使用<spring:bind>标签绑定验证数据

Spring初学者指南
本文针对Spring框架初学者,解析了如何使用&lt;spring:bind&gt;进行数据绑定,并介绍了默认对象'command'的作用及如何通过setCommandName方法自定义名称。

刚开始学习spring,迷迷糊糊的看着各种配置,按照书上的例子弄了下来,虽然可以正常使用,但是还是有一些地方不明白。

比如使用<spring:bind>时的path属性,书上默认设置为<spring:bind path="command.username">,但是这个command是从哪里来的呢?后来去网上搜索了一下,这个command是默认用来指定jsp页面的数据绑定的那个对象,你可以在controller中修改使用setCommandName("loginform")来修改这个名字,这里的loginform是你想用的名字,然后你在jsp页面就可以绑定为:<spring:bind path="loginform.username">.

实验十二 SpringMVC 一、实验目的 1、掌握SpringMVC项目构建 2、掌握SpringMVC数据接收与传递的原理 二、实验过程 1、配置SpringMVC开发环境 a)创建新的项目,TestSpringMvc b)为项目添加Web框架和SpringMVC框架 c)添加classes目录 d)添加javaee依赖 e)添加lib输出配置 将依赖文件添加至lib中 f)修改web.xml配置 <?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"> <context-param> <param-name>contextConfigLocation</param-name> <param-value>/WEB-INF/applicationContext.xml</param-value> </context-param> <servlet> <servlet-name>dispatcher</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param> <param-name>contextConfigLocation</param-name> <param-value>/WEB-INF/applicationContext.xml</param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>dispatcher</servlet-name> <url-pattern>*.form</url-pattern> </servlet-mapping> <filter> <filter-name>charactorEncoding</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>charactorEncoding</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> </web-app> g)修改applicationContext.xml <?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:context="http://www.springframework.org/schema/context" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:tx="http://www.springframework.org/schema/tx" 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/aop http://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd"> <mvc:annotation-driven /> <mvc:default-servlet-handler /> <context:annotation-config></context:annotation-config> <context:component-scan base-package="cs18.controller"/> </beans> h)添加controller,TestController.java @Controller public class TestController { @RequestMapping(value = "/showName") public String showName(HttpServletRequest request, HttpServletResponse response) { //访问传递的参数 ; return "index.jsp"; } } i)配置tomcat,添加项目部署 j)启动tomcat,在浏览器中输入以下地址 http://localhost:8080/TestSpringMvc/showName?name=fredy 2、测试以下不同类型数据绑定方法 a)HttpServletRequet,HttpSession,Model/ModelMap b)简单数据类型绑定(int,String等) c)POJO数据绑定 d)包装POJO数据绑定 e)自定义数据类型绑定 f)数组或集合绑定 g)使用Json风格类型的数据绑定
06-11
<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd "> <modelVersion>4.0.0</modelVersion> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>3.5.0</version> <relativePath/> <!-- lookup parent from repository --> </parent> <groupId>com.itheima</groupId> <artifactId>heima-ai</artifactId> <version>0.0.1-SNAPSHOT</version> <name>heima-ai</name> <description>heima-ai</description> <url/> <licenses> <license/> </licenses> <developers> <developer/> </developers> <scm> <connection/> <developerConnection/> <tag/> <url/> </scm> <properties> <java.version>17</java.version> <spring-ai.version>1.0.0</spring-ai.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.ai</groupId> <artifactId>spring-ai-starter-model-ollama</artifactId> </dependency> <dependency> <groupId>com.mysql</groupId> <artifactId>mysql-connector-j</artifactId> <scope>runtime</scope> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <version>1.18.26</version> </dependency> </dependencies> <dependencyManagement> <dependencies> <dependency> <groupId>org.springframework.ai</groupId> <artifactId>spring-ai-bom</artifactId> <version>${spring-ai.version}</version> <type>pom</type> <scope>import</scope> </dependency> </dependencies> </dependencyManagement> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project>这是我的pom.xml,这是我的代码package com.itheima.ai.controller; import org.springframework.ai.chat.client.ChatClient; import org.springframework.ai.chat.memory.ChatMemory; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RestController; import reactor.core.publisher.Flux; @RestController @RequestMapping("/ai") public class ChatController { private final ChatClient chatClient; private final ChatMemory chatMemory; public ChatController(ChatClient chatClient, ChatMemory chatMemory) { this.chatClient = chatClient; this.chatMemory = chatMemory; } @RequestMapping(value = "/chat", produces = "text/html;charset=utf-8") public Flux<String> chat(String prompt, String chatId) { return chatClient.prompt() .user(prompt) .advisors(a -> a .param(ChatMemory.CONVERSATION_ID, chatId) .param(ChatMemory.TOP_K, 100) // 设置返回的消息数量 ) .stream() .content(); } },请你修改我的代码,让我的代码适配
05-31
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