SpringMVC 中，当前台传入多个参数时，可将参数封装成一个bean类

古城微笑少年丶 2022-06-07 13:44 127阅读 0赞

在实际业务场景中，当前台通过 url 向后台传送多个参数时，可以将参数封装成一个bean类，在bean类中对各个参数进行非空，默认值等的设置。

前台 url ，想后台传送两个参数，userName 和 password：

http://localhost:8082/web/baseAction.do?pathVar=app/task/fetchItemDetail.do?userName=123&password=123

将参数封装成bean 类，并在bean类中对参数进行控制：

import org.hibernate.validator.constraints.NotEmpty;
    
    /**
     * Created by thinkpad on 2017/10/23.
     */
    public class QueryCondition {
    
        @NotEmpty(message = "validator.userName")
        private String userName ;
        private String password;
    
        public String getUserName() {
            return userName;
        }
    
        public void setUserName(String userName) {
            this.userName = userName;
        }
    
        public String getPassword() {
            if (null == password || password.length() == 0){
                password = "123456";
            }
            return password;
        }
    
        public void setPassword(String password) {
            this.password = password;
        }
    }

controller 中的接收、打印及去除当前传入的参数：

@RequestMapping("/fetchItemDetail.do")
        @ResponseBody
        public String fetchItemDetail(QueryCondition condition) {
            JSONObject json = new JSONObject();
            System.out.println(ReflectionToStringBuilder.toString(condition, ToStringStyle.MULTI_LINE_STYLE));
            System.out.println("conditionUserName = [" + condition.getUserName() + "], " +
                    "conditionPassword = [" + condition.getPassword() + "]");
            return json.toJSONString();
        }