spring框架 使用 JdbcTemplate 对数据进行增删改查

user=LF
password=LF
jdbcUrl=jdbc:oracle:thin:@localhost:1521:orcl
driverClass=oracle.jdbc.driver.OracleDriver

initialPoolSize=12
maxPoolSize=20
minPoolSize=5

<?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:p="http://www.springframework.org/schema/p"
    xmlns:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="
        http://www.springframework.org/schema/beans 
        http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context.xsd">


    <context:property-placeholder location="classpath:dataSourceConfig.properties"/>
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
    
        <property name="user" value="${user}"></property>
        <property name="password" value="${password}"></property>
        <property name="jdbcUrl" value="${jdbcUrl}"></property>
        <property name="driverClass" value="${driverClass}"></property>
            
        <property name="initialPoolSize" value="${initialPoolSize}"></property>
        <property name="maxPoolSize" value="${maxPoolSize}"></property>
        <property name="minPoolSize" value="${minPoolSize}"></property>
        
    </bean>
    
    <bean id="template" class="org.springframework.jdbc.core.JdbcTemplate">
        <property name="dataSource" ref="dataSource"></property>
    </bean>
    
    
</beans>

package com.zr.entity;

public class User {
    private int id;
    private String username;
    private String password;
    private String email;
    private String phone;
    public int getId() {
        return id;
    }
    public void setId(int id) {
        this.id = id;
    }
    public String getUsername() {
        return username;
    }
    public void setUsername(String username) {
        this.username = username;
    }
    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }
    public String getEmail() {
        return email;
    }
    public void setEmail(String email) {
        this.email = email;
    }
    public String getPhone() {
        return phone;
    }
    public void setPhone(String phone) {
        this.phone = phone;
    }
    public User() {
        super();
    }
    public User(int id, String username, String password, String email,
            String phone) {
        super();
        this.id = id;
        this.username = username;
        this.password = password;
        this.email = email;
        this.phone = phone;
    }
    @Override
    public String toString() {
        return "User [id=" + id + ", username=" + username + ", password="
                + password + ", email=" + email + ", phone=" + phone + "]";
    }
    
    
}

package com.zr.utils;

import java.util.List;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.jdbc.core.BeanPropertyRowMapper;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.core.RowMapper;


import com.zr.entity.User;

public class TemplateOperation {
    
    private ApplicationContext ctc = null;
    private JdbcTemplate template = null;
    {
        ctc = new ClassPathXmlApplicationContext("applicationContext.xml");
        template = (JdbcTemplate) ctc.getBean("template");
    }
    
    
    
    /**
     * @return the row number from table
     */
    public int queryRowNumber(){
        int result = 0;
        String sql = "SELECT COUNT(*) FROM USERTEST";
        result = template.queryForObject(sql, Integer.class);
        return result;
    }
    
    /**
     * update table data by sql command and parameters
     * @param sql  sql-command
     * @param args
     * @return the number how many rows be operated
     */
    public  int updateUser(String sql,Object...args){
        return template.update(sql,args);
    }
    
    /**
     * query user infomation by username from table
     * @param sql sql-command
     * @param args
     * @return user infomation
     */
    public User queryUserByUsername(String sql,Object...args){
        RowMapper<User> rowMapper = new BeanPropertyRowMapper<User>(User.class);
        User user = template.queryForObject(sql, rowMapper, args);
        return user;
    }
    
    /**
     * @return the set storing all data from table
     */
    public List<User> queryAllUser(){
        String sql = "SELECT * FROM USERTEST";
        RowMapper<User> rowMapper = new BeanPropertyRowMapper<User>(User.class);
        List<User> list = template.query(sql, rowMapper);
        return list;
    }

}

package com.zr.utils;

import java.util.List;

import com.zr.entity.User;

public class TestOperation {
    
    public static void main(String[] args) {
        TemplateOperation operation = new TemplateOperation();
        
        /*String sql = "INSERT INTO USERTEST VALUES(?,?,?,?,?)";
        System.out.println(operation.updateUser(sql,3,"lhh","123","123","123"));*/
        
        String sql = "SELECT * FROM USERTEST WHERE USERNAME=?";
        User user1 = operation.queryUserByUsername(sql, "lf");
        System.out.println("user1:"+user1);
        
        List<User> list = operation.queryAllUser();
        for(User user : list){
            System.out.println(user);
        }
        
        System.out.println(operation.queryRowNumber());
    }
}