itext学习

IText基本模板
导入itext的maven依赖

com.itextpdf
itextpdf
5.5.7

写生成地址
创建文档
获取输出流
打开文档
添加内容
关闭文档
// 生成文件名和地址

public static final String RESULT="C:/Users/founder/Desktop/Itext/hello.pdf" ;

public static void main(String[] args) throws FileNotFoundException, DocumentException {
    new HelloIText().createPdf(RESULT);
}
public void createPdf(String filename) throws FileNotFoundException, DocumentException {

// 创建实例文档
Document document = new Document();
// 获取pdfwriter实例
PdfWriter.getInstance(document,new FileOutputStream(filename));
// 打开文档
document.open();
// 添加内容
document.add(new Paragraph(“hello itext!”));
// 关闭文档
document.close();
}

输出中文
public class IText {

public static void main(String[] args) throws IOException {
    PdfWriter writer = new PdfWriter("1.pdf");
    PdfDocument pdf = new PdfDocument(writer);
    Document document = new Document(pdf);
    PdfFont sysFont = PdfFontFactory.createFont("src/main/resources/font/kai.ttf", PdfEncodings.IDENTITY_H,true);
    document.add(new Paragraph("这是我的").setFont(sysFont));
    document.close();
}

}

生成pdf报表且输出中文

package com.guxin.study_demo.Itext;

import java.util.ArrayList;
import java.util.List;

import com.itextpdf.io.font.PdfEncodings;
import com.itextpdf.kernel.font.PdfFont;
import com.itextpdf.kernel.font.PdfFontFactory;
import com.itextpdf.kernel.pdf.PdfDocument;
import com.itextpdf.kernel.pdf.PdfWriter;
import com.itextpdf.layout.Document;
import com.itextpdf.layout.element.Cell;
import com.itextpdf.layout.element.Paragraph;
import com.itextpdf.layout.element.Table;
import com.itextpdf.layout.property.UnitValue;

public class test {
public static final String RESULT=“C:/Users/founder/Desktop/Itext/FirstTable.pdf” ;

public static void main(String[] args) throws Exception {

    //构建容器
    //生成的pdf文件名
    PdfWriter writer = new PdfWriter(RESULT);
    PdfDocument pdf = new PdfDocument(writer);
    Document document = new Document(pdf);
    //使用系统本地字体，可以解决生成的pdf中无法显示中文问题，本处字体为宋体
    //可以直接把例如： src/main/resources/font/kai.ttf字体所在的路径
    //在创建字体时直接使用即可解决中文问题
    PdfFont sysFont = PdfFontFactory.createFont("src/main/resources/font/kai.ttf", PdfEncodings.IDENTITY_H,true);
    //添加文本
    document.add(new Paragraph("Hello World!"));
    //添加图片

    //定义表格
    Table table = new Table(4);
    table.setWidth(UnitValue.createPercentValue(100));
    //自定义的封装表格数据
    formatData(table,getUsers(),sysFont);
    document.add(table);
    document.close();
}

public static List getUsers(){
    List list = new ArrayList();
    User  user = null;
    for(int i=0;i<5;i++){
        user = new User();
        user.setId(i);
        user.setName("ss "+i);
        user.setAdd("西安--"+i);
        user.setMemo("这是备注"+i);
        list.add(user);
    }
    return list;
}

public static void formatData(Table table,List list,PdfFont font){
    table.addCell(new Cell().add(new Paragraph(" 字段名称 ").setFont(font)));
    table.addCell(new Cell().add(new Paragraph(" 数据类型 ").setFont(font)));
    table.addCell(new Cell().add(new Paragraph(" 约束 ").setFont(font)));
    table.addCell(new Cell().add(new Paragraph(" 备注 ").setFont(font)));
    for(User user : list){
        table.addCell(new Cell().add(new Paragraph(user.getId()+"")));
        table.addCell(new Cell().add(new Paragraph(user.getName()).setFont(font)));
        //测试数据中，add属性中含有中文，所以 需要设置字体
        table.addCell(new Cell().add(new Paragraph(user.getAdd()).setFont(font)));
        table.addCell(new Cell().add(new Paragraph(user.getMemo()).setFont(font)));
    }
}

}
相较于之前转中文方式较为繁琐
可以直接 给document设置一个整体的font
Document document = new Document(pdf);
PdfFont sysFont = PdfFontFactory.createFont(“src/main/resources/font/kai.ttf”, PdfEncodings.IDENTITY_H,true);
document.setFont(sysFont);

package com.guxin.study_demo.Itext;

import com.itextpdf.io.font.PdfEncodings;
import com.itextpdf.kernel.color.Color;
import com.itextpdf.kernel.font.PdfFont;
import com.itextpdf.kernel.font.PdfFontFactory;
import com.itextpdf.kernel.pdf.PdfDocument;
import com.itextpdf.kernel.pdf.PdfWriter;
import com.itextpdf.layout.Document;
import com.itextpdf.layout.element.Cell;
import com.itextpdf.layout.element.Paragraph;
import com.itextpdf.layout.element.Table;
import java.io.IOException;

public class IText {

public static void main(String[] args) throws IOException {
    PdfWriter writer = new PdfWriter("1.pdf");
    PdfDocument pdf = new PdfDocument(writer);
    Document document = new Document(pdf);
    PdfFont sysFont = PdfFontFactory.createFont("src/main/resources/font/kai.ttf", PdfEncodings.IDENTITY_H,true);
    document.setFont(sysFont);
    document.add(new Paragraph("这是我的").setRelativePosition(pdf.getDefaultPageSize().getWidth()/2-100, 10, pdf.getDefaultPageSize().getWidth()/2,pdf.getDefaultPageSize().getHeight()).setFontSize(20));
    Table table = new Table(4);
    table.addCell(new Cell().add(new Paragraph("字段名称").setFontSize(15).setFontColor(Color.RED)));
    table.addCell(new Cell().add(new Paragraph("数据类型").setFontSize(15).setFontColor(Color.RED)));
    table.addCell(new Cell().add(new Paragraph("约束").setFontSize(15).setFontColor(Color.RED)));
    table.addCell(new Cell().add(new Paragraph("备注").setFontSize(15).setFontColor(Color.RED)));
    for (int i = 0; i <5 ; i++) {
        table.addCell(new Cell().add(new Paragraph("字段名称"+i).setFontSize(15).setFontColor(Color.GRAY)));
        table.addCell(new Cell().add(new Paragraph("数据类型"+i).setFontSize(15).setFontColor(Color.GRAY)));
        table.addCell(new Cell().add(new Paragraph("约束"+i).setFontSize(15).setFontColor(Color.GRAY)));
        table.addCell(new Cell().add(new Paragraph("备注"+i).setFontSize(15).setFontColor(Color.GRAY)));
    }
    document.add(table);
    document.close();

}

}

在本地模拟数据库

package com.guxin.study_demo.Itext;

import java.util.Collection;
import java.util.HashMap;
import java.util.Map;
public class DataBase {
private static Map userMap=null;
static {
userMap=new HashMap();
userMap.put(1,new User(1,“精灵1”,“笨蛋”,“绿色的”));
userMap.put(0,new User(0,“精灵1”,“笨蛋”,“绿色的”));
userMap.put(2,new User(2,“精灵1”,“笨蛋”,“绿色的”));
userMap.put(3,new User(3,“精灵1”,“笨蛋”,“绿色的”));
userMap.put(4,new User(4,“精灵1”,“笨蛋”,“绿色的”));
userMap.put(5,new User(5,“精灵1”,“笨蛋”,“绿色的”));
userMap.put(6,new User(6,“精灵1”,“笨蛋”,“绿色的”));

}
public Collection getUsers(){
return userMap.values();
}
public User getUserBy(Integer id){

    return userMap.get(id);
}

}

通过itext访问生成报表

package com.guxin.study_demo.Itext;

import com.itextpdf.io.font.PdfEncodings;
import com.itextpdf.kernel.color.Color;
import com.itextpdf.kernel.font.PdfFont;
import com.itextpdf.kernel.font.PdfFontFactory;
import com.itextpdf.kernel.pdf.PdfDocument;
import com.itextpdf.kernel.pdf.PdfWriter;
import com.itextpdf.layout.Document;
import com.itextpdf.layout.element.Cell;
import com.itextpdf.layout.element.Paragraph;
import com.itextpdf.layout.element.Table;

import java.io.IOException;
import java.util.Collection;

public class IText {

public static void main(String[] args) throws IOException {
    PdfWriter writer = new PdfWriter("1.pdf");
    PdfDocument pdf = new PdfDocument(writer);
    Document document = new Document(pdf);
    PdfFont sysFont = PdfFontFactory.createFont("src/main/resources/font/kai.ttf", PdfEncodings.IDENTITY_H,true);
    document.setFont(sysFont);
    document.add(new Paragraph("这是我的").setRelativePosition(pdf.getDefaultPageSize().getWidth()/2-100, 10, pdf.getDefaultPageSize().getWidth()/2,pdf.getDefaultPageSize().getHeight()).setFontSize(20));
    Table table = new Table(4);
    table.addCell(new Cell().add(new Paragraph("字段名称").setFontSize(15).setFontColor(Color.RED)));
    table.addCell(new Cell().add(new Paragraph("数据类型").setFontSize(15).setFontColor(Color.RED)));
    table.addCell(new Cell().add(new Paragraph("约束").setFontSize(15).setFontColor(Color.RED)));
    table.addCell(new Cell().add(new Paragraph("备注").setFontSize(15).setFontColor(Color.RED)));
    Collection users = new DataBase().getUsers();
    for (int i = 0; i