我想把我的pdf文件转换成word,我已经搜索并找到了用于阅读pdf的文本和用于转换word的apache poi,我有一个如何使用它的问题:D hehe
public class MainActivity extends AppCompatActivity {
TextView browsefile, filename;
ImageView gambar;
int RequestFile = 2;
Context mContext;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
browsefile = findViewById(R.id.browsefile);
filename = findViewById(R.id.filename);
gambar = findViewById(R.id.gambarfile);
mContext = MainActivity.this;
browsefile.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
startOptionBrowseFile();
}
});
}
private void startOptionBrowseFile() {
Intent openFileIntent = new Intent(Intent.ACTION_GET_CONTENT);
openFileIntent.setType("*/*");
startActivityForResult(openFileIntent, RequestFile);
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data){
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == RequestFile && resultCode == RESULT_OK && data != null){
Uri selectedFile = data.getData();
File path = new File(selectedFile.getPath());
filename.setText(selectedFile.getPath());
XWPFDocument doc = new XWPFDocument();
String pdf = String.valueOf(path);
PdfReader reader = null;
try {
reader = new PdfReader(pdf);
} catch (IOException e) {
e.printStackTrace();
}
PdfReaderContentParser parser = new PdfReaderContentParser(reader);//逐页阅读PDF
for (int i = 1; i <= reader.getNumberOfPages(); i++) {
TextExtractionStrategy strategy = null;
try {
strategy = parser.processContent(i, new SimpleTextExtractionStrategy());
} catch (IOException e) {
e.printStackTrace();
}
// Extract the text
String text=strategy.getResultantText();
// Create a new paragraph in the word document, adding the extracted text
XWPFParagraph p = doc.createParagraph();
XWPFRun run = p.createRun();
run.setText(text);
// Adding a page break
run.addBreak(BreakType.PAGE);
}//编写word文档
FileOutputStream out = null;
try {
out = new FileOutputStream("myfile.docx");
} catch (FileNotFoundException e) {
e.printStackTrace();
}
try {
doc.write(out);
} catch (IOException e) {
e.printStackTrace();
}//关闭所有打开的文件
try {
out.close();
} catch (IOException e) {
e.printStackTrace();
}
reader.close();
}
}
}这就是错误

有人能帮我吗?如果有人能解决我的问题,我将不胜感激。
发布于 2020-07-17 06:53:03
解决方案
在类路径中找不到接口Paragraph。在较早的POI版本中会发生此故障,因为WL和SL接口位于poi jar中未包含的scratchpad中。
POI早于V4.1.2
使用4.1.2之前的版本时,还必须将poi-scrachpad库作为依赖项添加到类路径/ build.gradle中
请参阅https://mvnrepository.com/artifact/org.apache.poi/poi-scratchpad
切换到POI V4.1.2
正如您在https://github.com/apache/poi/commit/f2dba42227abb4edf0ba0313972762974585693f上看到的,WP和SL接口已于2015年5月28日通过此提交移动到版本4.1.2
因此,如果您使用的是4.1.2,那么您只需要在类路径/build.gradle中找到一个专用的POI库jar,并且必须找到段落接口(参见https://mvnrepository.com/artifact/org.apache.poi)。
如果问题仍然存在,请确保已将相关点库添加为implementation从属关系,而不是仅针对test。
build.gradle示例:
dependencies {
// https://mvnrepository.com/artifact/org.apache.poi/poi-ooxml
compile group: 'org.apache.poi', name: 'poi-ooxml', version: '4.1.2'
}https://stackoverflow.com/questions/62942989
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