poi解析word为html时空指针异常处理-向日葵屋

poi解析word为html时空指针异常处理

poi操作word后，将生成的word解析为html时报空指针异常，于是跟踪代码发现三处poi的空指针异常处理不严谨的地方。

1.package org.apache.poi.xwpf.converter.core包下的XWPFDocumentVisitor类中的getXWPFNum方法

原代码：

protected XWPFNum getXWPFNum(CTNumPr numPr) { 
        CTDecimalNumber numID = numPr.getNumId();
        if (numID == null) { 
            return null;
        } else { 
            XWPFNum num = this.document.getNumbering().getNum(numID.getVal());
            return num;
        }
    }

修改后：

protected XWPFNum getXWPFNum(CTNumPr numPr) { 
        CTDecimalNumber numID = numPr.getNumId();
        if (Objects.isNull(numID)) { 
            return null;
        }
        XWPFNumbering numbering = document.getNumbering();
        if (Objects.isNull(numbering)) { 
            return null;
        }
        XWPFNum num = numbering.getNum(numID.getVal());
        return num;
    }

2.package org.apache.poi.xwpf.converter.core.styles.run包下的RunUnderlineValueProvider类中的getValue方法。

原代码：

public UnderlinePatterns getValue(CTRPr rPr, XWPFStylesDocument stylesDocument) { 
        return rPr != null && rPr.isSetU() ? UnderlinePatterns.valueOf(rPr.getU().getVal().intValue()) : null;
    }

修改后：

@Override
    public UnderlinePatterns getValue(CTRPr rPr, XWPFStylesDocument stylesDocument) { 
        if(rPr == null) { 
            return null;
        }
        if(rPr.isSetU()) { 
            CTUnderline u = rPr.getU();
            if(u != null) { 
                Enum val = u.getVal();
                if(val != null) { 
                    return UnderlinePatterns.valueOf(val.intValue());
                }
            }
        }
        return null;

3.package org.apache.poi.xwpf.converter.core.styles.table.cell包下的TableCellWidthValueProvider类中的getTableWidth方法。

源代码：

public TableWidth getTableWidth(CTTblWidth tblWidth) { 
        if (tblWidth == null) { 
            return null;
        } else { 
            float width = XWPFTableUtil.getTblWidthW(tblWidth);
            boolean percentUnit = 2 == tblWidth.getType().intValue();
            if (percentUnit) { 
                width /= 100.0F;
            } else { 
                width = DxaUtil.dxa2points(width);
            }
            return new TableWidth(width, percentUnit);
        }
    }
}

修改后：

public TableWidth getTableWidth(CTTblWidth tblWidth) { 
        if (tblWidth == null) { 
            return null;
        } else { 
            float width = XWPFTableUtil.getTblWidthW(tblWidth);
            boolean percentUnit = false;
            if(tblWidth.getType()!=null){ 
                percentUnit = 2 == tblWidth.getType().intValue();
            }
            if (percentUnit) { 
                width /= 100.0F;
            } else { 
                width = DxaUtil.dxa2points(width);
            }
            return new TableWidth(width, percentUnit);
        }
    }