SPRING IN ACTION 第4版笔记-第五章BUILDING SPRING WEB APPLICATIONS-003-示例项目用到的类及配置文件

一、配置文件

1.由于它继承AbstractAnnotationConfigDispatcherServletInitializer，Servlet容器会把它当做配置文件

 package spittr.config;

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

 import spittr.web.WebConfig;

 public class SpitterWebInitializer extends AbstractAnnotationConfigDispatcherServletInitializer {

   @Override
   protected Class<?>[] getRootConfigClasses() {
     return new Class<?>[] { RootConfig.class };
   }

   @Override
   protected Class<?>[] getServletConfigClasses() {
     //Specify configuration class
     return new Class<?>[] { WebConfig.class };
   }

   @Override
   protected String[] getServletMappings() {
     //Map DispatcherServlet to "/"
     return new String[] { "/" };
   }

 }

2.替代以前的web.xml

 package spittr.web;

 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.ComponentScan;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.web.servlet.ViewResolver;
 import org.springframework.web.servlet.config.annotation.DefaultServletHandlerConfigurer;
 import org.springframework.web.servlet.config.annotation.EnableWebMvc;
 import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
 import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
 import org.springframework.web.servlet.view.InternalResourceViewResolver;

 @Configuration
 @EnableWebMvc
 @ComponentScan("spittr.web")
 public class WebConfig extends WebMvcConfigurerAdapter {

   @Bean
   public ViewResolver viewResolver() {
     InternalResourceViewResolver resolver = new InternalResourceViewResolver();
     resolver.setPrefix("/WEB-INF/views/");
     resolver.setSuffix(".jsp");
     return resolver;
   }

   @Override
   public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {
     //Configure static content handling
     configurer.enable();
     //configurer.enable();是you’re asking  DispatcherServlet to forward
     //requests for static resources to the servlet container’s default servlet and not to try to
     //handle them itself.
   }

   @Override
   public void addResourceHandlers(ResourceHandlerRegistry registry) {
     // TODO Auto-generated method stub
     super.addResourceHandlers(registry);
   }

 }

3.

 package spittr.config;

 import java.util.regex.Pattern;

 import org.springframework.context.annotation.ComponentScan;
 import org.springframework.context.annotation.ComponentScan.Filter;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.context.annotation.FilterType;
 import org.springframework.context.annotation.Import;
 import org.springframework.core.type.filter.RegexPatternTypeFilter;

 import spittr.config.RootConfig.WebPackage;

 @Configuration
 @Import(DataConfig.class)
 @ComponentScan(basePackages={"spittr"},
     excludeFilters={
         @Filter(type=FilterType.CUSTOM, value=WebPackage.class)
     })
 public class RootConfig {
   public static class WebPackage extends RegexPatternTypeFilter {
     public WebPackage() {
       super(Pattern.compile("spittr\\.web"));
     }
   }
 }

4.数据源

 package spittr.config;

 import javax.sql.DataSource;

 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.context.annotation.ImportResource;
 import org.springframework.jdbc.core.JdbcOperations;
 import org.springframework.jdbc.core.JdbcTemplate;
 import org.springframework.jdbc.datasource.embedded.EmbeddedDatabaseBuilder;
 import org.springframework.jdbc.datasource.embedded.EmbeddedDatabaseType;

 @Configuration
 //@ImportResource("classpath:applicationContext.xml")
 public class DataConfig {

   @Bean
   public DataSource dataSource() {
     return new EmbeddedDatabaseBuilder()
             .setType(EmbeddedDatabaseType.H2)
             .addScript("schema.sql")
             .build();
   }

   @Bean
   public JdbcOperations jdbcTemplate(DataSource dataSource) {
     return new JdbcTemplate(dataSource);
   }

 }

二、dao

1.

package spittr.data;

import java.util.List;

import spittr.Spittle;

public interface SpittleRepository {

  List<Spittle> findRecentSpittles();

  List<Spittle> findSpittles(long max, int count);

  Spittle findOne(long id);

  void save(Spittle spittle);

}

2.

 package spittr.data;

 import spittr.Spitter;

 public interface SpitterRepository {

   Spitter save(Spitter spitter);

   Spitter findByUsername(String username);

 }

3.

 package spittr.data;

 import java.sql.ResultSet;
 import java.sql.SQLException;
 import java.util.List;

 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.jdbc.core.JdbcOperations;
 import org.springframework.jdbc.core.RowMapper;
 import org.springframework.stereotype.Repository;

 import spittr.Spittle;

 @Repository
 public class JdbcSpittleRepository implements SpittleRepository {

   private JdbcOperations jdbc;

   @Autowired
   public JdbcSpittleRepository(JdbcOperations jdbc) {
     this.jdbc = jdbc;
   }

   public List<Spittle> findRecentSpittles() {
     return jdbc.query(
         "select id, message, created_at, latitude, longitude" +
         " from Spittle" +
         " order by created_at desc limit 20",
         new SpittleRowMapper());
   }

   public List<Spittle> findSpittles(long max, int count) {
     return jdbc.query(
         "select id, message, created_at, latitude, longitude" +
         " from Spittle" +
         " where id < ?" +
         " order by created_at desc limit 20",
         new SpittleRowMapper(), max);
   }

   public Spittle findOne(long id) {
     return jdbc.queryForObject(
         "select id, message, created_at, latitude, longitude" +
         " from Spittle" +
         " where id = ?",
         new SpittleRowMapper(), id);
   }

   public void save(Spittle spittle) {
     jdbc.update(
         "insert into Spittle (message, created_at, latitude, longitude)" +
         " values (?, ?, ?, ?)",
         spittle.getMessage(),
         spittle.getTime(),
         spittle.getLatitude(),
         spittle.getLongitude());
   }

   private static class SpittleRowMapper implements RowMapper<Spittle> {
     public Spittle mapRow(ResultSet rs, int rowNum) throws SQLException {
       return new Spittle(
           rs.getLong("id"),
           rs.getString("message"),
           rs.getDate("created_at"),
           rs.getDouble("longitude"),
           rs.getDouble("latitude"));
     }
   }

 }

4.

 package spittr.data;

 import java.sql.ResultSet;
 import java.sql.SQLException;

 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.jdbc.core.JdbcOperations;
 import org.springframework.jdbc.core.RowMapper;
 import org.springframework.stereotype.Repository;

 import spittr.Spitter;

 @Repository
 public class JdbcSpitterRepository implements SpitterRepository {

   private JdbcOperations jdbc;

   @Autowired
   public JdbcSpitterRepository(JdbcOperations jdbc) {
     this.jdbc = jdbc;
   }

   public Spitter save(Spitter spitter) {
     jdbc.update(
         "insert into Spitter (username, password, first_name, last_name, email)" +
         " values (?, ?, ?, ?, ?)",
         spitter.getUsername(),
         spitter.getPassword(),
         spitter.getFirstName(),
         spitter.getLastName(),
         spitter.getEmail());
     return spitter; // TODO: Determine value for id
   }

   public Spitter findByUsername(String username) {
     return jdbc.queryForObject(
         "select id, username, null, first_name, last_name, email from Spitter where username=?",
         new SpitterRowMapper(),
         username);
   }

   private static class SpitterRowMapper implements RowMapper<Spitter> {
     public Spitter mapRow(ResultSet rs, int rowNum) throws SQLException {
       return new Spitter(
           rs.getLong("id"),
           rs.getString("username"),
           null,
           rs.getString("first_name"),
           rs.getString("last_name"),
           rs.getString("email"));
     }
   }

 }

5.

create table Spittle (
    id identity,
    message varchar(140) not null,
    created_at timestamp not null,
    latitude double,
    longitude double
);

create table Spitter (
    id identity,
    username varchar(20) unique not null,
    password varchar(20) not null,
    first_name varchar(30) not null,
    last_name varchar(30) not null,
    email varchar(30) not null
);

6.log4j.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE log4j:configuration PUBLIC "-//APACHE//DTD LOG4J 1.2//EN" "log4j.dtd">
<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/">

    <!-- Appenders -->
    <appender name="console" class="org.apache.log4j.ConsoleAppender">
        <param name="Target" value="System.out" />
        <layout class="org.apache.log4j.PatternLayout">
            <param name="ConversionPattern" value="%-5p: %c - %m%n" />
        </layout>
    </appender>

    <!-- Application Loggers -->
    <logger name="spittr">
        <level value="info" />
    </logger>

    <!-- 3rdparty Loggers -->
    <logger name="org.springframework.core">
        <level value="info" />
    </logger>

    <logger name="org.springframework.beans">
        <level value="info" />
    </logger>

    <logger name="org.springframework.context">
        <level value="info" />
    </logger>

    <logger name="org.springframework.web">
        <level value="info" />
    </logger>

    <!-- Root Logger -->
    <root>
        <priority value="warn" />
        <appender-ref ref="console" />
    </root>

</log4j:configuration>

三、实体类

1.

 package spittr;

 import java.util.Date;

 import org.apache.commons.lang3.builder.EqualsBuilder;
 import org.apache.commons.lang3.builder.HashCodeBuilder;

 public class Spittle {

   private final Long id;
   private final String message;
   private final Date time;
   private Double latitude;
   private Double longitude;

   public Spittle(String message, Date time) {
     this(null, message, time, null, null);
   }

   public Spittle(Long id, String message, Date time, Double longitude, Double latitude) {
     this.id = id;
     this.message = message;
     this.time = time;
     this.longitude = longitude;
     this.latitude = latitude;
   }

   public long getId() {
     return id;
   }

   public String getMessage() {
     return message;
   }

   public Date getTime() {
     return time;
   }

   public Double getLongitude() {
     return longitude;
   }

   public Double getLatitude() {
     return latitude;
   }

   @Override
   public boolean equals(Object that) {
     return EqualsBuilder.reflectionEquals(this, that, "id", "time");
   }

   @Override
   public int hashCode() {
     return HashCodeBuilder.reflectionHashCode(this, "id", "time");
   }

 }

2.

 package spittr;

 import javax.validation.constraints.NotNull;
 import javax.validation.constraints.Size;

 import org.apache.commons.lang3.builder.EqualsBuilder;
 import org.apache.commons.lang3.builder.HashCodeBuilder;
 import org.hibernate.validator.constraints.Email;

 public class Spitter {

   private Long id;

   @NotNull
   @Size(min=5, max=16)
   private String username;

   @NotNull
   @Size(min=5, max=25)
   private String password;

   @NotNull
   @Size(min=2, max=30)
   private String firstName;

   @NotNull
   @Size(min=2, max=30)
   private String lastName;

   @NotNull
   @Email
   private String email;

   public Spitter() {}

   public Spitter(String username, String password, String firstName, String lastName, String email) {
     this(null, username, password, firstName, lastName, email);
   }

   public Spitter(Long id, String username, String password, String firstName, String lastName, String email) {
     this.id = id;
     this.username = username;
     this.password = password;
     this.firstName = firstName;
     this.lastName = lastName;
     this.email = email;
   }

   public String getUsername() {
     return username;
   }

   public void setUsername(String username) {
     this.username = username;
   }

   public String getPassword() {
     return password;
   }

   public void setPassword(String password) {
     this.password = password;
   }

   public Long getId() {
     return id;
   }

   public void setId(Long id) {
     this.id = id;
   }

   public String getFirstName() {
     return firstName;
   }

   public void setFirstName(String firstName) {
     this.firstName = firstName;
   }

   public String getLastName() {
     return lastName;
   }

   public void setLastName(String lastName) {
     this.lastName = lastName;
   }

   public String getEmail() {
     return email;
   }

   public void setEmail(String email) {
     this.email = email;
   }

   @Override
   public boolean equals(Object that) {
     return EqualsBuilder.reflectionEquals(this, that, "firstName", "lastName", "username", "password", "email");
   }

   @Override
   public int hashCode() {
     return HashCodeBuilder.reflectionHashCode(this, "firstName", "lastName", "username", "password", "email");
   }

 }

四、