Spring练习 —— 黑马

（还存在需要完善的地方，例如新建新的用户，用户id不是从原表中进行提取）

Spring环境搭建步骤 ① 创建工程（Project&Module） ② 导入静态页面 ③ 添加需要的Maven依赖 ④ 创建包结构（controller、service业务层、dao、domain、utils） ⑤ 导入数据库脚本 ⑥ 创建POJO类（User.java和Role.java） ⑦ 创建配置文件（applicationContext.xml、spring-mvc.xml、jdbc.properties、log4j.properties）  注意：web.xml 需要进行配置

  
  
    CharacterEncodingFilter
    org.springframework.web.filter.CharacterEncodingFilter
    
      encoding
      UTF-8
    
  
  
    CharacterEncodingFilter
    /*
  

  
  
    DispatcherServlet
    org.springframework.web.servlet.DispatcherServlet
    
      contextConfigLocation
      classpath:spring-mvc.xml
    
    1
  
  
    DispatcherServlet
    /
  


  
  
    contextConfigLocation
    classpath:applicationContext.xml
  

  
  
    org.springframework.web.context.ContextLoaderListener
  

运行Tomcat (  localhost:8080/Spirng_war/ ）

首先打开index.jsp页面，但因为写有如下代码，所以直接打开main.jsp

<%
   response.sendRedirect(request.getContextPath()+"/pages/main.jsp");//默认打开main.jsp
%>

角色列表的展示

① 点击角色管理菜单发送请求到服务器端（修改角色管理菜单的url地址）

在main.jsp中发现aside.jsp（导航侧栏 ）对其进行修改

  角色管理

domain —— Role

package com.zd.domain;

public class Role {

    private Long id;
    private String roleName;
    private String roleDesc;

    public Long getId() {
        return id;
    }

    public void setId(Long id) {
        this.id = id;
    }

    public String getRoleName() {
        return roleName;
    }

    public void setRoleName(String roleName) {
        this.roleName = roleName;
    }

    public String getRoleDesc() {
        return roleDesc;
    }

    public void setRoleDesc(String roleDesc) {
        this.roleDesc = roleDesc;
    }

    @Override
    public String toString() {
        return "Role{" +
                "id=" + id +
                ", roleName='" + roleName + '\'' +
                ", roleDesc='" + roleDesc + '\'' +
                '}';
    }
}

② 创建RoleController

package com.zd.controller;

import com.zd.domain.Role;
import com.zd.service.RoleService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;

import java.util.List;

@RequestMapping("/role")
@Controller
public class RoleController {

    @Autowired
    private RoleService roleService;



    @RequestMapping("/list")
    public ModelAndView list(){
        ModelAndView modelAndView = new ModelAndView();
        List roleList = roleService.list();
        //设置模型
        modelAndView.addObject("roleList",roleList);
        //设置视图
        modelAndView.setViewName("role-list");//展示列表的地址
        System.out.println(roleList);
        return modelAndView;
    }

}

③ 创建RoleService

package com.zd.service;

import com.zd.domain.Role;

import java.util.List;

public interface RoleService {
        public List list() ;

        void save(Role role);
}

service —— impl —— RoleServiceImpl

package com.zd.service.impl;

import com.zd.dao.RoleDao;
import com.zd.domain.Role;
import com.zd.service.RoleService;

import java.util.List;

public class RoleServiceImpl implements RoleService {
    private RoleDao roleDao;

    public void setRoleDao(RoleDao roleDao) {
        this.roleDao = roleDao;
    }


    @Override
    public List list() {
        List roleList = roleDao.findAll();
        return roleList;
    }

}

④ 创建RoleDao

package com.zd.dao;

import com.zd.domain.Role;

import java.util.List;

public interface RoleDao {
    List findAll();
}

dao —— RoleDao —— RoleDaoImpl（使用JdbcTemplate完成查询 *** 作）

package com.zd.dao.impl;

import com.zd.dao.RoleDao;
import com.zd.domain.Role;
import org.springframework.jdbc.core.BeanPropertyRowMapper;
import org.springframework.jdbc.core.JdbcTemplate;

import java.util.List;

public class RoleDaoImpl implements RoleDao {
    private JdbcTemplate jdbcTemplate;

    public void setJdbcTemplate(JdbcTemplate jdbcTemplate) {
        this.jdbcTemplate = jdbcTemplate;
    }

    public List findAll() {
        List roleList = jdbcTemplate.query("select * from sys_role", new BeanPropertyRowMapper(Role.class));
        return roleList;
    }
}

⑤ ⑥ 将查询数据存储到Model中 ⑦ 转发到role-list.jsp页面进行展示

配置文件 

log4j.properties

### direct log messages to stdout ###
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target=System.out
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d{ABSOLUTE} %5p %c{1}:%L - %m%n

### direct messages to file mylog.log ###
log4j.appender.file=org.apache.log4j.FileAppender
log4j.appender.file.File=c:/mylog.log
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.layout.ConversionPattern=%d{ABSOLUTE} %5p %c{1}:%L - %m%n

### set log levels - for more verbose logging change 'info' to 'debug' ###

log4j.rootLogger=info, stdout

jdbc.properties

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/test
jdbc.username=root
jdbc.password=root

spring-mvc.xml

applicationContext.xml

role_list.jsp

                            
      
         
         ${role.id}
         ${role.roleName}
         ${role.roleDesc}
         
            删除
         
      
   

错误记录

错误原因：代码写错

//源代码
List roleList = jdbcTemplate.query("select * from sys_role", new BeanPropertyRowMapper());

java.lang.IllegalStateException: Mapped class was not specified

//修改后
List roleList = jdbcTemplate.query("select * from sys_role", new BeanPropertyRowMapper(Role.class));

角色添加 ① 点击列表页面新建按钮跳转到角色添加页面 ② 输入角色信息，点击保存按钮，表单数据提交服务器 ③ 编写RoleController的save()方法

 @RequestMapping("/save")
    public String save(Role role){
        roleService.save(role);
        return"redirect:/role/list";
    }

④ 编写RoleService的save()方法

void save(Role role);

RoleServiceImpl的save()方法

 @Override
    public void save(Role role) {
        roleDao.save(role);
    }

⑤ 编写RoleDao的save()方法

void save(Role role);

⑥ 使用JdbcTemplate保存Role数据到sys_role（RoleDaoImpl中的save方法）

@Override
    public void save(Role role) {
        jdbcTemplate.update("insert into sys_role values(?,?,?)",null,role.getRoleName(),role.getRoleDesc());
    }

⑦ 跳转回角色列表页面

role_add.jsp

   
   
 

   
      角色信息
      

         角色名称
         
            
         
         角色描述
         
            
         
      
   
    
   
      保存
      返回
   
    
   

注意：method="post"如果出现中文乱码，则可在web.xml中配置全局过滤的filter

  CharacterEncodingFilter
  org.springframework.web.filter.CharacterEncodingFilter
  
    encoding
    UTF-8
  


  CharacterEncodingFilter
  /*

② 创建RoleController

package com.zd.controller;


import com.zd.domain.Role;
import com.zd.service.RoleService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;

import java.util.List;

@RequestMapping("/role")
@Controller
public class RoleController {

    @Autowired
    private RoleService roleService;

    @RequestMapping("/save")
    public String save(Role role){
        roleService.save(role);
        return "redirect:/role/list";
    }

    @RequestMapping("/list")
    public ModelAndView list(){
        ModelAndView modelAndView = new ModelAndView();
        List roleList = roleService.list();
        //设置模型
        modelAndView.addObject("roleList",roleList);
        //设置视图
        modelAndView.setViewName("role-list");
        System.out.println(roleList);
        return modelAndView;
    }

}

service —— RoleService

package com.zd.service;

import com.zd.domain.Role;

import java.util.List;

public interface RoleService {
        public List list() ;

        void save(Role role);
}

service —— impl —— RoleServiceImpl

package com.zd.service.impl;

import com.zd.dao.RoleDao;
import com.zd.domain.Role;
import com.zd.service.RoleService;

import java.util.List;

public class RoleServiceImpl implements RoleService {
    private RoleDao roleDao;

    public void setRoleDao(RoleDao roleDao) {
        this.roleDao = roleDao;
    }


    @Override
    public List list() {
        List roleList = roleDao.findAll();
        return roleList;
    }

    @Override
    public void save(Role role) {

    }
}

dao —— RoleDao

package com.zd.dao;

import com.zd.domain.Role;

import java.util.List;

public interface RoleDao {
    List findAll();
}

dao —— RoleDao —— RoleDaoImpl

package com.zd.dao.impl;

import com.zd.dao.RoleDao;
import com.zd.domain.Role;
import org.springframework.jdbc.core.BeanPropertyRowMapper;
import org.springframework.jdbc.core.JdbcTemplate;

import java.util.List;

public class RoleDaoImpl implements RoleDao {
    private JdbcTemplate jdbcTemplate;

    public void setJdbcTemplate(JdbcTemplate jdbcTemplate) {
        this.jdbcTemplate = jdbcTemplate;
    }

    public List findAll() {
        List roleList = jdbcTemplate.query("select * from sys_role", new BeanPropertyRowMapper(Role.class));
        return roleList;
    }



}

配置文件 

log4j.properties

### direct log messages to stdout ###
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target=System.out
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d{ABSOLUTE} %5p %c{1}:%L - %m%n

### direct messages to file mylog.log ###
log4j.appender.file=org.apache.log4j.FileAppender
log4j.appender.file.File=c:/mylog.log
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.layout.ConversionPattern=%d{ABSOLUTE} %5p %c{1}:%L - %m%n

### set log levels - for more verbose logging change 'info' to 'debug' ###

log4j.rootLogger=info, stdout

jdbc.properties

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/test
jdbc.username=root
jdbc.password=root

spring-mvc.xml

applicationContext.xml

role_list.jsp

                            
      
         
         ${role.id}
         ${role.roleName}
         ${role.roleDesc}
         
            删除
         
      
   

错误记录

错误原因：代码写错

//源代码
List roleList = jdbcTemplate.query("select * from sys_role", new BeanPropertyRowMapper());

java.lang.IllegalStateException: Mapped class was not specified

//修改后
List roleList = jdbcTemplate.query("select * from sys_role", new BeanPropertyRowMapper(Role.class));

角色添加的步骤 ① 点击列表页面新建按钮跳转到角色添加页面 ② 输入角色信息，点击保存按钮，表单数据提交服务器 ③ 编写RoleController的save()方法

 @RequestMapping("/save")
    public String save(Role role){
        roleService.save(role);
        return"redirect:/role/list";
    }

④ 编写RoleService的save()方法

void save(Role role);

RoleServiceImpl的save()方法

 @Override
    public void save(Role role) {
        roleDao.save(role);
    }

⑤ 编写RoleDao的save()方法

void save(Role role);

⑥ 使用JdbcTemplate保存Role数据到sys_role（RoleDaoImpl中的save方法）

@Override
    public void save(Role role) {
        jdbcTemplate.update("insert into sys_role values(?,?,?)",null,role.getRoleName(),role.getRoleDesc());
    }

⑦ 跳转回角色列表页面

role_add.jsp

   
   
 

   
      角色信息
      

         角色名称
         
            
         
         角色描述
         
            
         
      
   
    
   
      保存
      返回
   
    
   

注意：method="post"如果出现中文乱码，则可在web.xml中配置全局过滤的filter

  CharacterEncodingFilter
  org.springframework.web.filter.CharacterEncodingFilter
  
    encoding
    UTF-8
  


  CharacterEncodingFilter
  /*

 用户列表的展示

① 点击用户管理菜单发送请求到服务器端（修改用户管理菜单的url地址）—— aside.jsp

  用户管理

② 创建UserController

package com.zd.controller;

import com.zd.domain.User;
import com.zd.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;

import java.util.List;

@Controller
@RequestMapping("/user")
public class UserController {
    @Autowired
    private UserService userService;

    @RequestMapping("/list")
    public ModelAndView list(){
        ModelAndView modelAndView = new ModelAndView();
        List userList = userService.list();
        //设置模型
        modelAndView.addObject("userList",userList);
        //设置视图
        modelAndView.setViewName("user-list");
        return modelAndView;
    }
}

③ 创建UserService 的 list()方法

package com.zd.service;

import com.zd.domain.User;
import java.util.List;

public interface UserService {
    public List list();

}

 UserServiceImpl 的 list()方法   将查询数据存储到Model中

package com.zd.service.impl;

import com.zd.dao.RoleDao;
import com.zd.dao.UserDao;
import com.zd.domain.Role;
import com.zd.domain.User;
import com.zd.service.UserService;

import java.util.List;

public class UserServiceImpl implements UserService {

    private UserDao userDao;
    public void setUserDao(UserDao userDao) {
        this.userDao = userDao;
    }

    private RoleDao roleDao;
    public void setRoleDao(RoleDao roleDao) {
        this.roleDao = roleDao;
    }

    public List list() {
        List userList = userDao.findAll();
        //封装userList中的每一个User的roles数据
        for (User user : userList) {
            //获得user的id
            Long id = user.getId();
            //将id作为参数 查询当前userId对应的Role集合数据
            List roles = roleDao.findRoleByUserId(id);
            user.setRoles(roles);
        }
        return userList;
    }
}

④ 创建UserDao

package com.zd.dao;

import com.zd.domain.User;

import java.util.List;

public interface UserDao {
    List findAll();
}

UserDaoImpl  使用JdbcTemplate完成查询 *** 作

package com.zd.dao.impl;

import com.zd.dao.UserDao;
import com.zd.domain.User;
import org.springframework.jdbc.core.BeanPropertyRowMapper;
import org.springframework.jdbc.core.JdbcTemplate;

import java.util.List;

public class UserDaoImpl implements UserDao {

    private JdbcTemplate jdbcTemplate;
    public void setJdbcTemplate(JdbcTemplate jdbcTemplate) {
        this.jdbcTemplate = jdbcTemplate;
    }

    public List findAll() {
        List userList = jdbcTemplate.query("select * from sys_user ", new BeanPropertyRowMapper(User.class));
        return userList;
    }

}

RoleDao 增添 findRoleByUserId() 方法

 List findRoleByUserId(Long id);

RoleDaoImpl

@Override
    public List findRoleByUserId(Long id) {
        List roles = jdbcTemplate.query("select * from sys_user_role ur,sys_role r where ur.roleId=r.id and ur.userId=?", new BeanPropertyRowMapper(Role.class), id);
        return roles;
    }

⑤ 转发到user-list.jsp页面进行展示

   
      
      ${user.id}
      ${user.username}
      ${user.email}
      ${user.phoneNum}
      
         
               ${role.roleName}
         
      
      
         删除
      
   

配置文件：applicationContext.xml

用户添加 ① 点击列表页面新建按钮跳转到角色添加页面 user-list.jsp

    新建

② 输入角色信息，点击保存按钮，表单数据提交服务器 ③UserController的save()方法

@RequestMapping("/save")
    //Long[] roleIds 存储用户角色
    public String save(User user,Long[] roleIds){
        userService.save(user, roleIds);
        return "redirect:/user/list";//跳转回角色列表页面
    }

    @RequestMapping("/saveUI")
    public ModelAndView saveUI(){
        ModelAndView modelAndView = new ModelAndView();
        List roleList = roleService.list();
        //设置模型
        modelAndView.addObject("roleList",roleList);
        //设置视图
        modelAndView.setViewName("user-add");

        return modelAndView;
    }

④ 编写UserService的save()方法

void save(User user, Long[] roleIds);

UserServiceImpl

@Override
    public void save(User user, Long[] roleIds) {
        //第一步 向user表中存储数据
        Long userId = userDao.save(user);
        //第二步  向role表中存储多条数据
        userDao.saveUserRoleRel(userId,roleIds);
    }

⑤ 编写UserDao的save()方法

 Long save(User user);

    void saveUserRoleRel(Long id, Long[] roleIds);

UserDaoImpl  使用JdbcTemplate保存Role数据到sys_role

 @Override
    public Long save(final User user) {
        //创建PreparedStatementCreator
        PreparedStatementCreator creator =new PreparedStatementCreator() {
            @Override
            public PreparedStatement createPreparedStatement(Connection connection) throws SQLException {
                //使用原始jdbc完成有个preparedStatement的组件
                PreparedStatement preparedStatement = connection.prepareStatement("insert into sys_user values(?,?,?,?,?)",PreparedStatement.RETURN_GENERATED_KEYS);
                preparedStatement.setObject(1,null);
                preparedStatement.setString(2,user.getUsername());
                preparedStatement.setString(3,user.getEmail());
                preparedStatement.setString(4,user.getPassword());
                preparedStatement.setString(5,user.getPhoneNum());
                return preparedStatement;
            }
        };
        //创建keyHolder
        GeneratedKeyHolder keyHolder = new GeneratedKeyHolder();

        jdbcTemplate.update(creator,keyHolder);

        //获得生成的主键
        long userId = keyHolder.getKey().longValue();

        //jdbcTemplate.update("insert into sys_user values(?,?,?,?)",null,user.getUsername(),user.getEmail(),user.getPassword(),user.getPhoneNum());
        return userId;//返回当前保存用户的id,该id是数据库自动生成的
    }

    @Override
    public void saveUserRoleRel(Long userId, Long[] roleIds) {
        for(Long roleId:roleIds)
            jdbcTemplate.update("insert into sys_user_role values(?,?)",userId,roleId);

    }

user-add.jsp

用户角色

    
        ${role.roleName}
    

 删除用户

① 点击用户列表的删除按钮，发送请求到服务器端 user-list.jsp

											删除
										

错误记录： 以上源代码

② UserController的del()方法

@RequestMapping("/del/{userId}")
    public String del(@PathVariable("userId") Long userId){
        userService.del(userId);
        return "redirect:/user/list";//跳回当前用户列表页面
    }

③ UserService的del()方法

void del(Long userId);

UserServiceImpl

 @Override
    public void del(Long userId) {
        //1、删除role关系表中的数据
        userDao.delUerRoleRel(userId);
        //2、删除user中的数据
        userDao.del(userId);
    }

④ UserDao

void delUerRoleRel(Long userId);

void del(Long userId);

UserDaoImpl

@Override
    public void delUerRoleRel(Long userId) {
        jdbcTemplate.update("delete from sys_user_role where userId=?",userId);
    }

@Override
    public void del(Long userId) {
        jdbcTemplate.update("delete from sys_user where id=?",userId);
    }

⑤ UserDao

void delUerRoleRel(Long userId);

 void del(Long userId);