Spring Boot注解与资源文件配置
date: 2018-11-18 16:57:17
updated: 2018-11-18 16:57:17
1.不需要多余的配置文件信息
application.properties
mybatis.type-aliases-package=com.mxxd.SCM.Dao
mybatis.mapper-locations=classpath:mybatis/mapper/*.xml
spring.datasource.driverClassName = com.mysql.jdbc.Driver
spring.datasource.url = jdbc:mysql://localhost:3306/scm?useUnicode=true&characterEncoding=utf-8
spring.datasource.username = root
spring.datasource.password =
spring.freemarker.template-loader-path=classpath:/template/
spring.freemarker.suffix=.ftl
spring.freemarker.cache=false
spring.freemarker.charset=UTF-8
Dao层mapper 添加注解 @Repository
@Repository
public interface UserMapper {
//@Select("SELECT * FROM `users` where user_username = #{username} and user_password = #{password}")
public UserEntity login(String username, String password);
public UserEntity queryUser(String name);
public boolean insert(UserEntity user);
public boolean update(UserEntity user);
public boolean delete(int id);
}
mapper.xml文件
<?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="com.mxxd.SCM.Dao.UserMapper" >
<resultMap id="userMap" type="com.mxxd.SCM.Entity.UserEntity" >
<id column="user_id" property="id" />
<result column="user_username" property="username" />
<result column="user_password" property="password" />
<result column="user_name" property="name" />
<result column="user_phone" property="phone" />
<result column="user_email" property="email" />
<result column="user_address" property="address" />
<result column="user_authority" property="authority" />
<result column="is_login" property="is_login" />
</resultMap>
<select id="login" parameterType="String" resultMap="userMap">
select *
from users where user_username = #{0} and user_password = #{1}
</select>
<select id="queryUser" resultMap="userMap">
select *
from users
where 1=1
<if test="id !=0">
and user_id = #{id}
</if>
<if test="username !=null and username !='' ">
and user_username = #{username}
</if>
<if test="password !=null and password !='' ">
and user_password = #{password}
</if>
<if test="name !=null and name !='' ">
and user_name like "%" #{name}"%"
</if>
</select>
<insert id="insert" parameterType="com.mxxd.SCM.Entity.UserEntity" >
INSERT INTO
users
(user_username,user_password,user_name,user_phone,user_email,user_address,user_authority,is_login)
VALUES
(#{username}, #{password}, #{name},#{phone},#{email},#{address},#{authority},#{is_login})
</insert>
<update id="update" parameterType="com.mxxd.SCM.Entity.UserEntity" >
UPDATE
users
SET
<if test="username != null and username != ''">user_username = #{username},</if>
<if test="password != null and password != ''">user_password = #{password},</if>
<if test="name != null and name != ''">user_name = #{name},</if>
<if test="phone != null and phone != ''">user_phone = #{phone},</if>
<if test="email != null and email != ''">user_email = #{email},</if>
<if test="address != null and address != ''">user_address = #{address},</if>
<if test="authority != null and authority != ''">user_authority = #{authority},</if>
WHERE
user_id = #{id}
</update>
<delete id="delete" parameterType="Integer" >
DELETE FROM
users
WHERE
user_id =#{0}
</delete>
</mapper>
Service层只需要一个service类即可 不需要一个接口一个实现类 添加注解
@Service
@Autowired 是指自动生成get和set方法
@Service
public class UserService {
@Autowired
private UserMapper userMapper;
public UserEntity login(String username, String password){
UserEntity user = userMapper.login(username,password);
return user;
}
}
启动类添加注解 @MapperScan("com.mxxd.SCM.Dao")自动扫描Dao层mapper
@SpringBootApplication
@MapperScan("com.mxxd.SCM.Dao")
public class ScmApplication {
public static void main(String[] args) {
SpringApplication.run(ScmApplication.class, args);
}
}
2.前端不推荐jsp，推荐thymeleaf或freemarker
使用freemarker
pom.xml文件添加依赖
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-freemarker</artifactId>
</dependency>
前端使用 .ftl 文件
在resources文件夹下创建两个目录：static 和 template
static：目录下创建css、js、img三个目录，存放静态资源文件
template：目录下存放 XX.ftl 文件
在com.mxxd.SCM目录下创建一个Conf目录，配置springboot的静态资源文件目录
@Configuration
public class WebMvcConfig extends WebMvcConfigurerAdapter {
@Override
public void addResourceHandlers(ResourceHandlerRegistry registry) {
registry.addResourceHandler("/static/**").addResourceLocations("classpath:/static/");
}
@Bean
public HttpMessageConverter<String> responseBodyConverter() {
StringHttpMessageConverter converter = new StringHttpMessageConverter(
Charset.forName("UTF-8"));
return converter;
}
@Override
public void configureMessageConverters(
List<HttpMessageConverter<?>> converters) {
super.configureMessageConverters(converters);
converters.add(responseBodyConverter());
}
@Override
public void configureContentNegotiation(
ContentNegotiationConfigurer configurer) {
configurer.favorPathExtension(false);
}
}
在 ftl 文件中如下引用
如果要引用其他页面，使用 <#include />
<#include "header.ftl" encoding="UTF-8"/>
3.启动项目必须启动XXXApplication启动类
不能进行单元测试！！！ 因为需要等SpringBoot把所有的配置全部编译完成之后才能运行，不然会找不到BeanFactory
4.测试controller层调用service调用mapper连接数据库返回值是否正确
@Controller
@RequestMapping("/user")
public class UserController {
@Autowired
private UserService userService;
/*
* 启动之后访问 /user/test 会自动跳转到index.ftl
* 如果直接访问index.ftl是无法访问成功的
* 因为ftl文件是一个模板文件，需要经过后台跳转才能进行渲染成网页
*/
@RequestMapping("/test")
public String home(){
return "index";
}
@RequestMapping("/home")
public ModelAndView login() {
UserEntity userEntity = userService.login("admin", "admin");
ModelAndView mv = new ModelAndView();
if (userEntity == null) {
mv.addObject("message", "用户名或密码错误，请重新输入！");
mv.setViewName("index");
} else {
mv.addObject("user", userEntity);
mv.setViewName("index");
}
System.out.println(userEntity);
System.out.println(mv.getModel());
System.out.println(mv.getViewName());
return mv;
}
}
直接在页面上进行测试，@Test 使用会报空指针错误
添加 @ResponseBody 注解不用返回页面，直接打印输出结果
前端直接使用 ${user.name} 获取user里name属性值 ${user}获取user整个对象值
