如何通过jasper报告依赖项接收sqlcmd请求并以base64 pdf形式发送响应[重复]

问题描述 投票：0回答：1

我编写了一个粗略的程序，该程序的目标是成为一个能够接收请求的程序。请求的语言是 SQL cmd，它将请求发送到 PostgreSQL 数据库，并将响应作为来自 PostgreSQL 数据库的数据发送，然后获取数据。在jrxml文件中插入或填充，然后最后转换为base64 PDF， 我试图编写它，但自从单词开始生成以来发生了错误。

使用的程序：eclipse、spring boot 3及以上以及Java 17、21、PostgreSQL数据库。

错误

[2m2024-01-18T15:35:33.425+07:00[0;39m [32m INFO[0;39m [35m32224[0;39m [2m---[0;39m [2m[nio-8080-exec-2][0;39m [2m[0;39m[36mo.s.web.servlet.DispatcherServlet       [0;39m [2m:[0;39m Completed initialization in 2 ms
start generate
[2m2024-01-18T15:35:34.012+07:00[0;39m [31mERROR[0;39m [35m32224[0;39m [2m---[0;39m [2m[nio-8080-exec-2][0;39m [2m[0;39m[36mo.a.c.c.C.[.[.[/].[dispatcherServlet]   [0;39m [2m:[0;39m Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed: net.sf.jasperreports.engine.JRException: Class not found when loading object from file: C:\Users\Teamking\eclipse-workspace\Npdf\target\classes\pdf.jasper.] with root cause

java.lang.ClassNotFoundException: net.sf.jasperreports.compilers.ReportExpressionEvaluationData
    at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:641) ~[na:na]
    at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:188) ~[na:na]
    at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:525) ~[na:na]
    at java.base/java.lang.Class.forName0(Native Method) ~[na:na]
    at java.base/java.lang.Class.forName(Class.java:467) ~[na:na]
    at java.base/java.io.ObjectInputStream.resolveClass(ObjectInputStream.java:773) ~[na:na]
    at net.sf.jasperreports.engine.util.ContextClassLoaderObjectInputStream.resolveClass(ContextClassLoaderObjectInputStream.java:89) ~[jasperreports-6.12.2.jar:6.12.2-75c5e90a222ab406e416cbf590a5397028a52de3]
    at java.base/java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:2034) ~[na:na]
    at java.base/java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1898) ~[na:na]
    at java.base/java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2224) ~[na:na]
    at java.base/java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1733) ~[na:na]
    at java.base/java.io.ObjectInputStream$FieldValues.<init>(ObjectInputStream.java:2606) ~[na:na]
    at java.base/java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2457) ~[na:na]
    at java.base/java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2257) ~[na:na]
    at java.base/java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1733) ~[na:na]
    at java.base/java.io.ObjectInputStream$FieldValues.<init>(ObjectInputStream.java:2606) ~[na:na]
    at java.base/java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2457) ~[na:na]
    at java.base/java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2257) ~[na:na]
    at java.base/java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1733) ~[na:na]
    at java.base/java.io.ObjectInputStream.readObject(ObjectInputStream.java:509) ~[na:na]
    at java.base/java.io.ObjectInputStream.readObject(ObjectInputStream.java:467) ~[na:na]
    at net.sf.jasperreports.engine.util.JRLoader.loadObject(JRLoader.java:140) ~[jasperreports-6.12.2.jar:6.12.2-75c5e90a222ab406e416cbf590a5397028a52de3]
    at net.sf.jasperreports.engine.util.JRLoader.loadObject(JRLoader.java:116) ~[jasperreports-6.12.2.jar:6.12.2-75c5e90a222ab406e416cbf590a5397028a52de3]
    at net.sf.jasperreports.engine.JasperFillManager.getReportSource(JasperFillManager.java:1105) ~[jasperreports-6.12.2.jar:6.12.2-75c5e90a222ab406e416cbf590a5397028a52de3]
    at net.sf.jasperreports.engine.JasperFillManager.fill(JasperFillManager.java:652) ~[jasperreports-6.12.2.jar:6.12.2-75c5e90a222ab406e416cbf590a5397028a52de3]
    at net.sf.jasperreports.engine.JasperFillManager.fillReport(JasperFillManager.java:1020) ~[jasperreports-6.12.2.jar:6.12.2-75c5e90a222ab406e416cbf590a5397028a52de3]
    at com.example.demo.service.ReportGenerateService.generate(ReportGenerateService.java:30) ~[classes/:na]
    at com.example.demo.controller.ExportPDFpart1Controller.exportReportFromJrxml(ExportPDFpart1Controller.java:41) ~[classes/:na]
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77) ~[na:na]
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
    at java.base/java.lang.reflect.Method.invoke(Method.java:568) ~[na:na]
    at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:262) ~[spring-web-6.1.2.jar:6.1.2]
    at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:190) ~[spring-web-6.1.2.jar:6.1.2]
    at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:118) ~[spring-webmvc-6.1.2.jar:6.1.2]
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:917) ~[spring-webmvc-6.1.2.jar:6.1.2]
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:829) ~[spring-webmvc-6.1.2.jar:6.1.2]
    at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-6.1.2.jar:6.1.2]
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1089) ~[spring-webmvc-6.1.2.jar:6.1.2]
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:979) ~[spring-webmvc-6.1.2.jar:6.1.2]
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1014) ~[spring-webmvc-6.1.2.jar:6.1.2]
    at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:914) ~[spring-webmvc-6.1.2.jar:6.1.2]
    at jakarta.servlet.http.HttpServlet.service(HttpServlet.java:590) ~[tomcat-embed-core-10.1.17.jar:6.0]
    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:885) ~[spring-webmvc-6.1.2.jar:6.1.2]
    at jakarta.servlet.http.HttpServlet.service(HttpServlet.java:658) ~[tomcat-embed-core-10.1.17.jar:6.0]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:205) ~[tomcat-embed-core-10.1.17.jar:10.1.17]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149) ~[tomcat-embed-core-10.1.17.jar:10.1.17]
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51) ~[tomcat-embed-websocket-10.1.17.jar:10.1.17]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174) ~[tomcat-embed-core-10.1.17.jar:10.1.17]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149) ~[tomcat-embed-core-10.1.17.jar:10.1.17]
    at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100) ~[spring-web-6.1.2.jar:6.1.2]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116) ~[spring-web-6.1.2.jar:6.1.2]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174) ~[tomcat-embed-core-10.1.17.jar:10.1.17]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149) ~[tomcat-embed-core-10.1.17.jar:10.1.17]
    at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93) ~[spring-web-6.1.2.jar:6.1.2]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116) ~[spring-web-6.1.2.jar:6.1.2]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174) ~[tomcat-embed-core-10.1.17.jar:10.1.17]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149) ~[tomcat-embed-core-10.1.17.jar:10.1.17]
    at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) ~[spring-web-6.1.2.jar:6.1.2]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116) ~[spring-web-6.1.2.jar:6.1.2]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174) ~[tomcat-embed-core-10.1.17.jar:10.1.17]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149) ~[tomcat-embed-core-10.1.17.jar:10.1.17]
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:167) ~[tomcat-embed-core-10.1.17.jar:10.1.17]
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:90) ~[tomcat-embed-core-10.1.17.jar:10.1.17]
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:482) ~[tomcat-embed-core-10.1.17.jar:10.1.17]
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:115) ~[tomcat-embed-core-10.1.17.jar:10.1.17]
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:93) ~[tomcat-embed-core-10.1.17.jar:10.1.17]
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74) ~[tomcat-embed-core-10.1.17.jar:10.1.17]
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:340) ~[tomcat-embed-core-10.1.17.jar:10.1.17]
    at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:391) ~[tomcat-embed-core-10.1.17.jar:10.1.17]
    at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:63) ~[tomcat-embed-core-10.1.17.jar:10.1.17]
    at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:896) ~[tomcat-embed-core-10.1.17.jar:10.1.17]
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1744) ~[tomcat-embed-core-10.1.17.jar:10.1.17]
    at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:52) ~[tomcat-embed-core-10.1.17.jar:10.1.17]
    at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191) ~[tomcat-embed-core-10.1.17.jar:10.1.17]
    at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659) ~[tomcat-embed-core-10.1.17.jar:10.1.17]
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) ~[tomcat-embed-core-10.1.17.jar:10.1.17]
    at java.base/java.lang.Thread.run(Thread.java:840) ~[na:na]

这是我的代码：

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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>3.2.1</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.example</groupId>
    <artifactId>Npdf</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>Npdf</name>
    <description>Demo project for Spring Boot</description>
    <properties>
        <java.version>17</java.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.postgresql</groupId>
            <artifactId>postgresql</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>net.sf.jasperreports</groupId>
            <artifactId>jasperreports</artifactId>
            <version>6.12.2</version>
        </dependency>
    </dependencies>

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

</project>

导出JR请求

package com.example.demo.bean;

public class ExportJRRequest {
    
    private String sqlCommand;
    
    public String getSqlCommand() {
        return sqlCommand;
    }

    public void setSqlCommand(String sqlCommand) {
        this.sqlCommand = sqlCommand;
    }

}

导出JRResponse

package com.example.demo.bean;

public class ExportJRResponse {
    
    private String pdfBase64;

    public String getPdfBase64() {
        return pdfBase64;
    }

    public void setPdfBase64(String pdfBase64) {
        this.pdfBase64 = pdfBase64;
    }
    
}

导出PDFpart1控制器

package com.example.demo.controller;
    
import java.util.ArrayList;
import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController;

import com.example.demo.bean.ExportJRRequest;
import com.example.demo.bean.ExportJRResponse;
import com.example.demo.model.EmployeeModel;
import com.example.demo.service.InquiryService;
import com.example.demo.service.ReportGenerateService;

import net.sf.jasperreports.repo.ReportCompiler;
    
@RestController
@RequestMapping("export")
public class ExportPDFpart1Controller {
    
    @Autowired
    private InquiryService inquiryService;
    
    @Autowired
    private ReportGenerateService reportGenerateService;
    
    
    @PostMapping(path ="/part1")
    public @ResponseBody ExportJRResponse exportReportFromJrxml( @RequestBody ExportJRRequest req) throws Exception {
        
        ExportJRResponse res = new ExportJRResponse();
        
        //1
        List<EmployeeModel> data = inquiryService.executeEmployeeQuery(req.getSqlCommand());
        
        //2
        String base64 = reportGenerateService.generate(data);
        
        res.setPdfBase64(base64);
        
        return res;
    }
}

员工模型

package com.example.demo.model;

import java.io.Serializable;

import jakarta.persistence.Column;
import jakarta.persistence.Entity;
import jakarta.persistence.GeneratedValue;
import jakarta.persistence.GenerationType;
import jakarta.persistence.Id;
import jakarta.persistence.Table;

@Entity
@Table(name = "employee")
public class EmployeeModel implements Serializable {
    private static final long serialVersionUID = 1L;
    
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private long empid;
    
    @Column(name = "name")
    private String name;
    
    @Column(name = "salary")
    private String salary;
    
    @Column(name = "dept")
    private String dept;
    
    @Column(name = "position")
    private String position;
    
    public EmployeeModel() {
        super();
    }
    
    public EmployeeModel(long empid, String name, String salary, String dept, String position) {
        super();
        this.empid = empid;
        this.name = name;
        this.salary = salary;
        this.dept = dept;
        this.position = position;
    }

    public long getEmpid() {
        return empid;
    }

    public void setEmpid(long empid) {
        this.empid = empid;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getSalary() {
        return salary;
    }

    public void setSalary(String salary) {
        this.salary = salary;
    }
    public String getDept() {
        return dept;
    }

    public void setDept(String dept) {
        this.dept = dept;
    }

    public String getPosition() {
        return position;
    }

    public void setPosition(String position) {
        this.position = position;
    }


}

员工存储库

package com.example.demo.repository;

import java.util.List;

import org.springframework.data.jpa.repository.JpaRepository;

import com.example.demo.model.EmployeeModel;



public interface EmployeeRepository extends JpaRepository<EmployeeModel, Long> {
    
    List<EmployeeModel> findAll();
    
}

咨询服务

package com.example.demo.service;

import java.sql.Connection;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import com.example.demo.model.EmployeeModel;

import jakarta.persistence.EntityManager;
import jakarta.persistence.Query;

@Service
public class InquiryService {
    
    @Autowired
    private EntityManager entityManager;
    
    public List<EmployeeModel> executeEmployeeQuery(String sql) {
        Query query = entityManager.createNativeQuery(sql, EmployeeModel.class);
        return query.getResultList();
    }

}

报告生成服务

package com.example.demo.service;

import java.io.FileNotFoundException;
import java.util.ArrayList;
import java.util.Base64;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.springframework.stereotype.Service;
import org.springframework.util.ResourceUtils;

import com.example.demo.model.EmployeeModel;

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;

@Service
public class ReportGenerateService {
    
    
    public String generate(List<EmployeeModel> data ) throws FileNotFoundException, JRException  {
        System.out.println("start generate");
        String sourceFileName = ResourceUtils.getFile(ResourceUtils.CLASSPATH_URL_PREFIX + "pdf.jasper").getAbsolutePath();
        JRBeanCollectionDataSource beanColDataSource = new JRBeanCollectionDataSource(data);
        Map parameters = new HashMap();
        JasperPrint jasperPrint = JasperFillManager.fillReport(sourceFileName, parameters, beanColDataSource);
        byte[] bPdf = JasperExportManager.exportReportToPdf(jasperPrint);
        return  Base64.getEncoder().encodeToString(bPdf);
        
    }
    
}

请给我一些建议，因为这是我第一次开始这份工作，这是我需要完成的项目计划。目前，我需要完成第1部分的API，如图所示：

enter image description here

jasper-reports
1个回答
0
投票

堆栈跟踪表明您使用jasperreports-6.12.2.jar来运行报告，但编译后的报告（*.jasper文件）引用了JasperReports 6.13.0中引入的net.sf.jasperreports.compilers.ReportExpressionEvaluationData。

您需要确保用于运行报告的 JasperReports 版本与用于生成编译报告的版本相同或更新。

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