125 lines
3.5 KiB
Java
125 lines
3.5 KiB
Java
/**
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* Copyright (c) 2011-2019, James Zhan 詹波 (jfinal@126.com).
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.jfinal.template.source;
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import java.io.BufferedReader;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.InputStreamReader;
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import com.jfinal.template.EngineConfig;
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/**
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* FileSource 用于从普通文件中加载模板内容
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*/
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public class FileSource implements ISource {
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private String finalFileName;
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private String fileName;
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private String encoding;
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private long lastModified;
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public FileSource(String baseTemplatePath, String fileName, String encoding) {
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this.finalFileName = buildFinalFileName(baseTemplatePath, fileName);
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this.fileName = fileName;
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this.encoding= encoding;
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}
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public FileSource(String baseTemplatePath, String fileName) {
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this(baseTemplatePath, fileName, EngineConfig.DEFAULT_ENCODING);
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}
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public boolean isModified() {
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return lastModified != new File(finalFileName).lastModified();
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}
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public String getCacheKey() {
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return fileName;
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}
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public String getEncoding() {
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return encoding;
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}
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public String getFinalFileName() {
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return finalFileName;
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}
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public String getFileName() {
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return fileName;
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}
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public StringBuilder getContent() {
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File file = new File(finalFileName);
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if (!file.exists()) {
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throw new RuntimeException("File not found : " + finalFileName);
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}
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// 极为重要，否则在开发模式下 isModified() 一直返回 true，缓存一直失效（原因是 lastModified 默认值为 0）
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this.lastModified = file.lastModified();
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return loadFile(file, encoding);
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}
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private String buildFinalFileName(String baseTemplatePath, String fileName) {
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if (baseTemplatePath == null) {
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return fileName;
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}
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char firstChar = fileName.charAt(0);
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String finalFileName;
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if (firstChar == '/' || firstChar == '\\') {
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finalFileName = baseTemplatePath + fileName;
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} else {
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finalFileName = baseTemplatePath + File.separator + fileName;
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}
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return finalFileName;
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}
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public static StringBuilder loadFile(File file, String encoding) {
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StringBuilder ret = new StringBuilder((int)file.length() + 3);
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try (BufferedReader br = new BufferedReader(new InputStreamReader(new FileInputStream(file), encoding))) {
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// br = new BufferedReader(new FileReader(fileName));
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String line = br.readLine();
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if (line != null) {
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ret.append(line);
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} else {
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return ret;
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}
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while ((line=br.readLine()) != null) {
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ret.append('\n').append(line);
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}
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return ret;
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} catch (Exception e) {
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throw new RuntimeException(e);
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}
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}
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public String toString() {
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StringBuilder sb = new StringBuilder();
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sb.append("File name: ").append(fileName).append("\n");
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sb.append("Final file name: ").append(finalFileName).append("\n");
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sb.append("Last modified: ").append(lastModified).append("\n");
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return sb.toString();
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}
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}
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