SSM实战DMEO

女爷i 2022-10-01 00:52 139阅读 0赞

[源码地址][Link 1]

# 乱码解决 #

*  post乱码  
    web.xml

<filter>
                <filter-name>CharacterEncodingFilter</filter-name>
                <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
                <init-param>
                    <param-name>encoding</param-name>
                    <param-value>utf-8</param-value>
                </init-param>
            </filter>
            <filter-mapping>
                <filter-name>CharacterEncodingFilter</filter-name>
                <url-pattern>/*</url-pattern>
            </filter-mapping>

*  get乱码  
    方式一：设置mysql 编码为utf-8 （一劳永逸）  
    方式二：手动解码再编码

String string=new String(result.getBytes("iso8859-1"),"utf-8");

*  response乱码  
    方式一：推荐  
    springmvc.xml 头文件一定要是4.0及以上才可以

<mvc:annotation-driven >
            
            <mvc:message-converters register-defaults="true">
                
                <bean class="org.springframework.http.converter.StringHttpMessageConverter">
                    <property name="supportedMediaTypes" value="text/html;charset=UTF-8"/>
                </bean>
            </mvc:message-converters>
        </mvc:annotation-driven>

方式二：自己指定相应格式

@RequestMapping(value = "/test",produces = "text/html;charset=utf-8")
        @ResponseBody
        public   String test()
        {
            return "测试中文乱码";
        }

# mybatis相关 #

# maven mybatis自动生成插件 #

pom.xml

<plugin>
                    <groupId>org.mybatis.generator</groupId>
                    <artifactId>mybatis-generator-maven-plugin</artifactId>
                    <version>1.3.2</version>
                    <configuration>
                        <verbose>true</verbose>
                        <overwrite>true</overwrite>
                    </configuration>
                </plugin>

generatorConfig.xml 放到根目录  
设置驱动位置 数据库 用户名 密码 需要生成的表

<?xml version="1.0" encoding="UTF-8"?>
    <!DOCTYPE generatorConfiguration PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN" "http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd">
    
    <generatorConfiguration>
        
        <classPathEntry location="C:\Users\Administrator\.m2\repository\mysql\mysql-connector-java\5.1.32\mysql-connector-java-5.1.32.jar"/>
        <context id="testTables" targetRuntime="MyBatis3">
            <commentGenerator>
                
                <property name="suppressAllComments" value="true"/>
            </commentGenerator>
            
            <jdbcConnection driverClass="com.mysql.jdbc.Driver" connectionURL="jdbc:mysql://localhost:3306/demo" userId="root" password="root">
            </jdbcConnection>
            
            <javaTypeResolver>
                <property name="forceBigDecimals" value="false"/>
            </javaTypeResolver>
    
            
            <javaModelGenerator targetPackage="cn.zsp.ssm.pojo" targetProject="./src">
                
                <property name="enableSubPackages" value="false"/>
                
                <property name="trimStrings" value="true"/>
            </javaModelGenerator>
            
            <sqlMapGenerator targetPackage="cn.zsp.ssm.mapper" targetProject="./src">
                
                <property name="enableSubPackages" value="false"/>
            </sqlMapGenerator>
            
            <javaClientGenerator type="XMLMAPPER" targetPackage="cn.zsp.ssm.mapper" targetProject="./src">
                
                <property name="enableSubPackages" value="false"/>
            </javaClientGenerator>
            
            <table schema="" tableName="user"></table>
    
        </context>
    </generatorConfiguration>

运行：

> mybatis-generator:generate -e 运行

# 分页插件 #

[pageHelper][]  
基本使用

@Service
    public class UserServiceImpl implements UserService { 
        @Autowired
        TbUserMapper userMapper;
        @Override
        public PageResult list(int page, int rows) {
            //设置当前页 和行数
            PageHelper.startPage(page,rows);
            List<TbUser> tbUsers = userMapper.selectByExample(new TbUserExample());
            //从pageinfo中取结果
            PageInfo<TbUser> pageInfo=new PageInfo<TbUser>(tbUsers);
           return  PageResult.buid(page,pageInfo.getList(),pageInfo.getPages());
        }
    }

# 模板引擎 #

# 使用freemarker代替jsp #

1.添加依赖

<dependency>
                <groupId>org.freemarker</groupId>
                <artifactId>freemarker</artifactId>
                <version>${freemarker.version}</version>
            </dependency>

2.springmvc.xml 相关配置 取消jsp的视图 并添加如下内容

<bean id="freemarkerConfig" class="org.springframework.web.servlet.view.freemarker.FreeMarkerConfigurer">
            <property name="templateLoaderPath" value="/WEB-INF/ftl/"/>
            <property name="defaultEncoding" value="utf-8"/>
            <property name="freemarkerSettings">
                <props>
                    <prop key="template_update_delay">10</prop>
                    <prop key="locale">zh_CN</prop>
                    <prop key="datetime_format">yyyy-MM-dd</prop>
                    <prop key="date_format">yyyy-MM-dd</prop>
                    <prop key="number_format">#.##</prop>
                </props>
            </property>
        </bean>
    
        
        <bean class="org.springframework.web.servlet.view.freemarker.FreeMarkerViewResolver">
            <property name="cache" value="true"/>
            <property name="prefix" value=""/>
            <property name="suffix" value=".ftl"/>
            <property name="contentType" value="text/html;charset=UTF-8"/>
            <property name="viewClass" value="org.springframework.web.servlet.view.freemarker.FreeMarkerView"/>
            <property name="allowSessionOverride" value="true"/>
            <property name="allowRequestOverride" value="true"/>
            <property name="exposeSpringMacroHelpers" value="false"/>
            <property name="exposeRequestAttributes" value="true"/>
            <property name="exposeSessionAttributes" value="true"/>
            <property name="requestContextAttribute" value="request"/>
        </bean>

[Link 1]: https://github.com/geekzsp/JavaDemo/tree/master/SSM
[pageHelper]: https://github.com/pagehelper/Mybatis-PageHelper