07点睛Spring MVC4.1-ContentNegotiatingViewResolver

转发地址：https://www.iteye.com/blog/wiselyman-2214965

7.1 ContentNegotiatingViewResolver

ContentNegotiatingViewResolver支持在Spring MVC下输出不同的格式;
ContentNegotiatingViewResolver是ViewResolver的一个实现;
ContentNegotiatingViewResolver使用request的媒体类型,根据扩展名选择不同的view输出不同的格式;
ContentNegotiatingViewResolver不是自己处理view,而是代理给不同的ViewResolver来处理不同的view;
本例演示根据扩展名获得不同的页面;
jsp
- view:WEB-INF/views/demoObj.jsp
- viewResolver:UrlBasedViewResolver或InternalResourceViewResolver
pdf
- view:PdfView
- viewResolver:PdfViewResolver
json
- view:MappingJackson2JsonView
- viewResolver:JsonViewResolver
xml
- view:MarshallingView
- viewResolver:XmlViewResolver
xls
- view:XlsView
- viewResolver:XlsViewResolver

7.2 示例

7.2.1 添加依赖

依赖

json依赖03点睛Spring MVC 4.1-REST已添加
xml

<dependency>

  <groupId>org.springframework</groupId>

  <artifactId>spring-oxm</artifactId>

  <version>${spring-framework.version}</version>

</dependency>

<dependency>

  <groupId>com.lowagie</groupId>

  <artifactId>itext</artifactId>

  <version>4.2.1</version>

</dependency>

<dependency>

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

  <artifactId>poi</artifactId>

  <version>3.10-beta2</version>

</dependency>

7.2.2 定制view和viewResolve

7.2.2.1 pdf

7.2.2.1.1 view

 package com.wisely.view;

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 com.wisely.domain.DemoObj;

public class PdfView extends AbstractPdfView {

    @Override

    protected void buildPdfDocument(Map<String, Object> model,

            Document document, PdfWriter writer, HttpServletRequest request,

            HttpServletResponse response) throws Exception {

        DemoObj demoObj = (DemoObj) model.get("demoObj");

        PdfPTable table = new PdfPTable(2);

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

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

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

        table.addCell("ID");

        table.addCell("NAME");

        table.addCell(demoObj.getId().toString());

        table.addCell(demoObj.getName());

        document.add(table);

    }

}

7.2.2.1.2 viewResolver

package com.wisely.viewresolver;

import java.util.Locale;

import org.springframework.web.servlet.View;

import org.springframework.web.servlet.ViewResolver;

import com.wisely.view.PdfView;

public class PdfViewResolver implements ViewResolver{

    @Override

    public View resolveViewName(String viewName, Locale locale)

            throws Exception {

        return new PdfView();

    }

}

7.2.2.2 xls

7.2.2.2.1 view

package com.wisely.view;

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 com.wisely.domain.DemoObj;

public class XlsView extends AbstractExcelView{

    @Override

    protected void buildExcelDocument(Map<String, Object> model,

            HSSFWorkbook workbook, HttpServletRequest request,

            HttpServletResponse response) throws Exception {

         DemoObj demoObj = (DemoObj) model.get("demoObj");

            Sheet sheet = workbook.createSheet("sheet1");

            CellStyle style = workbook.createCellStyle();

            style.setFillForegroundColor(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;

            // 创建头部

            row = sheet.createRow(rowCount++);

            cell = row.createCell(colCount++);

            cell.setCellStyle(style);

            cell.setCellValue("ID");

            cell = row.createCell(colCount++);

            cell.setCellStyle(style);

            cell.setCellValue("NAME");

            // 创建数据

            row = sheet.createRow(rowCount++);

            colCount = 0;

            row.createCell(colCount++).setCellValue(demoObj.getId());

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

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

                sheet.autoSizeColumn(i, true);

    }

}

7.2.2.2.2 viewResolver

package com.wisely.viewresolver;

import java.util.Locale;

import org.springframework.web.servlet.View;

import org.springframework.web.servlet.ViewResolver;

import com.wisely.view.XlsView;

public class XlsViewResolver implements ViewResolver{

    @Override

    public View resolveViewName(String viewName, Locale locale)

            throws Exception {

        return new XlsView();

    }

}

7.2.2.3 json

7.2.2.3.1 view

使用的是MappingJackson2JsonView

7.2.2.3.2 viewResolver

package com.wisely.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{

    @Override

    public View resolveViewName(String viewName, Locale locale)

            throws Exception {

        MappingJackson2JsonView view = new MappingJackson2JsonView();

        view.setPrettyPrint(true);

        return view;

    }

}

7.2.2.4 xml

7.2.2.4.1 DemoBean的额外配置

package com.wisely.domain;

import javax.xml.bind.annotation.XmlElement;

import javax.xml.bind.annotation.XmlRootElement;

@XmlRootElement(name = "demo")

public class DemoObj {

    private Long id;

    private String name;

    public DemoObj() {

        super();

    }

    public DemoObj(Long id, String name) {

        super();

        this.id = id;

        this.name = name;

    }

    public Long getId() {

        return id;

    }

    @XmlElement

    public void setId(Long id) {

        this.id = id;

    }

    public String getName() {

        return name;

    }

    @XmlElement

    public void setName(String name) {

        this.name = name;

    }

}

7.2.2.4.2 view

使用的是MarshallingView

7.2.2.4.3 viewResolver

package com.wisely.viewresolver;

import java.util.Locale;

import org.springframework.oxm.jaxb.Jaxb2Marshaller;

import org.springframework.web.servlet.View;

import org.springframework.web.servlet.ViewResolver;

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

import com.wisely.domain.DemoObj;

public class XmlViewResolver implements ViewResolver {

    @Override

    public View resolveViewName(String viewName, Locale locale)

            throws Exception {

        MarshallingView view = new MarshallingView();

        Jaxb2Marshaller marshaller = new Jaxb2Marshaller();

        marshaller.setClassesToBeBound(DemoObj.class);

        marshaller.setPackagesToScan("com.wisely.domain");

        view.setMarshaller(marshaller);

        return view;

    }

}

7.2.2.5 jsp

7.2.2.5.1 view

WEB-INF/views/demoObj.jsp

<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>

<%@ page language="java" contentType="text/html; charset=UTF-8"

    pageEncoding="UTF-8"%>

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">

<html>

<head>

<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">

<title>Insert title here</title>

</head>

<body>

        id/name <br/>

        ${demoObj.id}/${demoObj.name}

</body>

</html>

7.2.2.5.2 viewResolver

UrlBasedViewResolver或InternalResourceViewResolver

7.2.3 配置resolver

package com.wisely;

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.web.accept.ContentNegotiationManager;

import org.springframework.web.multipart.MultipartResolver;

import org.springframework.web.multipart.commons.CommonsMultipartResolver;

import org.springframework.web.servlet.ViewResolver;

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

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

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

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

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

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

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

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

import com.wisely.interceptors.DemoInteceptor;

import com.wisely.viewresolver.JsonViewResolver;

import com.wisely.viewresolver.PdfViewResolver;

import com.wisely.viewresolver.XlsViewResolver;

import com.wisely.viewresolver.XmlViewResolver;

@Configuration

@ComponentScan("com.wisely")

@EnableWebMvc

public class DemoMVCConfig extends WebMvcConfigurerAdapter {

    //在此---jsp viewResolver

    @Bean

    public UrlBasedViewResolver viewResolver() {

        UrlBasedViewResolver resolver = new UrlBasedViewResolver();

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

        resolver.setSuffix(".jsp");

        resolver.setViewClass(JstlView.class);

        return resolver;

    }

    // 注册自定义拦截器

    @Override

    public void addInterceptors(InterceptorRegistry registry) {

        registry.addInterceptor(demoInteceptor());

    }

    // 自定义拦截器

    @Bean

    public DemoInteceptor demoInteceptor() {

        return new DemoInteceptor();

    }

    // 静态资源映射

    @Override

    public void addResourceHandlers(ResourceHandlerRegistry registry) {

        registry.addResourceHandler("/js/**").addResourceLocations("/js/");

    }

    // 文件上传设置

    @Bean

    public MultipartResolver multipartResolver() {

        CommonsMultipartResolver multipartResolver = new CommonsMultipartResolver();

        multipartResolver.setMaxUploadSize(1000000);

        return multipartResolver;

    }

    // 在此---配置ContentNegotiationManager,在无后缀名情况下默认为jsp view resolver

    @Override

    public void configureContentNegotiation(

            ContentNegotiationConfigurer configurer) {

        configurer.ignoreAcceptHeader(true).defaultContentType(

                MediaType.TEXT_HTML);

    }

    // 在此---配置ContentNegotiatingViewResolver,通过此代理到不同的viewResolover

    @Bean

    public ViewResolver contentNegotiatingViewResolver(

            ContentNegotiationManager manager) {

        ContentNegotiatingViewResolver resolver = new ContentNegotiatingViewResolver();

        resolver.setContentNegotiationManager(manager);

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

        resolvers.add(xmlViewResolver());

        resolvers.add(jsonViewResolver());

        resolvers.add(viewResolver());// jsp view resolver

        resolvers.add(pdfViewResolver());

        resolvers.add(xlsViewResolver());

        resolver.setViewResolvers(resolvers);

        return resolver;

    }

    //在此---xml viewResolver

    @Bean

    public ViewResolver xmlViewResolver() {

        return new XmlViewResolver();

    }

    //在此---json viewResolver

    @Bean

    public ViewResolver jsonViewResolver() {

        return new JsonViewResolver();

    }

    //在此---pdf viewResolver

    @Bean

    public ViewResolver pdfViewResolver() {

        return new PdfViewResolver();

    }

    //在此---excel viewResolver

    @Bean

    ViewResolver xlsViewResolver() {

        return new XlsViewResolver();

    }

}

7.2.4 演示控制器

package com.wisely.web;

import org.springframework.stereotype.Controller;

import org.springframework.ui.Model;

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

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

import com.wisely.domain.DemoObj;

@Controller

public class ContentController {

    @RequestMapping(value = "/getdemo",method = RequestMethod.GET)

    public String getDemo(Model model){

        DemoObj demoObj = new DemoObj(333l, "WYF");

        model.addAttribute("demoObj",demoObj);

        return "demoObj";

    }

}

7.2.5 结果

7.2.5.1 jsp

7.2.5.2 json

7.2.5.3 pdf

7.2.5.4 xml

7.2.5.5 xls

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07点睛Spring MVC4.1-ContentNegotiatingViewResolver

7.1 ContentNegotiatingViewResolver

7.2 示例

7.2.1 添加依赖

7.2.2 定制view和viewResolve

7.2.2.1 pdf

7.2.2.1.1 view

7.2.2.1.2 viewResolver

7.2.2.2 xls

7.2.2.2.1 view

7.2.2.2.2 viewResolver

7.2.2.3 json

7.2.2.3.1 view

7.2.2.3.2 viewResolver

7.2.2.4 xml

7.2.2.4.1 DemoBean的额外配置

7.2.2.4.2 view

7.2.2.4.3 viewResolver

7.2.2.5 jsp

7.2.2.5.1 view

7.2.2.5.2 viewResolver

7.2.3 配置resolver

7.2.4 演示控制器

7.2.5 结果

7.2.5.1 jsp

7.2.5.2 json

7.2.5.3 pdf

7.2.5.4 xml

7.2.5.5 xls

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