在springboot mybatisplus环境下,easyPOI使用模板导出excel案例的完整代码(含相关工具类)
时间: 2024-09-19 15:09:03 浏览: 49
在Spring Boot MybatisPlus环境中使用EasyPoi模板导出Excel,首先你需要添加必要的依赖,如Spring Boot、Mybatis Plus、EasyExcel等。这里是一个简单的示例代码和相关的工具类:
**Step 1: 添加依赖**
在`pom.xml`中添加依赖:
```xml
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>com.baomidou</groupId>
<artifactId>mybatis-plus-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>easyexcel-spring-boot-starter</artifactId>
<version>最新版本号</version>
</dependency>
<!-- 如果需要富文本支持,可以添加 -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
</dependency>
</dependencies>
```
替换`最新版本号`为你项目中FastJson的实际版本。
**Step 2: 创建实体类 (Entity)**
例如,假设我们有一个名为`User`的实体:
```java
import com.baomidou.mybatisplus.annotation.TableName;
import com.baomidou.mybatisplus.extension.model.JSONable;
@TableName("users")
public class User implements JSONable {
private Long id;
private String name;
private String email;
// getters and setters...
}
```
**Step 3: 创建数据服务类 (Service)**
```java
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import com.baomidou.mybatisplus.core.toolkit.Wrappers;
import com.baomidou.mybatisplus.extension.plugins.Page;
import com.baomidou.mybatisplus.extension.service.impl.BaseService;
import com.example.demo.entity.User;
import com.example.demo.mapper.UserMapper;
@Service
public class UserService extends BaseService<UserMapper, User> {
@Autowired
public UserService(UserMapper userMapper) {
super(userMapper);
}
public Page<User> getUsers(int pageNum, int pageSize) {
return userMapper.selectPage(new Page<>(pageNum, pageSize), Wrappers.lambdaQuery(User.class));
}
}
```
**Step 4: 工具类 (Util)**
创建一个工具类来处理EasyExcel的数据映射和模板导入:
```java
import com.alibaba.excel.EasyExcel;
import com.alibaba.excel.read.metadata.ReadSheet;
import com.alibaba.excel.write.metadata.WriteSheet;
import java.io.File;
import java.util.List;
public class ExcelUtils {
public static void export(List<User> users, String fileName, String outputPath) {
WriteSheet writeSheet = EasyExcel.writer(outputPath)
.registerWriteHandler(WriteHandler.create())
.build();
try {
EasyExcel.write(fileName, User.class, writeSheet).sheet("用户").doWrite(users);
} catch (Exception e) {
e.printStackTrace();
}
}
public static List<User> importUsers(String filePath) {
ReadSheet readSheet = EasyExcel.reader(filePath)
.doRead(User.class)
.sheet().read();
return readSheet.getData();
}
// 其他工具方法...
}
```
**Step 5: 测试类 (Test)**
```java
import org.junit.jupiter.api.Test;
import com.example.demo.service.UserService;
import com.example.demo.utils.ExcelUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import java.io.File;
@SpringBootTest
public class ApplicationTests {
@Autowired
private UserService userService;
@Test
public void testExportAndImport() {
List<User> userList = userService.getUsers(0, 10); // 获取数据
// 导出到文件
File outputFile = new File("output.xlsx");
ExcelUtils.export(userList, "用户信息", outputFile.getAbsolutePath());
// 从文件导入
List<User> importedUsers = ExcelUtils.importUsers(outputFile.getAbsolutePath());
// 验证导入数据是否正确
assert userList.equals(importedUsers); // 这里只是做个简单比较,实际应用中应该做更详细的验证
}
}
```
这就是一个基本的Spring Boot MybatisPlus配合EasyExcel导出Excel的例子。在实际项目中,记得根据实际情况调整代码,比如异常处理、日志记录等。
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