java 图表导出pdf组件

接着上一次所说的，没看过的可跳转
Jasper（1）——入门

第一阶段：初步导出PDF

Jasper报表设计

点击 Static Text，并拖动到 title 位置

然后双击此框，根据需要修改，可看下图

修改好后可以调一下蓝线（各个band的高度）或者如图所示

或者如下图修改

接着Page Header我随便弄了点中文，跟title差不多

在弄Column Header和Detail部分之前，先做点东西~

outline视图，右键field -> Create Field

你会看到如下图的亚子

比如我这个field是id，类型为Integer，看String是不符的，因此如下图操作

这样，id列名就创好啦~接下来如法炮制，创建name和school列名，两者都是String类型

接下来，我们把它们拖动到Detail部分，然后慢慢调整弄整齐

PS：拖到Detail的时候，Column Header也对应有一个框（Static Text）！

其实，看到图中，是否会有问“$F{id}”是啥意思？

其实Detail的框是Text Field，双击一看，如图

Column Footer我就随便写了哈，不展示了

Page Footer一般是写页码之类的，我就用个函数，如下图所示

Summary部分我这边加一个入参，这个入参创建参考上面的field即可

这样一个报表就完成啦~可以预先浏览

这里就是对应该xml的源码

编译该文件

这样设计报表部分完成！

Java代码导出部分

本次我用Springboot来进行pdf导出

文件目录大概是这样

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>org.example</groupId>
    <artifactId>jasperdemo</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>jar</packaging>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.4.8</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>
        <dependency>
            <groupId>net.sf.jasperreports</groupId>
            <artifactId>jasperreports</artifactId>
            <version>5.6.1</version>
            <exclusions>
                <exclusion>
                    <groupId>org.olap4j</groupId>
                    <artifactId>olap4j</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

        <dependency>
            <groupId>org.olap4j</groupId>
            <artifactId>olap4j</artifactId>
            <version>0.9.7.309-JS-3</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/com.itextpdf/itextpdf -->
        <dependency>
            <groupId>com.itextpdf</groupId>
            <artifactId>itextpdf</artifactId>
            <version>5.5.11</version>
        </dependency>


        <!-- https://mvnrepository.com/artifact/jfree/jcommon -->
        <dependency>
            <groupId>jfree</groupId>
            <artifactId>jcommon</artifactId>
            <version>1.0.15</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/jfree/jfreechart -->
        <dependency>
            <groupId>jfree</groupId>
            <artifactId>jfreechart</artifactId>
            <version>1.0.12</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.codehaus.groovy/groovy-all -->
        <dependency>
            <groupId>org.codehaus.groovy</groupId>
            <artifactId>groovy-all</artifactId>
            <version>2.0.1</version>
        </dependency>
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi</artifactId>
            <version>3.16</version>
        </dependency>
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi-ooxml</artifactId>
            <version>3.17</version>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
</project>

本次我将用模拟数据来演示，创建一个Student类

package com.copa.domain;

import lombok.AllArgsConstructor;
import lombok.Data;

/**
 * @author copa
 * @createDate 2021-07-25 21:51
 * @function
 */
@Data
@AllArgsConstructor
public class Student {

    private Integer id;

    private String name;

    private String school;
}

controller

package com.copa.controller;

import com.copa.domain.Student;
import net.sf.jasperreports.engine.JRException;
import net.sf.jasperreports.engine.JasperExportManager;
import net.sf.jasperreports.engine.JasperFillManager;
import net.sf.jasperreports.engine.JasperPrint;
import net.sf.jasperreports.engine.data.JRBeanCollectionDataSource;
import org.springframework.core.io.ClassPathResource;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Map;

/**
 * @author copa
 * @createDate 2021-07-25 21:02
 * @function 导出pdf
 */
@RestController
public class TestController {

    @RequestMapping(value = "/pdf1")
    public void pdf1(Map<String, Object> parameters,
                                        HttpServletResponse response) throws IOException {
        ServletOutputStream os = response.getOutputStream();
        try {
            ArrayList<Student> list = new ArrayList<>();
            for (int i = 1; i <= 40; i++) {
                list.add(new Student(i, "copa" + i, i <= 20 ? "一中" : "二中"));
            }
            JRBeanCollectionDataSource dataSource = new JRBeanCollectionDataSource(list);
            parameters = parameters == null ? new HashMap<>() : parameters;
            parameters.put("summary", "我是summary~");
            ClassPathResource resource = new ClassPathResource("jasper/demo1.jasper");
            response.setContentType("application/pdf");
            InputStream jasperStream = resource.getInputStream();
            JasperPrint jasperPrint = JasperFillManager.fillReport(jasperStream, parameters, dataSource);
            JasperExportManager.exportReportToPdfStream(jasperPrint, os);
        } catch (JRException e) {
            e.printStackTrace();
        } finally {
            os.flush();
        }
    }
}

那么，启动项目，查看效果

http://localhost:8080/pdf1

看起来…好像没边框很别扭，那么我们返回去加边框

重新编译，覆盖文件，再次尝试~

这样，边框就出来了~但是，有没有看到有些内容没显示的o(╥﹏╥)o

这是…中文的问题…因为Jasper它没考虑到中文，查看它的源码可知

第二阶段：解决中文问题

首先，从网上找字体，比如下图

然后这里添加字体

这样就添加好字体了，然后给显示中文的都换上这个字体

然后编译并覆盖

在java代码这一块，创建下图几个文件

ttf文件是你在报表设计时用到的字体文件

font.xml

<?xml version="1.0" encoding="UTF-8"?>
<fontFamilies>
    <fontFamily name="是微软雅黑吖">
        <normal>jasper/fonts/msyh.ttf</normal>
        <bold>jasper/fonts/msyh.ttf</bold>
        <italic>jasper/fonts/msyh.ttf</italic>
        <boldItalic>jasper/fonts/msyh.ttf</boldItalic>
        <pdfEncoding>Identity-H</pdfEncoding>
        <pdfEmbedded>true</pdfEmbedded>
        <exportFonts>
            <export key="net.sf.jasperreports.html">'是微软雅黑吖', Arial, Helvetica, sans-serif</export>
            <export key="net.sf.jasperreports.xhtml">'是微软雅黑吖', Arial, Helvetica, sans-serif</export>
        </exportFonts>
    </fontFamily>
</fontFamilies>

jasperreports_extension.properties

net.sf.jasperreports.extension.registry.factory.simple.font.families=net.sf.jasperreports.engine.fonts.SimpleFontExtensionsRegistryFactory
net.sf.jasperreports.extension.simple.font.families.dejavu=jasper/fonts/fonts.xml

添加完成后，再次运行

http://localhost:8080/pdf1 这样就成功啦~

底部也对应显示~

这样导出PDF报表就完成啦~

O(∩_∩)O~