SpringMVC——json数据传递参数-开发者社区

json数组

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/maven-v4_0_0.xsd"><modelVersion>4.0.0</modelVersion><groupId>org.example</groupId><artifactId>springmvc_04_request_param</artifactId><packaging>war</packaging><version>1.0-SNAPSHOT</version><name>springmvc_04_request_paramMavenWebapp</name><url>http://maven.apache.org</url><dependencies><dependency><groupId>javax.servlet</groupId><artifactId>javax.servlet-api</artifactId><version>3.1.0</version><scope>provided</scope></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-webmvc</artifactId><version>5.2.10.RELEASE</version></dependency><dependency><groupId>com.fasterxml.jackson.core</groupId><artifactId>jackson-databind</artifactId><version>2.9.0</version></dependency></dependencies><build><plugins><plugin><groupId>org.apache.tomcat.maven</groupId><artifactId>tomcat7-maven-plugin</artifactId><version>2.1</version><configuration><port>80</port><path>/</path></configuration></plugin></plugins></build></project>

ServletContainersInitConfig

package com.baidu.config;importorg.springframework.web.filter.CharacterEncodingFilter;importorg.springframework.web.servlet.support.AbstractAnnotationConfigDispatcherServletInitializer;importjavax.servlet.Filter;publicclassServletContainersInitConfigextendsAbstractAnnotationConfigDispatcherServletInitializer{protectedClass<?>[]getRootConfigClasses(){returnnewClass[0];}protectedClass<?>[]getServletConfigClasses(){returnnewClass[]{SpringMvcConfig.class};}protectedString[]getServletMappings(){returnnewString[]{"/"};}protectedFilter[]getServletFilters(){CharacterEncodingFilterfilter=newCharacterEncodingFilter();filter.setEncoding("UTF-8");returnnewFilter[]{filter};}}

SpringMvcConfig

@EnableWebMvc注解功能强大，整合了多个功能，这里只用到了json数据进行自动类型转换功能

UserController

package com.baidu.controller;importcom.baidu.domain.User;importorg.springframework.stereotype.Controller;importorg.springframework.web.bind.annotation.RequestBody;importorg.springframework.web.bind.annotation.RequestMapping;importorg.springframework.web.bind.annotation.RequestParam;importorg.springframework.web.bind.annotation.ResponseBody;importjava.util.Arrays;importjava.util.List;@ControllerpublicclassUserController{@RequestMapping("/listParamForJson")@ResponseBodypublicStringlistParamForJson(@RequestBodyList<String>likes){System.out.println("json ==> "+likes);return"'module':'list common for json param'}";}// @RequestMapping("/commonParam")// @ResponseBody// public String commonParam(String name, int age) {// System.out.println("name=>" + name);// System.out.println("age=>" + age);// return "{'module':'common param'}";// }// // 普通参数：请求参数名与形参名不同// @RequestMapping("/commonParamDifferentName")// @ResponseBody// public String commonParamDifferentName(@RequestParam("name") String userName, int age) {// System.out.println("userName=>" + userName);// System.out.println("age =>" + age);// return "{'module':'common param different name'}";// }////// @RequestMapping("/pojoParam")// @ResponseBody// public String pojoParam(User user){// System.out.println(" user ==> " + user);// return "{'module':'pojo param' }" ;// }// @RequestMapping("/arrayParam")// @ResponseBody// public String arrayParam(String[] likes){// System.out.println("likes ==> " + Arrays.toString(likes));// return "{'module':'array param'}";// }// @RequestMapping("/listParam")// @ResponseBody// public String listParam(@RequestParam List<String> likes){// System.out.println("likes ===> " + likes);// return "{'module': 'list param' }";// }}

@RequestBody是将请求中请求体所包含的数据传递给请求参数，此注解一个处理器方法只能使用一次

json对象（POJO）

User

package com.baidu.domain;publicclassUser{privateStringname;private int age;privateAddressaddress;publicUser(){}publicUser(Stringname,int age,Addressaddress){this.name=name;this.age=age;this.address=address;}/** * 获取 * @return name */publicStringgetName(){returnname;}/** * 设置 * @param name */publicvoidsetName(Stringname){this.name=name;}/** * 获取 * @return age */public intgetAge(){returnage;}/** * 设置 * @param age */publicvoidsetAge(int age){this.age=age;}/** * 获取 * @return address */publicAddressgetAddress(){returnaddress;}/** * 设置 * @param address */publicvoidsetAddress(Addressaddress){this.address=address;}publicStringtoString(){return"User{name = "+name+", age = "+age+", address = "+address+"}";}}

Address

package com.baidu.domain;publicclassAddress{privateStringprovince;privateStringcity;publicAddress(){}publicAddress(Stringprovince,Stringcity){this.province=province;this.city=city;}/** * 获取 * @return province */publicStringgetProvince(){returnprovince;}/** * 设置 * @param province */publicvoidsetProvince(Stringprovince){this.province=province;}/** * 获取 * @return city */publicStringgetCity(){returncity;}/** * 设置 * @param city */publicvoidsetCity(Stringcity){this.city=city;}publicStringtoString(){return"Address{province = "+province+", city = "+city+"}";}}