Spring中使用JDBC做的增删改查
有三种方式使用JDBC。
1、使用JdbcTemplate类，实现使用JDBC ，参数是用object数组传递的
业务类：
public class UserDaoImpl implements UserDao{
// 定义一个Jdbc
private JdbcTemplate jt;
// 必须有set 方法，因为是通过set方法装配的
public void setJt(JdbcTemplate jt) {
this.jt = jt;
}
@Override
public void delete(int id) {
// TODO Auto-generated method stub
String sql="delete from user where id="+id;
int temp=this.jt.update(sql);
if(temp>0){
System.out.println("删除成功！");
}else{
System.out.println("删除失败！");
}
}
@Override
public void insert(User entity) {
// TODO Auto-generated method stub
String sql="insert into user(name,age,sex) values(?,?,?)";
Object obj[]={entity.getName(),entity.getAge(),entity.getSex()};
int temp=this.jt.update(sql,obj);
if(temp>0){
System.out.println("插入成功！");
}else{
System.out.println("插入失败！");
}
}
@Override
public List<User> selectAll() {
String sql="select * from user";
List list=this.jt.query(sql,new RowMapper(){
@Override
public Object mapRow(ResultSet rs, int row) throws SQLException {
// TODO Auto-generated method stub
User user=new User();
user.setId(rs.getInt("id"));
user.setName(rs.getString("name"));
user.setAge(rs.getInt("age"));
user.setSex(rs.getString("sex"));
return user;
}
});
System.out.println(list.size());
// TODO Auto-generated method stub
return list;
}
@Override
public User selectById(int id) {
// TODO Auto-generated method stub
String sql="select id,name,age,sex from user where id="+id;
User user=(User)jt.queryForObject(sql, new RowMapper(){
@Override
public Object mapRow(ResultSet rs, int arg1) throws SQLException {
// TODO Auto-generated method stub
User user=new User();
user.setId(rs.getInt("id"));
user.setName(rs.getString("name"));
user.setAge(rs.getInt("age"));
user.setSex(rs.getString("sex"));
return user;
}
});
return user;
}
@Override
public void update(User entity) {
// TODO Auto-generated method stub
String sql="update user set name=?,age=?,sex=? where id=?";
Object obj[]={entity.getName(),entity.getAge(),entity.getSex(),entity.getId()};
int temp=jt.update(sql,obj);
if(temp>0){
System.out.println("更新成功！");
}else{
System.out.println("更新失败！");
}
}
}
Xml中的部分代码：
<!-- 分散配置 -->
<context:property-placeholder location="jdbc.properties" />
<!-- c3p0的数据源，设置它是为了配置jbdcTemplate-->
<bean id="comboPooledDataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<!-- 驱动程序 -->
<property name="driverClass">
<value>${driverClass}</value>
</property>
<!-- 用户名 -->
<property name="user">
<value>${username}</value>
</property>
<!-- 密码 -->
<property name="password">
<value>${password}</value>
</property>
<!-- url -->
<property name="jdbcUrl">
<value>${url}</value>
</property>
<!-- 最大池数 -->
<property name="maxPoolSize">
<value>${c3p0.pool.max}</value>
</property>
<!-- 最小池数 -->
<property name="minPoolSize">
<value>${c3p0.pool.min}</value>
</property>
<!-- 初始化的池数 -->
<property name="initialPoolSize">
<value>${c3p0.pool.init}</value>
</property>
</bean>
<!-- 配置jdbcTemplate的bean ,设置它是为了设置业务bean中的jdbcTemplate参数-->
<bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
<constructor-arg ref="comboPooledDataSource" />
</bean>
<!-- 设置业务bean -->
<bean id="userDaoImpl" class="cn.csdn.dao.UserDaoImpl">
<property name="jt" ref="jdbcTemplate" />
</bean>
2、使用NamedParameterJdbcTemplate类，实现JDBC，参数是用Map集合传递的
业务类：
public class UserDaoImpl2 implements UserDao{
// 定义一个Jdbc
private NamedParameterJdbcTemplate npjt;
// 必须有set 方法，因为NamedParameterJdbcTemplate类是用set方法加载的
public void setNpjt(NamedParameterJdbcTemplate npjt){
this.npjt=npjt;
}
@Override
public void delete(int id) {
// TODO Auto-generated method stub
String sql="delete from user where id=:id";
Map<String,Object> map=new HashMap<String,Object>();
map.put("id", id);
int temp=this.npjt.update(sql,map);
if(temp>0){
System.out.println("删除成功！");
}else{
System.out.println("删除失败！");
}
}
@Override
public void insert(User entity) {
// TODO Auto-generated method stub
String sql="insert into user(name,age,sex) values(:name,:age,:sex)";
Map<String,Object> map=new HashMap<String,Object>();
map.put("name", entity.getName());
map.put("age", entity.getAge());
map.put("sex", entity.getSex());
int temp=npjt.update(sql, map);
if(temp>0){
System.out.println("插入成功！");
}else{
System.out.println("插入失败！");
}
}
//
//
//
@Override
public List<User> selectAll() {
String sql="select * from user";
// List list=this.npjt.queryForList(sql, new HashMap());
List list=npjt.query(sql, new HashMap(),new RowMapper(){
@Override
public Object mapRow(ResultSet rs, int arg1) throws SQLException {
// TODO Auto-generated method stub
User user=new User();
user.setId(rs.getInt("id"));
user.setName(rs.getString("name"));
user.setAge(rs.getInt("age"));
user.setSex(rs.getString("sex"));
return user;
}
});
System.out.println(list.size());
return list;
}
@Override
public User selectById(int id) {
// TODO Auto-generated method stub
String sql="select id,name,age,sex from user where id=1";
Map<String,Object> map=new HashMap<String,Object>();
map.put("id", id);
User user=(User)npjt.queryForObject(sql, map, new RowMapper(){
@Override
public Object mapRow(ResultSet rs, int arg1) throws SQLException {
User user=new User();
user.setId(rs.getInt("id"));
user.setName(rs.getString("name"));
user.setAge(rs.getInt("age"));
user.setSex(rs.getString("sex"));
return user;
}
});
return user;
}
//
@Override
public void update(User entity) {
// TODO Auto-generated method stub
String sql="update user set name=:name,age=:age,sex=:sex where id=:id";
Map<String,Object> map=new HashMap<String,Object>();
map.put("name", entity.getName());
map.put("age", entity.getAge());
map.put("sex", entity.getSex());
map.put("id", entity.getId());
int temp=npjt.update(sql, map);
if(temp>0){
System.out.println("更新成功！");
}else{
System.out.println("更新失败！");
}
}
}
xml中的代码：
<!-- 分散配置 -->
<context:property-placeholder location="jdbc.properties" />
<!-- c3p0的数据源，设置它是为了配置jbdcTemplate-->
<bean id="comboPooledDataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<!-- 驱动程序 -->
<property name="driverClass">
<value>${driverClass}</value>
</property>
<!-- 用户名 -->
<property name="user">
<value>${username}</value>
</property>
<!-- 密码 -->
<property name="password">
<value>${password}</value>
</property>
<!-- url -->
<property name="jdbcUrl">
<value>${url}</value>
</property>
<!-- 最大池数 -->
<property name="maxPoolSize">
<value>${c3p0.pool.max}</value>
</property>
<!-- 最小池数 -->
<property name="minPoolSize">
<value>${c3p0.pool.min}</value>
</property>
<!-- 初始化的池数 -->
<property name="initialPoolSize">
<value>${c3p0.pool.init}</value>
</property>
</bean>
<!-- 配置jdbcTemplate的bean ,设置它是为了设置业务bean中的jdbcTemplate参数-->
<bean id="namedParameterJdbcTemplate" class="org.springframework.jdbc.core.namedparam.NamedParameterJdbcTemplate">
<constructor-arg ref="comboPooledDataSource"/>
</bean>
<!-- 设置业务bean -->
<bean id="userDaoImpl" class="cn.csdn.dao.UserDaoImpl2">
<property name="npjt" ref="namedParameterJdbcTemplate" />
</bean>
3、使用SimpleJdbcTemplate类，实现JDBC，参数是用可变参数传递的
业务类：
public class UserDaoImpl3 implements UserDao{
// 定义一个Jdbc
private SimpleJdbcTemplate sjt;
// 必须有set 方法
public void setSjt(SimpleJdbcTemplate sjt){
this.sjt=sjt;
}
@Override
public void delete(int id) {
// TODO Auto-generated method stub
String sql="delete from user where id=?";
int temp=this.sjt.update(sql, id);
if(temp>0){
System.out.println("删除成功！");
}else{
System.out.println("删除失败！");
}
}
@Override
public void insert(User entity) {
// TODO Auto-generated method stub
String sql="insert into user(name,age,sex) values(?,?,?)";
int temp=sjt.update(sql,entity.getName(),entity.getAge(),entity.getSex());
if(temp>0){
System.out.println("插入成功！");
}else{
System.out.println("插入失败！");
}
}
@Override
public List<User> selectAll() {
String sql="select * from user";
List list=this.sjt.queryForList(sql);
System.out.println(list.size());
return list;
}
@Override
public User selectById(int id) {
// TODO Auto-generated method stub
String sql="select id,name,age,sex from user where id=?";
User user=(User) sjt.queryForObject(sql, new ParameterizedRowMapper() {
@Override
public Object mapRow(ResultSet rs, int arg1) throws SQLException {
User user=new User();
user.setId(rs.getInt("id"));
user.setName(rs.getString("name"));
user.setAge(rs.getInt("age"));
user.setSex(rs.getString("sex"));
return user;
}
}, id);
return user;
}
@Override
public void update(User entity) {
// TODO Auto-generated method stub
/**第一种方法*/
// String sql="update user set name=?,age=?,sex=? where id=?";
// int temp=sjt.update(sql, entity.getName(),entity.getAge(),entity.getSex(),entity.getId());
/**第二种方法*/
String sql="update user set name=:name,age=:age,sex=:sex where id=:id";
Map<String,Object> map=new HashMap<String,Object>();
map.put("name", entity.getName());
map.put("age", entity.getAge());
map.put("sex", entity.getSex());
map.put("id", entity.getId());
int temp=sjt.update(sql, map);
if(temp>0){
System.out.println("更新成功！");
}else{
System.out.println("更新失败！");
}
}
}
xml中的部分代码：
<!-- 分散配置 -->
<context:property-placeholder location="jdbc.properties" />
<!-- c3p0的数据源，设置它是为了配置jbdcTemplate-->
<bean id="comboPooledDataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<!-- 驱动程序 -->
<property name="driverClass">
<value>${driverClass}</value>
</property>
<!-- 用户名 -->
<property name="user">
<value>${username}</value>
</property>
<!-- 密码 -->
<property name="password">
<value>${password}</value>
</property>
<!-- url -->
<property name="jdbcUrl">
<value>${url}</value>
</property>
<!-- 最大池数 -->
<property name="maxPoolSize">
<value>${c3p0.pool.max}</value>
</property>
<!-- 最小池数 -->
<property name="minPoolSize">
<value>${c3p0.pool.min}</value>
</property>
<!-- 初始化的池数 -->
<property name="initialPoolSize">
<value>${c3p0.pool.init}</value>
</property>
</bean>
<!-- 配置jdbcTemplate的bean ,设置它是为了设置业务bean中的jdbcTemplate参数-->
<bean id="simpleJdbcTemplate" class="org.springframework.jdbc.core.simple.SimpleJdbcTemplate">
<constructor-arg ref="comboPooledDataSource"/>
</bean>
<!-- 设置业务bean -->
<bean id="userDaoImpl" class="cn.csdn.dao.UserDaoImpl3">
<property name="sjt" ref="simpleJdbcTemplate" />
</bean>