1. 使用宏包

\usepackage{overpic}

2. 使用方法

\usepackage{overpic}
\begin{overpic}[scale=0.35 or width=1\textwidth=1]{图片名称}
\put{[坐标]}{[插入内容]}
\end{overpic}

3. 示例

\begin{figure}[!h]
  \centering
  \includegraphics[width=1\textwidth]{FC.png}
\end{figure}

\begin{overpic}[width=1\textwidth]{FC.png}

    \put(12,45){\small\bfseries\color{blue}{$x_0^0$}}
    
    \put(15.5,44.8){\small\bfseries$+1$}

    \put(12,38){\small\bfseries \color{blue}{$x_1^0$}}

    \put(12,31){\small\bfseries \color{blue}{$x_2^0$}}
        
    \put(12,24){\small\bfseries \color{blue}{$x_3^0$}}
    
    \put(50,58){\small\bfseries \color{red}{$a_0^1$}}
    
    \put(48,55.5){\small\bfseries $+1$}
    
    \put(47,51){\small\bfseries \color{red}{$x_1^1|a_1^1$}}
    
    \put(47,44){\small\bfseries \color{red}{$x_2^1|a_2^1$}}
    
    \put(47,37){\small\bfseries \color{red}{$x_3^1|a_3^1$}}
    
    \put(47,30){\small\bfseries \color{red}{$x_4^1|a_4^1$}}
    
    \put(47,23){\small\bfseries \color{red}{$x_5^1|a_2^1$}}
    
    \put(47,16){\small\bfseries \color{red}{$x_6^1|a_2^1$}}
    
    \put(84,41){\small\bfseries $x_1^2|a_1^2$}
    
    \put(84,34){\small\bfseries $x_2^2|a_2^2$}
    
    \put(84,27){\small\bfseries $x_3^2|a_3^2$}
    
    \put(30, 47){\small\bfseries \color{green}{$w_{10}^1$}}
    
    \put(33, 44){\small\bfseries \color{green}{$w_{11}^1$}}
    
    \put(37, 43){\small\bfseries \color{green}{$w_{21}^1$}}
    
    \put(41, 43){\small\bfseries \color{green}{$w_{31}^1$}}
    

\end{overpic}

此文是本人2018年写的一个小功能

后来不玩csdn了 很多人问问题我都没看到，对不住了各位！！！

建议直接使用image-combiner功能强大

https://gitee.com/dromara/image-combiner

JAVA 画图 给图片底部添加文字标题

• 需求给图片底部添加文字编号

import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.RenderingHints;
import java.awt.font.FontRenderContext;
import java.awt.geom.Rectangle2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;

import javax.imageio.ImageIO;

/**
 * JAVA 画图(生成文字水印)
 * 
 * @author 杰宝宝
 * 
 */
public class ImageUtil {

	/**
	 * @param str
	 *            生产的图片文字
	 * @param oldPath
	 *            原图片保存路径
	 * @param newPath
	 *            新图片保存路径
	 * @param width
	 *            定义生成图片宽度
	 * @param height
	 *            定义生成图片高度
	 * @return
	 * @throws IOException
	 */
	public void create(String str, String oldPath, String newPath, int width, int height){
		try {
			File oldFile = new File(oldPath);
			Image image = ImageIO.read(oldFile);

			File file = new File(newPath);
			BufferedImage bi = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
			Graphics2D g2 = bi.createGraphics();
			g2.setBackground(Color.WHITE);
			g2.clearRect(0, 0, width, height);
			g2.drawImage(image, 0, 0, width - 25, height - 25, null); //这里减去25是为了防止字和图重合
			/** 设置生成图片的文字样式 * */
			Font font = new Font("黑体", Font.BOLD, 25);
			g2.setFont(font);
			g2.setPaint(Color.BLACK);

			/** 设置字体在图片中的位置 在这里是居中* */
			FontRenderContext context = g2.getFontRenderContext();
			Rectangle2D bounds = font.getStringBounds(str, context);
			double x = (width - bounds.getWidth()) / 2;
			//double y = (height - bounds.getHeight()) / 2; //Y轴居中
			double y = (height - bounds.getHeight());
			double ascent = -bounds.getY();
			double baseY = y + ascent;

			/** 防止生成的文字带有锯齿 * */
			g2.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON);

			/** 在图片上生成文字 * */
			g2.drawString(str, (int) x, (int) baseY);

			ImageIO.write(bi, "jpg", file);
		} catch (IOException e) {
			e.printStackTrace();
		} 
	}

	public static void main(String[] args) {
	
		try {
			ImageUtil img = new ImageUtil();
			img.create("编号：0011", "E:\\111.png", "E:\\222.png", 455, 455);
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
}

• 原图：
  

• 生成后：