springboot2.0整合同时支持jsp+html跳转的方法介绍（附代码）

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说明一下 。整合会遇到的问题，

1、pom.xml文件同时放入thymeleaf 架包和jsp支持后， springboot的return模版会默认跳转到html ，

那怕是你并没有配置thymeleaf的属性

解决方案， 使用getRequestDispatcher方法来跳转到jsp页面， 就同时支持html和jsp了

request.getRequestDispatcher("/WEB-INF/views/testJsp.jsp").forward(request, response);

2、另外 使用getRequestDispatcher跳转到html页面的时候，thymeleaf 模版接收参数可能会出现问题。

解决方案1：html放弃使用thymeleaf 模版，然后在页面主动请求接口数据(AJAX POST等)

解决方案2：html继续使用thymeleaf 模版，用return模版 返回来跳转页面

代码  UserController.java

package com.example.demo.controller;  import com.example.demo.service.UserService; import org.slf4j.Logger; import org.slf4j.LoggerFactory; 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 org.springframework.web.bind.annotation.RequestParam; import org.springframework.web.bind.annotation.ResponseBody;  import javax.annotation.Resource; import javax.servlet.ServletException; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import java.io.IOException; import java.util.HashMap; import java.util.List; import java.util.Map;  /**  * @author chenlin  */ @Controller @RequestMapping("/usersDemo") public class UserController {     private static Logger log = LoggerFactory.getLogger(UserController.class);     @Resource     UserService userService;      @ResponseBody     @RequestMapping(value = "/test", produces = "application/json;charset=UTF-8", method = {RequestMethod.POST, RequestMethod.GET})     public List<Map<String, Object>> test(){         log.info("进入了test方法！");         List<Map<String,Object>> list=userService.userQueryAll();         return list;     }     @RequestMapping(value = "/testHtml", produces = "application/json;charset=UTF-8", method = {RequestMethod.POST, RequestMethod.GET})     public String testHtml(HttpServletRequest request, HttpServletResponse response){         List<Map<String,Object>> list=userService.userQueryAll();         request.setAttribute("list",list);         log.info("进入了testHtml方法！");         return "views/testHtml";     }     @RequestMapping(value = "/testJsp", produces = "application/json;charset=UTF-8", method = {RequestMethod.POST, RequestMethod.GET})     public void testJsp( HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {         List<Map<String,Object>> list=userService.userQueryAll();         request.setAttribute("list",list);         log.info("进入了testJsp方法！");         request.getRequestDispatcher("/WEB-INF/views/testJsp.jsp").forward(request, response);     } }

配置文件

server:   port: 8080   tomcat:     uri-encoding: UTF-8   servlet:     context-path: / spring:   dataSource:     type: com.alibaba.druid.pool.DruidDataSource     url: jdbc:mysql://localhost:3306/db-test?useUnicode=true&characterEncoding=utf8&tinyInt1isBit=false&usessl=false     username: root     password: 123456     driverClassName: com.mysql.jdbc.Driver   mvc:     view: #新版本 1.3后可以使用       suffix: .jsp       prefix: /WEB-INF/   view: #老版本 1.4后被抛弃     suffix: .jsp     prefix: /WEB-INF/   thymeleaf:     #清除缓存     cache: false     mode: LEGACYHTML5 #非严格模式     prefix: /WEB-INF/ #默认 classpath:/templates/     suffix: .html     servlet:       content-type: text/html mybatis:   mapper-locations: classpath:com/example/demo/mapper/*Mapper.xml #注意：一定要对应mapper映射xml文件的所在路径   type-aliases-package: com.example.demo.model # 注意：对应实体类的路径   configuration:     call-setters-on-nulls: true # 解决使用map类型接收查询结果的时候为null的字段会没有的情况

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>     <parent>         <groupId>org.springframework.boot</groupId>         <artifactId>spring-boot-starter-parent</artifactId>         <version>2.0.8.RELEASE</version>         <relativePath/> <!-- lookup parent from repository -->     </parent>     <groupId>com.example</groupId>     <artifactId>demo</artifactId>     <version>0.0.1-SNAPSHOT</version>     <name>demo</name>     <description>Demo project for Spring Boot</description>      <properties>         <java.version>1.8</java.version>         <mysql.version>5.1.47</mysql.version>     </properties>      <dependencies>         <dependency>             <groupId>org.springframework.boot</groupId>             <artifactId>spring-boot-starter-jdbc</artifactId>         </dependency>         <dependency>             <groupId>org.springframework.boot</groupId>             <artifactId>spring-boot-starter-web</artifactId>         </dependency>         <dependency>             <groupId>org.mybatis.spring.boot</groupId>             <artifactId>mybatis-spring-boot-starter</artifactId>             <version>2.0.0</version>         </dependency>         <dependency>             <groupId>org.springframework.boot</groupId>             <artifactId>spring-boot-starter-test</artifactId>             <scope>test</scope>         </dependency>         <!-- alibaba的druid数据库连接池监控依赖 -->         <dependency>             <groupId>com.alibaba</groupId>             <artifactId>druid-spring-boot-starter</artifactId>             <version>1.1.13</version>         </dependency>         <dependency>             <groupId>mysql</groupId>             <artifactId>mysql-connector-java</artifactId>             <version>${mysql.version}</version>         </dependency>         <!--thymeleaf模版-->         <dependency>             <groupId>org.springframework.boot</groupId>             <artifactId>spring-boot-starter-thymeleaf</artifactId>         </dependency>         <!--非严格模式下 规避一些html编译错误 -->         <dependency>             <groupId>net.sourceforge.nekohtml</groupId>             <artifactId>nekohtml</artifactId>             <version>1.9.22</version>         </dependency>         <!--tomcat支持-->         <dependency>             <groupId>org.springframework.boot</groupId>             <artifactId>spring-boot-starter-tomcat</artifactId>             <scope>provided</scope>         </dependency>         <dependency>             <groupId>org.apache.tomcat.embed</groupId>             <artifactId>tomcat-embed-jasper</artifactId>             <scope>provided</scope>         </dependency>         <!--servlet依赖.-->         <dependency>             <groupId>javax.servlet</groupId>             <artifactId>javax.servlet-api</artifactId>             <version>4.0.1</version>             <scope>provided</scope>         </dependency>         <!--jsp标签库-->         <dependency>             <groupId>javax.servlet</groupId>             <artifactId>jstl</artifactId>         </dependency>     </dependencies>      <build>         <resources>             <!--解决mybatis文件不编译问题-->             <resource>                 <directory>src/main/java</directory>                 <includes>                     <include>**/*.xml</include>                 </includes>                 <filtering>false</filtering>             </resource>             <resource>                 <!--解决实体类启动和jar启动web页面会报404的错误-->                 <directory>src/main/webapp</directory>                 <targetPath>META-INF/resources</targetPath>                 <includes>                     <include>**/**</include>                 </includes>             </resource>         </resources>     </build> </project>

以上就完了。

另外附加一个return 模版的java代码配置， 可以配置return模版的优先级，后面的文件格式，当然只能用getRequestDispatcher来跳转了

在启动类中添加，另外，配置文件参数和代码可重复 但是代码优先于配置文件。

/**  * 添加对jsp支持  *   */ @Bean public ViewResolver getJspViewResolver() {     InternalResourceViewResolver internalResourceViewResolver = new InternalResourceViewResolver();     internalResourceViewResolver.setPrefix("/WEB-INF/");//前缀     internalResourceViewResolver.setSuffix(".jsp");//后缀     internalResourceViewResolver.setOrder(0);//优先级     return internalResourceViewResolver; }  /**  * 添加对Freemarker支持  *  */ @Bean public FreeMarkerViewResolver getFreeMarkerViewResolver() {     FreeMarkerViewResolver freeMarkerViewResolver = new FreeMarkerViewResolver();     freeMarkerViewResolver.setCache(false);     freeMarkerViewResolver.setPrefix("/WEB-INF/");//前缀     freeMarkerViewResolver.setSuffix(".html");//后缀     freeMarkerViewResolver.setRequestContextAttribute("request");     freeMarkerViewResolver.setOrder(1);//优先级     freeMarkerViewResolver.setContentType("text/html;charset=UTF-8");     return freeMarkerViewResolver;  }

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