# db.properties文件配置
jdbc.driver=com.mysql.cj.jdbc.Driver
#jdbc.driver=com.microsoft.sqlserver.jdbc.SQLServerDriver
jdbc.url=jdbc:mysql://:3306/bybaitis?serverTimezone=UTC
#jdbc.url=jdbc:sqlserver://localhost:1433;databasename=eCommerce
jdbc.username=root
jdbc.password=123456
#新添加
jdbc.maxTotal = 30
jdbc.maxIdle = 10
jdbc.initialSize = 5
#数据库连接最大数
<!-- applicationContext.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:tx="http://www.springframework.org/schema/tx"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.3.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-4.3.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-4.3.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-4.3.xsd">
<!-- 读取db.properties -->
<context:property-placeholder location="classpath:db.properties"/>
<!-- 配置数据源 -->
<bean id="dataSource"
class="org.apache.commons.dbcp2.BasicDataSource">
<!--数据库驱动 -->
<property name="driverClassName" value="${jdbc.driver}" />
<!--连接数据库的url -->
<property name="url" value="${jdbc.url}" />
<!--连接数据库的用户名 -->
<property name="username" value="${jdbc.username}" />
<!--连接数据库的密码 -->
<property name="password" value="${jdbc.password}" />
<!--最大连接数 -->
<property name="maxTotal" value="${jdbc.maxTotal}" />
<!--最大空闲连接 -->
<property name="maxIdle" value="${jdbc.maxIdle}" />
<!--初始化连接数 -->
<property name="initialSize" value="${jdbc.initialSize}" />
</bean>
<!-- 事务管理器,依赖于数据源 -->
<bean id="transactionManager" class=
"org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource" />
</bean>
<!-- 开启事务注解 -->
<tx:annotation-driven transaction-manager="transactionManager"/>
<!-- 配置MyBatis工厂SqlSessionFactory -->
<bean id="sqlSessionFactory"
class="org.mybatis.spring.SqlSessionFactoryBean">
<!--注入数据源 -->
<property name="dataSource" ref="dataSource" />
<!--指定核MyBatis心配置文件位置 -->
<property name="configLocation" value="classpath:mybatis-config.xml" />
</bean>
<!-- 配置mapper扫描器 -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="dao"/>
</bean>
<!-- 扫描Service -->
<context:component-scan base-package="service" />
</beans>
<!-- mybatis-config.xml -->
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
<!-- 别名定义 -->
<typeAliases>
<package name="po" />
</typeAliases>
</configuration>
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee
http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
id="WebApp_ID" version="3.1">
<!-- 配置加载Spring文件的监听器-->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</context-param>
<listener>
<listener-class>
org.springframework.web.context.ContextLoaderListener
</listener-class>
</listener>
<!-- 编码过滤器 -->
<filter>
<filter-name>encoding</filter-name>
<filter-class>
org.springframework.web.filter.CharacterEncodingFilter
</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>UTF-8</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>encoding</filter-name>
<url-pattern>*.action</url-pattern>
</filter-mapping>
<!-- 配置Spring MVC前端核心控制器 -->
<servlet>
<servlet-name>springmvc</servlet-name>
<servlet-class>
org.springframework.web.servlet.DispatcherServlet
</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:springmvc-config.xml</param-value>
</init-param>
<!-- 配置服务器启动后立即加载Spring MVC配置文件 -->
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>springmvc</servlet-name>
<!--/:拦截所有请求(除了jsp)-->
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>
package po;
public class Customer {
private Integer id;
private String username;
private String jobs;
private String phone;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getJobs() {
return jobs;
}
public void setJobs(String jobs) {
this.jobs = jobs;
}
public String getPhone() {
return phone;
}
public void setPhone(String phone) {
this.phone = phone;
}
@Override
public String toString() {
return "Customer [id=" + id + ", username=" + username + ", jobs=" + jobs + ", phone=" + phone + "]";
}
}
package dao;
import po.Customer;
public interface CustomerDao {
public Customer findCustomerById(Integer id);
}
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="dao.CustomerDao">
<select id="findCustomerById" parameterType="Integer" resultType="Customer">
select * from customer where id = #{id}
</select>
</mapper>
package service;
import po.Customer;
public interface CustomerService {
public Customer findCustomerById(Integer id);
}
package service.impl;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import dao.CustomerDao;
import po.Customer;
import service.CustomerService;
@Service
@Transactional
public class CustomerServiceImpl implements CustomerService {
//注解注入CustomerDao
@Autowired
private CustomerDao customerDao;
public Customer findCustomerById(Integer id) {
//查询客户
return this.customerDao.findCustomerById(id);
}
}
package controller;
import javax.json.Json;
import javax.servlet.http.HttpServletResponse;
import org.apache.ibatis.annotations.Param;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController;
import com.alibaba.fastjson.JSON;
import po.Customer;
import po.Result;
import service.CustomerService;
@RestController
public class CustomerController {
//注解注入CustomerService
@Autowired
private CustomerService customerService;
/*
* 根据id查询客户详情
*/
@RequestMapping(value = "/findCustomerById/{id}", produces = "application/json; charset=utf-8")
public String findCustomerById(@PathVariable Integer id) {
System.out.println(id);
Customer customer = customerService.findCustomerById(id);
System.out.println(customer);
//返回客户信息展示页面
Result result = new Result(0,"获取成功",customer);
return result.toJSON();
}
}
此处为restful风格,Result类为自定义放回格式的一个类
在postman工具发送请求http://localhost:8080/containsNew/findCustomerById/3
返回案例
{
"data": {
"id": 3,
"jobs": "worker",
"phone": "45613513",
"username": "tom"
},
"msg": "获取成功",
"status": 0
}
gitee地址:https://gitee.com/jh1210