Spring-MVC配置（二）
|字数总计:1.5k|阅读时长:7分钟|阅读量:|
SpringMVC基础配置
上一节已经将SpringMVC的框架搭好了，就不再多说
接收参数
url中的参数
请求路径为http://127.0.0.1/user/test?name=john&age=10
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@RequestMapping("/user/test")
@ResponseBody
public String save(@RequestParam(value = "name") String name,@RequestParam(value = "age") Integer age) {
System.out.println("name:" + name + ",age:" + age);
return "/user/test";
}
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表单中的参数
与url中的参数的访问方式一样
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@RequestMapping("/user/test")
@ResponseBody
public String save(@RequestParam(value = "name") String name,@RequestParam(value = "age") Integer age) {
System.out.println("name:" + name + ",age:" + age);
return "/user/test";
}
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数组
请求路径为http://127.0.0.1/user/test?likes=game&likes=tv&likes=reading
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@RequestMapping("/user/test")
@ResponseBody
public String save(@RequestParam(value = "likes") List<String> likes) {
System.out.println(likes);
return "/user/test";
}
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用对象的属性接收
使用对象的属性接收，属性变量名必须与参数名相同，否则不会识别
请求路径为http://127.0.0.1/user/test?name=john&age=20&balance=100&gender=male&address.province=sichuan&address.city=chengdu
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@RequestMapping("/user/test")
@ResponseBody
public String save(User user) {
System.out.println(user);
return "/user/test";
}
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打印如下
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| User{id=null, name='john', gender='male', age=20, phone='null', birthday=null, balance=100.0, address=Address{province='sichuan', city='chengdu'}}
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接收时间类型的参数
请求路径为http://127.0.0.1/user/test?date=2001/06/24
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@RequestMapping("/user/test")
@ResponseBody
public String save(@DateTimeFormat(pattern = "yyyy/MM/dd") Date date) {
System.out.println(date);
return "/user/test";
}
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打印如下
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| Sun Jun 24 00:00:00 CST 2001
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全局配置
配置json数据的读取
导入jackson坐标用于json处理
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<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.9.0</version>
</dependency>
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在org.example.config.SpringMvcConfig中开启功能
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| package org.example.config;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
@Configuration
@ComponentScan({"org.example.controller"})
@EnableWebMvc
public class SpringMvcConfig {
}
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设置json格式的请求，在json格式的请求体中写入以下信息
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| {
"name":"马昆",
"gender":"male",
"age": 21,
"phone":"19960798888",
"birthday":"2001-06-24",
"balance":100.00,
"address": {
"province":"四川",
"city":"眉山"
}
}
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控制器接收
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@RequestMapping("/user/test")
@ResponseBody
public String save(@RequestBody User user) {
System.out.println(user);
return "/user/test";
}
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json格式数据的发送
创建一个专属的消息类org.example.domain.JsonResult
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| package org.example.domain;
public class JsonResult {
private Integer code;
private String message;
private Object data;
public JsonResult() {
}
public JsonResult(Integer code, String message, Object data) {
this.code = code;
this.message = message;
this.data = data;
}
@Override
public String toString() {
return "JsonResult{" +
"code=" + code +
", message='" + message + '\'' +
", data=" + data +
'}';
}
public Integer getCode() {
return code;
}
public void setCode(Integer code) {
this.code = code;
}
public String getMessage() {
return message;
}
public void setMessage(String message) {
this.message = message;
}
public Object getData() {
return data;
}
public void setData(Object data) {
this.data = data;
}
}
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更改控制器方法的返回值
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@RequestMapping("/user/test")
@ResponseBody
public JsonResult save(@RequestBody User user) {
return new JsonResult(200, "配置成功！", user);
}
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如果请求的格式正确，出现返回以下结果，时间格式传递的是一个时间戳
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| {
"code": 200,
"message": "配置成功！",
"data": {
"id": null,
"name": "马昆",
"gender": "male",
"age": 21,
"phone": "19960798888",
"birthday": 993340800000,
"balance": 100.0,
"address": {
"province": "四川",
"city": "眉山"
}
}
}
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解析中文
在请求体中增加中文字段，出现以下情况
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| {
"code": 200,
"message": "配置成功！",
"data": "ä¸æ"
}
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在org.example.config.ServletControllerInitConfig中添加过滤器
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@Override
protected Filter[] getServletFilters() {
CharacterEncodingFilter encodingFilter = new CharacterEncodingFilter();
encodingFilter.setEncoding("UTF-8");
return new Filter[]{encodingFilter};
}
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重启服务再次访问，数据获取正常
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| {
"code": 200,
"message": "配置成功！",
"data": "中文"
}
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