SpringMVC类型参数及json参数传递
不会压弯的小飞侠 人气:0学习内容:
1.普通参数
2.pojo参数
3.嵌套pojo
4.数组参数
5.集合参数
6.解决中文乱码
7.json数据传递参数
案例分析:
1.pom.xml
<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>org.example</groupId> <artifactId>SpringMVC-Demo1</artifactId> <version>1.0-SNAPSHOT</version> <packaging>war</packaging> <dependencies> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>5.2.22.RELEASE</version> </dependency> <dependency> <groupId>javax.servlet</groupId> <artifactId>javax.servlet-api</artifactId> <version>4.0.1</version> <scope>provided</scope> </dependency> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-databind</artifactId> <version>2.13.3</version> </dependency> </dependencies> </project>
2.ServletContainersInitConfig
package com.study.config; import org.springframework.web.filter.CharacterEncodingFilter; import org.springframework.web.servlet.support.AbstractAnnotationConfigDispatcherServletInitializer; import javax.servlet.Filter; public class ServletContainersInitConfig extends AbstractAnnotationConfigDispatcherServletInitializer { @Override protected Class<?>[] getRootConfigClasses() { return new Class[0]; } @Override protected Class<?>[] getServletConfigClasses() { return new Class[]{SpringMvcConfig.class}; } @Override protected String[] getServletMappings() { return new String[]{"/"}; } @Override protected Filter[] getServletFilters() { CharacterEncodingFilter filter = new CharacterEncodingFilter(); filter.setEncoding("UTF-8"); return new Filter[]{filter}; } } /* public class ServletContainersInitConfig extends AbstractDispatcherServletInitializer { //加载SpringMVC容器配置 @Override protected WebApplicationContext createServletApplicationContext() { AnnotationConfigWebApplicationContext ctx = new AnnotationConfigWebApplicationContext(); ctx.register(SpringMvcConfig.class); return ctx; } //设置哪些请求可以归属SpringMVC处理 @Override protected String[] getServletMappings() { return new String[]{"/"}; } //加载Spring容器配置 @Override protected WebApplicationContext createRootApplicationContext() { AnnotationConfigWebApplicationContext ctx = new AnnotationConfigWebApplicationContext(); ctx.register(SpringConfig.class); return ctx; } }*/
3.SpringMvcConfig
package com.study.config; import org.springframework.context.annotation.ComponentScan; import org.springframework.context.annotation.Configuration; @Configuration @ComponentScan("com.study.controller") public class SpringMvcConfig { }
4.UserController
package com.study.controller; import com.study.domain.User; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestParam; import org.springframework.web.bind.annotation.ResponseBody; import java.util.Arrays; import java.util.List; @Controller public class UserController { //1.普通参数传递 @RequestMapping("/commonParam") @ResponseBody public String commonParam(String name,int age){ System.out.println("普通参数传递name:"+name); System.out.println("普通参数传递age:"+age); return "'module':'common param'"; //http://localhost:8080/SpringMVC_Demo3/commonParam?name=tom&age=13 普通参数传递name:jack 普通参数传递age:13 } //2.pojo参数传递 @RequestMapping("/pojo") @ResponseBody public String pojoParam(User user){ System.out.println("pojo参数传递user:"+user); return "'module':'pojo.....'"; //http://localhost:8080/SpringMVC_Demo3/pojo?name=%E5%B0%8F%E9%A3%9E%E4%BE%A0&age=13 //pojo参数传递user:User{name='小飞侠', age=13} } // 3.嵌套pojo参数 @RequestMapping("/pojos") @ResponseBody public String pojosParam(User user){ System.out.println("pojos参数传递user:"+user); return "'module':'pojos.....'"; //http://localhost:8080/SpringMVC_Demo3/pojos?name=%E5%B0%8F%E9%A9%AC%E5%93%A5&age=13&address.province=%E6%B2%B3%E5%8D%97&address.city=%E5%95%86%E4%B8%98 //pojo参数传递user:User{name='小马哥', age=13, address=Address{province='河南', city='商丘'}} } //4.数组参数传递 @RequestMapping("/arr") @ResponseBody public String array(String [] arr){ System.out.println("数组参数传递arr:"+ Arrays.toString(arr)); return "'module':'array.....'"; //http://localhost:8080/SpringMVC_Demo3/arr?arr=1&arr=2&arr=3 //数组参数传递arr:[1, 2, 3] } //5.集合参数 @RequestMapping("/coll") @ResponseBody public String collection(@RequestParam List<String> colls){ System.out.println("集合参数传递colls:"+colls); return "'module':'collection.....'"; //http://localhost:8080/SpringMVC_Demo3/coll?colls=1&colls=2&colls=3 //集合参数传递colls:[1, 2, 3] } //6.pojo参数:json格式 @RequestMapping("/json") @ResponseBody public String json(User user) throws JsonProcessingException { ObjectMapper objectMapper = new ObjectMapper(); String json = objectMapper.writeValueAsString(user); System.out.println(json); return "'module':'json.....'"; //http://localhost:8080/SpringMVC_Demo3/json?name=小马哥&age=23&address.province=河南&address.city=商丘 //{"name":"小马哥","age":23,"address":{"province":"河南","city":"商丘"}} } }
5.Address
package com.study.domain; public class Address { private String province; private String city; public String getProvince() { return province; } public void setProvince(String province) { this.province = province; } public String getCity() { return city; } public void setCity(String city) { this.city = city; } @Override public String toString() { return "Address{" + "province='" + province + '\'' + ", city='" + city + '\'' + '}'; } }
6.User
package com.study.domain; public class User { private String name; private int age; private Address address; public Address getAddress() { return address; } public void setAddress(Address address) { this.address = address; } public String getName() { return name; } public void setName(String name) { this.name = name; } public int getAge() { return age; } public void setAge(int age) { this.age = age; } @Override public String toString() { return "User{" + "name='" + name + '\'' + ", age=" + age + ", address=" + address + '}'; } }
加载全部内容