Spring JdbcTemplate配置
1. pom.xml，需要的spring jar包
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.jd.myspring</groupId>
<artifactId>myspring</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>myspring</name>
<description>myspring</description>
<properties>
<spring-framework.version>3.2.3.RELEASE</spring-framework.version>
</properties>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.dom4j</groupId>
<artifactId>com.springsource.org.dom4j</artifactId>
<version>1.6.1</version>
</dependency>
<dependency>
<groupId>org.apache.log4j</groupId>
<artifactId>com.springsource.org.apache.log4j</artifactId>
<version>1.2.16</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${spring-framework.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aspects</artifactId>
<version>${spring-framework.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>${spring-framework.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>${spring-framework.version}</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>1.6.1</version>
<optional>true</optional>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.26</version>
</dependency>
</dependencies>
</project>
2. application.xml
<?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:aop="http://www.springframework.org/schema/aop"
xmlns:c="http://www.springframework.org/schema/c"
xmlns:cache="http://www.springframework.org/schema/cache"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:jdbc="http://www.springframework.org/schema/jdbc"
xmlns:jee="http://www.springframework.org/schema/jee"
xmlns:lang="http://www.springframework.org/schema/lang"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:task="http://www.springframework.org/schema/task"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:util="http://www.springframework.org/schema/util"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.2.xsd
http://www.springframework.org/schema/cache http://www.springframework.org/schema/cache/spring-cache-3.2.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsd
http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-3.2.xsd
http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-3.2.xsd
http://www.springframework.org/schema/lang http://www.springframework.org/schema/lang/spring-lang-3.2.xsd
http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task-3.2.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.2.xsd
http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.2.xsd">
<!-- 开启注解 -->
<context:annotation-config/>
<context:component-scan base-package="com.jd"/>
<aop:aspectj-autoproxy></aop:aspectj-autoproxy>
<!-- 加载jdbc配置文件 -->
<!-- <bean
class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="locations">
<list>
<value>classpath*:/*.properties</value>
</list>
</property>
</bean> -->
<!-- 加载jdbc配置文件 -->
<context:property-placeholder location="jdbc.properties"/>
<!-- 定义dataSource -->
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="${jdbc.driverClassName}" />
<property name="url" value="${jdbc.url}" />
<property name="username" value="${jdbc.username}" />
<property name="password" value="${jdbc.password}" />
</bean>
<!-- 定义jdbcTemplate -->
<bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
<property name="dataSource" ref="dataSource" />
</bean>
<!-- 定义 studentDao bean，注入jdbcTemplate-->
<bean id="studentDao" class="com.jd.dao.impl.StudentDaoImpl">
<property name="template" ref="jdbcTemplate"></property>
</bean>
</beans>
3. StudentDao.java
package com.jd.dao;
import java.util.List;
public interface StudentDao<T> {
public void saveStudent();
public T queryStudent(int id);
public List<T> queryStudentList();
}
4. StudentDaoImpl.java
package com.jd.dao.impl;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.List;
import javax.annotation.Resource;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.core.RowMapper;
import com.jd.dao.StudentDao;
import com.jd.vo.Student;
public class StudentDaoImpl<T> implements StudentDao<T>{
//private DataSource dataSource;
private JdbcTemplate template;
/*public DataSource getDataSource() {
return dataSource;
}
*//**
* 注入dataSource
* @param dataSource
*//*
@Resource
public void setDataSource(DataSource dataSource) {
this.dataSource = dataSource;
this.template = new JdbcTemplate(dataSource);
}*/
public JdbcTemplate getTemplate() {
return template;
}
/**
* 注解注入
* @param template
*/
@Resource
public void setTemplate(JdbcTemplate template) {
this.template = template;
}
public void saveStudent() {
/*try {
Connection conn = dataSource.getConnection();
Student s = new Student();
s.setId(4);
s.setName("张四");
String sql = "insert into student values(?,?)";
PreparedStatement state = conn.prepareStatement(sql);
state.setInt(1, s.getId());
state.setString(2, s.getName());
state.execute();
System.out.println("保存学生成功");
} catch (SQLException e) {
e.printStackTrace();
}*/
Student s = new Student();
s.setId(7);
s.setName("张七");
template.update("insert into student values(?,?)", new Object[]{s.getId(),s.getName()}, new int[]{java.sql.Types.INTEGER,java.sql.Types.VARCHAR});
System.out.println("保存学生成功");
}
@SuppressWarnings({ "rawtypes", "unchecked" })
public T queryStudent(int id) {
//回调函数
RowMapper rowMapper = new RowMapper(){
public Object mapRow(ResultSet rs, int rowNum) throws SQLException {
Student stu = new Student();
stu.setId(rs.getInt(1));
stu.setName(rs.getString(2));
return stu;
}};
System.out.println("查询学生id：" + id);
return (T)template.queryForObject("select * from Student where id=?", new Object[]{id}, new int[]{java.sql.Types.INTEGER}, rowMapper);
}
@SuppressWarnings({ "unchecked", "rawtypes" })
public List<T> queryStudentList() {
RowMapper rowMapper = new RowMapper(){
public Object mapRow(ResultSet rs, int rowNum) throws SQLException {
Student stu = new Student();
stu.setId(rs.getInt(1));
stu.setName(rs.getString(2));
return stu;
}};
System.out.println("查询所有学生");
return (List<T>)template.query("select * from Student", null, null, rowMapper);
}
}
JdbcTemplate主要提供以下五类方法：
execute方法：可以用于执行任何SQL语句，一般用于执行DDL语句；
update方法及batchUpdate方法：update方法用于执行新增、修改、删除等语句；batchUpdate方法用于执行批处理相关语句；
query方法及queryForXXX方法：用于执行查询相关语句；
call方法：用于执行存储过程、函数相关语句。
5. 测试类
import java.util.List; import junit.framework.TestCase; import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext; import com.jd.dao.StudentDao; import com.jd.vo.Student; public class TestSpringJdbcTemplate extends TestCase { public void testSpringJdbc(){ ApplicationContext ctx = new ClassPathXmlApplicationContext("application.xml"); StudentDao dao = (StudentDao)ctx.getBean("studentDao"); dao.saveStudent(); Student stu = (Student) dao.queryStudent(5); System.out.println("学号：" + stu.getId() + ", 姓名：" + stu.getName()); List<Student> students = dao.queryStudentList(); for(Student stu:students){ System.out.println("学号：" + stu.getId() + ", 姓名：" + stu.getName()); } } }