ssm框架搭建+easyui增删改查实现

末蓝、 2021-09-23 04:46 353阅读 0赞

源码下载页面（一个完整的项目）：http://download.csdn.net/detail/jinwufeiyang/9648208

数据库文件下载：http://download.csdn.net/detail/jinwufeiyang/9700588

spring版本：4.0.6

mybatis版本：3.2.5

1、项目目录结构

![798032-20151001220437605-98969800.jpg][]

其中，controller包下存放控制层文件，dao下存放各个model类相关的数据库操作接口，entity下放置各种model类，mappers下放置各个dao对应的映射文件，service服务层就不说了，放置各种service接口，impl是其具体实现类。

2、web.xml文件配置

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<?xml version="1.0" encoding="UTF-8"?>
    <web-app version="3.0" 
        xmlns="http://java.sun.com/xml/ns/javaee" 
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
        xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
        http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">
      <display-name></display-name>    
      <welcome-file-list>
        <welcome-file>login.jsp</welcome-file>
      </welcome-file-list>
      
      
      <context-param>
          <param-name>contextConfigLocation</param-name>
          <param-value>classpath:applicationContext.xml</param-value>
      </context-param>
      
      
      <filter>
          <filter-name>encodingFilter</filter-name>
          <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
          <async-supported>true</async-supported>
          <init-param>
              <param-name>encoding</param-name>
              <param-value>UTF-8</param-value>
          </init-param>
      </filter>
      <filter-mapping>
          <filter-name>encodingFilter</filter-name>
          <url-pattern>/*</url-pattern>
      </filter-mapping>
      
      
      <listener>
          <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
      </listener>
      
      
      <servlet>
          <servlet-name>SpringMVC</servlet-name>
          <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
          <init-param>
              <param-name>contextConfigLocation</param-name>
              <param-value>classpath:spring-mvc.xml</param-value>
          </init-param>
      </servlet>
      <servlet-mapping>
          <servlet-name>SpringMVC</servlet-name>
          <url-pattern>*.do</url-pattern>
      </servlet-mapping>
      
    </web-app>

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3、log4j.properties配置日志

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log4j.rootLogger=DEBUG, Console  
      
    #Console  
    log4j.appender.Console=org.apache.log4j.ConsoleAppender  
    log4j.appender.Console.layout=org.apache.log4j.PatternLayout  
    log4j.appender.Console.layout.ConversionPattern=%d [%t] %-5p [%c] - %m%n  
      
    log4j.logger.java.sql.ResultSet=INFO  
    log4j.logger.org.apache=INFO  
    log4j.logger.java.sql.Connection=DEBUG  
    log4j.logger.java.sql.Statement=DEBUG  
    log4j.logger.java.sql.PreparedStatement=DEBUG

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4、mybatis-config.xml配置

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<?xml version="1.0" encoding="UTF-8" ?>
    <!DOCTYPE configuration
    PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
    "http://mybatis.org/dtd/mybatis-3-config.dtd">
    <configuration>
    
        
        <typeAliases>
            <package name="com.java.entity" />    
        </typeAliases>
    
    </configuration>

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5、spring-mvc.xml配置

![复制代码][copycode.gif]

6、applicationContext.xml配置

![复制代码][copycode.gif]

<?xml version="1.0" encoding="UTF-8"?>    
    <beans xmlns="http://www.springframework.org/schema/beans"    
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"   
        xmlns:p="http://www.springframework.org/schema/p"  
        xmlns:aop="http://www.springframework.org/schema/aop"   
        xmlns:context="http://www.springframework.org/schema/context"  
        xmlns:jee="http://www.springframework.org/schema/jee"  
        xmlns:tx="http://www.springframework.org/schema/tx"  
        xsi:schemaLocation="    
            http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd  
            http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd  
            http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd  
            http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-4.0.xsd  
            http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd">    
            
        
        <context:component-scan base-package="com.java.service"></context:component-scan>
        
        <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
            
            <property name="driverClassName" value="com.mysql.jdbc.Driver"/>
            <property name="url" value="jdbc:mysql://localhost:3306/crm"/>
            <property name="username" value="root"/>
            <property name="password" value="root"/>
        </bean>
        
        
        <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
            <property name="dataSource" ref="dataSource"></property>
            <property name="configLocation" value="classpath:mybatis-config.xml"></property>        
            <property name="mapperLocations" value="classpath:com/java/mappers/*.xml"></property>
        </bean>
        
        
        <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
            <property name="basePackage" value="com.java.dao"></property>
            <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property>
        </bean>
        
        
        <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
            <property name="dataSource" ref="dataSource"></property>
        </bean>
        
        
        <tx:advice id="txAdvice" transaction-manager="transactionManager">
            
            <tx:attributes>
                <tx:method name="insert" propagation="REQUIRED"/>
                <tx:method name="update*" propagation="REQUIRED" />  
                <tx:method name="edit*" propagation="REQUIRED" />  
                <tx:method name="save*" propagation="REQUIRED" />  
                <tx:method name="add*" propagation="REQUIRED" />  
                <tx:method name="new*" propagation="REQUIRED" />  
                <tx:method name="set*" propagation="REQUIRED" />  
                <tx:method name="remove*" propagation="REQUIRED" />  
                <tx:method name="delete*" propagation="REQUIRED" />  
                <tx:method name="change*" propagation="REQUIRED" />  
                <tx:method name="check*" propagation="REQUIRED" />  
                <tx:method name="get*" propagation="REQUIRED" read-only="true" />  
                <tx:method name="find*" propagation="REQUIRED" read-only="true" />  
                <tx:method name="load*" propagation="REQUIRED" read-only="true" />  
                <tx:method name="*" propagation="REQUIRED" read-only="true" />  
            </tx:attributes>
        </tx:advice>
        
        
        <aop:config>
            <aop:pointcut expression="execution(* com.java.service.*.*(..))" id="serviceOperation"/>
            <aop:advisor advice-ref="txAdvice" pointcut-ref="serviceOperation"/>
        </aop:config>
        
    </beans>

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7、增删改查具体实现

主界面很简单：

![798032-20151001221903980-337421481.jpg][]

详细html实现：

![复制代码][copycode.gif]

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
    <%
        String path = request.getContextPath();
        String basePath = request.getScheme() + "://"
                + request.getServerName() + ":" + request.getServerPort()
                + path + "/";
    %>
    
    <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
    <html>
    <head>
    <base href="<%=basePath%>">
    
    <title>My JSP 'userManage.jsp' starting page</title>
    <link rel="stylesheet" type="text/css"
        href="${pageContext.request.contextPath}/jquery-easyui-1.3.3/themes/default/easyui.css">
    <link rel="stylesheet" type="text/css"
        href="${pageContext.request.contextPath}/jquery-easyui-1.3.3/themes/icon.css">
    <script type="text/javascript"
        src="${pageContext.request.contextPath}/jquery-easyui-1.3.3/jquery.min.js"></script>
    <script type="text/javascript"
        src="${pageContext.request.contextPath}/jquery-easyui-1.3.3/jquery.easyui.min.js"></script>
    <script type="text/javascript"
        src="${pageContext.request.contextPath}/jquery-easyui-1.3.3/locale/easyui-lang-zh_CN.js"></script>
    
    <script type="text/javascript">
        var url;
        function searchUser() {
            $("#dg").datagrid('load', {
                "userName" : $("#s_userName").val()
            });
        }
        function openUserAddDialog() {
            $("#dlg").dialog("open").dialog("setTitle", "添加用户信息");
            url = "${pageContext.request.contextPath}/user/save.do";
        }
    
        function openUserModifyDialog() {
            var selectedRows = $("#dg").datagrid("getSelections");
            if (selectedRows.length != 1) {
                $.messager.alert("系统提示", "请选择一条要编辑的数据！");
                return;
            }
            var row = selectedRows[0];
            $("#dlg").dialog("open").dialog("setTitle", "编辑用户信息");
            $("#fm").form("load", row);
            url = "${pageContext.request.contextPath}/user/save.do?id=" + row.id;
        }
        
        function saveUser() {
            $("#fm").form("submit", {
                url : url,
                onSubmit : function() {
                    if ($("#roleName").combobox("getValue") == "") {
                        $.messager.alert("系统提示", "请选择用户角色！");
                        return false;
                    }
                    return $(this).form("validate");
                },
                success : function(result) {
                    var result = eval('(' + result + ')');
                    if (result.success) {
                        $.messager.alert("系统提示", "保存成功！");
                        resetValue();
                        $("#dlg").dialog("close");
                        $("#dg").datagrid("reload");
                    } else {
                        $.messager.alert("系统提示", "保存失败！");
                        return;
                    }
                }
            });
        }
    
        function resetValue() {
            $("#userName").val("");
            $("#password").val("");
            $("#trueName").val("");
            $("#email").val("");
            $("#phone").val("");
            $("#roleName").combobox("setValue", "");
        }
    
        function closeUserDialog() {
            $("#dlg").dialog("close");
            resetValue();
        }
    
        function deleteUser() {
            var selectedRows = $("#dg").datagrid("getSelections");
            if (selectedRows.length == 0) {
                $.messager.alert("系统提示", "请选择要删除的数据！");
                return;
            }
            var strIds = [];
            for ( var i = 0; i < selectedRows.length; i++) {
                strIds.push(selectedRows[i].id);
            }
            var ids = strIds.join(",");
            $.messager.confirm("系统提示", "您确定要删除这<font color=red>"
                    + selectedRows.length + "</font>条数据吗？", function(r) {
                if (r) {
                    $.post("${pageContext.request.contextPath}/user/delete.do", {
                        ids : ids
                    }, function(result) {
                        if (result.success) {
                            $.messager.alert("系统提示", "数据已成功删除！");
                            $("#dg").datagrid("reload");
                        } else {
                            $.messager.alert("系统提示", "数据删除失败，请联系系统管理员！");
                        }
                    }, "json");
                }
            });
        }
    </script>
    </head>
    
    <body style="margin: 1px">
    
        <table id="dg" title="用户管理" class="easyui-datagrid" fitColumns="true"
            pagination="true" rownumbers="true"
            url="${pageContext.request.contextPath}/user/list.do" fit="true"
            toolbar="#tb">
            <thead>
                <tr>
                    <th field="cb" checkbox="true" align="center"></th>
                    <th field="id" width="50" align="center">编号</th>
                    <th field="userName" width="50" align="center">用户名</th>
                    <th field="password" width="50" align="center">密码</th>
                    <th field="trueName" width="50" align="center">真实姓名</th>
                    <th field="email" width="50" align="center">邮件</th>
                    <th field="phone" width="50" align="center">联系电话</th>
                    <th field="roleName" width="50" align="center">角色</th>
                </tr>
            </thead>
        </table>
        <div id="tb">
            <a href="javascript:openUserAddDialog()" class="easyui-linkbutton"
                iconCls="icon-add" plain="true">添加</a> <a
                href="javascript:openUserModifyDialog()" class="easyui-linkbutton"
                iconCls="icon-edit" plain="true">修改</a> <a
                href="javascript:deleteUser()" class="easyui-linkbutton"
                iconCls="icon-remove" plain="true">删除</a>
            <div>
                 用户名： <input type="text" id="s_userName" size="20"
                    onkeydown="if(event.keyCode == 13)searchUser()" /> <a
                    href="javascript:searchUser()" class="easyui-linkbutton"
                    iconCls="icon-search" plain="true">查询</a>
            </div>
    
            <div id="dlg-buttons">
                <a href="javascript:saveUser()" class="easyui-linkbutton"
                    iconCls="icon-ok">保存</a> <a href="javascript:closeUserDialog()"
                    class="easyui-linkbutton" iconCls="icon-cancel">关闭</a>
            </div>
    
            <div id="dlg" class="easyui-dialog"
                style="width: 730px;height:280px;padding:10px 10px;" closed="true"
                buttons="#dlg-buttons">
                <form method="post" id="fm">
                    <table cellspacing="8px;">
                        <tr>
                            <td>用户名：</td>
                            <td><input type="text" id="userName" name="userName"
                                class="easyui-validatebox" required="true" /> <span
                                style="color: red">*</span>
                            </td>
                            <td>    </td>
                            <td>密码：</td>
                            <td><input type="password" id="password" name="password"
                                class="easyui-validatebox" required="true" /> <span
                                style="color: red">*</span>
                            </td>
                        </tr>
                        <tr>
                            <td>真实姓名：</td>
                            <td><input type="text" id="trueName" name="trueName"
                                class="easyui-validatebox" required="true" /> <span
                                style="color: red">*</span>
                            </td>
                            <td>    </td>
                            <td>邮箱：</td>
                            <td><input type="text" id="email" name="email"
                                validType="email" class="easyui-validatebox" required="true" /> <span
                                style="color: red">*</span>
                            </td>
                        </tr>
                        <tr>
                            <td>联系电话：</td>
                            <td><input type="text" id="phone" name="phone"
                                class="easyui-validatebox" required="true" /> <span
                                style="color: red">*</span>
                            </td>
                            <td>    </td>
                            <td>用户角色：</td>
                            <td><select name="roleName" class="easyui-combobox"
                                id="roleName" style="width: 154px;" editable="false"
                                panelHeight="auto">
                                    <option value="">请选择角色</option>
                                    <option value="系统管理员">系统管理员</option>
                                    <option value="销售主管">销售主管</option>
                                    <option value="客户经理">客户经理</option>
                                    <option value="高管">高管</option>
                            </select>  <span style="color: red">*</span>
                            </td>
                        </tr>
                    </table>
                </form>
            </div>
    </body>
    </html>

![复制代码][copycode.gif]

再来看看目录结构：

![798032-20151001222411496-2108175128.jpg][]

UserController：

![复制代码][copycode.gif]

package com.java.controller;
    
    import java.util.HashMap;
    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 net.sf.json.JSONArray;
    import net.sf.json.JSONObject;
    
    import org.springframework.stereotype.Controller;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RequestParam;
    
    import com.java.entity.PageBean;
    import com.java.entity.User;
    import com.java.service.UserService;
    import com.java.util.ResponseUtil;
    import com.java.util.StringUtil;
    import com.sun.mail.iap.Response;
    
    /**
     * 用户Controller层
     * @author Administrator
     *
     */
    @Controller
    @RequestMapping("/user")
    public class UserController {
        
        @Resource
        private UserService userService;
        
        /**
         * 删除用户
         * @param ids
         * @param res
         * @return
         * @throws Exception
         */
        @RequestMapping("/delete")
        public String delete(@RequestParam(value="ids") String ids,HttpServletResponse res) throws Exception{
            String[] idStr = ids.split(",");
            JSONObject jsonObject = new JSONObject();
            for (String id : idStr) {
                userService.delete(Integer.parseInt(id));
            }
            jsonObject.put("success", true);
            ResponseUtil.write(res, jsonObject);
            return null;
        }
        
        /**
         * 添加或者修改
         * @param user
         * @param res
         * @return
         * @throws Exception
         */
        @RequestMapping("/save")
        public String save(User user,HttpServletResponse res) throws Exception{
            //操作记录条数，初始化为0
            int resultTotal = 0;
            if (user.getId() == null) {
                resultTotal = userService.add(user);
            }else{
                resultTotal = userService.update(user);
            }
            JSONObject jsonObject = new JSONObject();
            if(resultTotal > 0){   //说明修改或添加成功
                jsonObject.put("success", true);
            }else{
                jsonObject.put("success", false);
            }
            ResponseUtil.write(res, jsonObject);
            return null;
        }
        
        /**
         * 用户登录
         * @param user
         * @param request
         * @return
         * @throws Exception
         */
        @RequestMapping("/login")
        public String login(User user, HttpServletRequest request) throws Exception{
            User resultUser = userService.login(user);
            if (resultUser == null) {
                request.setAttribute("user", resultUser);
                request.setAttribute("errorMsg", "用户名或密码错误");
                return "login";
            }else {
                HttpSession session = request.getSession();
                session.setAttribute("currentUser", resultUser);
                return "redirect:/main.jsp";
            }
        }
        
        /**
         * 用户分页查询
         * @param page
         * @param rows
         * @param s_user
         * @param res
         * @return
         * @throws Exception
         */
        @RequestMapping("/list")
        public String list(@RequestParam(value="page",required=false) String page,@RequestParam(value="rows",required=false) String rows,User s_user,HttpServletResponse res) throws Exception{
            PageBean pageBean=new PageBean(Integer.parseInt(page),Integer.parseInt(rows));
            Map<String,Object> map=new HashMap<String,Object>();
            map.put("userName", StringUtil.formatLike(s_user.getUserName()));
            map.put("start", pageBean.getStart());
            map.put("size", pageBean.getPageSize());
            List<User> userList=userService.find(map);
            Long total=userService.getTotal(map);
            JSONObject result=new JSONObject();
            JSONArray jsonArray=JSONArray.fromObject(userList);
            result.put("rows", jsonArray);
            result.put("total", total);
            ResponseUtil.write(res, result);
            return null;
        }
        
    }

![复制代码][copycode.gif]

UserDao：

![复制代码][copycode.gif]

package com.java.dao;
    
    import java.util.List;
    import java.util.Map;
    
    import com.java.entity.User;
    
    /**
     * 用户DAO接口
     * 
     * @author Administrator
     * 
     */
    public interface UserDao {
        
        /**
         * 用户登录
         * @param user
         * @return
         */
        public User login(User user);
        
        /**
         * 用户查询
         * @param map
         * @return用户集合
         */
        public List<User> find(Map<String, Object> map);
        
        /**
         * 获取总记录数
         * @param map
         * @return获取的total数
         */
        public Long getTotal(Map<String, Object> map);
        
        /**
         * 修改用户
         * @param user
         * @return影响的记录数
         */
        public int update(User user);
        
        /**
         * 添加用户
         * @param user
         * @return影响的记录数
         */
        public int add(User user);
        
        /**
         * 删除用户
         * @param id
         * @return
         */
        public int delete(Integer id);
        
        
    }

![复制代码][copycode.gif]

PageBean，用来分页的一个工具类：

![复制代码][copycode.gif]

package com.java.entity;
    
    /**
     * 分页Model类
     * @author 
     *
     */
    public class PageBean {
    
        private int page; // 第几页
        private int pageSize; // 每页记录数
        private int start;  // 起始页
        
        public PageBean(int page, int pageSize) {
            super();
            this.page = page;
            this.pageSize = pageSize;
        }
        
        public int getPage() {
            return page;
        }
        public void setPage(int page) {
            this.page = page;
        }
        
        public int getPageSize() {
            return pageSize;
        }
    
        public void setPageSize(int pageSize) {
            this.pageSize = pageSize;
        }
    
        public int getStart() {
            return (page-1)*pageSize;
        }
        
        
    }

![复制代码][copycode.gif]

User，用户实体类：

![复制代码][copycode.gif]

package com.java.entity;
    
    /**
     * 用户实体
     * @author Administrator
     *
     */
    public class User {
        private Integer id;
        private String userName;
        private String password;
        private String trueName;
        private String email;
        private String phone;
        private String roleName;    //角色名称：系统管理员、销售主管、客户经理、高管
        public Integer getId() {
            return id;
        }
        public void setId(Integer id) {
            this.id = id;
        }
        public String getUserName() {
            return userName;
        }
        public void setUserName(String userName) {
            this.userName = userName;
        }
        public String getPassword() {
            return password;
        }
        public void setPassword(String password) {
            this.password = password;
        }
        public String getTrueName() {
            return trueName;
        }
        public void setTrueName(String trueName) {
            this.trueName = trueName;
        }
        public String getEmail() {
            return email;
        }
        public void setEmail(String email) {
            this.email = email;
        }
        public String getPhone() {
            return phone;
        }
        public void setPhone(String phone) {
            this.phone = phone;
        }
        public String getRoleName() {
            return roleName;
        }
        public void setRoleName(String roleName) {
            this.roleName = roleName;
        }
        
    }

![复制代码][copycode.gif]

UserService：

![复制代码][copycode.gif]

package com.java.service;
    
    import java.util.List;
    import java.util.Map;
    
    import com.java.entity.User;
    
    /**
     * UserService接口
     * @author Administrator
     *
     */
    public interface UserService {
        
        /**
         * 用户登录
         * @param user
         * @return
         */
        public User login(User user);
        /**
         * 用户查询
         * @param map
         * @return
         */
        public List<User> find(Map<String, Object> map);
        
        /**
         * 获取总记录数
         * @param map
         * @return
         */
        public Long getTotal(Map<String, Object> map);
        
        /**
         * 修改用户
         * @param user
         * @return影响的记录数
         */
        public int update(User user);
        
        /**
         * 添加用户
         * @param user
         * @return影响的记录数
         */
        public int add(User user);
        
        /**
         * 删除用户
         * @param id
         * @return
         */
        public int delete(Integer id);
    }

![复制代码][copycode.gif]

UserServiceImpl：

![复制代码][copycode.gif]

package com.java.service.impl;
    
    import java.util.List;
    import java.util.Map;
    
    import javax.annotation.Resource;
    
    import org.springframework.stereotype.Service;
    
    import com.java.dao.UserDao;
    import com.java.entity.User;
    import com.java.service.UserService;
    
    /**
     * UserService实现类
     * @author Administrator
     *
     */
    @Service("userService")
    public class UserServiceImpl implements UserService{
        
        @Resource
        private UserDao userDao;
        
        @Override
        public User login(User user) {
            return userDao.login(user);
        }
        
        @Override
        public List<User> find(Map<String, Object> map) {
            return userDao.find(map);
        }
        
        @Override
        public Long getTotal(Map<String, Object> map) {
            return userDao.getTotal(map);
        }
    
        @Override
        public int update(User user) {
            return userDao.update(user);
        }
    
        @Override
        public int add(User user) {
            return userDao.add(user);
        }
    
        @Override
        public int delete(Integer id) {
            return userDao.delete(id);
        }
    }

![复制代码][copycode.gif]

ResponseUtil工具类，主要用于返回json数据：

![复制代码][copycode.gif]

package com.java.util;
    
    import java.io.PrintWriter;
    
    import javax.servlet.http.HttpServletResponse;
    
    
    public class ResponseUtil {
    
        public static void write(HttpServletResponse response,Object object)throws Exception{
            response.setContentType("text/html;charset=utf-8");
            PrintWriter out=response.getWriter();
            out.println(object);
            out.flush();
            out.close();
        }
    }

![复制代码][copycode.gif]

StringUtil，字符串工具类：

![复制代码][copycode.gif]

package com.java.util;
    
    /**
     * 字符串工具类
     * @author 
     *
     */
    public class StringUtil {
    
        /**
         * 判断是否是空
         * @param str
         * @return
         */
        public static boolean isEmpty(String str){
            if(str==null||"".equals(str.trim())){
                return true;
            }else{
                return false;
            }
        }
        
        /**
         * 判断是否不是空
         * @param str
         * @return
         */
        public static boolean isNotEmpty(String str){
            if((str!=null)&&!"".equals(str.trim())){
                return true;
            }else{
                return false;
            }
        }
        
        /**
         * 格式化模糊查询
         * @param str
         * @return
         */
        public static String formatLike(String str){
            if(isNotEmpty(str)){
                return "%"+str+"%";
            }else{
                return null;
            }
        }
    }

![复制代码][copycode.gif]

UserMapper.xml，mybatis所谓的动态sql语句，全部封装在这里：

![复制代码][copycode.gif]

<?xml version="1.0" encoding="UTF-8" ?>
    <!DOCTYPE mapper
    PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
    "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
    <mapper namespace="com.java.dao.UserDao">
        
        
            
        <resultMap type="User" id="UserResult">
            <result property="id" column="id" />
            <result property="userName" column="userName" />
            <result property="password" column="password" />
            <result property="trueName" column="trueName" />
            <result property="email" column="email" />
            <result property="phone" column="phone" />
            <result property="roleName" column="roleName" />
        </resultMap>
        
        
        <select id="login" parameterType="User" resultMap="UserResult">
            select * from userInfo where userName = #{userName} and password = #{password} and roleName = #{roleName}
        </select>
        
        
        <select id="find" parameterType="Map" resultMap="UserResult">
            select * from userInfo
            <where>
                <if test="userName!=null and userName!='' ">
                    and userName like #{userName}
                </if>
            </where>
            <if test="start!=null and size!=null">
                limit #{start},#{size}
            </if>
        </select>
        <select id="getTotal" parameterType="Map" resultType="Long">
            select count(*) from userInfo
            <where>
                <if test="userName!=null and userName!='' ">
                    and userName like #{userName}
                </if>
            </where>
        </select>
        
        
        <insert id="add" parameterType="User">
            insert into userInfo values(null,#{userName},#{password},#{trueName},#{email},#{phone},#{roleName})
        </insert>
        
        
        <update id="update" parameterType="User">
            update userInfo
            <set>
                <if test="userName != null and userName != ''">userName = #{userName},</if>
                <if test="password != null and password != ''">password = #{password},</if>
                <if test="trueName != null and trueName != ''">trueName = #{trueName},</if>
                <if test="email != null and email != ''">email = #{email},</if>
                <if test="phone != null and phone != ''">phone = #{phone},</if>
                <if test="roleName != null and roleName != ''">roleName = #{roleName},</if>
            </set>
            where id = #{id}
        </update>
        
        
        <delete id="delete" parameterType="Integer">
            delete from userInfo where id = #{id}
        </delete>
    </mapper>

![复制代码][copycode.gif]

最后是数据表结构：

![798032-20151001223133246-1825830145.jpg][]

![798032-20151001223325933-2132941334.jpg][]

![798032-20151001223343418-1587827304.jpg][]

![798032-20151001223352308-1997317053.jpg][]

相比hibernate，mybatis轻量级很多，但是新手最容易也最难搞定的往往是环境搭建部分，一不留神就是各种jar包冲突，真叫人抓狂啊啊，以后还得留意呵。

[798032-20151001220437605-98969800.jpg]: /images/20210923/8c9d13fcd3a94b3d9a62961081726927.png
[copycode.gif]: /images/20210923/2fa43ac3e05e4ed78d3e43819218b661.png
[798032-20151001221903980-337421481.jpg]: /images/20210923/dc64db78f28f48f7a33b9616e2c0c38f.png
[798032-20151001222411496-2108175128.jpg]: /images/20210923/71ea49ff2d5a4167bf1080276060c24f.png
[798032-20151001223133246-1825830145.jpg]: /images/20210923/be6970cf57ed40a08b4f3cc16b5438ad.png
[798032-20151001223325933-2132941334.jpg]: /images/20210923/2e2bed70dd914d688f5a7d4a74bf05e9.png
[798032-20151001223343418-1587827304.jpg]: /images/20210923/eaff0a2bfaf542148bd3adae3ad47e1b.png
[798032-20151001223352308-1997317053.jpg]: /images/20210923/326b1493bd6046e2a63bd65628f03b45.png