1、Dao
package com.dao;
import static org.hamcrest.CoreMatchers.nullValue;
import java.util.List;
import org.springframework.jdbc.core.support.JdbcDaoSupport;
import com.beans.Student;
public class StudentDaoImpl extends JdbcDaoSupport implements IStudentDao {
@Override
public void insertStudent(Student student) {
String sql = "insert into student(id,name,age) values(?,?,?)";
this.getJdbcTemplate().update(sql, student.getId(), student.getName(), student.getAge());
}
@Override
public void deleteById(Integer id) {
String sql = "delete from student where id=?";
this.getJdbcTemplate().update(sql, id);
}
@Override
public void updatetudent(Student student) {
String sql = "update student set name=?,age=?,id=?";
this.getJdbcTemplate().update(sql, student.getName(),student.getAge(),student.getId());
}
@Override
public List<String> selectAllStudentsNames() {
String sql = "select name from student";
List<String> result = this.getJdbcTemplate().queryForList(sql , String.class);
return result;
}
@Override
public String selectStudentNameById(Integer id) {
String sql = "select name from student where id=?";
String result = this.getJdbcTemplate().queryForObject(sql, String.class, id);
return result;
}
@Override
public List<Student> selectAllStudents() {
String sql = "select id, name, age from student";
List<Student> students = this.getJdbcTemplate().query(sql, new StudentRowMapper());
return students;
}
@Override
public Student selectStudentById(Integer id) {
/*
* 方法1
* String sql1 = "select name from student where id=?"; String name =
* this.getJdbcTemplate().queryForObject(sql1 , String.class, id); String sql2 =
* "select age from student where id=?"; Integer age =
* this.getJdbcTemplate().queryForObject(sql2 , Integer.class, id); Student
* student = new Student(id, name, age);
*
*/
//方法2
String sql = "select id, name, age from student where id=?";
Student student = this.getJdbcTemplate().queryForObject(sql, new StudentRowMapper(), id);
return student;
}
}
2、applicationContext.xml（配置方式1）
<?xml version="1.0" encoding="UTF-8"?><!-- 注册dataSource:spring内部连接池 -->
<!--
<bean id="myDataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="com.mysql.jdbc.Driver"/>
<property name="url" value="jdbc:mysql://127.0.0.1:3306/test"/>
<property name="username" value="duchao"/>
<property name="password" value="123456"/>
</bean>
-->
<!-- 注册dataSource:DBCP连接池 -->
<!--
<bean id="myDataSource" class="org.apache.commons.dbcp.BasicDataSource">
<property name="driverClassName" value="com.mysql.jdbc.Driver"/>
<property name="url" value="jdbc:mysql://127.0.0.1:3306/test"/>
<property name="username" value="duchao"/>
<property name="password" value="123456"/>
</bean>
-->
<!-- 注册dataSource:c3p0连接池 -->
<!--
<bean id="myDataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="driverClass" value="com.mysql.jdbc.Driver"/>
<property name="jdbcUrl" value="jdbc:mysql://127.0.0.1:3306/test"/>
<property name="user" value="duchao"/>
<property name="password" value="123456"/>
</bean>
-->
<!-- 注册dataSource:c3p0连接池 -->
<bean id="myDataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="driverClass" value="${jdbc.driver}"/>
<property name="jdbcUrl" value="${jdbc.url}"/>
<property name="user" value="${jdbc.user}"/>
<property name="password" value="${jdbc.password}"/>
</bean>
<!-- 注册jdbc.properties :方式1-->
<!--
<bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="location" value="classpath:jdbc.properties"/>
</bean>
-->
<!-- 注册jdbc.properties :方式2-->
<context:property-placeholder location="classpath:jdbc.properties"/>
<!-- 注册jdbcTemplate -->
<bean id="myJdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
<property name="dataSource" ref="myDataSource"/>
</bean>
<!-- 注册dao -->
<bean id="myDao" class="com.dao.StudentDaoImpl">
<property name="jdbcTemplate" ref="myJdbcTemplate"/>
</bean>
<!-- 注册service -->
<bean id="studentService" class="com.service.StudentServiceImpl">
<property name="dao" ref="myDao"/>
</bean>
<!-- 注册dataSource:spring内部连接池 -->
<!--
<bean id="myDataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="com.mysql.jdbc.Driver"/>
<property name="url" value="jdbc:mysql://127.0.0.1:3306/test"/>
<property name="username" value="duchao"/>
<property name="password" value="123456"/>
</bean>
-->
<!-- 注册dataSource:DBCP连接池 -->
<!--
<bean id="myDataSource" class="org.apache.commons.dbcp.BasicDataSource">
<property name="driverClassName" value="com.mysql.jdbc.Driver"/>
<property name="url" value="jdbc:mysql://127.0.0.1:3306/test"/>
<property name="username" value="duchao"/>
<property name="password" value="123456"/>
</bean>
-->
<!-- 注册dataSource:c3p0连接池 -->
<!--
<bean id="myDataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="driverClass" value="com.mysql.jdbc.Driver"/>
<property name="jdbcUrl" value="jdbc:mysql://127.0.0.1:3306/test"/>
<property name="user" value="duchao"/>
<property name="password" value="123456"/>
</bean>
-->
<!-- 注册dataSource:c3p0连接池 -->
<bean id="myDataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="driverClass" value="${jdbc.driver}"/>
<property name="jdbcUrl" value="${jdbc.url}"/>
<property name="user" value="${jdbc.user}"/>
<property name="password" value="${jdbc.password}"/>
</bean>
<!-- 注册jdbc.properties :方式1-->
<!--
<bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="location" value="classpath:jdbc.properties"/>
</bean>
-->
<!-- 注册jdbc.properties :方式2-->
<context:property-placeholder location="classpath:jdbc.properties"/>
<!-- 注册jdbcTemplate -->
<!--
<bean id="myJdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
<property name="dataSource" ref="myDataSource"/>
</bean>
-->
***<!-- 注册dao -->
<bean id="myDao" class="com.dao.StudentDaoImpl">
<property name="dataSource" ref="myDataSource"/>
</bean>***
<!-- 注册service -->
<bean id="studentService" class="com.service.StudentServiceImpl">
<property name="dao" ref="myDao"/>
</bean>
3、class StudentRowMapper
package com.dao;
import java.sql.ResultSet;
import java.sql.SQLException;
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import org.springframework.jdbc.core.RowMapper;
import com.beans.Student;
public class StudentRowMapper implements RowMapper {
//rs代表每一行记录，当查询出总的结果集后，框架会自动遍历这个结果集，每一次的遍历的一行数据都会被存放到
//这个方法的rs参数中。也就是说，这里的rs代表的是每一行数据，并非所有查询结果。换个角度来说，只要能执行这个方法，
//就说明rs不会是空的
@Override
public Student mapRow(ResultSet rs, int rowNum) throws SQLException {
Student student = new Student();
student.setId(rs.getInt("id"));
student.setName(rs.getString("name"));
student.setAge(rs.getInt("age"));
return student;
}
}
