开发工具：eclipse，数据库mysql5.7 jdk1.8

技术：springboot+mybatis

/**
*
*
*
*/package com.bjpowernode.music.ss.service.impl;import javax.annotation.Resource;import com.bjpowernode.music.common.AbstractService;
import com.bjpowernode.music.common.IOperations;
import com.bjpowernode.music.ss.domain.User;
import com.bjpowernode.music.ss.mapper.IUserMapper;
import com.bjpowernode.music.ss.service.IUserService;
import org.springframework.stereotype.Service;@Service("userService")
public class UserService extends AbstractService<User, User> implements IUserService {public UserService() {this.setTableName("user");}@Resourceprivate IUserMapper userMapper;@Overrideprotected IOperations<User, User> getMapper() {return userMapper;}@Overridepublic void setTableName(String tableName) {this.tableName = tableName;;}//    public User getUserByName(String user_name) {
//        User user = userMapper.getUserByName(user_name);
//        return user;
//    }public String login(String user_name, String user_password) {return userMapper.login(user_name, user_password);}public String getUserById(String user_name, String user_password) {return userMapper.getUserById(user_name, user_password);}public String registJudge(String user_name) {return userMapper.registJudge(user_name);}// 更改密码public Integer resetPassword(String user_name, String newUser_password) {return userMapper.resetPassword(user_name, newUser_password);}// 判断用户名是否重复@Overridepublic String rearchUserName(String user_name) {return userMapper.rearchUserName(user_name);}
}

package com.bjpowernode.music.ss.controller.base;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import com.bjpowernode.music.common.WebResponse;
import com.bjpowernode.music.ss.domain.MusicLink;
import com.bjpowernode.music.ss.domain.User;
import com.bjpowernode.music.ss.service.impl.MusicLinkService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import com.bjpowernode.music.ss.service.IMusicLinkService;
/**
*
*
*
*/
@Controller
@RequestMapping("/musicLink")
public class MusicLinkController {
@Autowired
protected WebResponse webResponse;
@Resource
protected IMusicLinkService musicLinkService;
@Resource
protected MusicLinkService musicLinkService2;
/**
* //常用注解快速解释：
* @Controller ：用于标记在一个类上，使用它标记的类就是一个SpringMVC Controller 对象。
* 分发处理器将会扫描使用了该注解的类的方法，并检测该方法是否使用了@RequestMapping 注解。@Controller
* 只是定义了一个控制器类，而使用@RequestMapping 注解的方法才是真正处理请求的处理器。
*
* @RequestMapping ：是一个用来处理请求地址映射的注解，可用于类或方法上。
* 用于类上，表示类中的所有响应请求的方法都是以该地址作为父路径；
* 用于方法上，表示在类的父路径下追加方法上注解中的地址将会访问到该方法
*
* @Autowired：@Autowired 注释，它可以对类成员变量、方法及构造函数进行标注，完成自动装配的工作。 通过 @Autowired的使用来消除 set ，get方法。
*
*
* @Resource：@Autowired与@Resource都可以用来装配bean. 都可以写在字段上,或写在setter方法上。
*
*
* @Responsebody 注解表示该方法的返回的结果直接写入 HTTP 响应正文（ResponseBody）中，
* 一般在异步获取数据时使用，通常是在使用 @RequestMapping 后，返回值通常解析为跳转路径，
* 加上 @Responsebody 后返回结果不会被解析为跳转路径，而是直接写入HTTP 响应正文中。
* 作用： 该注解用于将Controller的方法返回的对象，通过适当的HttpMessageConverter转换为指定格式后，写入到Response对象的body数据区。
*
*
*
*
* @RequestParam（value="aa" required=false）
* 1.可以对传入参数指定参数名
*
* // 下面的对传入参数指定为aa，如果前端不传aa参数名，会报错
* @RequestParam(value="aa") String inputStr
*
* 2、可以通过required=false或者true来要求@RequestParam配置的前端参数是否一定要传
*
* 3、如果@requestParam注解的参数是int类型，并且required=false，此时如果不传参数的话，会报错。原因是，required=false时，不传参数的话，
* 会给参数赋值null，这样就会把null赋值给了int，因此会报错。
*
*
*
*/
// 从数据库中获取歌曲数据，在榜单中显示
@RequestMapping(value = "/getMusicLinkList", method = RequestMethod.POST, produces = "application/json;charset=UTF-8")
@ResponseBody
public WebResponse getMusicLinkList(HttpServletRequest request, HttpServletResponse response, HttpSession session,
@RequestParam(defaultValue = "1", required = false) Integer pageNo,
@RequestParam(defaultValue = "30", required = false) Integer pageSize,
@RequestParam(defaultValue = "正常", required = false) String tbStatus,
@RequestParam(required = false) String keyword,
@RequestParam(defaultValue = "ml_id", required = false) String order,
@RequestParam(defaultValue = "desc", required = false) String desc) {
Object data = null;
String statusMsg = "";
int statusCode = 200;
LinkedHashMap<String, String> condition = new LinkedHashMap<String, String>();
/*
* if (tbStatus != null && tbStatus.length() > 0) { condition.put("tb_status='"
* + tbStatus + "'", "and"); }
*/
if (keyword != null && keyword.length() > 0) {
StringBuffer buf = new StringBuffer();
buf.append("(");
buf.append("test_name like '%").append(keyword).append("%'");
buf.append(" or ");
buf.append("info like '%").append(keyword).append("%'");
buf.append(" or ");
buf.append("other like '%").append(keyword).append("%'");
buf.append(")");
condition.put(buf.toString(), "and");
}
String field = null;
if (condition.size() > 0) {
condition.put(condition.entrySet().iterator().next().getKey(), "");
}
int count = this.musicLinkService.getCount(condition, field);
if (order != null && order.length() > 0 & "desc".equals(desc)) {
order = order + " desc";
}
// 从数据库中获取数据，并把对象的结果集存到list列表中
List<MusicLink> list = this.musicLinkService.getList(condition, pageNo, pageSize, order, field);
Map<Object, Object> map = new HashMap<Object, Object>();
map.put("total", count);
// 如果数据库有15条音乐，则list中有15个对象，则size的大小为15
int size = list.size();
if (size > 0) {
List<MusicLink> listFont = new ArrayList<MusicLink>();
MusicLink vo;
MusicLink voFont = new MusicLink();
// 循环将获取到的对象及结构属性克隆到一个新的voFont对象中，并保存到动态数组中
for (int i = 0; i < size; i++) {
vo = list.get(i);
// 通过java反射将类中当前属性字段对应的内容复制到另外一个类中
BeanUtils.copyProperties(vo, voFont);
listFont.add(voFont);
voFont = new MusicLink();
}
map.put("list", listFont);
// data是一个map对象
data = map;
statusMsg = "根据条件获取分页数据成功！！！";
} else {
map.put("list", list);
data = map;
statusCode = 202;
statusMsg = "no record!!!";
return webResponse.getWebResponse(statusCode, statusMsg, data);
}
return webResponse.getWebResponse(statusCode, statusMsg, data);
}
// 歌曲搜索功能
@RequestMapping(value = "/getSongRearch", method = RequestMethod.POST, produces = "application/json;charset=UTF-8")
@ResponseBody
public WebResponse getSongRearch(HttpServletRequest request, HttpServletResponse response, HttpSession session,
@RequestParam(required = false) String songName) {
Object data = null;
String statusMsg = "";
int statusCode = 200;
// 调用Mapper层的songRearch方法，进行数据库的操作
List<MusicLink> list = this.musicLinkService2.songRearch(songName);
int count = list.size();
System.out.println();
System.out.println("搜索到的歌曲数：" + count);
System.out.println("结束");
Map<Object, Object> map = new HashMap<Object, Object>();
map.put("total", count);
int size = list.size();
if (size > 0) {
List<MusicLink> listFont = new ArrayList<MusicLink>();
MusicLink vo;
MusicLink voFont = new MusicLink();
for (int i = 0; i < size; i++) {
vo = list.get(i);
BeanUtils.copyProperties(vo, voFont);
listFont.add(voFont);
voFont = new MusicLink();
}
map.put("list", listFont);
data = map;
//for (int i = 0; i < map.size(); i++) {
//System.out.println(map.get(listFont).toString());
//}
//
statusMsg = "根据条件获取分页数据成功！！！";
} else {
map.put("list", list);
data = map;
statusCode = 202;
statusMsg = "no record!!!";
return webResponse.getWebResponse(statusCode, statusMsg, data);
}
return webResponse.getWebResponse(statusCode, statusMsg, data);
}
// 歌曲收藏
@RequestMapping(value = "/addMusicCollect", method = RequestMethod.POST, produces = "application/json;charset=UTF-8")
@ResponseBody
public WebResponse addMusicCollect(HttpServletRequest request, HttpServletResponse response, HttpSession session,
@RequestParam(required = false) int song_id, @RequestParam(required = false) String user_name,
@RequestParam(required = false) String user_password, @RequestParam(required = false) String songName) {
WebResponse webResponse = new WebResponse();
MusicLink musicLink = new MusicLink();
User user = new User();
System.out.println("歌曲id：" + song_id + " 用户名：" + user_name + " 户用密码：" + user_password);
Object data = null;
String statusMsg = "";
int statusCode = 200;
String user_Id = null;
try {
user_Id = musicLinkService2.getUserId(user_name, user_password);
} catch (Exception e) {
}
int userId = 0;
try {
// 判断字符串是否是数字，并且抛出异常
boolean NotisNum = (user_Id.equals("null"));
// System.out.println(NotisNum);
if (!NotisNum) {
userId = Integer.parseInt(user_Id);
}
} catch (Exception e) {
}
System.out.println("歌曲名：" + songName);
String jSong = this.musicLinkService.judgeSong(songName, userId);
int my_Id = 0;
try {
// 判断字符串是否是数字，并且抛出异常
// boolean NotisNum
// =(user_Id.equals(null)||user_Id.equals("")||user_Id.equals("null"));
boolean NotisNum = (jSong.equals("null"));
if (!NotisNum) {
my_Id = Integer.parseInt(jSong);
}
} catch (Exception e) {
}
if (my_Id > 0) {
statusCode = 201;
statusMsg = "已收藏,请不要重复收藏！";
} else {
this.musicLinkService.insertSongRearch(song_id, userId);
}
System.out.println("收藏歌曲的用户id：" + userId);
return webResponse.getWebResponse(statusCode, statusMsg, data);
}
}

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