「小程序JAVA實戰」小程序開發註冊用戶的接口（33）

轉自：https://idig8.com/2018/08/30/xiaochengxujavashizhanxiaochengxukaifazhuceyonghudejiekou33/

從用戶註冊接口開始。源碼：https://github.com/limingios/wxProgram.git 中的wx-springboot

工具類

• 返回統一工具類JSONResult 放入common工程中

 

package com.idig8.utils;

/**
 * @Description: 自定義響應數據結構
 *              這個類是提供給門戶，ios，安卓，微信商城用的
 *              門戶接受此類數據後須要使用本類的方法轉換成對於的數據類型格式（類，或者list）
 *              其餘自行處理
 *              200：表示成功
 *              500：表示錯誤，錯誤信息在msg字段中
 *              501：bean驗證錯誤，無論多少個錯誤都以map形式返回
 *              502：攔截器攔截到用戶token出錯
 *              555：異常拋出信息
 */
public class JSONResult {

    // 響應業務狀態
    private Integer status;

    // 響應消息
    private String msg;

    // 響應中的數據
    private Object data;

    private String ok;  // 不使用

    public static JSONResult build(Integer status, String msg, Object data) {
        return new JSONResult(status, msg, data);
    }

    public static JSONResult ok(Object data) {
        return new JSONResult(data);
    }

    public static JSONResult ok() {
        return new JSONResult(null);
    }

    public static JSONResult errorMsg(String msg) {
        return new JSONResult(500, msg, null);
    }

    public static JSONResult errorMap(Object data) {
        return new JSONResult(501, "error", data);
    }

    public static JSONResult errorTokenMsg(String msg) {
        return new JSONResult(502, msg, null);
    }

    public static JSONResult errorException(String msg) {
        return new JSONResult(555, msg, null);
    }

    public JSONResult() {

    }

    public JSONResult(Integer status, String msg, Object data) {
        this.status = status;
        this.msg = msg;
        this.data = data;
    }

    public JSONResult(Object data) {
        this.status = 200;
        this.msg = "OK";
        this.data = data;
    }

    public Boolean isOK() {
        return this.status == 200;
    }

    public Integer getStatus() {
        return status;
    }

    public void setStatus(Integer status) {
        this.status = status;
    }

    public String getMsg() {
        return msg;
    }

    public void setMsg(String msg) {
        this.msg = msg;
    }

    public Object getData() {
        return data;
    }

    public void setData(Object data) {
        this.data = data;
    }

    public String getOk() {
        return ok;
    }

    public void setOk(String ok) {
        this.ok = ok;
    }

}

````

* 加密類MD5Utils放入common工程中
``` java
package com.idig8.utils;

import java.security.MessageDigest;

import org.apache.commons.codec.binary.Base64;

public class MD5Utils {

    /**
     * @Description: 對字符串進行md5加密
     */
    public static String getMD5Str(String strValue) throws Exception {
        MessageDigest md5 = MessageDigest.getInstance("MD5");
        String newstr = Base64.encodeBase64String(md5.digest(strValue.getBytes()));
        return newstr;
    }

    public static void main(String[] args) {
        try {
            String md5 = getMD5Str("idig8");
            System.out.println(md5);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

• org包下面的放入common工程中，主要裏面有個Sid的自動生成Id的工具
  

service裏面增長service

UserService.java

package com.idig8.service;

import com.idig8.pojo.Users;

public interface UserService {

    /**
     * 判斷用戶名是否存在
     * @param username
     * @return
     */
    public boolean queryUsernameIsExist(String username);

    /**
     * 保存用戶
     * @param user
     * @return
     */
    public void saveUser(Users user);

}

UserServiceImpl.java

package com.idig8.service;

import org.n3r.idworker.Sid;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.transaction.annotation.Propagation;
import org.springframework.transaction.annotation.Transactional;

import com.idig8.mapper.UsersMapper;
import com.idig8.pojo.Users;

public class UserServiceImpl implements UserService {

    @Autowired
    private UsersMapper usersMapper;

    @Autowired
    private Sid sid;

    @Transactional(propagation =Propagation.SUPPORTS)
    @Override
    public boolean queryUsernameIsExist(String username) {
        Users user = new Users();
        user.setUsername(username);
        Users result = usersMapper.selectOne(user);
        return result==null? false:true;
    }

    @Transactional(propagation =Propagation.REQUIRED)
    @Override
    public void saveUser(Users user) {
        String userId =sid.nextShort();
        user.setId(userId);
        usersMapper.insert(user);
    }

}

api裏面增長controller

RegistLoginController

package com.idig8.controller;

import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RestController;

import com.github.pagehelper.util.StringUtil;
import com.idig8.pojo.Users;
import com.idig8.service.UserService;
import com.idig8.utils.JSONResult;
import com.idig8.utils.MD5Utils;

@RestController
public class RegistLoginController {

    @Autowired
    private UserService userService;

    @PostMapping("/regist")
    public JSONResult regist(@RequestBody Users user) {
        //1.判斷用戶名和密碼不能爲空
        if(StringUtils.isBlank(user.getUsername())||StringUtils.isBlank(user.getPassword())) {
            return JSONResult.errorMsg("用戶名或密碼不能爲空");
        }

        //2.判斷用戶名是否存在
        boolean usernameIsExist = userService.queryUsernameIsExist(user.getUsername());
        if(!usernameIsExist) {
            user.setNickname(user.getUsername());
            try {
                user.setPassword(MD5Utils.getMD5Str(user.getPassword()));
            } catch (Exception e) {

                return JSONResult.errorMsg(e.getMessage());
            }
            user.setFollowCounts(0);
            user.setReceiveLikeCounts(0);
            user.setFansCounts(0);
            userService.saveUser(user);
        }else {
            return JSONResult.errorMsg("用戶名或已經存在，請更換在試試！");
        }



        return JSONResult.ok();
    }
}

PS：基本的流程就是先肯定業務邏輯，開發service類，開發controller類，common裏面都是一些工具。下次說說swagger的使用。