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ver mvc doctrina

2024-07-12

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Caput IV Ver MVC

Sectio I Introductio ad Spring MVC

1. Ver MVC

SpringMVC fons compagis apertus Java et modulus independens in Ver Framework ecosystematis. Instruit petitionem levem interretialem compagem interretialem MVC (data, negotia et praesentationem) delineandi formam in ver fundatam commodum.

2. Ver MVC core components

  • DispatcherServlet ante controller

    Reus ad petitiones accipiendas et petitiones distribuendas

  • Tracto processus

    Processus interceptores, methodos in moderatore, etc. includit, et maxime responsabilis est pro processu petitionum.

  • HandlerMapping processus mapper

    Parse configurationis files, annotationes scan et petitiones processors aequant

  • HandlerAdpter orci nibh

    Invenire adaptationem processum secundum petitionem

  • ViewResolver visum resolver

    Effectus consecutus postquam processus exsecutus est visum esse potest, sed haec sententia logica est sententia (est logica nota in pagina, ut ansas et iudicia), et necesse est ut processus resolventis usus sit dicta reddens visum.

Sectio 2 Ver MVC Development et Evolutionis

<!--低版本-->
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-context</artifactId>
    <version>4.3.9.RELEASE</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-webmvc</artifactId>
    <version>4.3.9.RELEASE</version>
</dependency>
<dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>javax.servlet-api</artifactId>
    <version>4.0.1</version>
    <scope>provided</scope>
</dependency>

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1. Bean nomen vel ID aequet URL petitionem

1.1 web.xml configuration
<servlet>
    <servlet-name>dispatcherServlet</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <init-param>
        <!--配置Servlet初始化参数-->
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:spring-mvc.xml</param-value>
    </init-param>
    <!--前置控制器要接收所有的请求，因此在容器启动的时候就应该完成初始化-->
    <load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
    <servlet-name>dispatcherServlet</servlet-name>
    <url-pattern>/</url-pattern>
</servlet-mapping>

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1.2 ver-mvc.xml configuration
<!--视图解析器：在控制器返回视图的时候生效-->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
    <!--视图资源的前缀-->
    <property name="prefix" value="/" />
    <!--视图资源的后缀-->
    <property name="suffix" value=".jsp" />
</bean>
<!--处理器映射的方式：使用bean的名字或者id的值来与请求匹配-->
<bean class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping"/>

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1,3 scribens moderatoris
public class UserController extends AbstractController {

    @Override
    protected ModelAndView handleRequestInternal(HttpServletRequest req, HttpServletResponse resp) throws Exception {
        //这里使用配置的视图解析器进行解析  user => / + user + .jsp => /user.jsp
        return new ModelAndView("user");
    }
}

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1.4 configurare moderatoris
<!--通过id值匹配请求的URL-->
<bean id="/view" class="com.qf.spring.mvc.controller.UserController" />

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Cogitans: Secundum hunc modum petitionum adaptationis, quaelibet postulatio requirit moderatorem ut ei respondeat. Hoc idem est ac utens explicatio Servlet.

Spring 提供了方法名来匹配请求来解决这个问题

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2. nomen methodi fabae petitioni aequet

2.1 Ratio nomen Total

Ver praebet InternalPathMethodNameResolver, resolvens ad methodum nominum in moderatore. Munus solutionis huius est methodo nomine uti pro fundamento petitionum URL adaptandi et cum moderatore coniungendi.

2.2 Multi-operatio controller

Ver praebet MultiActionController moderatoris classium pro aliis generibus moderatoris ut hereditates. In suis subclassibus, tincidunt plures methodos scribere possunt ad petitiones processus expediendas, et methodum nominandi parser adhibendi ut petitioni par.

2.3 scribens moderatoris
public class UserMultiController extends MultiActionController {
    //这个方法就匹配 /login 请求
    //请求格式必须是 
    //ModelAndView 方法名(HttpServletRequest req, HttpServletResponse resp){}
    public ModelAndView login(HttpServletRequest req, HttpServletResponse resp){
        return new ModelAndView("login");
    }

    //这个方法就匹配 /register 请求
    public ModelAndView register(HttpServletRequest req, HttpServletResponse resp){
        return new ModelAndView("register");
    }
}

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2.4 ver-mvc.xml configuration
 <!--方法名解析器-->
<bean id="methodNameResolver" class="org.springframework.web.servlet.mvc.multiaction.InternalPathMethodNameResolver" />
<!-- /login 请求使用该bean对象处理-->
<bean id="/login" class="com.qf.spring.mvc.controller.UserMultiController">
    <property name="methodNameResolver" ref="methodNameResolver" />
</bean>
<!-- /register 请求使用该bean对象处理-->
<bean id="/register" class="com.qf.spring.mvc.controller.UserMultiController">
    <property name="methodNameResolver" ref="methodNameResolver" />
</bean>

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Cogitans: Secundum hunc modum petitionum adaptationis, si moderatrix multas petitiones tractare debet, permagnum pondus informationis configurationis ducet, quod postea difficile erit conservare.

Spring 提供了 SimpleUrlHandlerMapping 映射器， 该映射器支持一个控制器与多个请求匹配的同时也解决了配置信息繁多的问题。

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3. URL Simple tracto tabularum faciendarum

Uti SimpleUrlHandlerMapping, solum debes mutare configurationem ver-mvc.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"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
    <!--视图解析器：在控制器返回视图的时候生效-->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <!--视图资源的前缀-->
        <property name="prefix" value="/" />
        <!--视图资源的后缀-->
        <property name="suffix" value=".jsp" />
    </bean>

    <!--处理器映射的方式：使用bean的名字或者id的值来与请求匹配-->
<!--    <bean class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping"/>-->
    <!--通过id值匹配请求的URL-->
<!--    <bean id="/view" class="com.qf.spring.mvc.controller.UserController" />-->
    <!--方法名解析器-->
<!--    <bean id="methodNameResolver" class="org.springframework.web.servlet.mvc.multiaction.InternalPathMethodNameResolver" />-->
    <!-- /login 请求使用该bean对象处理-->
<!--    <bean id="/login" class="com.qf.spring.mvc.controller.UserMultiController">-->
<!--        <property name="methodNameResolver" ref="methodNameResolver" />-->
<!--    </bean>-->
    <!-- /register 请求使用该bean对象处理-->
<!--    <bean id="/register" class="com.qf.spring.mvc.controller.UserMultiController">-->
<!--        <property name="methodNameResolver" ref="methodNameResolver" />-->
<!--    </bean>-->
    <bean class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
        <property name="mappings">
            <props>
                <prop key="/view">userController</prop>
                <prop key="/user/*">userMultiController</prop>
            </props>
        </property>
    </bean>
    <bean id="userController" class="com.qf.spring.mvc.controller.UserController" />
    <bean id="userMultiController" class="com.qf.spring.mvc.controller.UserMultiController" />
</beans>

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Cogitans: Profectum progressionem, functiones res magis ac magis augeri, numerus moderatoris etiam augebit, et numerus par petitionis etiam augebit ?

Spring 提供了 DefaultAnnotationHandlerMapping 映射器，支持使用注解来匹配请求，这样就解决了请求匹配导致配置信息繁多的问题，同时还提升了开发效率。

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4. Annotate matching petitiones

4,1 scribens moderatoris
@Controller
public class UserAnnotationController {

    @RequestMapping(value = "/login", method = RequestMethod.GET)
    public String login(){
        return "login";
    }

    @RequestMapping(value = "/register", method = RequestMethod.GET)
    public String register(){
        return "register";
    }
}

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4.2 ver-mvc.xml configuration
<?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: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">
    <!--视图解析器：在控制器返回视图的时候生效-->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <!--视图资源的前缀-->
        <property name="prefix" value="/" />
        <!--视图资源的后缀-->
        <property name="suffix" value=".jsp" />
    </bean>

    <!--处理器映射的方式：使用bean的名字或者id的值来与请求匹配-->
<!--    <bean class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping"/>-->
    <!--通过id值匹配请求的URL-->
<!--    <bean id="/view" class="com.qf.spring.mvc.controller.UserController" />-->
    <!--方法名解析器-->
<!--    <bean id="methodNameResolver" class="org.springframework.web.servlet.mvc.multiaction.InternalPathMethodNameResolver" />-->
    <!-- /login 请求使用该bean对象处理-->
<!--    <bean id="/login" class="com.qf.spring.mvc.controller.UserMultiController">-->
<!--        <property name="methodNameResolver" ref="methodNameResolver" />-->
<!--    </bean>-->
    <!-- /register 请求使用该bean对象处理-->
<!--    <bean id="/register" class="com.qf.spring.mvc.controller.UserMultiController">-->
<!--        <property name="methodNameResolver" ref="methodNameResolver" />-->
<!--    </bean>-->
    <!--<bean class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
        <property name="mappings">
            <props>
                <prop key="/view">userController</prop>
                <prop key="/login">userMultiController</prop>
                <prop key="/register">userMultiController</prop>
            </props>
        </property>
    </bean>
    <bean id="userController" class="com.qf.spring.mvc.controller.UserController" />
    <bean id="userMultiController" class="com.qf.spring.mvc.controller.UserMultiController" />-->
    <!--类上的注解处理器-->
    <bean class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping" />
    <!--方法上的注解处理器-->
    <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter" />
    <!--扫描包，使得该包下类以及类中定义的方法上所使用的注解生效-->
    <context:component-scan base-package="com.qf.spring.mvc.controller" />
</beans>

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5. Recentior versio configuratione

<?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: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 https://www.springframework.org/schema/mvc/spring-mvc.xsd">
    <!--视图解析器：在控制器返回视图的时候生效-->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <!--视图资源的前缀-->
        <property name="prefix" value="/" />
        <!--视图资源的后缀-->
        <property name="suffix" value=".jsp" />
    </bean>
    <!--较新的版本使用该标签开启注解支持-->
    <mvc:annotation-driven />
    <!--扫描包，使得该包下类以及类中定义的方法上所使用的注解生效-->
    <context:component-scan base-package="com.qf.spring.mvc.controller" />
</beans>

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Sectio III Spring MVC Communes Annotationes

1. @Controller

Haec annotationis est identificantis moderatoris

@Controller
public class UserController{
    
}

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2. @RequestMapping

Haec adnotatio ad petitiones congruit

@Controller
@RequestMapping("/user")
public class UserController{
    
    @RequestMapping(value="/login", method=RequestMethod.POST)
    public int login(){
        return 1;
    }
}

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3. @RequestBody

Haec annotationes solum ad parametri methodi applicari potest et ad corpus petendum notitias obtinendas adhibetur et in parametris injiciat.

@Controller
@RequestMapping("/user")
public class UserController{
    
    @RequestMapping(value="/login", method=RequestMethod.POST)
    public int login(@RequestBody User user){
        return 1;
    }
}

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4. @ResponseBody

Haec adnotatio ad paginam transeundi data est

@Controller
@RequestMapping("/user")
public class UserController{
    
    @RequestMapping(value="/login", method=RequestMethod.POST)
    @ResponseBody
    public int login(@RequestBody User user){
        return 1;
    }
}

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5. @RequestParam

Haec annotationes tantum ad parametri methodi applicari potest et ad notitias ab instantia capitis impetrare et in parametris injicere.

@Controller
@RequestMapping("/user")
public class UserController{
    
    @RequestMapping(value="/search", method=RequestMethod.GET)
    @ResponseBody
    public List<User> searchUsers(@RequestParam(value="name") String name){
        return new ArrayList<>();
    }
}

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6. @PathVariable

Haec annotationes tantum ad parametri methodi applicari potest et ad notitias ab instantia impetranda adhibita et in parametris injicienda est.

@Controller
@RequestMapping("/user")
public class UserController{
    // /user/admin
    @RequestMapping(value="/{username}", method=RequestMethod.GET)
    @ResponseBody
    public User queryUser(@PathVariable("username") String username){
        return new User();
    }
}

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7. @SessionAttributes[non important]

Haec annotationes tantum in definitionibus classium adhiberi potest et in sessionem inputare adhibetur.

@SessionAttributes(types=User.class) //会将model中所有类型为 User的属性添加到会话中。
@SessionAttributes(value={“user1”, “user2”}) //会将model中属性名为user1和user2的属性添加到会话中。
@SessionAttributes(types={User.class, Dept.class}) //会将model中所有类型为 User和Dept的属性添加到会话中。
@SessionAttributes(value={“user1”,“user2”},types={Dept.class}) //会将model中属性名为user1和user2以及类型为Dept的属性添加到会话中。

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8. @RequestHeader

Haec annotationem solum ad parametri methodum applicari potest et ad informationem capitis petendi obtinendam adhibetur.

@RequestMapping("/find")  
public void findUsers(@RequestHeader("Content-Type") String contentType) {//从请求头中获取Content-Type的值
}  

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9. @CookieValue

Haec annotationes solum ad parametri methodum applicari potest et ad valorem crustulum ab instantia obtinendum adhibetur.

@RequestMapping("/find")  
public void findUsers(@CookieValue("JSESSIONID") String jsessionId) {//从请cookie中获取jsessionId的值
}  

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10. @ControllerAdvice

Haec annotationem tantum ad classes applicari potest, indicans hanc classem exceptiones tractantem esse moderatorem.

/**
 * 异常处理的控制器
 */
@ControllerAdvice //这个注解就是spring mvc提供出来做全局异常统一处理的
public class ExceptionController {
}

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11. @ExceptionHandler

Haec adnotatio solum applicari potest ad methodos generum, quae ab @ControllerAdvice vel @RestControllerAdvice ad exceptiones tractandas applicari potest.

/**
 * 异常处理的控制器
 */
@ControllerAdvice //这个注解就是spring mvc提供出来做全局异常统一处理的
public class ExceptionController {

    @ExceptionHandler //异常处理器
    @ResponseBody //响应至页面
    public String handleException(Exception e){
        return e.getMessage();
    }
}

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Sectio 4 JSR-303

1. Introductio ad JSR-303

JSR stat pro Java Specification Requests, in quo proposita specificationem Javam repraesentat. JSR-303 vexillum compages a Java pro Java Bean data validitatem verificationis est definit. Statuto verificationis definit annotationes quae notari possunt in variabilium membrorum et methodorum attributorum. Validator hiberna exsecutionem huius vexillum praebet.

<dependency>
  <groupId>org.hibernate</groupId>
  <artifactId>hibernate-validator</artifactId>
  <version>6.0.1.Final</version>
  <!-- 最新7.0.1.Final -->
</dependency>

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2. comprobatio annotationes

annotationexplicareannotationexplicare
@Nullaoportet esse@NotNullnon potest esse nulla
@AssertTrueoportet esse verum@AssertFalseoportet esse falsum
@MinDebet esse numerus, cuius valor maior est quam vel aequalis ad certum valorem minimum@MaxNumerus cuius valor minor est quam vel aequalis ad certum valorem maximum oportet
@DecimalMinDebet esse numerus, cuius valor maior est quam vel aequalis ad certum valorem minimum@DecimalMaxNumerus cuius valor minor est quam vel aequalis ad certum valorem maximum oportet
@Sizelongitudinem set@DigitsNumerus et eius valor intra range acceptabilem esse debent
@PastOportet diem in praeteritis@FutureOportet esse in posterum diem
@PatternEst expressio aequare iusto@EmailDebet esse in forma inscriptio
@Longitudo(min=,max=)Magnitudinem chordae intra certum rhoncus@NotEmptyNullum esse non potest, longitudo maior est quam 0
@Range(min=,max=,nuntius=)Elementa debent esse in congruo ambitu@NotBlankNullo modo esse potest, chorda longitudinis maior quam 0 (chordis circumscripta)

3. Application

<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-context-support</artifactId>
    <version>5.3.10</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-webmvc</artifactId>
    <version>5.3.10</version>
</dependency>
<dependency>
    <groupId>org.hibernate</groupId>
    <artifactId>hibernate-validator</artifactId>
    <version>6.0.1.Final</version>
</dependency>
<dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>fastjson</artifactId>
    <version>1.2.78</version>
</dependency>
<dependency>
    <groupId>junit</groupId>
    <artifactId>junit</artifactId>
    <version>4.11</version>
    <scope>test</scope>
</dependency>

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<!-- web.xml -->
<servlet>
    <servlet-name>dispatcherServlet</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <init-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:spring-mvc.xml</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
    <servlet-name>dispatcherServlet</servlet-name>
    <url-pattern>/</url-pattern>
</servlet-mapping>

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<?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:mvc="http://www.springframework.org/schema/mvc"
       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/mvc https://www.springframework.org/schema/mvc/spring-mvc.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd">

    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" p:prefix="/" p:suffix=".jsp" />

    <mvc:annotation-driven>
        <mvc:message-converters>
            <!--处理字符串的消息转换器-->
            <bean class="org.springframework.http.converter.StringHttpMessageConverter" />
            <!--处理JSON格式的消息转换器-->
            <bean class="com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter">
                <property name="supportedMediaTypes">
                    <list>
                        <value>text/html;charset=UTF-8</value>
                        <value>application/json;charset=UTF-8</value>
                    </list>
                </property>
            </bean>
        </mvc:message-converters>
    </mvc:annotation-driven>

    <context:component-scan base-package="com.qf.spring.controller" />
</beans>

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import org.hibernate.validator.constraints.Length;
import org.hibernate.validator.constraints.Range;

import javax.validation.constraints.NotNull;

public class User {

    @NotNull(message = "账号不能为空")
    @Length(min = 8, max = 15, message = "账号长度必须为8~15位")
    private String username;

    @NotNull(message = "密码不能为空")
    @Length(min = 8, max = 20, message = "密码长度必须为8~20位")
    private String password;

    @Range(min = 0, max = 120, message = "年龄只能在0~120岁之间")
    private int age;

    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 int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }
}


import org.springframework.stereotype.Controller;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

import javax.validation.Valid;

@Controller
@RequestMapping("/user")
public class UserController {

    @RequestMapping("/add")
    @ResponseBody
    public Object saveUser(@Valid User user, BindingResult result){
        if(result.hasErrors()) return result.getAllErrors();
        return 1;
    }
}

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SECTIO V REQUIES

Ad 1. REQUIES

Plenum nomen est Repraesentativae rei publicae serie, exprimere Status Repraesentativae translationis。

QUIETUS haec habet;

  • Quisque URI constituit resource
  • Cliens utitur GET, POST, PUT et DELETE ad operandum facultates servo: GET usus ad opes obtinendas, POST usus novas facultates creandas (potest etiam ad facultates renovandas), PUT ad opes renovandas et delendas adhibetur. Ad delete opibus

2. QUIETUS petitio

/user GET => 获取用户资源
/user POST => 增加用户资源
/user PUT => 修改用户资源
/user DELETE => 删除用户资源

/user/{username} GET => 获取指定用户资源  这是RESTFUL风格中子资源的表述方式

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3. Veris auxilium pro REQUIES

3.1 @RestController

Haec annotationes tantum ad classes applicari potest et cum compositione @Controller et @ResponseBody annotationes aequivalet.Indicat eventus redditus postquam omnes methodos in hoc genere exsecutioni mandari directe ad paginam.

3.2 @GetMapping
3.2 @PostMapping
3.2 @PutMapping
3.2 @DeleteMapping

Sectio VI Static Resource Processing

1. Rationes cur subsidia stabilia non possunt accessed

Facultates static includunt html, js, css, imagines, font files, etc. Tabulae statice URL-formae non habent, quare per defaltam adeunda non sunt. Causa quare accedere potest, est quia servulus globalis in tomcat: org.apache.catalina.servlets.DefaultServlet. Eius url-forma est "/", ergo petitiones subsidiorum statice quae in incepto aequari non possunt omnes sunt. tractata hac Servlet. Sed in SpringMVC, DispatcherServlet etiam "/" ut url-pattern utitur, ita global Serlvet non amplius in incepto adhibebitur, quod proventus in opibus static accessi non valentes sunt.

2. Solutiones

2.1 Option 1

Mutare modo URL-exemplari cum DispathcerServlet correspondentem ad exemplar aliud adaptans quam "/". Eg *.do, *.actio. Post hanc modificationem, cum petitionem mittens, URL petitionem .do vel .actioni aequare debet.

2.2 Option 2
<!-- web.xml -->
<servlet-mapping>
    <servlet-name>default</servlet-name>
    <url-pattern>/static/*</url-pattern>
  </servlet-mapping>

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2.2 Option 3
<!-- spring-mvc.xml -->
<!-- 
这个handler就是处理静态资源的，它的处理方式就是将请求转会到tomcat中名为default的Servlet 
-->
<mvc:default-servlet-handler/>
<!-- mapping是访问路径，location是静态资源存放的路径 -->
<mvc:resources mapping="/static/**" location="/static/" />

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Titulus VII Chinese garbled processus codice

<?xml version="1.0" encoding="UTF-8"?>
<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">
  <display-name>Archetype Created Web Application</display-name>
  <servlet>
    <servlet-name>dispatcherServlet</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <init-param>
      <param-name>contextConfigLocation</param-name>
      <param-value>classpath:spring-mvc.xml</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
    <servlet-name>dispatcherServlet</servlet-name>
    <url-pattern>/</url-pattern>
  </servlet-mapping>

  <filter>
    <filter-name>encodingFilter</filter-name>
    <!--字符编码过滤器-->
    <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
    <init-param>
      <!--编码格式-->
      <param-name>encoding</param-name>
      <param-value>UTF-8</param-value>
    </init-param>
    <init-param>
      <!--强制编码-->
      <param-name>forceEncoding</param-name>
      <param-value>true</param-value>
    </init-param>
  </filter>
  <filter-mapping>
    <filter-name>encodingFilter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>
</web-app>

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Sectio VIII Spring MVC principium operandi

checkMultipart(request); //检测是否是多部分请求，这个只可能在文件上传的时候为真


getHandler(processedRequest); //获取处理器 => 遍历HandlerMapping，找到匹配当前请求的执行器链
//没有找到执行器链 就直接向页面报一个404
noHandlerFound(processedRequest, response);
//找到处理当前请求的适配器
HandlerAdapter ha = getHandlerAdapter(mappedHandler.getHandler());

//控制器之前执行的拦截器将先执行，如果拦截器不通过，则方法直接结束
if (!mappedHandler.applyPreHandle(processedRequest, response)) {
    return;
}
//控制器处理请求，可能会得到一个ModelAndView
mv = ha.handle(processedRequest, response, mappedHandler.getHandler());

//控制器之后的拦截器执行
mappedHandler.applyPostHandle(processedRequest, response, mv);
//处理分发的结果：这个结果就是控制器处理后的结果
processDispatchResult(processedRequest, response, mappedHandler, mv, dispatchException);
//拦截器在控制器给出的结果DispatcherServlet处理后执行
triggerAfterCompletion(processedRequest, response, mappedHandler, ex);

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Personal profile

technologiae technologiae plus quam 30 annos operam dedit et in variis linguis proficit ut java, linux, javascript, php, css, etc. Multas contributiones in aperto fonte campo fecit elit documentorum statione ad communicandas quaestiones in technologia progressus ad futuram referentiam.

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