MyBatisPlus条件构造器带条件排序方法orderBy、orderByDesc、orderByAsc使用示例代码

package com.badao.test; import java.sql.Connection; import java.util.ArrayList; import java.util.Arrays; import java.util.HashMap; import java.util.List; import java.util.Map; import javax.sql.DataSource; import org.junit.Test; import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext; import com.badao.beans.Employee; import com.badao.mapper.EmployeeMapper; import com.baomidou.mybatisplus.mapper.EntityWrapper; import com.baomidou.mybatisplus.plugins.Page; public class TestMp { private ApplicationContext ioc = new ClassPathXmlApplicationContext("applicationContext.xml"); private EmployeeMapper employeeMapper =ioc.getBean("employeeMapper",EmployeeMapper.class); @Test public void testDataSource() throws Exception{ DataSource ds = ioc.getBean("dataSource",DataSource.class); System.out.println("******************************************"+ds); Connection connection = ds.getConnection(); System.out.println("******************************************"+connection); } /*** * 测试通用插入操作 */ @Test public void testCommonInsert() { Employee employee = new Employee(); employee.setName("霸道插入测试"); employee.setAge(23); employee.setEmail("123@163.com"); employee.setGender(1); int result = employeeMapper.insert(employee); System.out.println("************************"+result); } /*** * 测试插入数据获取主键 */ @Test public void testInsertReturnId() { Employee employee = new Employee(); employee.setName("霸道获取主键"); employee.setAge(23); employee.setEmail("123@163.com"); employee.setGender(1); int result = employeeMapper.insert(employee); System.out.println("************************"+result); Integer id = employee.getId(); System.out.println("*********************"+id); } /*** * 测试insert */ @Test public void testInsert() { Employee employee = new Employee(); employee.setName("insert测试"); employee.setAge(23); int result = employeeMapper.insert(employee); System.out.println("************************"+result); Integer id = employee.getId(); System.out.println("*********************"+id); } /*** * 测试insertAllColumn */ @Test public void testInsertAllColumn() { Employee employee = new Employee(); employee.setName("insertAllColumn测试"); employee.setAge(23); int result = employeeMapper.insertAllColumn(employee); System.out.println("************************"+result); Integer id = employee.getId(); System.out.println("*********************"+id); } /*** * 通用更新操作 */ @Test public void testCommomUpdate() { // Employee employee = new Employee(); employee.setId(1); employee.setName("更新测试成功"); int result=employeeMapper.updateById(employee); System.out.println("*******************"+result); } /*** * updateAllColumnById操作 */ @Test public void testCommomUpdateAllColumnById() { Employee employee = new Employee(); employee.setId(2); employee.setName("更新测试成功"); int result=employeeMapper.updateAllColumnById(employee); System.out.println("*******************"+result); } /*** * 通用查询操作 通过ID查询 */ @Test public void testCommomSelectById() { Employee employee=employeeMapper.selectById(1); System.out.println("*******************"+employee); } /*** * 通用查询操作 selectOne 最多只能查到一个 */ @Test public void testCommomSelectOne() { Employee employee = new Employee(); employee.setId(3); employee.setName("气质"); Employee employeeresult=employeeMapper.selectOne(employee); System.out.println("*******************"+employeeresult); } /*** * 通用查询操作 selectBatchIds 通过多个ID进行查询 */ @Test public void testCommomSelectBatchIds() { List<Integer> idList = new ArrayList<Integer>(); idList.add(1); idList.add(2); idList.add(3); List<Employee>employeeList=employeeMapper.selectBatchIds(idList); System.out.println("*******************"+employeeList); for (Employee employee : employeeList) { System.out.println(employee.getName()); } } /*** * 通用查询操作 selectByMap map要写列名条件 不能是实体属性名 */ @Test public void testCommomSelectByMap() { Map<String, Object> columnMap = new HashMap<String, Object>(); columnMap.put("name", "气质"); columnMap.put("gender", "0"); List<Employee> employeeList=employeeMapper.selectByMap(columnMap); System.out.println("*******************"+employeeList); for (Employee employee : employeeList) { System.out.println(employee.getName()); } } /*** * 通用查询操作 selectByPage */ @Test public void testCommomSelectByPage() { List<Employee> employeeList=employeeMapper.selectPage(new Page<Object>(2, 2), null); System.out.println("*******************"+employeeList); for (Employee employee : employeeList) { System.out.println(employee.getName()); } } /*** * 通用删除操作 通过ID删除 */ @Test public void testCommomDeleteById() { int result=employeeMapper.deleteById(8); System.out.println("*******************"+result); } /*** * 通用删除操作 deleteByMap map要写列名条件 不能是实体属性名 */ @Test public void testCommomDeleteByMap() { Map<String, Object> columnMap = new HashMap<String, Object>(); columnMap.put("name", "更新测试成功"); columnMap.put("gender", "1"); int result=employeeMapper.deleteByMap(columnMap); System.out.println("*******************"+result); } /*** * 通用查询操作 deleteBatchIds 通过多个ID进行删除 */ @Test public void testCommomDeleteBatchIds() { List<Integer> idList = new ArrayList<Integer>(); idList.add(5); idList.add(6); int result=employeeMapper.deleteBatchIds(idList); System.out.println("*******************"+result); } /*** *条件构造器 查询操作selectPage */ @Test public void testEntitymapperSelect() { //分页查询数据库，年龄字段在某个区间内,并且性别为男(1)，并且名字为霸道的记录 List<Employee> employeeList=employeeMapper.selectPage(new Page<Object>(1, 2), new EntityWrapper<Employee>() .between("age", 20, 30) .eq("gender",1) .eq("name", "霸道") ); System.out.println("*******************"+employeeList); for (Employee employee : employeeList) { System.out.println(employee.getName()); } } /*** *条件构造器 查询操作SelectList */ @Test public void testEntitymapperSelectList() { //查询数据库，性别为男(1)，并且名字中带有霸的记录或者email中带有123的记录。 List<Employee> employeeList=employeeMapper.selectList(new EntityWrapper<Employee>() .eq("gender",1) .like("name", "霸") //.or()//SELECT id AS id,`name`,email,gender,age FROM employee WHERE (gender = ? AND name LIKE ? OR email LIKE ?) .orNew()//SELECT id AS id,`name`,email,gender,age FROM employee WHERE (gender = ? AND name LIKE ?) OR (email LIKE ?) .like("email", "123") ); System.out.println("*******************"+employeeList); for (Employee employee : employeeList) { System.out.println(employee.getName()); } } /*** *条件构造器 更新操作 */ @Test public void testEntitymapperUpdate() { Employee employee =new Employee(); employee.setEmail("456@163.com"); employeeMapper.update(employee,new EntityWrapper<Employee>() .eq("gender",1) .like("name", "霸") ); } /*** *条件构造器 删除操作 */ @Test public void testEntitymapperDelete() { employeeMapper.delete(new EntityWrapper<Employee>() .