SpringMVC进阶操作【SSM整合】
文章目录
- SpringMVC进阶操作
-
- 1 请求转发和重定向
- 2 SpringMVC响应JSON格式
- 3 SSM整合【*】
-
- 3.1 创建数据库表
- 3.2 创建maven工程，导入jar包
- 3.3 创建和完善功能模块
- 注意：此处项目结构少写了service实现层，大家补上即可【service层是接口，serviceImpl是类】
- 3.4 创建对应配置文件
-
- 3.4.1 【jdbc.properties】
- 3.4.2 【log4j2】
- 3.4.2 【springmvc.xml】
- 3.4.3 applicationContext.xml
- 3.4.4 web.xml
- 3.5 创建相关层代码
-
- 3.5.1【pojo层】
- 3.5.2 【mapper层】
- 3.5.3 【service层及实现类】
- 3.5.4 【controller】
- 3.5.4 【mapper.xml】
- 拓展：
SpringMVC进阶操作
1 请求转发和重定向
包括使用传统的方式和使用SpringMVC的方式
/**
* 使用传统的request和response【ServletAPI方式】
* @param request
* @param response
* @throws Exception
*/
@RequestMapping("/test01")
public void test01(HttpServletRequest request, HttpServletResponse response) throws Exception {
//请求转发
// request.getRequestDispatcher("/forwardPage.jsp").forward(request, response);
//响应重定向【响应重定向如果前面加了/需要从项目上下文路径算起】
response.sendRedirect(request.getContextPath() + "/redirectPage.jsp");
}
/**
* SpringMVC中依赖DispatcherServlet
* 通过redirect关键字和forward关键字来实现【forward关键字可以省略】
* @return
*/
@RequestMapping("/test02")
public String test02(){
// return "forward:/forwardPage.jsp";[forward关键字可以省略]
// return "/forwardPage.jsp";
return "redirect:/redirectPage.jsp";
}
//view方式
@RequestMapping("/test03")
public View test03(HttpServletRequest request){
View view = null;
// view = new InternalResourceView("/forwardPage.jsp");
view = new RedirectView(request.getContextPath() + "/redirectPage.jsp");
return view;
}
我们也可以使用ModelAndView方式，mv.setViewName()/mv.setView()
2 SpringMVC响应JSON格式
①导入jackson
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.13.2.2</version>
</dependency>
②导入jquery并在springmvc.xml中配置静态资源放行：
<mvc:resources mapping="js/**" location="/js/"/>
③编写testAjaxController：
@RestController
public class TestAjaxController {
@RequestMapping("/testAjax")
public Pet testAjax(Person p){
System.out.println(p);
Pet pet = new Pet("xiaohuang", "dog");
return pet;
}
}
④编写testAjax.jsp页面：
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>Titletitle>
<script src="js/jquery-3.4.1.js">script>
<script>
$(function (){
$("#btn").click(function (){
$.get("testAjax", {name:"zhangsan", age:"21"}, function (data){
console.log(data.name)
console.log(data.type)
})
})
})
script>
head>
<body>
<input type="button" id="btn" value="testAjax">
body>
html>
拓展：
【1】Controller返回值是void：如果配置了视图解析器，那么SpringMVC会根据controller的RequestMapping找到对应的页面；如果没有配置，那么会报500异常，但是控制单元仍然可以正常进行
@Controller
public class TestVoidController {
@RequestMapping("/testVoid")
public void testVoid(){
System.out.println("void controller....");
}
}
3 SSM整合【*】
3.1 创建数据库表
3.2 创建maven工程，导入jar包
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>org.example</groupId>
<artifactId>ssm_01</artifactId>
<version>1.0-SNAPSHOT</version>
<dependencies>
<!--spring核心容器-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>5.3.21</version>
</dependency>
<!--spring aop-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aop</artifactId>
<version>5.3.21</version>
</dependency>
<!--aop联盟包-->
<dependency>
<groupId>aopalliance</groupId>
<artifactId>aopalliance</artifactId>
<version>1.0</version>
</dependency>
<!--druid连接池-->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>1.2.6</version>
</dependency>
<!--mysql驱动-->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.28</version>
</dependency>
<!--springJDBC包-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>5.3.21</version>
</dependency>
<!--spring orm映射依赖-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</artifactId>
<version>5.3.16</version>
</dependency>
<!--apache commons 第三方 日志包-->
<dependency>
<groupId>commons-logging</groupId>
<artifactId>commons-logging</artifactId>
<version>1.2</version>
</dependency>
<!--log4j2日志-->
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-slf4j-impl</artifactId>
<version>2.14.0</version>
</dependency>
<!--lombok-->
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.22</version>
</dependency>
<!--spring-test-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>5.3.21</version>
</dependency>
<!--junit5-->
<dependency>
<groupId>org.junit.jupiter</groupId>
<artifactId>junit-jupiter-api</artifactId>
<version>5.8.2</version>
<scope>test</scope>
</dependency>
<!--springMVC核心组件-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>5.3.21</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>5.3.21</version>
</dependency>
<!--jsp 和 servlet依赖-->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>4.0.1</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>4.0.1</version>
</dependency>
<!--json依赖-->
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.13.2.2</version>
</dependency>
<!--myBatis的核心jar包-->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.5.9</version>
</dependency>
<!--spring 与 mybatis 整合包-->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>2.0.7</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.1</version>
<configuration>
<source>8</source>
<target>8</target>
</configuration>
</plugin>
</plugins>
</build>
</project>
3.3 创建和完善功能模块
【基于webapp模板构建出来的项目结构并不完成】
整个项目的结构如下：
注意：此处项目结构少写了service实现层，大家补上即可【service层是接口，serviceImpl是类】
3.4 创建对应配置文件
3.4.1 【jdbc.properties】
jdbc.driver=com.mysql.cj.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/mp?serverTimezone=UTC
jdbc.username=root
jdbc.password=123456
3.4.2 【log4j2】
<?xml version="1.0" encoding="UTF-8"?>
<Configuration status="INFO">
<Appenders>
<Console name="Console" target="SYSTEM_ERR">
<PatternLayout pattern="%d{YYYY-MM-dd HH:mm:ss}
[%t] %-5p %c{1}:%L - %msg%n"/>
</Console>
</Appenders>
<Loggers>
<Root level="DEBUG">
<AppenderRef ref="Console"/>
</Root>
</Loggers>
</Configuration>
3.4.2 【springmvc.xml】
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
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
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd
">
<context:component-scan base-package="com.zi.controller">context:component-scan>
<mvc:annotation-driven/>
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="suffix" value=".jsp">property>
bean>
<mvc:resources mapping="/js/**" location="/js/">mvc:resources>
<mvc:resources mapping="/css/**" location="/css/">mvc:resources>
<mvc:resources mapping="/static/**" location="/static/">mvc:resources>
beans>
3.4.3 applicationContext.xml
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:tx="http://www.springframework.org/schema/tx"
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
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd
">
<context:property-placeholder location="classpath:jdbc.properties">context:property-placeholder>
<context:component-scan base-package="com.zi.service">context:component-scan>
<bean class="com.alibaba.druid.pool.DruidDataSource" id="dataSource">
<property name="driverClassName" value="${jdbc.driver}">property>
<property name="url" value="${jdbc.url}">property>
<property name="username" value="${jdbc.username}">property>
<property name="password" value="${jdbc.password}">property>
bean>
<bean class="org.mybatis.spring.SqlSessionFactoryBean" id="factory">
<property name="dataSource" ref="dataSource">property>
<property name="typeAliasesPackage" value="com.zi.pojo">property>
bean>
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="sqlSessionFactoryBeanName" value="factory">property>
<property name="basePackage" value="com.zi.mapper">property>
bean>
<bean class="org.springframework.jdbc.datasource.DataSourceTransactionManager" id="transactionManager">
<property name="dataSource" ref="dataSource">property>
bean>
<tx:annotation-driven transaction-manager="transactionManager"/>
beans>
3.4.4 web.xml
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
version="4.0">
<context-param>
<param-name>contextConfigLocationparam-name>
<param-value>classpath:applicationContext.xmlparam-value>
context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListenerlistener-class>
listener>
<filter>
<filter-name>encodingFilterfilter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilterfilter-class>
<init-param>
<param-name>encodingparam-name>
<param-value>utf-8param-value>
init-param>
filter>
<filter-mapping>
<filter-name>encodingFilterfilter-name>
<url-pattern>/*url-pattern>
filter-mapping>
<servlet>
<servlet-name>dispatcherServletservlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServletservlet-class>
<init-param>
<param-name>contextConfigLocationparam-name>
<param-value>classpath:springmvc.xmlparam-value>
init-param>
<load-on-startup>1load-on-startup>
servlet>
<servlet-mapping>
<servlet-name>dispatcherServletservlet-name>
<url-pattern>/url-pattern>
servlet-mapping>
web-app>
3.5 创建相关层代码
3.5.1【pojo层】
user.java
@Data
@AllArgsConstructor
@NoArgsConstructor
public class User implements Serializable {
private Integer uid;
private String uname;
private String upwd;
}
3.5.2 【mapper层】
UserMapper
public interface UserMapper {
/**
* 根据用户名、密码查询用户
* @param uname
* @param upwd
* @return
*/
User findUser(String uname, String upwd);
List<User> findAllUser();
}
3.5.3 【service层及实现类】
UserService：
public interface UserService {
public User findUser(String uname, String upwd);
public List<User> findAllUser();
}
UserServiceImpl：
@Service
public class UserServiceImpl implements UserService {
@Autowired
private UserMapper userMapper;
public User findUser(String uname, String upwd) {
User user = null;
user = userMapper.findUser(uname, upwd);
return user;
}
public List<User> findAllUser() {
return userMapper.findAllUser();
}
}
3.5.4 【controller】
UserController：
@Controller
public class UserController {
@Autowired
private UserService userService;
@RequestMapping("/findUser")
private String findUser(String uname, String upwd){
User user = userService.findUser(uname, upwd);
if(user != null){
return "success";
} else{
return "fail";
}
}
//以json格式返回所有用户信息
@ResponseBody
@RequestMapping("/findAll")
public List<User> findAllUser(){
return userService.findAllUser();
}
}
3.5.4 【mapper.xml】
UserMapper.xml
DOCTYPE mapper
PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.zi.mapper.UserMapper">
<select id="findUser" resultType="user">
select * from user where uname = #{param1} and upwd = #{param2}
select>
<select id="findAllUser" resultType="user">
select * from user
select>
mapper>
拓展：
war模式：将web工程以war包的形式上传到服务器
war exploed模式：将web工程以当前文件夹的位置关系上传到服务器