获取请求体中json数据并解析到实体对象

前端代码

axios.js

/* axios v0.18.0 | (c) 2018 by Matt Zabriskie */
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//# sourceMappingURL=axios.min.map

发起POST请求

<!DOCTYPE html>
<html lang="en"><head><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>Document</title><script src="js/axios.js"></script>
</head><body><input type="button" value="发起POST请求" onclick="post()">
</body><script>function post() {axios({method: "post",url: "http://localhost:8080/test",data: {"username": "艾伦","password": "123abc"}}).then(result => {console.log(result.data)})}
</script></html>

后端代码

解决跨域问题

import jakarta.servlet.*;
import jakarta.servlet.annotation.WebFilter;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import org.springframework.stereotype.Component;import java.io.IOException;@Component
@WebFilter("/*")
public class MyFilter implements Filter {@Overridepublic void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {HttpServletRequest request = (HttpServletRequest) servletRequest;HttpServletResponse response = (HttpServletResponse) servletResponse;response.setHeader("Access-control-Allow-Origin", request.getHeader("Origin"));response.setHeader("Access-Control-Allow-Methods", "GET,POST,OPTIONS,PUT,DELETE,PATCH");response.setHeader("Access-Control-Allow-Headers", request.getHeader("Access-Control-Request-Headers"));filterChain.doFilter(servletRequest, servletResponse);}
}

封装实体类

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;@AllArgsConstructor
@Data
@NoArgsConstructor
public class UserLogin {private String username;private String password;
}

测试接口

import com.alibaba.fastjson.JSONObject;
import jakarta.servlet.ServletInputStream;
import jakarta.servlet.http.HttpServletRequest;
import lombok.RequiredArgsConstructor;
import org.apache.commons.io.IOUtils;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RestController;import java.io.IOException;
import java.nio.charset.StandardCharsets;@RestController
@RequiredArgsConstructor
public class DemoController {private final HttpServletRequest request;@PostMapping("/test")public String demo() throws IOException {ServletInputStream inputStream = request.getInputStream();String jsonString = IOUtils.toString(inputStream, StandardCharsets.UTF_8);System.out.println(jsonString);UserLogin userLogin = JSONObject.parseObject(jsonString, UserLogin.class);System.out.println(userLogin);return "test success！";}
}