spring开发_Spring_DataSource

项目结构：

http://www.cnblogs.com/hongten/gallery/image/112745.html

/spring_2100_spring_dataSource/src/com/b510/db/SpringDataSource.java

 1 package com.b510.db;
 2 
 3 import java.sql.Connection;
 4 import java.sql.ResultSet;
 5 import java.sql.SQLException;
 6 import java.sql.Statement;
 7 import java.util.ArrayList;
 8 import java.util.List;
 9 
10 import javax.annotation.Resource;
11 import javax.sql.DataSource;
12 
13 import com.b510.domain.Person;
14 
15 public class SpringDataSource {
16 
17     private DataSource dataSource;
18 
19     public DataSource getDataSource() {
20         return dataSource;
21     }
22 
23     @Resource
24     public void setDataSource(DataSource dataSource) {
25         this.dataSource = dataSource;
26     }
27 
28     /**
29      * 保存一条记录
30      * 
31      * @param p
32      *            Person的一个实例对象
33 */
34     public void save(Person p) {
35         String sql = "insert into person(name,age,sex)values(" + "'"
36                 + p.getName() + "'" + "," + "'" + p.getAge() + "'" + "," + "'"
37                 + p.getSex() + "'" + ")";
38         Connection conn = null;
39         try {
40             conn = dataSource.getConnection();
41             Statement statement = conn.prepareStatement(sql);
42             statement.executeUpdate(sql);
43         } catch (SQLException e) {
44             e.printStackTrace();
45         } finally {
46             try {
47                 conn.close();
48             } catch (SQLException e) {
49                 e.printStackTrace();
50             }
51         }
52     }
53 
54     /**
55      * 获取所有记录
56      * 
57      * @return 返回一个list对象
58 */
59     public List<Person> getPerson() {
60         String sql = "select * from person";
61         Connection conn = null;
62         List<Person> list = new ArrayList<Person>();
63         try {
64             conn = dataSource.getConnection();
65             Statement statement = conn.prepareStatement(sql);
66             ResultSet rs = statement.executeQuery(sql);
67             Person person = null;
68             while (rs.next()) {
69                 person = new Person();
70                 person.setId(rs.getInt("id"));
71                 person.setName(rs.getString("name"));
72                 person.setAge(rs.getInt("age"));
73                 person.setSex(rs.getString("sex"));
74                 list.add(person);
75             }
76         } catch (SQLException e) {
77             e.printStackTrace();
78         } finally {
79             try {
80                 conn.close();
81             } catch (SQLException e) {
82                 e.printStackTrace();
83             }
84         }
85         return list;
86     }
87 }

/spring_2100_spring_dataSource/src/com/b510/domain/Person.java

 1 package com.b510.domain;
 2 
 3 import org.springframework.stereotype.Component;
 4 
 5 /**
 6  * Person实体类
 7  * 
 8  * @author Hongten
 9  * 
10  */
11 @Component
12 public class Person implements java.io.Serializable {
13 
14     // Fields
15 
16     /**
17      * 版本号
18 */
19     private static final long serialVersionUID = -47270870639923184L;
20     /**
21      * id号
22 */
23     private Integer id;
24     /**
25      * 姓名
26 */
27     private String name;
28     /**
29      * 年龄
30 */
31     private Integer age;
32     /**
33      * 性别
34 */
35     private String sex;
36 
37     // Constructors
38 
39     /** default constructor */
40     public Person() {
41     }
42 
43     /** minimal constructor */
44     public Person(String name) {
45         this.name = name;
46     }
47 
48     /** full constructor */
49     public Person(String name, Integer age, String sex) {
50         this.name = name;
51         this.age = age;
52         this.sex = sex;
53     }
54 
55     // Property accessors
56 
57     public Integer getId() {
58         return this.id;
59     }
60 
61     public void setId(Integer id) {
62         this.id = id;
63     }
64 
65     public String getName() {
66         return this.name;
67     }
68 
69     public void setName(String name) {
70         this.name = name;
71     }
72 
73     public Integer getAge() {
74         return this.age;
75     }
76 
77     public void setAge(Integer age) {
78         this.age = age;
79     }
80 
81     public String getSex() {
82         return this.sex;
83     }
84 
85     public void setSex(String sex) {
86         this.sex = sex;
87     }
88 
89 }

/spring_2100_spring_dataSource/src/com/b510/test/SpringTest.java

 1 package com.b510.test;
 2 
 3 import java.util.List;
 4 
 5 import org.springframework.context.ApplicationContext;
 6 import org.springframework.context.support.ClassPathXmlApplicationContext;
 7 
 8 import com.b510.db.SpringDataSource;
 9 import com.b510.domain.Person;
10 
11 public class SpringTest {
12 
13     /**
14      * @param args
15 */
16     public static void main(String[] args) {
17         ApplicationContext act = new ClassPathXmlApplicationContext("bean.xml");
18         SpringDataSource sds = (SpringDataSource) act.getBean("sds");
19         Person person = new Person("hw", 20, "M");
20         sds.save(person);
21 
22         List<Person> list = sds.getPerson();
23         for (Person p : list) {
24             System.out.println("id=" + p.getId() + ",name=" + p.getName()
25                     + ",age=" + p.getAge() + ",sex=" + p.getSex());
26         }
27     }
28 
29 }

/spring_2100_spring_dataSource/src/bean.xml

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <beans xmlns="http://www.springframework.org/schema/beans"
 3     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
 4     xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
 5     xsi:schemaLocation="http://www.springframework.org/schema/beans
 6            http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
 7            http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd
 8            http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd
 9            http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd">
10     <context:annotation-config />
11 
12     <!-- 读取jdbc.properties配置文件 -->
13     <context:property-placeholder location="classpath:jdbc.properties" />
14 
15     <!-- 配置数据源 -->
16     <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
17         destroy-method="close">
18         <property name="driverClassName" value="${driverClassName}" />
19         <property name="url" value="${url}" />
20         <property name="username" value="${username}" />
21         <property name="password" value="${password}" />
22         <!-- 连接池启动时的初始值 -->
23         <property name="initialSize" value="${initialSize}" />
24         <!-- 连接池的最大值 -->
25         <property name="maxActive" value="${maxActive}" />
26         <!-- 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 -->
27         <property name="maxIdle" value="${maxIdle}" />
28         <!--  最小空闲值.当空闲的连接数少于阀值时，连接池就会预申请去一些连接，以免洪峰来时来不及申请 -->
29         <property name="minIdle" value="${minIdle}" />
30     </bean>
31 
32     <bean id="sds" class="com.b510.db.SpringDataSource"></bean>
33 </beans>

/spring_2100_spring_dataSource/src/jdbc.properties

1 driverClassName=org.gjt.mm.mysql.Driver
2 url=jdbc\:mysql\://localhost\:3307/spring?useUnicode\=true&characterEncoding\=UTF-8
3 username=root
4 password=root
5 initialSize=1
6 maxActive=300
7 maxIdle=2
8 minIdle=1

 运行结果：

 1 2012-3-14 17:23:22 org.springframework.context.support.AbstractApplicationContext prepareRefresh
 2 信息: Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@1a05308: display name [org.springframework.context.support.ClassPathXmlApplicationContext@1a05308]; startup date [Wed Mar 14 17:23:22 CST 2012]; root of context hierarchy
 3 2012-3-14 17:23:22 org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions
 4 信息: Loading XML bean definitions from class path resource [bean.xml]
 5 2012-3-14 17:23:22 org.springframework.context.support.AbstractApplicationContext obtainFreshBeanFactory
 6 信息: Bean factory for application context [org.springframework.context.support.ClassPathXmlApplicationContext@1a05308]: org.springframework.beans.factory.support.DefaultListableBeanFactory@74c3aa
 7 2012-3-14 17:23:22 org.springframework.core.io.support.PropertiesLoaderSupport loadProperties
 8 信息: Loading properties file from class path resource [jdbc.properties]
 9 2012-3-14 17:23:22 org.springframework.beans.factory.support.DefaultListableBeanFactory preInstantiateSingletons
10 信息: Pre-instantiating singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@74c3aa: defining beans [org.springframework.context.annotation.internalCommonAnnotationProcessor,org.springframework.context.annotation.internalAutowiredAnnotationProcessor,org.springframework.context.annotation.internalRequiredAnnotationProcessor,org.springframework.beans.factory.config.PropertyPlaceholderConfigurer#0,dataSource,sds]; root of factory hierarchy
11 id=2,name=hanyuan,age=21,sex=男
12 id=3,name=hongten,age=21,sex=男
13 id=4,name=hongten,age=21,sex=男
14 id=5,name=hello,age=12,sex=M
15 id=6,name=hongten,age=12,sex=M
16 id=7,name=hongten2,age=12,sex=M
17 id=8,name=hw,age=20,sex=M
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原文地址：https://www.cnblogs.com/hongten/p/java_spring_dataSource.html