提示詞

請用rust quickxml庫實現讀取xml的row和c標簽信息，并輸出到csv格式，要求是：數值型c，輸出標簽的內容，字符串型c(t = “inlineStr”)，輸出的內容，row的r屬性表是行號，c的r屬性是字母列號行號，如果不連續，就在中間補空列，用逗號分隔各列，一行完全輸出后換行，如果1行全為空，不輸出該行，為便于查對，每行開頭輸出row的r屬性行號，利用內存映射文件實現。只輸出代碼，不干別的。

use quick_xml::events::Event;
use quick_xml::Reader;
use memmap2::Mmap;
use std::fs::File;
use std::io::{self, Write};
use std::path::Path;fn main() -> io::Result<()> {let file_path = "input.xml";let file = File::open(file_path)?;let mmap = unsafe { Mmap::map(&file)? };let mut reader = Reader::from_reader(&mmap[..]);reader.trim_text(true);let mut buf = Vec::new();let mut current_row: Option<u32> = None;let mut current_cells: Vec<Option<String>> = Vec::new();let mut output = io::stdout();loop {match reader.read_event_into(&mut buf) {Ok(Event::Start(ref e)) => {match e.name().as_ref() {b"row" => {if let Some(attrs) = e.attributes().filter_map(Result::ok).find(|a| a.key.as_ref() == b"r") {if let Ok(r_val) = String::from_utf8(attrs.value.to_vec()) {current_row = r_val.parse().ok();}}current_cells.clear();}b"c" => {let mut cell_type = None;let mut cell_ref = None;for attr in e.attributes().filter_map(Result::ok) {match attr.key.as_ref() {b"t" => {cell_type = String::from_utf8(attr.value.to_vec()).ok();}b"r" => {cell_ref = String::from_utf8(attr.value.to_vec()).ok();}_ => {}}}let mut cell_value = None;let mut in_v = false;let mut in_t = false;loop {match reader.read_event_into(&mut buf) {Ok(Event::Start(ref e)) => {match e.name().as_ref() {b"v" => in_v = true,b"t" => in_t = true,_ => {}}}Ok(Event::Text(e)) => {if in_v || in_t {if let Ok(text) = e.unescape() {cell_value = Some(text.to_string());}}}Ok(Event::End(ref e)) => {if e.name().as_ref() == b"c" {break;}if e.name().as_ref() == b"v" {in_v = false;}if e.name().as_ref() == b"t" {in_t = false;}}Ok(Event::Eof) => break,_ => {}}}if let Some(c_ref) = cell_ref {if let Some(col) = parse_column(&c_ref) {while current_cells.len() <= col {current_cells.push(None);}current_cells[col] = cell_value;}}}_ => {}}}Ok(Event::End(ref e)) => {if e.name().as_ref() == b"row" {if let Some(row_num) = current_row {if current_cells.iter().any(Option::is_some) {write!(output, "{}", row_num)?;for cell in &current_cells {write!(output, ",")?;if let Some(val) = cell {write!(output, "\"{}\"", val)?;}}writeln!(output)?;}}current_row = None;current_cells.clear();}}Ok(Event::Eof) => break,Err(e) => {eprintln!("Error reading XML: {}", e);break;}_ => {}}buf.clear();}Ok(())
}fn parse_column(ref_str: &str) -> Option<usize> {let mut col_str = String::new();for c in ref_str.chars() {if c.is_ascii_alphabetic() {col_str.push(c);} else {break;}}if col_str.is_empty() {return None;}let mut col = 0;for c in col_str.chars() {col = col * 26 + (c.to_ascii_uppercase() as usize - 'A' as usize + 1);}Some(col - 1)
}

相應Cargo.toml

[package]
name = "xml-to-csv"
version = "0.1.0"
edition = "2024"[dependencies]
quick-xml = "0.31.0"
memmap2 = "0.9.0"

編譯執行

export CARGO_INCREMENTAL=1
export PATH=/par:/par/mold240/bin:$PATH
cargo build --release/par/xmlcsv/target/release# ./xml-to-csv
1,"1","15519","785","1","17.00","24386.67","0.04","0.02","N","O","35137.0","35107.0","35146.0","DELIVER IN PERSON","TRUCK","to beans x-ray carefull"
2,"1","6731","732","2","36.00","58958.28","0.09","0.06","N","O","35167.0","35123.0","35175.0","TAKE BACK RETURN","MAIL","according to the final foxes. qui"/par# time xmlcsv/target/release/xml-to-csv >quickxml.csvreal    1m28.133s
user    0m5.104s
sys     0m5.273s