SSM_整合篇
一、整合步骤
1.1 数据表的介绍
team表：
player表：
1.2 创建maven项目
1.3 pom.xml引入jar依赖
4.0.0
com.lxy
myssm_test
1.0-SNAPSHOT
war
5.2.13.RELEASE
3.5.6
1.3.3
5.1.10
8.0.23
1.2.3
4.0.1
2.9.6
1.2.17
4.12
11
11
org.springframework
spring-webmvc
${spring.version}
org.springframework
spring-tx
${spring.version}
org.springframework
spring-jdbc
${spring.version}
org.springframework
spring-aspects
${spring.version}
commons-fileupload
commons-fileupload
1.3.1
org.mybatis
mybatis
${mybatis.version}
org.mybatis
mybatis-spring
${mybatis.spring.version}
com.github.pagehelper
pagehelper
${pagehelper.version}
mysql
mysql-connector-java
${mysql.version}
com.alibaba
druid
${druid.version}
javax.servlet
javax.servlet-api
${servlet-api.version}
provided
com.fasterxml.jackson.core
jackson-databind
${jackson.version}
log4j
log4j
${log4j.version}
junit
junit
${junit.version}
test
org.springframework
spring-test
${spring.version}
javax.annotation
javax.annotation-api
1.3.2
src/main/java
**/*.properties
**/*.xml
false
org.apache.maven.plugins
maven-compiler-plugin
1.8
1.8
UTF-8
org.apache.tomcat.maven
tomcat7-maven-plugin
2.2
80
/
UTF-8
org.mybatis.generator
mybatis-generator-maven-plugin
1.3.5
src/main/resources/generatorConfig.xml
true
org.mybatis.generator
mybatis-generator-core
1.3.5
1.4 编写Mybatis的配置文件
Mybatis的配置文件mybatis.xml
日志配置文件文件log4j.properties：
# Global logging configuration info warning error
log4j.rootLogger=DEBUG,stdout
# Console output...
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%5p [%t] - %m%n
1.5 编写Spring的配置文件spring.xml
连接数据库的参数配置文件jdbc.properties
jdbc.driver=com.mysql.cj.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/myssm_kkb?useUnicode=true&characterEncoding=utf-8&useSSL=false&serverTimezone=GMT
jdbc.username=root
jdbc.password=linda198721这里数据库的版本是Mysql8
spring.xml:
reasonable=true
1.6 编写SpringMVC的配置文件springmvc.xml
1.7 导入静态页面
如果您也想要这个项目的话，可以在下发评论，我私信发送给您
1.8 编写web.xml配置文件
/pages/index.html
contextConfigLocation
classpath*:spring.xml
org.springframework.web.context.ContextLoaderListener
dispatcherServlet
org.springframework.web.servlet.DispatcherServlet
contextConfigLocation
classpath*:springmvc.xml
1
dispatcherServlet
/
httpMethodFilter
org.springframework.web.filter.HiddenHttpMethodFilter
httpMethodFilter
/*
characterEncodingFilter
org.springframework.web.filter.CharacterEncodingFilter
encoding
UTF-8
forceRequestEncoding
true
forceResponseEncoding
true
characterEncodingFilter
/*
1.8 测试
启动项目，浏览器访问http://localhost:8088/。看到如图所示页面表示项目整合成功。
二、使用mybatis反向生成实体类、dao和映射文件
2.1 反向生成配置文件generatorConfig.xml
2.2运行插件
注意只能运行一次,运行完毕显示BUILD SUCCESS即为成功。
2.3 测试
package com.lxy.test;
import com.lxy.mapper.TeamMapper;
import com.lxy.pojo.Team;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import javax.annotation.Resource;
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = {"classpath:spring.xml"})
public class TestMapper {
@Resource
private TeamMapper teamMapper;
@Test
public void test01(){
Team team = teamMapper.selectByPrimaryKey(1001);
System.out.println(team);
}
}
三、案例--使用多条件分页查询
3.1 业务逻辑层
编写一个QueryVO类，存储查询条件
package com.lxy.vo;
import org.springframework.format.annotation.DateTimeFormat;
import java.util.Date;
public class QueryVO {
private String teamName;
private String chineseName;
private String coach;
//@DateTimeFormat(pattern = "yyyy-MM-dd")
private Date beginDate;
//@DateTimeFormat(pattern = "yyyy-MM-dd")
private Date endDate;
private Integer area;
@Override
public String toString() {
return "QueryVO{" +
"teamName='" + teamName + '\'' +
", chineseName='" + chineseName + '\'' +
", coach='" + coach + '\'' +
", beginDate=" + beginDate +
", endDate=" + endDate +
", area=" + area +
'}';
}
public String getTeamName() {
return teamName;
}
public void setTeamName(String teamName) {
this.teamName = teamName;
}
public String getChineseName() {
return chineseName;
}
public void setChineseName(String chineseName) {
this.chineseName = chineseName;
}
public String getCoach() {
return coach;
}
public void setCoach(String coach) {
this.coach = coach;
}
public Date getBeginDate() {
return beginDate;
}
public void setBeginDate(Date beginDate) {
this.beginDate = beginDate;
}
public Date getEndDate() {
return endDate;
}
public void setEndDate(Date endDate) {
this.endDate = endDate;
}
public Integer getArea() {
return area;
}
public void setArea(Integer area) {
this.area = area;
}
}
编写service层代码，用来条件分页查询
package com.lxy.service;
import com.github.pagehelper.PageHelper;
import com.github.pagehelper.PageInfo;
import com.lxy.mapper.TeamMapper;
import com.lxy.pojo.Team;
import com.lxy.pojo.TeamExample;
import com.lxy.vo.QueryVO;
import org.springframework.stereotype.Service;
import javax.annotation.Resource;
import java.util.List;
@Service
public class TeamService {
@Resource
private TeamMapper teamMapper;
public PageInfo queryByPage(Integer pageNum, Integer pageSize, QueryVO vo){
TeamExample example = new TeamExample();
//创建条件的容器
TeamExample.Criteria criteria = example.createCriteria();
if (vo!=null){
if (vo.getTeamName()!=null&&!"".equals(vo.getTeamName().trim())){
criteria.andTeamNameLike("%"+vo.getTeamName().trim()+"%");
}
if(vo.getChineseName()!=null && !"".equals(vo.getChineseName().trim()) ){
criteria.andChineseNameLike("%"+vo.getChineseName().trim()+"%");
}
if(vo.getCoach()!=null && !"".equals(vo.getCoach().trim())){
criteria.andCoachLike("%"+vo.getCoach().trim()+"%");
}
if(vo.getBeginDate()!=null){
criteria.andCreateTimeGreaterThanOrEqualTo(vo.getBeginDate());
}
if(vo.getEndDate()!=null){
criteria.andCreateTimeLessThanOrEqualTo(vo.getEndDate());
}
if(vo.getArea()!=null && vo.getArea()!=-1){
criteria.andAreaEqualTo(vo.getArea());
}
}
//分页
PageHelper.startPage(pageNum,pageSize);
List list = teamMapper.selectByExample(example);
return new PageInfo<>(list);
}
}
编写测试类：
package com.lxy.test;
import com.github.pagehelper.PageInfo;
import com.lxy.mapper.TeamMapper;
import com.lxy.pojo.Team;
import com.lxy.service.TeamService;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import javax.annotation.Resource;
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = {"classpath:spring.xml"})
public class TestMapper {
@Resource
private TeamMapper teamMapper;
@Resource
private TeamService teamService;
@Test
public void test02(){
PageInfo teamPageInfo = teamService.queryByPage(1, 5, null);
System.out.println(teamPageInfo);
}
@Test
public void test01(){
Team team = teamMapper.selectByPrimaryKey(1001);
System.out.println(team);
}
}
测试结果：
3.2 控制器层
3.2.1 返回值的初始写法
编写controller代码：
package com.lxy.controller;
import com.github.pagehelper.PageInfo;
import com.lxy.pojo.Team;
import com.lxy.service.TeamService;
import com.lxy.vo.QueryVO;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import javax.annotation.Resource;
@Controller
@RequestMapping("team")
@ResponseBody
public class TeamController {
@Resource
private TeamService teamService;
@RequestMapping("list")
public PageInfo queryByPage(Integer pageNum, Integer pageSize, QueryVO vo){
if (pageNum==null || pageNum<=0){
pageNum=1;
}
if (pageSize==null || pageSize<=0){
pageSize=5;
}
PageInfo teamPageInfo = teamService.queryByPage(pageNum, pageSize, vo);
return teamPageInfo;
}
}
这样返回给前端是返回的json格式的，包括时间，如果我们要返回正常的时间，需要在Team实体类中的时间字段上添加
@JsonFormat(pattern = "yyyy-MM-dd",timezone = "GMT+8")这样显示的时间正常。
启动程序来测试一下：
这样可以看到返回的json数据正常
3.2.2 返回值的高级写法
将返回值封装为ResultVO，既能返回一个pageInfo，还能返回一个对象，一个集合，以及一条消息。
更改controller代码：
package com.lxy.controller;
import com.github.pagehelper.PageInfo;
import com.lxy.pojo.Team;
import com.lxy.service.TeamService;
import com.lxy.vo.QueryVO;
import com.lxy.vo.ResultVO;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import javax.annotation.Resource;
@Controller
@RequestMapping("team")
@ResponseBody
public class TeamController {
@Resource
private TeamService teamService;
@RequestMapping("list")
public ResultVO queryByPage(Integer pageNum, Integer pageSize, QueryVO vo){
if (pageNum==null || pageNum<=0){
pageNum=1;
}
if (pageSize==null || pageSize<=0){
pageSize=5;
}
PageInfo teamPageInfo = teamService.queryByPage(pageNum, pageSize, vo);
return new ResultVO<>(teamPageInfo);
}
}
启动程序测试：
3.2.3 日期类型解决方案
如果此时想访问localhost的主页面来获取数据，很抱歉目前还获取不到。
因为如果通过主页面来获取条件，初始时时间数据为空，那么程序会想把空指转换为日期类型，所以我们必须要在QueryVO中日期属性上加上日期格式化的注解 如下--
//如果实体类中的日期类型需要从页面获取数据,避免NULL转换为Date类型出现问题
//解决方案2:@InitBinder
//解决方案1:实体类的日期类型属性上添加注解
方案一：
日期格式化：
package com.lxy.vo;
import org.springframework.format.annotation.DateTimeFormat;
import java.util.Date;
public class QueryVO {
private String teamName;
private String chineseName;
private String coach;
@DateTimeFormat(pattern = "yyyy-MM-dd")
private Date beginDate;
@DateTimeFormat(pattern = "yyyy-MM-dd")
private Date endDate;
private Integer area;
@Override
public String toString() {
return "QueryVO{" +
"teamName='" + teamName + '\'' +
", chineseName='" + chineseName + '\'' +
", coach='" + coach + '\'' +
", beginDate=" + beginDate +
", endDate=" + endDate +
", area=" + area +
'}';
}
public String getTeamName() {
return teamName;
}
public void setTeamName(String teamName) {
this.teamName = teamName;
}
public String getChineseName() {
return chineseName;
}
public void setChineseName(String chineseName) {
this.chineseName = chineseName;
}
public String getCoach() {
return coach;
}
public void setCoach(String coach) {
this.coach = coach;
}
public Date getBeginDate() {
return beginDate;
}
public void setBeginDate(Date beginDate) {
this.beginDate = beginDate;
}
public Date getEndDate() {
return endDate;
}
public void setEndDate(Date endDate) {
this.endDate = endDate;
}
public Integer getArea() {
return area;
}
public void setArea(Integer area) {
this.area = area;
}
}
这样就可以访问到主页面了:
方案二：
在controller中添加注解方法：
@InitBinder
protected void initDateFormatBinder(WebDataBinder binder){
SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");
binder.registerCustomEditor(Date.class,new CustomDateEditor(dateFormat,true));
}添加这个方法后，实体类中可不添加注解
四、添加操作
teamService添加代码：
package com.lxy.service;
import com.github.pagehelper.PageHelper;
import com.github.pagehelper.PageInfo;
import com.lxy.mapper.TeamMapper;
import com.lxy.pojo.Team;
import com.lxy.pojo.TeamExample;
import com.lxy.vo.QueryVO;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Propagation;
import org.springframework.transaction.annotation.Transactional;
import javax.annotation.Resource;
import java.util.List;
@Service
public class TeamService {
@Resource
private TeamMapper teamMapper;
@Transactional(propagation = Propagation.REQUIRED,readOnly = true)
public PageInfo queryByPage(Integer pageNum, Integer pageSize, QueryVO vo){
TeamExample example = new TeamExample();
//创建条件的容器
TeamExample.Criteria criteria = example.createCriteria();
if (vo!=null){
if (vo.getTeamName()!=null&&!"".equals(vo.getTeamName().trim())){
criteria.andTeamNameLike("%"+vo.getTeamName().trim()+"%");
}
if(vo.getChineseName()!=null && !"".equals(vo.getChineseName().trim()) ){
criteria.andChineseNameLike("%"+vo.getChineseName().trim()+"%");
}
if(vo.getCoach()!=null && !"".equals(vo.getCoach().trim())){
criteria.andCoachLike("%"+vo.getCoach().trim()+"%");
}
if(vo.getBeginDate()!=null){
criteria.andCreateTimeGreaterThanOrEqualTo(vo.getBeginDate());
}
if(vo.getEndDate()!=null){
criteria.andCreateTimeLessThanOrEqualTo(vo.getEndDate());
}
if(vo.getArea()!=null && vo.getArea()!=-1){
criteria.andAreaEqualTo(vo.getArea());
}
}
//分页
PageHelper.startPage(pageNum,pageSize);
List list = teamMapper.selectByExample(example);
return new PageInfo<>(list);
}
//添加操作，再添加一个事务用来回滚
@Transactional(propagation = Propagation.REQUIRED,rollbackFor = {Exception.class})
public int addTeam(Team team){
return teamMapper.insertSelective(team);
}
}
teamController添加代码：
package com.lxy.controller;
import com.github.pagehelper.PageInfo;
import com.lxy.pojo.Team;
import com.lxy.service.TeamService;
import com.lxy.vo.QueryVO;
import com.lxy.vo.ResultVO;
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.ResponseBody;
import javax.annotation.Resource;
@Controller
@RequestMapping("team")
@ResponseBody
public class TeamController {
@Resource
private TeamService teamService;
@RequestMapping(value = "list",method = RequestMethod.GET)
public ResultVO queryByPage(Integer pageNum, Integer pageSize, QueryVO vo){
if(pageNum==null || pageNum<=0){
pageNum=1;
}
if(pageSize==null || pageSize<=0){
pageSize=5;
}
PageInfo teamPageInfo = teamService.queryByPage(pageNum, pageSize, vo);
return new ResultVO<>(teamPageInfo);
}
//添加操作
@RequestMapping(value = "",method = RequestMethod.POST)
public ResultVO addTeam(Team team){
int i = teamService.addTeam(team);
if (i==1){
return new ResultVO<>();
}
return new ResultVO<>(500,"服务器内部异常，请稍后再试！");
}
}
五、更新操作
5.1 更新步骤
第一步：点击更新按钮时，首先应该根据此条数据的id来返回整条数据，让数据达到一种回显的效果
第二步：等所有数据都修改之后，再次点击提交时才是真正的更新
5.1.1 第一步：
teamService添加代码：
/**
* 根据主键查询
* @param teamId
* @return
*/
@Transactional(propagation = Propagation.REQUIRED,readOnly = true)
public Team queryById(Integer teamId){
return teamMapper.selectByPrimaryKey(teamId);
}teamController添加代码：
//根据主键查询
@RequestMapping(value = "{id}",method =RequestMethod.GET)
public ResultVO update(@PathVariable("id") Integer teamId){
Team team = teamService.queryById(teamId);
return new ResultVO<>(team);
} 5.1.2 第二步：
teamService添加代码：
/**
* 更新 根据主键更新
* @param team
* @return
*/
@Transactional(propagation = Propagation.REQUIRED,rollbackFor = {Exception.class})
public int updateTeam(Team team){
return teamMapper.updateByPrimaryKeySelective(team);
}teamController添加代码：
@RequestMapping(value = "{id}",method = RequestMethod.PUT)
public ResultVO updateTeam(@PathVariable("id") Integer teamId,Team team){
team.setTeamId(teamId);
int i = teamService.updateTeam(team);
if(i==1){
return new ResultVO();
}
return new ResultVO<>(500,"服务器内部异常，请稍后再试！");
} 六、删除操作
此删除功能也应该为逻辑删除，即删除时不是数据直接消失，而是数据在显示状态但不能操作。
teamService添加代码：
/**
* 根据主键删除 逻辑删除
* @param teamId
* @return
*/
@Transactional(propagation = Propagation.REQUIRED,rollbackFor = {Exception.class})
public int deleteTeam(Integer teamId){
Team team = teamMapper.selectByPrimaryKey(teamId);
team.setIsDel(1);
return teamMapper.updateByPrimaryKeySelective(team);
}teamController添加代码：
@RequestMapping(value = "{id}",method = RequestMethod.DELETE)
public ResultVO delete(@PathVariable("id") Integer teamId){
int delete = teamService.deleteTeam(teamId);
if (delete==1){
return new ResultVO<>();
}
return new ResultVO<>(500,"服务器内部异常，请稍后再试！");
} 
七、文件上传
teamController添加代码:
@RequestMapping(value = "{id}",method = RequestMethod.POST)
public ResultVO uploadLogo(@RequestParam("logo") MultipartFile myFile, HttpServletRequest request,
@PathVariable("id") Integer teamId){
//文件上传到指定位置
String path = request.getServletContext().getRealPath("/img/uploadFile");
//获取原始文件的名称
String originalFilename = myFile.getOriginalFilename();
//定义文件的新名称:随机名称+原有的后缀名
String randomName= UUID.randomUUID().toString().replace("-","");
int index = originalFilename.lastIndexOf(".");
String hz = originalFilename.substring(index);
String logoName=randomName+hz;
int num=0;
try {
myFile.transferTo(new File(path+"/"+logoName));
System.out.println("上传成功！"+path+"/"+logoName);
Team team = new Team();
team.setTeamId(teamId);
team.setTeamLogo(logoName);
num = teamService.updateTeam(team);
if(num==1){
return new ResultVO();
}else {
return new ResultVO<>(500,"服务器内部异常，请稍后再试！");
}
} catch (IOException e) {
e.printStackTrace();
return new ResultVO<>(500,"图片上传出现问题！"+e.getMessage());
}
} 
至此SSM整合完毕，如果你想要此项目来练习一下，请给我一个三连并在下发评论，我会及时联系你给你发前端素材和后端源码，感谢观看！！！