目录
介绍
- 实现java springboot 导出dbf通过如下步骤
- 1.编写一个dbf工具类
- 2.实现通过传入一个文件地址名字，加一个list<hashmap>>
- 3.工具类会生成文件然后把list解析把数据生成dbf到文件中
- 4.通过response 返回给页面客户端文件
- 5.删除之前创建的本地dbf文件
- ok
依赖
<dependency>
<groupId>com.github.albfernandez</groupId>
<artifactId>javadbf</artifactId>
<version>1.9.4</version>
</dependency>
工具类
package com.superman.uitl;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import com.linuxense.javadbf.DBFDataType;
import com.linuxense.javadbf.DBFException;
import com.linuxense.javadbf.DBFField;
import com.linuxense.javadbf.DBFWriter;
/**
* dbf 工具
*
* @author yushen
*
*/
public class DBFUitl {
public static void main(String args[]) throws DBFException, IOException {
List<HashMap<String,Object>> listdata = new ArrayList<HashMap<String,Object>>();
HashMap<String,Object> m = new HashMap<String,Object>();
m.put("a", "1");
m.put("b", "1");
m.put("c", "1");
HashMap<String,Object> m2 = new HashMap<String,Object>();
m2.put("a", "1");
m2.put("b", "1");
m2.put("c", "1");
listdata.add(m2);
listdata.add(m);
exportdbf("c:/temp/test01.dbf",listdata);
}
/**
* list 生成 dbf
*
* @param dbfname 文件 名
* @param listdata 文件源数据
*
* @throws IOException
*/
public static void exportdbf(String dbfname,List<HashMap<String,Object>> listdata) throws IOException {
int i2 = 0;
for(String key : listdata.get(0).keySet()) {
i2++;
}
DBFField fields[] = new DBFField[i2];
int i = 0;
for(String key : listdata.get(0).keySet()) {
fields[i] = new DBFField();
fields[i].setName(key);
fields[i].setType(DBFDataType.CHARACTER);
fields[i].setLength(100);
i++;
}
FileOutputStream fos = new FileOutputStream(dbfname);
DBFWriter writer = new DBFWriter(fos);
writer.setFields(fields);
for (int j = 0; j < listdata.size(); j++) {
// HashMap<String,Object> m3 = listdata.get(j);
Object rowData[] = new Object[i];
int i1 = 0;
for(String key : listdata.get(j).keySet()) {
rowData[i1] = listdata.get(j).get(key);
i1++;
}
writer.addRecord(rowData);
}
writer.write(fos);
fos.close();
System.out.println("dbf文件生成！");
}
}
控制层
package com.superman.global.ctr;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.HashMap;
import java.util.List;
import javax.servlet.ServletContext;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.system.ApplicationHome;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;
import com.superman.global.service.PosetgresqlService;
import com.superman.uitl.DBFUitl;
/**
* 导出dbf文件
*
* @author yushen
*
*/
@RestController
public class ExportDbfFileCtr {
private static final Logger logger = LoggerFactory.getLogger(ExportDataCtr.class);
@Value("${ds.datasource.linktype}")
private String linktype;
@Autowired
private PosetgresqlService ps;
/**
* 导出excel get 请求 返回单个表数据 or 多个文件压缩后的 zip <P/>
* <p/>
*
*
* 测试地址规则 get : /ExportDataCtr/excel/{tables}/{page}/{pageSize}<P/>
* http://localhost:9997/export/dbf/cd/1/10000
*
* @param tables table 必传<P/>
* @param page 必传<P/>
* @param pageSize 必传<P/>
*
* @return 返回excel 文件<P/>
*
* @throws Exception<P/>
*
*/
@GetMapping(value = "/export/dbf/{tables}/{page}/{pageSize}")
public void getUserInfoEx(HttpServletResponse response, @PathVariable("tables") String tablesName,
@PathVariable("page") int page, @PathVariable("pageSize") int pageSize) throws Exception {
String tables = tablesName.replaceAll(" ", "");
if (tables.contains("--") || tables.equals(""))
return;
if(!tables.contains(",")) {// 单个走这个
HashMap<String, Object> map0 = new HashMap<String, Object>();
map0.put("sql", "select * from " + tables + " limit " + pageSize + " OFFSET " + (page - 1) * pageSize);
List<HashMap<String, Object>> userList = ps.getTableData(map0);
if (userList.size() == 0)
return;
ApplicationHome home = new ApplicationHome(getClass());
File jarFile = home.getSource();
String FilePath = jarFile.getParentFile().toString() + "/zorefile/";
File fileDir = new File(FilePath);
if (!fileDir.exists()) {
try {
// 按照指定的路径创建文件夹
fileDir.setWritable(true, false);
fileDir.mkdir();
} catch (Exception e) {
logger.info(e.toString());
}
}
DBFUitl.exportdbf(FilePath+tables+".dbf",userList);
retrunfile(FilePath,tables+".dbf",response);
delFile(FilePath+tables+".dbf");
return;
}
}
protected void retrunfile(String path, String filename,HttpServletResponse response) throws Exception {
response.setContentType("application/dbf");
response.setHeader("Location", filename);
response.setHeader("Content-Disposition", "attachment; filename=" + filename);
OutputStream outputStream = response.getOutputStream();
InputStream inputStream = new FileInputStream(path+filename);
byte[] buffer = new byte[1024];
int i = -1;
while ((i = inputStream.read(buffer)) != -1) {
outputStream.write(buffer, 0, i);
}
outputStream.flush();
outputStream.close();
inputStream.close();
outputStream = null;
}
static boolean delFile(String pathfile) {
File file = new File(pathfile);
if (!file.exists()) {
return false;
}
if (file.isFile()) {
return file.delete();
} else {
File[] files = file.listFiles();
for (File f : files) {
// delFile(f);
}
return file.delete();
}
}
}
ok
持续更新
