黑马ssm学习笔记-SpringMVC-day01
三层架构
入门程序
springmvc_day01_01_start
1. 创建maven-webapp模块
解决创建maven项目过慢问题：
2. 添加java,recources文件夹
3. 修改编译版本1.8，spring版本号锁定
4. 导入依赖
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-contextartifactId>
<version>${spring.version}version>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-webartifactId>
<version>${spring.version}version>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-webmvcartifactId>
<version>${spring.version}version>
dependency>
<dependency>
<groupId>javax.servletgroupId>
<artifactId>servlet-apiartifactId>
<version>2.5version>
<scope>providedscope>
dependency>
<dependency>
<groupId>javax.servlet.jspgroupId>
<artifactId>jsp-apiartifactId>
<version>2.0version>
<scope>providedscope>
dependency>
5. 前端控制器
在web.xml中配置DispatcherServlet
<servlet>
<servlet-name>dispatcherServletservlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServletservlet-class>
servlet>
<servlet-mapping>
<servlet-name>dispatcherServletservlet-name>
<url-pattern>/url-pattern>
servlet-mapping>
6. 创建springmvc.xml
7. 配置服务器
8. 创建新的index.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>Title</title>
</head>
<body>
<h3>入门程序</h3>
<a href="">入门程序</a>
</body>
</html>
9. 创建控制器HelloController
package cn.itcast.controller;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
// 控制器类
@Controller
public class HelloController {
@RequestMapping(path = "/hello")
public String sayHello(){
System.out.println("Hello StringMVC");
return null;
}
}
10. 配置spring创建容器时要扫描的包
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd">
<context:component-scan base-package="cn.itcast">context:component-scan>
11. 在web.xml的servlet配置中加上全局的初始化参数
<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>
12. 创建success.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>Title</title>
</head>
<body>
<h3>入门成功！！！</h3>
</body>
</html>
13. 视图解析器对象
<bean id="internalResourceViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/pages/"/>
<property name="suffix" value=".jsp"/>
bean>
14. 配置spring开启注解mvc的支持
<mvc:annotation-driven>mvc:annotation-driven>
入门案例流程分析
组件介绍
ResultMapping注解
index.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>Title</title>
</head>
<body>
<h3>入门程序</h3>
<%-- <a href="hello">入门程序</a>--%>
<a href="user/testRequestMapping">RequestMapping</a>
</body>
</html>
HelloController.java
package cn.itcast.controller;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
// 控制器类
@Controller
@RequestMapping(path = "/user")
public class HelloController {
/**
* 入门案例
* @return
*/
@RequestMapping(path = "/hello")
public String sayHello() {
System.out.println("Hello SpringMVC");
return "success";
}
/**
* RequestMapping注解
* @return
*/
@RequestMapping(path = "/testRequestMapping")
public String testRequestMapping(){
System.out.println("测试RequestMapping注解...");
return "success";
}
}
参数绑定
1. 创建parm.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>Title</title>
</head>
<body>
<a href="param/testParam?username=hh&password=123">参数绑定</a>
</body>
</html>
2. ParamController.java
package cn.itcast.controller;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
@Controller
@RequestMapping("/param")
public class ParamController {
@RequestMapping("/testParam")
public String testParam(String username, String password){
System.out.println("测试参数绑定...");
System.out.println("用户名：" + username);
System.out.println("密码：" + password);
return "success";
}
}
传递JavaBean
1. cn.itcast.domain.Account.java实体类
package cn.itcast.domain;
public class Account {
private String username;
private String password;
private Double money;
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 Double getMoney() {
return money;
}
public void setMoney(Double money) {
this.money = money;
}
@Override
public String toString() {
return "Account{" +
"username='" + username + '\'' +
", password='" + password + '\'' +
", money=" + money +
'}';
}
}
2. param.jsp中建立表单
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>Title</title>
</head>
<body>
<%-- <a href="param/testParam?username=hh&password=123">参数绑定</a>--%>
<form action="param/saveAccount" method="get">
姓名：<input type="text" name="username" /><br/>
密码：<input type="text" name="password" /><br/>
金额：<input type="text" name="money" /><br/>
<input type="submit" value="提交" />
</form>
</body>
</html>
3. ParamController中写saveAccount()方法
package cn.itcast.controller;
import cn.itcast.domain.Account;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
@Controller
@RequestMapping("/param")
public class ParamController {
@RequestMapping("/testParam")
public String testParam(String username, String password){
System.out.println("测试参数绑定...");
System.out.println("用户名：" + username);
System.out.println("密码：" + password);
return "success";
}
@RequestMapping("/saveAccount")
public String saveAccount(Account account) {
System.out.println(account);
return "success";
}
}
Account包含User
1. User.java
2. param.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>Title</title>
</head>
<body>
<%-- <a href="param/testParam?username=hh&password=123">参数绑定</a>--%>
<form action="param/saveAccount" method="get">
姓名：<input type="text" name="username" /><br/>
密码：<input type="text" name="password" /><br/>
金额：<input type="text" name="money" /><br/>
用户姓名：<input type="text" name="user.uname" /><br/>
年龄：<input type="text" name="user.age" /><br/>
<input type="submit" value="提交" />
</form>
</body>
</html>
post方法中文乱码的过滤器
web.xml配置解决中文乱码的过滤器
<filter>
<filter-name>characterEncodingFilterfilter-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>characterEncodingFilterfilter-name>
<url-pattern>/*url-pattern>
filter-mapping>
Account包含List,Map
param.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>Title</title>
</head>
<body>
<%-- <a href="param/testParam?username=hh&password=123">参数绑定</a>--%>
<form action="param/saveAccount" method="post">
姓名：<input type="text" name="username" /><br/>
密码：<input type="text" name="password" /><br/>
金额：<input type="text" name="money" /><br/>
用户姓名：<input type="text" name="list[0].uname" /><br/>
年龄：<input type="text" name="list[0].age" /><br/>
用户姓名：<input type="text" name="map['one'].uname" /><br/>
年龄：<input type="text" name="map['one'].age" /><br/>
<input type="submit" value="提交" />
</form>
</body>
</html>
自定义类型转换器
1. User中加上日期字段
2. 修改param.jsp
<form action="param/saveUser" method="post">
用户姓名：<input type="text" name="uname" /><br/>
年龄：<input type="text" name="age" /><br/>
生日：<input type="text" name="birthday" /><br/>
<input type="submit" value="提交" />
</form>
3. 增加saveUser()方法
4. cn.itcast.utils.StringToDateConverter.java
package cn.itcast.utils;
import org.springframework.core.convert.converter.Converter;
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
public class StringToDateConverter implements Converter<String, Date> {
@Override
public Date convert(String s) {
if (s == null)
throw new RuntimeException("请输入数据");
DateFormat df = new SimpleDateFormat("yyyy-MM-dd");
try {
return df.parse(s);
} catch (ParseException e) {
throw new RuntimeException("数据类型转换出现错误");
}
}
}
5. springmvc.xml配置自定义类型转换器
<bean id="conversionService" class="org.springframework.context.support.ConversionServiceFactoryBean">
<property name="converters">
<set>
<bean class="cn.itcast.utils.StringToDateConverter" />
set>
property>
bean>
<mvc:annotation-driven conversion-service="conversionService"/>