本文节选自《Netkiller Java 手札》 地址 http://www.netkiller.cn/java/spring/
下面是日志中常见的异常与解决方法。
解决方法,加入下面代码到 dispatcher-servlet.xml 文件中
<mvc:annotation-driven />
dispatcher-servlet.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:context="http://www.springframework.org/schema/context"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd">
<context:component-scan base-package="cn.netkiller.controller" />
<mvc:annotation-driven />
<bean id="viewResolver"
class="org.springframework.web.servlet.view.UrlBasedViewResolver">
<property name="viewClass"
value="org.springframework.web.servlet.view.JstlView" />
<property name="prefix" value="/WEB-INF/jsp/" />
<property name="suffix" value=".jsp" />
</bean>
</beans>
pom.xml 文件中加入依赖包
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<bean
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="viewClass"
value="org.springframework.web.servlet.view.JstlView" />
<property name="prefix" value="/WEB-INF/jsp/" />
<!-- <property name="suffix" value=".jsp" /> -->
<property name="viewNames" value="*.jsp" />
</bean>
<bean id="templateResolver"
class="org.thymeleaf.templateresolver.ServletContextTemplateResolver">
<property name="prefix" value="/WEB-INF/templates/" />
<!-- <property name="suffix" value=".html" /> -->
<property name="templateMode" value="HTML5" />
</bean>
<bean id="templateEngine" class="org.thymeleaf.spring4.SpringTemplateEngine">
<property name="templateResolver" ref="templateResolver" />
</bean>
<bean class="org.thymeleaf.spring4.view.ThymeleafViewResolver">
<property name="templateEngine" ref="templateEngine" />
<property name="viewNames" value="*.html" />
</bean>
@RequestMapping("/thymeleaf")
public String thymeleafView(){
return "thymeleaf.html";
}
@RequestMapping("/jsp")
public String jspView(){
return "jstl.jsp";
}
<property name="viewNames" value="*thymeleaf/*" />
@RequestMapping(value="/test")
public ModelAndView dboxPrint(Model model){
ModelAndView modelAndView = new ModelAndView("thymeleaf/test");
return modelAndView;
}
方法一,排除静态内容如 images, css, js 等等
<servlet>
<servlet-name>springframework</servlet-name>
<servlet-class>
org.springframework.web.servlet.DispatcherServlet
</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>default</servlet-name>
<url-pattern>/images/*</url-pattern>
<url-pattern>*.css</url-pattern>
<url-pattern>/js/*.js</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>springframework</servlet-name>
<url-pattern>/welcome.jsp</url-pattern>
<url-pattern>/welcome.html</url-pattern>
<url-pattern>*.html</url-pattern>
</servlet-mapping>
方法二
<mvc:resources location="/images/" mapping="/images/**" />
<mvc:resources location="/css/" mapping="/css/**" />
<mvc:resources location="/js/" mapping="/js/**" />
配置 url-pattern 增加需要传递给Spring的扩展名
<servlet>
<servlet-name>springframework</servlet-name>
<servlet-class>
org.springframework.web.servlet.DispatcherServlet
</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>springframework</servlet-name>
<url-pattern>/welcome.jsp</url-pattern>
<url-pattern>/welcome.html</url-pattern>
<url-pattern>*.json</url-pattern>
<url-pattern>*.xml</url-pattern>
<url-pattern>*.html</url-pattern>
</servlet-mapping>
@GeneratedValue(strategy=GenerationType.IDENTITY)
换成
@GeneratedValue(strategy=GenerationType.AUTO)
or
@Id
@Column(name = "ID")
@GeneratedValue(strategy=GenerationType.SEQUENCE, generator = "id_Sequence")
@SequenceGenerator(name = "id_Sequence", sequenceName = "ID_SEQ")
private int id;
在实体中使用
import javax.persistence.Id;
替换
import org.springframework.data.annotation.Id;
Spring 默认不支持 UTF-8
2016-08-17 16:04:53.148 WARN 7700 --- [nio-8080-exec-1] .w.s.m.s.DefaultHandlerExceptionResolver : Failed to read HTTP message: org.springframework.http.converter.HttpMessageNotReadableException: Could not read document: Invalid UTF-8 middle byte 0xd0
at [Source: java.io.PushbackInputStream@33aa54cc; line: 1, column: 38] (through reference chain: api.domain.oracle.Withdraw["bankname"]); nested exception is com.fasterxml.jackson.databind.JsonMappingException: Invalid UTF-8 middle byte 0xd0
at [Source: java.io.PushbackInputStream@33aa54cc; line: 1, column: 38] (through reference chain: api.domain.oracle.Withdraw["bankname"])
解决方案 application.properties 配置文件中加入如下配置:
spring.messages.encoding=UTF-8
server.tomcat.uri-encoding=UTF-8
spring.http.encoding.charset=UTF-8
spring.http.encoding.enabled=true
spring.http.encoding.force=true