Spring 对DAO 的支持
Posted kika
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第一节：Spring 对JDBC 的支持
1，配置数据源dbcp；
2，使用JdbcTemplate；
3，JdbcDaoSupport 的使用；
4，NamedParameterJdbcTemplate 的使用；支持命名参数变量；
org.springframework.jdbc.core.namedparam.NamedParameterJdbcTemplate
1，使用JdbcTemplate；
T.java:
1 package com.wishwzp.test; 2 3 import java.util.List; 4 5 import org.junit.Before; 6 import org.junit.Test; 7 import org.springframework.context.ApplicationContext; 8 import org.springframework.context.support.ClassPathXmlApplicationContext; 9 10 import com.wishwzp.model.Student; 11 import com.wishwzp.service.StudentService; 12 13 14 public class T { 15 16 private ApplicationContext ac; 17 18 @Before 19 public void setUp() throws Exception { 20 ac=new ClassPathXmlApplicationContext("beans.xml"); 21 } 22 23 //添加 24 @Test 25 public void addStudent() { 26 StudentService studentService=(StudentService)ac.getBean("studentService"); 27 int addNums=studentService.addStudent(new Student("王五", 1)); 28 if(addNums==1){ 29 System.out.println("添加成功"); 30 } 31 } 32 33 //更新 34 @Test 35 public void updateStudent() { 36 StudentService studentService=(StudentService)ac.getBean("studentService"); 37 int updateNums=studentService.updateStudent(new Student(8,"王五2", 2)); 38 if(updateNums==1){ 39 System.out.println("更新成功"); 40 } 41 } 42 43 //删除 44 @Test 45 public void deleteStudent() { 46 StudentService studentService=(StudentService)ac.getBean("studentService"); 47 int deleteNums=studentService.deleteStudent(8); 48 if(deleteNums==1){ 49 System.out.println("删除成功"); 50 } 51 } 52 53 //查找 54 @Test 55 public void findStudents() { 56 StudentService studentService=(StudentService)ac.getBean("studentService"); 57 List<Student> studentList=studentService.findStudents(); 58 for(Student student:studentList){ 59 System.out.println(student); 60 } 61 } 62 63 }
beans.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" 4 xmlns:aop="http://www.springframework.org/schema/aop" 5 xmlns:context="http://www.springframework.org/schema/context" 6 xsi:schemaLocation="http://www.springframework.org/schema/beans 7 http://www.springframework.org/schema/beans/spring-beans.xsd 8 http://www.springframework.org/schema/aop 9 http://www.springframework.org/schema/aop/spring-aop.xsd 10 http://www.springframework.org/schema/context 11 http://www.springframework.org/schema/context/spring-context.xsd"> 12 13 <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close"> 14 <property name="driverClassName" value="${jdbc.driverClassName}"/> 15 <property name="url" value="${jdbc.url}"/> 16 <property name="username" value="${jdbc.username}"/> 17 <property name="password" value="${jdbc.password}"/> 18 </bean> 19 20 <context:property-placeholder location="jdbc.properties"/> 21 22 <bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate"> 23 <property name="dataSource" ref="dataSource"></property> 24 </bean> 25 26 27 <bean id="studentDao" class="com.wishwzp.dao.impl.StudentDaoImpl"> 28 <property name="jdbcTemplate" ref="jdbcTemplate"></property> 29 </bean> 30 31 <bean id="studentService" class="com.wishwzp.service.impl.StudentServiceImpl"> 32 <property name="studentDao" ref="studentDao"></property> 33 </bean> 34 35 </beans>
jdbc.properties:
1 jdbc.driverClassName=com.mysql.jdbc.Driver 2 jdbc.url=jdbc:mysql://localhost:3306/db_spring?characterEncoding=utf-8 3 jdbc.username=root 4 jdbc.password=root
StudentServiceImpl.java:
1 package com.wishwzp.service.impl; 2 3 import java.util.List; 4 5 import com.wishwzp.dao.StudentDao; 6 import com.wishwzp.model.Student; 7 import com.wishwzp.service.StudentService; 8 9 public class StudentServiceImpl implements StudentService{ 10 11 private StudentDao studentDao; 12 13 public void setStudentDao(StudentDao studentDao) { 14 this.studentDao = studentDao; 15 } 16 17 @Override 18 public int addStudent(Student student) { 19 return studentDao.addStudent(student); 20 } 21 22 @Override 23 public int updateStudent(Student student) { 24 return studentDao.updateStudent(student); 25 } 26 27 @Override 28 public int deleteStudent(int id) { 29 return studentDao.deleteStudent(id); 30 } 31 32 @Override 33 public List<Student> findStudents() { 34 return studentDao.findStudents(); 35 } 36 37 }
StudentService.java:
1 package com.wishwzp.service; 2 3 import java.util.List; 4 5 import com.wishwzp.model.Student; 6 7 public interface StudentService { 8 9 public int addStudent(Student student); 10 11 public int updateStudent(Student student); 12 13 public int deleteStudent(int id); 14 15 public List<Student> findStudents(); 16 }
StudentDaoImpl.java:
1 package com.wishwzp.dao.impl; 2 3 import java.sql.ResultSet; 4 import java.sql.SQLException; 5 import java.util.ArrayList; 6 import java.util.List; 7 8 import org.springframework.jdbc.core.JdbcTemplate; 9 import org.springframework.jdbc.core.RowCallbackHandler; 10 11 import com.wishwzp.dao.StudentDao; 12 import com.wishwzp.model.Student; 13 14 public class StudentDaoImpl implements StudentDao{ 15 16 private JdbcTemplate jdbcTemplate; 17 18 public void setJdbcTemplate(JdbcTemplate jdbcTemplate) { 19 this.jdbcTemplate = jdbcTemplate; 20 } 21 22 @Override 23 public int addStudent(Student student) { 24 String sql="insert into t_student values(null,?,?)"; 25 Object []params=new Object[]{student.getName() , student.getAge()}; 26 int addjdbcTemplate = jdbcTemplate.update(sql,params); 27 return addjdbcTemplate; 28 } 29 30 @Override 31 public int updateStudent(Student student) { 32 String sql="update t_student set name=?,age=? where id=?"; 33 Object []params=new Object[]{student.getName() , student.getAge() , student.getId()}; 34 int updatejdbcTemplate = jdbcTemplate.update(sql,params); 35 return updatejdbcTemplate; 36 } 37 38 @Override 39 public int deleteStudent(int id) { 40 String sql="delete from t_student where id=?"; 41 Object []params=new Object[]{ id }; 42 int deletejdbcTemplate = jdbcTemplate.update(sql,params); 43 return deletejdbcTemplate; 44 } 45 46 @Override 47 public List<Student> findStudents() { 48 String sql="select * from t_student"; 49 final List<Student> studentList=new ArrayList<Student>(); 50 jdbcTemplate.query(sql, new RowCallbackHandler(){ 51 52 @Override 53 public void processRow(ResultSet rs) throws SQLException { 54 Student student=new Student(); 55 student.setId(rs.getInt("id")); 56 student.setName(rs.getString("name")); 57 student.setAge(rs.getInt("age")); 58 studentList.add(student); 59 } 60 }); 61 return studentList; 62 } 63 64 }
StudentDao.java:
1 package com.wishwzp.dao; 2 3 import java.util.List; 4 5 import com.wishwzp.model.Student; 6 7 public interface StudentDao { 8 9 public int addStudent(Student student); 10 11 public int updateStudent(Student student); 12 13 public int deleteStudent(int id); 14 15 public List<Student> findStudents(); 16 }
Student.java:
1 package com.wishwzp.model; 2 3 public class Student { 4 5 private int id; 6 private String name; 7 private int age; 8 9 public Student() { 10 super(); 11 // TODO Auto-generated constructor stub 12 } 13 14 public Student(String name, int age) { 15 super(); 16 this.name = name; 17 this.age = age; 18 } 19 20 public Student(int id, String name, int age) { 21 super(); 22 this.id = id; 23 this.name = name; 24 this.age = age; 25 } 26 27 28 public int getId() { 29 return id; 30 } 31 public void setId(int id) { 32 this.id = id; 33 } 34 public String getName() { 35 return name; 36 } 37 public void setName(String name) { 38 this.name = name; 39 } 40 public int getAge() { 41 return age; 42 } 43 public void setAge(int age) { 44 this.age = age; 45 } 46 47 @Override 48 public String toString() { 49 return "Student [id=" + id + ", name=" + name + ", age=" + age + "]"; 50 } 51 52 }
运行结果就是每一个对数据库的CRUD
3，JdbcDaoSupport 的使用；
T.java:
1 package com.wishwzp.test; 2 3 import java.util.List; 4 5 import org.junit.Before; 6 import org.junit.Test; 7 import org.springframework.context.ApplicationContext; 8 import org.springframework.context.support.ClassPathXmlApplicationContext; 9 10 import com.wishwzp.model.Student; 11 import com.wishwzp.service.StudentService; 12 13 14 public class T { 15 16 private ApplicationContext ac; 17 18 @Before 19 public void setUp() throws Exception { 20 ac=new ClassPathXmlApplicationContext("beans.xml"); 21 } 22 23 @Test 24 public void addStudent() { 25 StudentService studentService=(StudentService)ac.getBean("studentService"); 26 int addNums=studentService.addStudent(new Student("王五", 1)); 27 if(addNums==1){ 28 System.out.println("添加成功"); 29 } 30 } 31 32 @Test 33 public void updateStudent() { 34 StudentService studentService=(StudentService)ac.getBean("studentService"); 35 int updateNums=studentService.updateStudent(new Student(4,"王五2", 2)); 36 if(updateNums==1){ 37 System.out.println("更新成功"); 38 } 39 } 40 41 @Test 42 public void deleteStudent() { 43 StudentService studentService=(StudentService)ac.getBean("studentService"); 44 int deleteNums=studentService.deleteStudent(10); 45 if(deleteNums==1){ 46 System.out.println("删除成功"); 47 } 48 } 49 50 @Test 51 public void findStudents() { 52 StudentService studentService=(StudentService)ac.getBean("studentService"); 53 List<Student> studentList=studentService.findStudents(); 54 for(Student student:studentList){ 55 System.out.println(student); 56 } 57 } 58 59 60 61 }
beans.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" 4 xmlns:aop="http://www.springframework.org/schema/aop" 5 xmlns:context="http://www.springframework.org/schema/context" 6 xsi:schemaLocation="http://www.springframework.org/schema/beans 7 http://www.springframework.org/schema/beans/spring-beans.xsd 8 http://www.springframework.org/schema/aop 9 http://www.springframework.org/schema/aop/spring-aop.xsd 10 http://www.springframework.org/schema/context 11 http://www.springframework.org/schema/context/spring-context.xsd"> 12 13 <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close"> 14 <property name="driverClassName" value="${jdbc.driverClassName}"/> 15 <property name="url" value="${jdbc.url}"/> 16 <property name="username" value="${jdbc.username}"/> 17 <property name="password" value="${jdbc.password}"/> 18 </bean> 19 20 <context:property-placeholder location="jdbc.properties"/> 21 22 23 24 <bean id="studentDao" class="com.wishwzp.dao.impl.StudentDaoImpl"> 25 <property name="dataSource" ref="dataSource"></property> 26 </bean> 27 28 <bean id="studentService" class="com.wishwzp.service.impl.StudentServiceImpl"> 29 <property name="studentDao" ref="studentDao"></property> 30 </bean> 31 32 </beans>
jdbc.properties:
1 jdbc.driverClassName=com.mysql.jdbc.Driver 2 jdbc.url=jdbc:mysql://localhost:3306/db_spring?characterEncoding=utf-8 3 jdbc.username=root 4 jdbc.password=root
StudentServiceImpl.java:
1 package com.wishwzp.service.impl; 2 3 import java.util.List; 4 5 import com.wishwzp.dao.StudentDao; 6 import com.wishwzp.model.Student; 7 import com.wishwzp.service.StudentService; 8 9 public class StudentServiceImpl implements StudentService{ 10 11 private StudentDao studentDao; 12 13 public void setStudentDao(StudentDao studentDao) { 14 this.studentDao = studentDao; 15 } 16 17 @Override 18 public int addStudent(Student student) { 19 return studentDao.addStudent(student); 20 } 21 22 @Override 23 public int updateStudent(Student student) { 24 return studentDao.updateStudent(student); 25 } 26 27 @Override 28 public int deleteStudent(int id) { 29 return studentDao.deleteStudent(id); 30 } 31 32 @Override 33 public List<Student> findStudents() { 34 return studentDao.findStudents(); 35 } 36 37 38 39 }
StudentService.java:
1 package com.wishwzp.service; 2 3 import java.util.List; 4 5 import com.wishwzp.model.Student; 6 7 public interface StudentService { 8 9 public int addStudent(Student student); 10 11 public int updateStudent(Student student); 12 13 public int deleteStudent(int id); 14 15 public List<Student> findStudents(); 16 }
StudentDaoImpl.java:
1 package com.wishwzp.dao.impl; 2 3 import java.sql.ResultSet; 4 import java.sql.SQLException; 5 import java.util.ArrayList; 6 import java.util.List; 7 8 import org.springframework.jdbc.core.JdbcTemplate; 9 import org.springframework.jdbc.core.RowCallbackHandler; 10 import org.springframework.jdbc.core.support.JdbcDaoSupport; 11 12 import com.wishwzp.dao.StudentDao; 13 import com.wishwzp.model.Student; 14 15 public class StudentDaoImpl extends JdbcDaoSupport implements StudentDao{ 16 17 @Override 18 public int addStudent(Student student) { 19 String sql="insert into t_student values(null,?,?)"; 20 Object []params=new Object[]{student.getName(),student.getAge()}; 21 int addgetJdbcTemplate = getJdbcTemplate().update(sql,params); 22 return addgetJdbcTemplate; 23 //return this.getJdbcTemplate().update(sql,params); 24 } 25 26 @Override 27 public int updateStudent(Student student) { 28 String sql="update t_student set name=?,age=? where id=?"; 29 Object []params=new Object[]{student.getName() , student.getAge() , student.getId()}; 30 int updategetJdbcTemplate = getJdbcTemplate().update(sql,params); 31 return updategetJdbcTemplate; 32 //return this.getJdbcTemplate().update(sql,params); 33 } 34 35 @Override 36 public int deleteStudent(int id) { 37 String sql="delete from t_student where id=?"; 38 Object []params=new Object[]{id}; 39 int deletegetJdbcTemplate = getJdbcTemplate().update(sql,params); 40 return deletegetJdbcTemplate; 41 //return this.getJdbcTemplate().update(sql,params); 42 } 43 44 @Override 45 public List<Student> findStudents() { 46 String sql="select * from t_student"; 47 final List<Student> studentList=new ArrayList<Student>(); 48 this.getJdbcTemplate().query(sql, new RowCallbackHandler(){ 49 50 @Override 51 public void processRow(ResultSet rs) throws SQLException { 52 Student student=new Student(); 53 student.setId(rs.getInt("id")); 54 student.setName(rs.getString("name")); 55 student.setAge(rs.getInt("age")); 56 studentList.add(student); 57 } 58 59 }); 60 return studentList; 61 } 62 63 }
StudentDao.java:
1 package com.wishwzp.dao; 2 3 import java.util.List; 4 5 import com.wishwzp.model.Student; 6 7 public interface StudentDao { 8 9 public int addStudent(Student student); 10 11 public int updateStudent(Student student); 12 13 public int deleteStudent(int id); 14 15 public List<Student> findStudents(); 16 }
Student.java:
1 package com.wishwzp.model; 2 3 public class Student { 4 5 private int id; 6 private String name; 7 private int age; 8 9 10 11 public Student() { 12 super(); 13 // TODO Auto-generated constructor stub 14 } 15 16 17 public Student(String name, int age) { 18 super(); 19 this.name = name; 20 this.age = age; 21 } 22 23 24 25 public Student(int id, String name, int age) { 26 super(); 27 this.id = id; 28 this.name = name; 29 this.age = age; 30 } 31 32 33 public int getId() { 34 return id; 35 } 36 public void setId(int id) { 37 this.id = id; 38 } 39 public String getName() { 40 return name; 41 } 42 public void setName(String name) { 43 this.name = name; 44 } 45 public int getAge() { 46 return age; 47 } 48 public void setAge(int age) { 49 this.age = age; 50 } 51 52 53 @Override 54 public String toString() { 55 return "Student [id=" + id + ", name=" + name + ", age=" + age + "]"; 56 } 57 58 59 60 }
运行结果就是每一个对数据库的CRUD
4，NamedParameterJdbcTemplate 的使用；支持命名参数变量；
T.java:
1 package com.wishwzp.test; 2 3 import java.util.List; 4 5 import org.junit.Before; 6 import org.junit.Test; 7 import org.springframework.context.ApplicationContext; 8 import org.springframework.context.support.ClassPathXmlApplicationContext; 9 10 import com.wishwzp.model.Student; 11 import com.wishwzp.service.StudentService; 12 13 14 public class T { 15 16 private ApplicationContext ac; 17 18 @Before 19 public void setUp() throws Exception { 20 ac=new ClassPathXmlApplicationContext("beans.xml"); 21 } 22 23 @Test 24 public void addStudent() { 25 StudentService studentService=(StudentService)ac.getBean("studentService"); 26 int addNums=studentService.addStudent(new Student("王五", 1)); 27 if(addNums==1){ 28 System.out.println("添加成功"); 29 } 30 } 31 32 @Test 33 public void updateStudent() { 34 StudentService studentService=(StudentService)ac.getBean("studentService"); 35 int updateNums=studentService.updateStudent(new Student(11,"王五2", 2)); 36 if(updateNums==1){ 37 System.out.println("更新成功"); 38 } 39 } 40 41 @Test 42 public void deleteStudent() { 43 StudentService studentService=(StudentService)ac.getBean("studentService"); 44 int deleteNums=studentService.deleteStudent(11); 45 if(deleteNums==1){ 46 System.out.println("删除成功"); 47 } 48 } 49 50 @Test 51 public void findStudents() { 52 StudentService studentService=(StudentService)ac.getBean("studentService"); 53 List<Student> studentList=studentService.findStudents(); 54 for(Student student:studentList){ 55 System.out.println(student); 56 } 57 } 58 59 60 61 }
beans.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" 4 xmlns:aop="http://www.springframework.org/schema/aop" 5 xmlns:context="http://www.springframework.org/schema/context" 6 xsi:schemaLocation="http://www.springframework.org/schema/beans 7 http://www.springframework.org/schema/beans/spring-beans.xsd 8 http://www.springframework.org/schema/aop 9 http://www.springframework.org/schema/aop/spring-aop.xsd 10 http://www.springframework.org/schema/context 11 http://www.springframework.org/schema/context/spring-context.xsd"> 12 13 <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close"> 14 <property name="driverClassName" value="${jdbc.driverClassName}"/> 15 <property name="url" value="${jdbc.url}"/> 16 <property name="username" value="${jdbc.username}"/> 17 <property name="password" value="${jdbc.password}"/> 18 </bean> 19 20 <context:property-placeholder location="jdbc.properties"/> 21 22 <bean id="namedParameterJdbcTemplate" class="org.springframework.jdbc.core.namedparam.NamedParameterJdbcTemplate"> 23 <constructor-arg ref="dataSource"></constructor-arg> 24 </bean> 25 26 27 <bean id="studentDao" class="com.wishwzp.dao.impl.StudentDaoImpl"> 28 <property name="namedParameterJdbcTemplate" ref="namedParameterJdbcTemplate"></property> 29 </bean> 30 31 <bean id="studentService" class="com.wishwzp.service.impl.StudentServiceImpl"> 32 <property name="studentDao" ref="studentDao"></property> 33 </bean> 34 35 </beans>
jdbc.properties:
1 jdbc.driverClassName=com.mysql.jdbc.Driver 2 jdbc.url=jdbc:mysql://localhost:3306/db_spring?characterEncoding=utf-8 3 jdbc.username=root 4 jdbc.password=root
StudentServiceImpl.java:
1 package com.wishwzp.service.impl; 2 3 import java.util.List; 4 5 import com.wishwzp.dao.StudentDao; 6 import com.wishwzp.model.Student; 7 import com.wishwzp.service.StudentService; 8 9 public class StudentServiceImpl implements StudentService{ 10 11 private StudentDao studentDao; 12 13 public void setStudentDao(StudentDao studentDao) { 14 this.studentDao = studentDao; 15 } 16 17 @Override 18 public int addStudent(Student student) { 19 return studentDao.addStudent(student); 20 } 21 22 @Override 23 public int updateStudent(Student student) { 24 return studentDao.updateStudent(student); 25 } 26 27 @Override 28 public int deleteStudent(int id) { 29 return studentDao.deleteStudent(id); 30 } 31 32 @Override 33 public List<Student> findStudents() { 34 return studentDao.findStudents(); 35 } 36 37 38 39 }
StudentService.java:
1 package com.wishwzp.service; 2 3 import java.util.List; 4 5 import com.wishwzp.model.Student; 6 7 public interface StudentService { 8 9 public int addStudent(Student student); 10 11 public int updateStudent(Student student); 12 13 public int deleteStudent(int id); 14 15 public List<Student> findStudents(); 16 }
StudentDaoImpl.java:
1 package com.wishwzp.dao.impl; 2 3 import java.sql.ResultSet; 4 import java.sql.SQLException; 5 import java.util.ArrayList; 6 import java.util.List; 7 8 import org.springframework.jdbc.core.JdbcTemplate; 9 import org.springframework.jdbc.core.RowCallbackHandler; 10 import org.springframework.jdbc.core.namedparam.MapSqlParameterSource; 11 import org.springframework.jdbc.core.namedparam.NamedParameterJdbcTemplate; 12 13 import com.wishwzp.dao.StudentDao; 14 import com.wishwzp.model.Student; 15 16 public class StudentDaoImpl implements StudentDao{ 17 18 private NamedParameterJdbcTemplate namedParameterJdbcTemplate; 19 20 public void setNamedParameterJdbcTemplate( 21 NamedParameterJdbcTemplate namedParameterJdbcTemplate) { 22 this.namedParameterJdbcTemplate = namedParameterJdbcTemplate; 23 } 24 25 @Override 26 public int addStudent(Student student) { 27 String sql="insert into t_student values(null,:name,:age)"; 28 MapSqlParameterSource sps=new MapSqlParameterSource(); 29 sps.addValue("name", student.getName()); 30 sps.addValue("age", student.getAge()); 31 return namedParameterJdbcTemplate.update(sql,sps); 32 } 33 34 @Override 35 public int updateStudent(Student student) { 36 String sql="update t_student set name=:name,age=:age where id=:id"; 37 MapSqlParameterSource sps=new MapSqlParameterSource(); 38 sps.addValue("name", student.getName()); 39 sps.addValue("age", student.getAge()); 40 sps.addValue("id", student.getId()); 41 return namedParameterJdbcTemplate.update(sql,sps); 42 } 43 44 @Override 45 public int deleteStudent(int id) { 46 String sql="delete from t_student where id=:id"; 47 MapSqlParameterSource sps=new MapSqlParameterSource(); 48 sps.addValue("id", id); 49 return namedParameterJdbcTemplate.update(sql,sps); 50 } 51 52 @Override 53 public List<Student> findStudents() { 54 String sql="select * from t_student"; 55 final List<Student> studentList=new ArrayList<Student>(); 56 namedParameterJdbcTemplate.query(sql, new RowCallbackHandler(){ 57 58 @Override 59 public void processRow(ResultSet rs) throws SQLException { 60 Student student=new Student(); 61 student.setId(rs.getInt("id")); 62 student.setName(rs.getString("name")); 63 student.setAge(rs.getInt("age")); 64 studentList.add(student); 65 } 66 67 }); 68 return studentList; 69 } 70 71 }
StudentDao.java:
1 package com.wishwzp.dao; 2 3 import java.util.List; 4 5 import com.wishwzp.model.Student; 6 7 public interface StudentDao { 8 9 public int addStudent(Student student); 10 11 public int updateStudent(Student student); 12 13 public int deleteStudent(int id); 14 15 public List<Student> findStudents(); 16 }
Student.java:
1 package com.wishwzp.model; 2 3 public class Student { 4 5 private int id; 6 private String name; 7 private int age; 8 9 10 11 public Student() { 12 super(); 13 // TODO Auto-generated constructor stub 14 } 15 16 17 public Student(String name, int age) { 18 super(); 19 this.name = name; 20 this.age = age; 21 } 22 23 24 25 public Student(int id, String name, int age) { 26 super(); 27 this.id = id; 28 this.name = name; 29 this.age = age; 30 } 31 32 33 public int getId() { 34 return id; 35 } 36 public void setId(int id) { 37 this.id = id; 38 } 39 public String getName() { 40 return name; 41 } 42 public void setName(String name) { 43 this.name = name; 44 } 45 public int getAge() { 46 return age; 47 } 48 public void setAge(int age) { 49 this.age = age; 50 } 51 52 53 @Override 54 public String toString() { 55 return "Student [id=" + id + ", name=" + name + ", age=" + age + "]"; 56 } 57 58 59 60 }
运行结果就是每一个对数据库的CRUD
第二节：Spring 对Hibernate 的支持
后面Spring 整合Hibernate 的时候会提的。
以上是关于Spring 对DAO 的支持的主要内容，如果未能解决你的问题，请参考以下文章