首先是要搞到viewservert的原始碼。然後定義自己的檔名稱生成類JpmsFilenameGenerator，我是這樣寫的。

package com.kong.report.web.utils;

import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Map;

import javax.servlet.http.HttpServletRequestWrapper;

import org.eclipse.birt.report.utility.filename.IFilenameGenerator;

/**
 * @author kong
 * @create 2017年9月26日下午5:30:06
 */
public class JpmsFilenameGenerator implements IFilenameGenerator {
	
	public static final String DEFAULT_FILENAME = "BIRTReport"; //$NON-NLS-1$

	public JpmsFilenameGenerator(){}
	
	/**
	* @see org.eclipse.birt.report.utility.filename.IFilenameGenerator#getExportFilename(String,String,Map)
	*/
	@SuppressWarnings("rawtypes")
	@Override
	public String getFilename(String baseName, String extension, String outputType, Map options) {
		String exportName = _getExportName(options);
		if(exportName !=null && !"null".equalsIgnoreCase(exportName)){
			baseName = exportName;
		}
		return makeFileName(baseName, extension);
	}

	@SuppressWarnings("rawtypes")
	private String _getExportName(Map options) {
		String exportName=null;
		Object obj = options.get("httpRequest");
		if(obj !=null){
			HttpServletRequestWrapper request = (HttpServletRequestWrapper)obj;
			String time = request.getParameter("time");//報表時間
			String reportName = request.getParameter("fileName"); //日報名稱
			exportName = time + "_" + reportName + "_匯出時間";
		}
		return exportName;
	}

	/**
	* Makes a filename using the target extension from the options.
	* @param fileName file name which extension must be replaced
	* @return file name with replaced extension
	*/
	public static String makeFileName( String fileName, String extensionName ) {
		String baseName = fileName;
		if (baseName == null || baseName.trim().length() <= 0) {
			baseName = DEFAULT_FILENAME;
		}
		baseName +="_" + new SimpleDateFormat("yyyy-MM-dd_HH.mm.ss").format(new Date());//報表匯出時間
		// append extension name
		if (extensionName != null && extensionName.length() > 0) {
			baseName += "." + extensionName; //$NON-NLS-1$
		}
		return baseName;
	}
}
 

網上‘_getExportName’方法的其它寫法。

private String _getExportName(Map options) {
    String exportName=null;
    Object obj = options.get("httpRequest");
    if(obj !=null && obj instanceof RequestFacade){
        RequestFacade request = (RequestFacade)obj;
        exportName = ParameterAccessor.getParameter(request,"__exportName");
    }
    return exportName;
}
 

• 然後在web.xml裡新增下面的配置：

• 最後修改一下FramesetFragment這個類的doPreService方法，有一段設定檔案編碼的

String filename = ParameterAccessor.getExportFilename(new BirtContext(request, response), format, emitterId);
response.setHeader("Content-Disposition", openType + "; filename=\"" + filename + "\""); 
 

更改為

String filename = ParameterAccessor.getExportFilename( new BirtContext( request, response ), format, emitterId );
String filedisplay = URLEncoder.encode(filename,"utf-8");
filedisplay = filedisplay.replace("+","%20");//將＋替換成空格; 
response.setHeader( "Content-Disposition", //$NON-NLS-1$
	ParameterAccessor.htmlEncode( openType )
	+ "; filename=\"" //$NON-NLS-1$
	+ ParameterAccessor.htmlEncode( filedisplay )
	+ "\"" );

小插曲~
Tomcat中URIEncoding要設定好，要不然就中文亂碼。

<Connector URIEncoding="UTF-8" connectionTimeout="20000" port="8080" protocol="HTTP/1.1" redirectPort="8443"/>

ok,呼叫的時候通過在呼叫報表的url上拼接引數    fileName="這是中文報表"就Ok了。

var fileName = '這是中文報表';
var basePath = '<%=basePath%>';
var birtUrl = 'frameset?__report=gate_day_report.rptdesign&__showtitle=false&__toolbar=false&__navigationbar=false&__parameterpage=false';
var jsonUrl = '${param.jsonUrl}'+'gate/day/generateBirt&gateId='+gateId+'&time='+time+'&fileName='+fileName;
var print = '__format='+printType+'&__pageoverflow=0&__asattachment=true&__overwrite=false';
window.location.href = birtUrl + "&JSONURL=" + jsonUrl + "&" + print;

然後就打印出中文檔名文件了。

修改原始碼後的jar包可以跳轉到下面地址下載

https://download.csdn.net/download/wzg921/10405196

推薦個小軟體：class檔案可以用jd-gui檢視，但是沒法更改。

如有錯誤之處，望指正。