更新一個春天啓動項目:構建使用Maven
感謝所有爲你的答案。我仍然有問題,因爲它沒有返回我希望的結果。這是文件放置的問題嗎?他們是這樣組織的:i63.tinypic.com/2by8g2.png
再次提前致謝。
我爲了創建使用Spring引導和JDBC(無JPA)的Web應用研究;我遇到了幾個問題。 我不明白如何正確地創建控制器,以及如何使它返回我想要的.jsp頁面。 我搜索了很多很多的解決方案,但找不到合適的解決方案。 這是我的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>
<groupId>---myprojectname</groupId>
<artifactId>tesieasy</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<name>tesieasy</name>
<description>Demo project for Spring Boot</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.4.1.RELEASE</version>
<relativePath /> <!-- lookup parent from repository -->
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.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>com.h2database</groupId>
<artifactId>h2</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
我application.properties:
> spring.h2.console.enabled=true
server.port=8000
spring.view.prefix=/WEB-INF/jsp/
spring.view.suffix=.jsp
我ServetInizializer:
我的實體:
import java.util.Date;
import java.text.SimpleDateFormat;
public class Journal {
private Long id;
private String title;
private Date created;
private String summary;
private SimpleDateFormat format = new SimpleDateFormat("MM/dd/yyyy");
/** costruttori**/
public Journal() {}
public Journal(Long id, String title, String summary, Date date){
this.id = id;
this.title = title;
this.summary = summary;
this.created = date;
}
/** getters and setters omitted **/
我的服務:
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.stereotype.Service;
import name of my package-.entity.Journal;
@Service
public class JournalService {
private static final Logger log = LoggerFactory.getLogger(JournalService.class);
@Autowired
JdbcTemplate jdbcTemplate;
public void insertData() {
log.info("> Table creation");
jdbcTemplate.execute("DROP TABLE JOURNAL IF EXISTS");
jdbcTemplate
.execute("-cut for brevity-");
log.info("> Done.");
}
public List<Journal> findAll() {
List<Journal> entries = new ArrayList<>();
jdbcTemplate
.query("SELECT * FROM JOURNAL",
new Object[] {}, (rs, row) -> new Journal(rs.getLong("id"), rs.getString("title"),
rs.getString("summary"), new Date(rs.getTimestamp("created").getTime())))
.forEach(entry -> entries.add(entry));
return entries;
}
public int countEntries() {
int rowCount = this.jdbcTemplate.queryForObject("SELECT count(*) FROM JOURNAL", Integer.class);
return rowCount;
}
public Journal insertJournal() {
Journal journal = null;
this.jdbcTemplate.update(
-cut for brevity-");
return journal;
}
}
我的一個.jsp頁面:
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>A title</title></head>
<body>
Hello! JSP is working fine!
</body>
</html>
最後我的控制器:
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import *my package name.entity.Journal;
import *my package name.service.JournalService;
@RestController
public class HelloController {
@Autowired
private JournalService journalService;
@RequestMapping(value="/")
public String home() {
return "home";
}
@RequestMapping("/greeting")
public String greeting() {
return "greeting";
}
@RequestMapping("/findAll")
public String index() {
List<Journal> all;
all = journalService.findAll();
return all.toString();
}
@RequestMapping("/count")
public int countElements() {
int count;
count = journalService.countEntries();
return count;
}
@RequestMapping("/insert")
public Journal insertElements() {
Journal insert;
insert = journalService.insertJournal();
return insert;
}
}
我明白了什麼:
- 我並不需要一個Web .xml文件
- 如何連接t他與控制器業務(即使我的findAll方法返回我的數據爲{},我必須瞭解如何將它正確地寫)
我不明白:
- 爲什麼它的沒有正確鏈接到我的JSP頁面 - 我需要什麼?
- 我需要模型和視圖嗎?
我希望你能給我一些建議和/或一些適用於我的範圍的例子。 在此先感謝和問候!
@RestController不應該被用來返回圖。雖然可能有辦法使用它返回視圖,但從根本上說它是不正確的。 – Kamal