http://www.springframework.org/schema/beans 
   http://www.springframework.org/schema/beans/spring-beans-2.5.xsd 
   http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd 
   http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd 
   http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd 
   ">   
    <!-- <context:property-placeholder location="classpath:jdbc.properties"/> --> 
    <bean id="datasource" class="org.apache.commons.dbcp.basicdatasource" destroy-method="close"> 
    <property name="driverclassname" value="com.mysql.jdbc.driver"/> 
    <property name="url" value="jdbc:mysql://localhost:3306/wy"/> 
    <property name="username" value="root"/> 
    <!-- property池启动时的初始值 --> 
     <property name="password" value="123"/> 
     <!-- 连接name="initialsize" value="${initialsize}"/>--> 
     <property name="initialsize" value="1"/> 
     <!-- 连接池的最大值 --> 
     <property name="maxactive" value="500"/> 
     <!-- 最大空闲值.当经过一个高峰时间后，连接池可以慢慢将已经用不到的连接慢慢释放一部分，一直减少到maxidle为止 --> 
     <property name="maxidle" value="2"/> 
     <!-- 最小空闲值.当空闲的连接数少于阀值时，连接池就会预申请去一些连接，以免洪峰来时来不及申请 --> 
     <property name="minidle" value="1"/> 
    </bean> 
    <bean id="txmanager" class="org.springframework.jdbc.datasource.datasourcetransactionmanager"> 
    <property name="datasource" ref="datasource"/> 
    </bean> 
    <tx:annotation-driven transaction-manager="txmanager"/> 
    <bean id="personservice" class="cn.com.service.impl.personserviceimpl"> 
    <property name="datasource" ref="datasource"></property> 
    </bean> 
</beans>

测试类：

package junit.test; 
import static org.junit.assert.*; 
import org.junit.beforeclass; 
import org.junit.test; 
import org.springframework.context.applicationcontext; 
import org.springframework.context.support.classpathxmlapplicationcontext; 
import cn.com.bean.personbean; 
import cn.com.service.personservice; 
public class persontest2 { 
 private static personservice personservice; 
 @beforeclass 
 public static void setupbeforeclass() throws exception { 
 applicationcontext act=new classpathxmlapplicationcontext("beans.xml"); 
 personservice=(personservice) act.getbean("personservice"); 
 } 
 @test 
 public void save() { 
 personservice.save(new personbean("wyy")); 
 } 
 @test 
 public void update() { 
 personbean person=personservice.getperson(1); 
 person.setname("wy"); 
 personservice.update(person); 
 } 
 @test 
 public void getperson() { 
 personbean person=personservice.getperson(1); 
 system.out.println(person.getname()); 
 } 
 @test 
 public void delete() { 
 personservice.delete(1); 
 } 
}

数据库：

create table 
create table `person` ( 
 `id` int(11) not null auto_increment, 
 `name` varchar(10) not null, 
 primary key (`id`) 
) engine=innodb auto_increment=2 default charset=utf8

希望本文所述对大家java程序设计有所帮助。

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