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、