spring mvc学习（52）：json数据类型提交_spring提交某个字段是json-CSDN博客

本文链接：https://blog.csdn.net/weixin_43392489/article/details/103116005

本文介绍了如何在Spring MVC中处理JSON数据类型的提交，包括引入相关jar包，配置web.xml和springMVC-servlet.xml，自定义Date和User的Convertor类，以及在UserController中进行操作。同时，文章还涉及了Address和User实体类的创建，以及使用jQuery和JSP页面（如form.jsp, home.jsp, success.jsp, list.jsp, add.jsp, edit.jsp）实现前端交互和展示。最后展示了运行结果。" 79346673,6677966,二叉树详解：概念、性质与应用,"['数据结构', '二叉树', '算法', '树的高度', '表达式求值']

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引入jar包

pom.xml

<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>com.geyao</groupId>
  <artifactId>springmaven</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <dependencies>
 <dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-webmvc</artifactId>
    <version>4.2.8.RELEASE</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-context</artifactId>
    <version>4.2.8.RELEASE</version>
</dependency>
<dependency>  
        <groupId>javax.servlet</groupId>  
        <artifactId>servlet-api</artifactId>  
        <version>2.5</version>  
    </dependency>  
    <dependency>  
        <groupId>javax.servlet</groupId>  
        <artifactId>jsp-api</artifactId>  
        <version>2.0</version>  
    </dependency>  
    
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-core</artifactId>
    <version>4.2.8.RELEASE</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-beans</artifactId>
    <version>4.2.8.RELEASE</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-web</artifactId>
    <version>4.2.8.RELEASE</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-aop</artifactId>
    <version>4.2.8.RELEASE</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-expression</artifactId>
    <version>4.2.8.RELEASE</version>
</dependency>
<dependency>
          <groupId>org.apache.taglibs</groupId>
          <artifactId>taglibs-standard-spec</artifactId>
          <version>1.2.5</version>
        </dependency>
        <dependency>
          <groupId>org.apache.taglibs</groupId>
          <artifactId>taglibs-standard-impl</artifactId>
          <version>1.2.5</version>
        </dependency>
         <dependency>
          <groupId>jstl</groupId>
          <artifactId>jstl</artifactId>
          <version>1.1.2</version>
        </dependency>
  </dependencies>
</project>

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
    <display-name>Springmaven01</display-name>
 <welcome-file-list>
  <welcome-file>/WEB-INF/jsp/home.jsp</welcome-file>
 </welcome-file-list>
 
   
 
    <!-- 处理中文乱码 -->
    <filter>
        <filter-name>encodingFilter</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>encodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
    <!-- SpringMVC控制器 -->
    <servlet>
        <servlet-name>dispatcherServlet</servlet-name>
        <!-- 主要就是DispatcherServlet这个servlet起到分发的作用，对请求进行控制分发 -->
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <!-- 每个springmvc项目都要一个springmvc项目配置位置，下面配置springmvc配置文件的路径 -->
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath*:springMVC-servlet.xml</param-value>
        </init-param>
        <!-- 当容器启动时立即启动 -->
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>dispatcherServlet</servlet-name>
        <!-- 下面配置springmvc的过滤分发请求类型，可以是/ 或者*.action等 -->
        <url-pattern>/</url-pattern>
    </servlet-mapping>
  <filter>
       <filter-name>HiddenHttpMethodFilter</filter-name>
       <filter-class>org.springframework.web.filter.HiddenHttpMethodFilter</filter-class>
   </filter>
 
   <filter-mapping>
       <filter-name>HiddenHttpMethodFilter</filter-name>
       <url-pattern>/*</url-pattern>
   </filter-mapping>

</web-app>

springMVC-servlet

<?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-4.1.xsd
        http://www.springframework.org/schema/mvc 
        http://www.springframework.org/schema/mvc/spring-mvc-4.1.xsd">
    <!-- 定义要扫描 controller的包-->
    <context:component-scan base-package="wormday.springmvc.helloworld" />
    
      <!-- 定义要扫描 controller的包-->
 	<context:component-scan base-package="wormday.springmvc.dao" />
 
    <!-- 配置视图解析器 如何把handler 方法返回值解析为实际的物理视图 -->
    <!--指定视图解析器-->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <!-- 视图的路径 -->
        <property name="prefix" value="/WEB-INF/jsp/"/>
        <!-- 视图名称后缀  -->
        <property name="suffix" value=".jsp"/>
    </bean>
   
 	<!-- 配置注解驱动 -->
 	<mvc:annotation-driven conversion-service="myConversion"></mvc:annotation-driven>
 	 <!-- 类型转换期 -->
    <bean id="myConversion" class="org.springframework.format.support.FormattingConversionServiceFactoryBean">
    	<property name="converters">
    	<set>
    	<!--  <bean class="wormday.spring.convertor.DateConvertor"></bean>-->
    	<bean class="wormday.spring.convertor.UserConvertor"></bean>
    	</set>
    	</property>
    </bean>
 	<!-- 处理静态资源 -->
 	<mvc:resources location="/libs/" mapping="/libs/**"></mvc:resources>
 	<!-- 处理器适配器  
 	<bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter"></bean>
 	 处理器映射器  
 	<bean class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping"></bean>
 	--> 
</beans>

DateConvertor类

package wormday.spring.convertor;

import java.util.*;
import java.text.SimpleDateFormat;

import org.springframework.core.convert.converter.Converter;




public class DateConvertor implements Converter<String, Date>{
	//将日期格式转换为字符串格式
	
	public Date convert(String source) {
		SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
		try {
			sdf.setLenient(false);//是否宽松解析
				return sdf.parse(source);
		}catch (Exception e) {
			e.printStackTrace();
		}
		return null;
	}

}

UserConvertor类

package wormday.spring.convertor;

import java.util.*;
import java.text.SimpleDateFormat;

import org.springframework.core.convert.converter.Converter;

import wormday.springmvc.pojo.User;




public class UserConvertor implements Converter<String, User>{
	//将日期格式转换为字符串格式
	
	
	public User convert(String source) {
		System.out.println("user格式转化器");
		if(source!=null) {
			String[] split=source.split("-");
			if(split !=null&&split.length ==3) {
				String username=split[0];
				Integer age=Integer.parseInt(split[1]);
				String email=split[2];
				//String birthday=split[3];
				
				User user=new User();
				user.setUsername(username);
				user.setAge(age);
				user.setEmail(email);
				//user.setBirthday(birthday);
				return user;
			}
			
		}
		return null;
	}
}

userDao类

package wormday.springmvc.dao;

import java.util.Collection;
import java.util.HashMap;
import java.util.Map;

import org.springframework.stereotype.Repository;

import wormday.springmvc.pojo.Address;
import wormday.springmvc.pojo.User;
@Repository
public class UserDao {
	private static Map<Integer, User> users =null;
	//@Autowired
	static{
		users = new HashMap<Integer, User>();
		users.put(1001, new User(1001,"helen","123","123@qq.com",12,new Address(1,"黑龙江","哈尔冰" )));
		users.put(1002, new User(1002,"helen","123","123@qq.com",12,new Address(1,"黑龙江","哈尔冰" )));
		users.put(1003, new User(1003,"helen","123","123@qq.com",12,new Address(1,"黑龙江","哈尔冰" )));
	}
	private static Integer initId =1004;
	public void save(User user) {
		if(user.getId()==null) {
			user.setId(initId++);
		}
		users.put(user.getId(),user);
	}
	public Collection<User> getAll(){
		return users.values();
	}
	public User get(Integer id) {
		return users.get(id);
	}
	public void delete(Integer id) {
		users.remove(id);
	}
}

indexController类

package wormday.springmvc.helloworld;
 
import javax.servlet.http.HttpSession;

import org.springframework.stereotype.Controller;

import org.springframework.web.bind.annotation.RequestMapping;
 
@Controller
@RequestMapping("/test")  
public class IndexController {
 
	@RequestMapping("/index")  
    public String say(HttpSession session) { 
       System.out.print(session.getId());
        return "home";
    }
}

UserController类

package wormday.springmvc.helloworld;
import java.io.IOException;
import java.util.Collection;
import javax.servlet.http.HttpServletResponse;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import com.google.gson.Gson;
import wormday.springmvc.dao.UserDao;
import wormday.springmvc.pojo.User;
@Controller
///@RequestMapping("/user")
//@SessionAttributes(value= {"user"},types= {String.class})
public class UserController {
	
@Autowired
private UserDao userDao;

	
	@RequestMapping(value="/users",method=RequestMethod.GET)
	public String list(Model model) {
		Collection<User> userList=userDao.getAll();
		model.addAttribute("userList",userList);
		return "user/list";
	}
	
	@RequestMapping(value="/users-jsonp",method=RequestMethod.GET)
	public void listjson(String callback,HttpServletResponse response) throws IOException{
		Collection<User> list = userDao.getAll();
		Gson gson=new Gson();
		String json=gson.toJson(list);
		response.getWriter().println(callback+"("+ json +")");
	}
	
	@RequestMapping(value="/user/{id}",method=RequestMethod.DELETE)
	public String delete(@PathVariable(value="id")Integer id) {
		//执行删除
		System.out.println("delete"+id);
		userDao.delete(id);
		return "redirect:/users";
	}
	
	@RequestMapping(value="/user",method=RequestMethod.GET)
	public String add() {
		//执行删除
		System.out.println("add");
		
		return "user/add";
	}
	@RequestMapping(value="/user",method=RequestMethod.POST)
	public String save(User user) {
		//执行保存
		
		System.out.println("save");
		System.out.print(user);
		return "redirect:/users";
	}
	//编辑
	@RequestMapping(value="/user/{id}",method=RequestMethod.GET)
	public String edit(@PathVariable(value="id")Integer id,Model model) {
		//执行更新
		System.out.println("edit");
		User user=userDao.get(id);
		model.addAttribute("user", user);
		return "user/edit";
	}
	
	@RequestMapping(value="/user/{id}",method=RequestMethod.PUT)
	public String update(@PathVariable(value="id")Integer id,User user) {
		System.out.println("update");
		user.setId(id);
		userDao.save(user);
		return "redirect:/users";
	}
	@RequestMapping(value="/saveuser",method=RequestMethod.POST)
	public String saveuser(User user) {
		
		System.out.print(user);
		System.out.println("save");
		userDao.save(user);
	return "redirect:/users";
	}
	@RequestMapping(value="/user-json",method=RequestMethod.POST)
	public String savejson(@RequestBody User user) {
		//执行保存
		System.out.println(user);
		System.out.println("save");
		userDao.save(user);
		return "redirect:/users";
	}
}

Address类

package wormday.springmvc.pojo;

public class Address {
	private Integer id;
	private String province;
	public String getProvince() {
		return province;
	}
	
	public Integer getId() {
		return id;
	}

	public void setId(Integer id) {
		this.id = id;
	}

	public void setProvince(String province) {
		this.province = province;
	}
	public String getCity() {
		return city;
	}
	public void setCity(String city) {
		this.city = city;
	}
	private String city;
	public Address() {
		super();
	}

	@Override
	public String toString() {
		return "Address [id=" + id + ", province=" + province + ", city=" + city + "]";
	}

	public Address(Integer id, String province, String city) {
		super();
		this.id = id;
		this.province = province;
		this.city = city;
	}

	
}

user类

package wormday.springmvc.pojo;

import java.util.Date;



public class User {
	public User() {
		super();
		// TODO Auto-generated constructor stub
	}
	private Integer id;
	private String username;
	private String password;
	private String email;
	private Integer age;
	private Address address;
	
	
	private Date birthday;
	
	public Date getBirthday() {
		return birthday;
	}
	public void setBirthday(Date birthday) {
		this.birthday = birthday;
	}
	public Integer getId() {
		return id;
	}
	public void setId(Integer id) {
		this.id = id;
	}
	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 String getEmail() {
		return email;
	}
	public void setEmail(String email) {
		this.email = email;
	}
	public Integer getAge() {
		return age;
	}
	public void setAge(Integer age) {
		this.age = age;
	}
	
	public Address getAddress() {
		return address;
	}
	public void setAddress(Address address) {
		this.address = address;
	}
	@Override
	public String toString() {
		return "User [id=" + id + ", username=" + username + ", password=" + password + ", email=" + email + ", age="
				+ age + ", address=" + address + ", birthday=" + birthday + "]";
	}
	
	public User(Integer id, String username, String password, String email, Integer age, Address address
			) {
			super();
			this.id = id;
			this.username = username;
			this.password = password;
			this.email = email;
			this.age = age;
			this.address = address;
		
		}
	
		
	
}

jquery.min.js

/*! jQuery v1.6.4 http://jquery.com/ | http://jquery.org/license */
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