「小程序JAVA实战」小程序登录与后端联调(36)
重新温习下用户的注册的方式,开发一个用户登录的spring boot接口。源码:https://github.com/limingios/wxProgram.git 中的wx-springboot 和 No.15
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service 类的开发
UserService.java
package com.idig8.service; import com.idig8.pojo.Users; public interface UserService { /** * 判断用户名是否存在 * @param username * @return */ public boolean queryUsernameIsExist(String username); /** * 保存用户 * @param user * @return */ public void saveUser(Users user); /** * 查询用户对象 * @param username * @return */ public Users queryUserIsExist(Users user); } ··· * UserServiceImpl.java > Sid 是注入的id的生成工具,Example queryExample = new Example(Users.class); 和 Criteria criteria = queryExample.createCriteria(); 都是一种套路,就是查询套路,大家可以看看 https://baike.baidu.com/item/criteria/5354117 ··· java package com.idig8.service; import org.n3r.idworker.Sid; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.boot.autoconfigure.security.SecurityProperties.User; import org.springframework.stereotype.Service; import org.springframework.transaction.annotation.Propagation; import org.springframework.transaction.annotation.Transactional; import com.idig8.mapper.UsersMapper; import com.idig8.pojo.Users; import com.idig8.utils.MD5Utils; import tk.mybatis.mapper.entity.Example; import tk.mybatis.mapper.entity.Example.Criteria; @Service 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); } @Transactional(propagation =Propagation.SUPPORTS) @Override public Users queryUserIsExist(Users user) { Example queryExample = new Example(Users.class); Criteria criteria = queryExample.createCriteria(); criteria.andEqualTo("username",user.getUsername()); try { criteria.andEqualTo("password",MD5Utils.getMD5Str(user.getPassword())); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } Users userOne = usersMapper.selectOneByExample(queryExample); return userOne; } }
controller 类的开发
RegistLoginController.java
增加了登录方法。
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.idig8.pojo.Users;
import com.idig8.service.UserService;
import com.idig8.utils.JSONResult;
import com.idig8.utils.MD5Utils;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
@RestController
@Api(value="用户注册登录的接口",tags={"注册和登录的controller"})
public class RegistLoginController {
@Autowired
private UserService userService;
@ApiOperation(value="用户注册",notes="用户注册的接口")
@PostMapping("/regist")
public JSONResult regist(@RequestBody Users user) {
//1.判断用户名和密码不能为空
if(StringUtils.isBlank(user.getUsername())||StringUtils.isBlank(user.getPassword())) {
return JSONResult.errorMsg("用户名或密码不能为空");
}
//2.判断用户名是否存在
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("用户名或已经存在,请更换在试试!");
}
//防止密码返回被获取到
user.setPassword("");
return JSONResult.ok(user);
}
@ApiOperation(value="用户登录",notes="用户登录的接口")
@PostMapping("/login")
public JSONResult login(@RequestBody Users user) {
//1.判断用户名和密码不能为空
if(StringUtils.isBlank(user.getUsername())||StringUtils.isBlank(user.getPassword())) {
return JSONResult.errorMsg("用户名或密码不能为空");
}
//2.判断用户名是否存在
Users userObject = userService.queryUserIsExist(user);
if(userObject==null){
return JSONResult.errorMsg("用户名或密码不存在!");
}
//防止密码返回被获取到
user.setPassword("");
return JSONResult.ok(userObject);
}
}
wx前端部分的开发
const app = getApp() Page({ data: { }, doLogin: function (e) { var formObject = e.detail.value; var username = formObject.username; var password = formObject.password; // 简单验证 if (username.length == 0 || password.length == 0) { wx.showToast({ title: '用户名或密码不能为空', icon: 'none', duration: 3000 }) } else { wx.request({ url: app.serverUrl + "/login", method: "POST", data: { username: username, password: password }, header: { 'content-type': 'application/json' // 默认值 }, success: function (res) { console.log(res.data); var status = res.data.status; if (status == 200) { wx.showToast({ title: "用户登陆成功~!", icon: 'none', duration: 3000 }) app.userinfo = res.data.data; } else if (status == 500) { wx.showToast({ title: res.data.msg, icon: 'none', duration: 3000 }) } } }) } }, goLoginPage: function (e) { console.log("跳转到注册"); } })
PS:测试成功了,其实登录和注册页面基本一样的,就是改了个标题,请求的request地址发生了改变,唯一区别比较大的是,https://baike.baidu.com/item/criteria/5354117 这是spring boot常用的。
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