ContentNegotiatingViewResolver多种输出格式实例: json/jsp/xml/xls/pdf

本例用的是javaConfig配置

以pizza为例。

json输出需要用到的包：

jackson-databind 2.4.1.3

jackson-annotations 2.4.1

pdf需要用到的包：

lowagie itext 4.2.1

xls需要用到的包：

Apache POI 3.10-beta2

xml包

spring-oxm

访问地址：

http://localhost:8080/gugua9/hello/aaa.xml

http://localhost:8080/gugua9/hello/aaa.json

http://localhost:8080/gugua9/hello/aaa

http://localhost:8080/gugua9/hello/aaa.xls

http://localhost:8080/gugua9/hello/aaa.pdf

pom.xml配置：

<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/maven-v4_0_0.xsd">

  <modelVersion>4.0.0</modelVersion>

  <groupId>gugua4</groupId>

  <artifactId>gugua8</artifactId>

  <packaging>war</packaging>

  <version>0.0.1-SNAPSHOT</version>

  <name>gugua8 Maven Webapp</name>

  <url>http://maven.apache.org</url>

  <properties>

  	<springVersion>4.3.5.RELEASE</springVersion>

  </properties>

  <dependencies>

     <!-- spring-test支持 -->

    <dependency>

    	<groupId>org.springframework</groupId>

    	<artifactId>spring-test</artifactId>

    	<version>${springVersion}</version>

    </dependency>

    <dependency>

      <groupId>junit</groupId>

      <artifactId>junit</artifactId>

      <version>4.11</version>

      <scope>test</scope>

    </dependency>

      <!-- spring模块库 -->

    <dependency>

    	<groupId>org.springframework</groupId>

    	<artifactId>spring-beans</artifactId>

    	<version>${springVersion}</version>

    </dependency>

    <dependency>

    	<groupId>org.springframework</groupId>

    	<artifactId>spring-web</artifactId>

    	<version>${springVersion}</version>

    </dependency>

    <dependency>

    	<groupId>org.springframework</groupId>

    	<artifactId>spring-webmvc</artifactId>

    	<version>${springVersion}</version>

    </dependency> 

    <!-- Needed for XML View (with JAXB2) -->

	<dependency>

		<groupId>org.springframework</groupId>

		<artifactId>spring-oxm</artifactId>

		<version>${springVersion}</version>

	</dependency>

	<!-- Needed for JSON View -->

	<dependency>

		<groupId>com.fasterxml.jackson.core</groupId>

		<artifactId>jackson-databind</artifactId>

		<version>2.7.4</version>

	</dependency>

	<dependency>

		<groupId>com.fasterxml.jackson.core</groupId>

		<artifactId>jackson-annotations</artifactId>

		<version>2.7.4</version>

	</dependency>

	<!-- Needed for PDF View -->

	<dependency>

		<groupId>com.lowagie</groupId>

		<artifactId>itext</artifactId>

		<version>2.1.7</version>

	</dependency>

    <!-- Needed for XLS View -->

	<dependency>

		<groupId>org.apache.poi</groupId>

		<artifactId>poi</artifactId>

		<version>3.10-beta2</version>

	</dependency>

	<!-- Servlet dependencies -->

		<dependency>

			<groupId>javax.servlet</groupId>

			<artifactId>javax.servlet-api</artifactId>

			<version>3.1.0</version>

		</dependency>

		 <!-- servlet(HttpServletRequest,HttpServletResponse) -->

		<dependency>

		    <groupId>javax.servlet</groupId>

		    <artifactId>jstl</artifactId>

		    <version>1.2</version>

		</dependency>

		<dependency>

			<groupId>javax.servlet.jsp</groupId>

			<artifactId>javax.servlet.jsp-api</artifactId>

			<version>2.3.1</version>

		</dependency>

	<dependency>

         <groupId>taglibs</groupId>

         <artifactId>standard</artifactId>

         <version>1.1.2</version>

     </dependency>

  </dependencies>

  <build>

  	<pluginManagement>

  		<plugins>

  			<plugin>

  				<groupId>org.apache.maven.plugins</groupId>

  				<artifactId>maven-war-plugin</artifactId>

  				<version>2.6</version>

  				<configuration>

  					<warSourceDirectory>src/main/webapp</warSourceDirectory>

  					<warName>gugua8</warName>

  					<failOnMissingWebXml>false</failOnMissingWebXml>

  				</configuration>

  			</plugin>

  		<!-- define the project compile level -->

         <plugin>

            <groupId>org.apache.maven.plugins</groupId>

            <artifactId>maven-compiler-plugin</artifactId>

            <configuration>

                <source>1.8</source>

                <target>1.8</target>

            </configuration>

        </plugin> 

  		</plugins>

  	</pluginManagement>

    <finalName>gugua8</finalName>

  </build>

</project>

注意可能会发生的几个错误：

解决maven项目Cannot change version of project facet Dynamic web module to 3.0/3.1

https://www.cnblogs.com/achengmu/p/9101669.html

maven项目Java resources 上面有个红叉但是代码里面并没有什么报错

https://www.cnblogs.com/achengmu/p/9106953.html

pizza.java

package springmvc.model;

import java.util.ArrayList;

import java.util.List;

import javax.xml.bind.annotation.XmlElement;

import javax.xml.bind.annotation.XmlRootElement;

@XmlRootElement(name = "pizza")

public class Pizza {

	private String name;

	private String flavor;

	private List<String> toppings = new ArrayList<String>();

	public Pizza()

	{

	}

	public Pizza(String name){

		this.name = name;

		this.flavor = "spicy";

		this.toppings.add("Cheese");

		this.toppings.add("bakon");

	}

	public String getName() {

		return name;

	}

	@XmlElement

	public void setName(String name) {

		this.name = name;

	}

	public String getFlavor() {

		return flavor;

	}

	@XmlElement

	public void setFlavor(String flavor) {

		this.flavor = flavor;

	}

	public List<String> getToppings() {

		return toppings;

	}

	public void setToppings(List<String> toppings) {

		this.toppings = toppings;

	}

}

AppController.java

package springmvc.controller;

import org.springframework.stereotype.Controller;

import org.springframework.ui.ModelMap;

import org.springframework.web.bind.annotation.PathVariable;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.RequestMethod;

import springmvc.model.Pizza;

@Controller

public class AppController {

	@RequestMapping(value="/pizza/{name}", method=RequestMethod.GET)

	public String getPizza( ModelMap model,  @PathVariable(value="name") String name)

	{

		model.addAttribute("message", name);

		Pizza pizza = new Pizza(name);

		model.addAttribute("pizza", pizza);

		return "test";

	}

}

初始化

AppInitializer.java

package springmvc.configuration;

import org.springframework.web.servlet.support.AbstractAnnotationConfigDispatcherServletInitializer;

public class AppInitializer extends AbstractAnnotationConfigDispatcherServletInitializer {

	@Override

	protected Class<?>[] getRootConfigClasses() {

		// TODO Auto-generated method stub

		return new Class[] { AppConfig.class };

	}

	@Override

	protected Class<?>[] getServletConfigClasses() {

		// TODO Auto-generated method stub

		return null;

	}

	@Override

	protected String[] getServletMappings() {

		// TODO Auto-generated method stub

		return new String [] { "/" };

	}

}

配置
AppConfig.java

package springmvc.configuration;

import java.util.ArrayList;

import java.util.List;

import org.springframework.context.annotation.Bean;

import org.springframework.context.annotation.ComponentScan;

import org.springframework.context.annotation.Configuration;

import org.springframework.http.MediaType;

import org.springframework.oxm.jaxb.Jaxb2Marshaller;

import org.springframework.web.servlet.ViewResolver;

import org.springframework.web.servlet.view.ContentNegotiatingViewResolver;

import org.springframework.web.servlet.view.InternalResourceViewResolver;

import org.springframework.web.servlet.view.JstlView;

import springmvc.model.Pizza;

import springmve.viewresolver.ExcelViewResolver;

import springmve.viewresolver.Jaxb2MarshallingXmlVierResolver;

import springmve.viewresolver.JsonViewResolver;

import springmve.viewresolver.PdfViewResolver;

import org.springframework.web.accept.ContentNegotiationManager;

import org.springframework.web.servlet.config.annotation.ContentNegotiationConfigurer;

import org.springframework.web.servlet.config.annotation.EnableWebMvc;

import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;

@Configuration

@EnableWebMvc

@ComponentScan(basePackages="springmvc")

public class AppConfig  extends WebMvcConfigurerAdapter{

	@Override

	public void configureContentNegotiation(ContentNegotiationConfigurer configurer) {

		// TODO Auto-generated method stub

		//super.configureContentNegotiation(configurer);

		configurer.ignoreAcceptHeader(true).defaultContentType(MediaType.TEXT_HTML);

	}

	@Bean

	public ViewResolver contentNegotiatingViewResolver(ContentNegotiationManager manager)

	{

		ContentNegotiatingViewResolver resolver = new ContentNegotiatingViewResolver();

		resolver.setContentNegotiationManager(manager);

		List<ViewResolver> resolvers = new ArrayList<ViewResolver>();

		resolvers.add(jspViewResolver());

		resolvers.add(jaxb2MarshallingViewResolver());

		resolvers.add(jsonViewResolver());

		resolvers.add(excelViewResolver());

		resolvers.add(pdfVierResolver());

		resolver.setViewResolvers(resolvers);

		return resolver;

	}

	@Bean

	public ViewResolver jaxb2MarshallingViewResolver()

	{

		Jaxb2Marshaller marshaller = new Jaxb2Marshaller();

		marshaller.setClassesToBeBound(Pizza.class);

		return new Jaxb2MarshallingXmlVierResolver(marshaller);

	}

	@Bean

	public ViewResolver jsonViewResolver()

	{

		return new JsonViewResolver();

	}

	@Bean

	public ViewResolver jspViewResolver()

	{

		InternalResourceViewResolver viewResolver = new InternalResourceViewResolver();

		viewResolver.setViewClass(JstlView.class);

		viewResolver.setPrefix("/WEB-INF/views/");

		viewResolver.setSuffix(".jsp");

		return viewResolver;

	}

	@Bean

	public ViewResolver excelViewResolver()

	{

		return new ExcelViewResolver();

	}

	@Bean

	public ViewResolver pdfVierResolver()

	{

		return new PdfViewResolver();

	}

}

相关的插件

json实现

package springmve.viewresolver;

import java.util.Locale;

import org.springframework.web.servlet.View;

import org.springframework.web.servlet.ViewResolver;

import org.springframework.web.servlet.view.json.MappingJackson2JsonView;

public class JsonViewResolver implements ViewResolver {

	public View resolveViewName(String viewName, Locale locale) throws Exception {

		// TODO Auto-generated method stub

		MappingJackson2JsonView view  = new MappingJackson2JsonView();

		view.setPrefixJson(true);

		return view;

	}

}

spring的xml

package springmve.viewresolver;

import java.util.Locale;

import org.springframework.web.servlet.View;

import org.springframework.web.servlet.ViewResolver;

import org.springframework.oxm.Marshaller;

import org.springframework.web.servlet.view.xml.MarshallingView;

public class Jaxb2MarshallingXmlVierResolver implements ViewResolver {

	private Marshaller marshaller;

	public Jaxb2MarshallingXmlVierResolver(Marshaller marshaller)

	{

		this.marshaller = marshaller;

	}

	public View resolveViewName(String viewName, Locale locale) throws Exception {

		// TODO Auto-generated method stub

		MarshallingView view = new MarshallingView();

		view.setMarshaller(marshaller);

		return view;

	}

}

excel-xls的实现（spring-AbstractExcelView）

package springmve.viewresolver;

import java.util.Map;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import org.apache.poi.hssf.usermodel.HSSFWorkbook;

import org.apache.poi.ss.usermodel.Cell;

import org.apache.poi.ss.usermodel.CellStyle;

import org.apache.poi.ss.usermodel.IndexedColors;

import org.apache.poi.ss.usermodel.Row;

import org.apache.poi.ss.usermodel.Sheet;

import org.springframework.web.servlet.view.document.AbstractExcelView;

import springmvc.model.Pizza;

public class ExcelView extends AbstractExcelView {

	@Override

	protected void buildExcelDocument(Map<String, Object> model, HSSFWorkbook workbook, HttpServletRequest request,

			HttpServletResponse response) throws Exception {

		// TODO Auto-generated method stub

		Pizza pizza = (Pizza) model.get("pizza");

		//创建工作簿

		Sheet sheet = workbook.createSheet("sheel");

		//工作簿样式

		CellStyle style = workbook.createCellStyle();

		style.setFillBackgroundColor(IndexedColors.GREY_40_PERCENT.index);

		style.setFillPattern(CellStyle.SOLID_FOREGROUND);

		style.setAlignment(CellStyle.ALIGN_CENTER);

		Row row = null;

		Cell cell = null;

		int rowCount = 0;

		int colCount = 0;

		//create-table

		row = sheet.createRow(rowCount++);

		cell = row.createCell(colCount++);

		cell.setCellStyle(style);

		cell.setCellValue("name");

		cell = row.createCell(colCount++);

		cell.setCellStyle(style);

		cell.setCellValue("flavor");

		cell = row.createCell(colCount++);

		cell.setCellStyle(style);

		cell.setCellValue("toppings");

		//set-value

		row = sheet.createRow(rowCount++);

		colCount = 0;

		row.createCell(colCount++).setCellValue(pizza.getName());

		row.createCell(colCount++).setCellValue(pizza.getFlavor());

		StringBuffer toppings = new StringBuffer();

		for(String topping: pizza.getToppings())

		{

			toppings.append(topping);

			toppings.append(" ");

		}

		row.createCell(colCount++).setCellValue(toppings.toString());

		//for(int i = 0; i<3; i++)

		//{

		//	sheet.autoSizeColumn(i);

		//}

	}

}

package springmve.viewresolver;

import java.util.Locale;

import org.springframework.web.servlet.View;

import org.springframework.web.servlet.ViewResolver;

public class ExcelViewResolver implements ViewResolver {

	@Override

	public View resolveViewName(String viewName, Locale locale) throws Exception {

		// TODO Auto-generated method stub

		ExcelView view = new ExcelView();

		return view;

	}

}

pdf的实现(spring-AbstractPdfView)

package springmve.viewresolver;

import java.awt.Color;

import java.util.Map;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import org.springframework.web.servlet.view.document.AbstractPdfView;

import com.lowagie.text.Document;

import com.lowagie.text.Element;

import com.lowagie.text.pdf.PdfPTable;

import com.lowagie.text.pdf.PdfWriter;

import springmvc.model.Pizza;

public class PdfView extends AbstractPdfView {

	@Override

	protected void buildPdfDocument(Map<String, Object> model, Document document, PdfWriter writer,

			HttpServletRequest request, HttpServletResponse response) throws Exception {

		// TODO Auto-generated method stub

		Pizza pizza = (Pizza) model.get("pizza");

		PdfPTable table = new PdfPTable(3);

		//对齐方式

		table.getDefaultCell().setHorizontalAlignment(Element.ALIGN_CENTER);

		table.getDefaultCell().setVerticalAlignment(Element.ALIGN_CENTER);

		table.getDefaultCell().setBackgroundColor(Color.lightGray);

		//表头

		table.addCell("name");

		table.addCell("flavor");

		table.addCell("toppings");

		//内容

		table.addCell(pizza.getName());

		table.addCell(pizza.getFlavor());

		StringBuffer toppings = new StringBuffer();

		for(String topping: pizza.getToppings())

		{

			toppings.append(topping);

			toppings.append(" ");

		}

		table.addCell(toppings.toString());

		document.add(table);

	}

}

package springmve.viewresolver;

import java.util.Locale;

import org.springframework.web.servlet.View;

import org.springframework.web.servlet.ViewResolver;

public class PdfViewResolver implements ViewResolver {

	@Override

	public View resolveViewName(String viewName, Locale locale) throws Exception {

		// TODO Auto-generated method stub

		PdfView view = new PdfView();

		return view;

	}

}

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