2021-04-14|2021-04-14 Springboot项目向前端返回UTF-8编码的文件
看部署方式，jvm启动-浏览器直接访问【IP:PORT/sync/service/getdata】；部署在tomcat中【tomcat配置的IP:PORT/项目名/sync/service/getdata】
import javafx.application.Application;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.boot.web.servlet.support.SpringBootServletInitializer;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.*;
import java.net.URLEncoder;
import java.nio.charset.Charset;
import java.util.Date;
@Controller
@SpringBootApplication
@MapperScan("cy.test.unit.dao")
public class UnitApplication extends SpringBootServletInitializer {@Value("${CSVFile.location}")
private String location;
public static void main(String[] args) {
SpringApplication.run(UnitApplication.class, args);
}@Override
protected SpringApplicationBuilder configure(SpringApplicationBuilder builder) {
return builder.sources(UnitApplication.class);
}/**
* 文件下载
*
* @param request
* @param response
* @return
*/
@RequestMapping("/sync/service/getdata")
public void downloadFile(HttpServletRequest request,
HttpServletResponse response, String name) throws Exception {
String FullPath = location + name;
//将文件的统一储存路径和文件名拼接得到文件全路径
File packetFile = new File(FullPath);
String fileName = packetFile.getName();
File file = new File(FullPath);
// 如果文件名存在，则进行下载
if (file.exists()) {
// 配置文件下载
response.setHeader("content-type", "application/octet-stream");
response.setContentType("text/plain;
charset=UTF-8");
// 下载文件能正常显示中文
response.setHeader("Content-Disposition", "attachment;
filename=" + URLEncoder.encode(fileName, "UTF-8"));
// 实现文件下载
//指定编码
InputStreamReader reader = new InputStreamReader(new FileInputStream(file));
OutputStream os = response.getOutputStream();
OutputStreamWriter writer = new OutputStreamWriter(os, "UTF-8");
char[] chs = new char[1024];
int len = 0;
while ((len = reader.read(chs)) != -1) {
writer.write(new String(chs, 0, len));
}
reader.close();
writer.flush();
writer.close();
} else {//对应文件不存在
}
}
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