[JAVA]用Java实现的各种排序

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0 发表于: 2007-03-15

用Java语言实现的各种排序，包括插入排序、冒泡排序、选择排序、Shell排序、快速排序、归并排序、堆排序、SortUtil等。
插入排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;
/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class InsertSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1);
}
}
}

}

冒泡排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class BubbleSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for(int i=0;i for(int j=data.length-1;j>i;j--){
if(data[j] SortUtil.swap(data,j,j-1);
}
}
}
}

}

选择排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class SelectionSort implements SortUtil.Sort {

/*
* (non-Javadoc)
*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for (int i = 0; i < data.length; i++) {
int lowIndex = i;
for (int j = data.length - 1; j > i; j--) {
if (data[j] < data[lowIndex]) {
lowIndex = j;
}
}
SortUtil.swap(data,i,lowIndex);
}
}

}

Shell排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class ShellSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
for(int i=data.length/2;i>2;i/=2){
for(int j=0;j insertSort(data,j,i);
}
}
insertSort(data,0,1);
}

/**
* @param data
* @param j
* @param i
*/
private void insertSort(int[] data, int start, int inc) {
int temp;
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc);
}
}
}

}

快速排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class QuickSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
quickSort(data,0,data.length-1);
}
private void quickSort(int[] data,int i,int j){
int pivotIndex=(i+j)/2;
file://swap
SortUtil.swap(data,pivotIndex,j);

int k=partition(data,i-1,j,data[j]);
SortUtil.swap(data,k,j);
if((k-i)>1) quickSort(data,i,k-1);
if((j-k)>1) quickSort(data,k+1,j);

}
/**
* @param data
* @param i
* @param j
* @return
*/
private int partition(int[] data, int l, int r,int pivot) {
do{
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot);
SortUtil.swap(data,l,r);
}
while(l SortUtil.swap(data,l,r);
return l;
}

}

改进后的快速排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class ImprovedQuickSort implements SortUtil.Sort {

private static int MAX_STACK_SIZE=4096;
private static int THRESHOLD=10;
/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int[] stack=new int[MAX_STACK_SIZE];

int top=-1;
int pivot;
int pivotIndex,l,r;

stack[++top]=0;
stack[++top]=data.length-1;

while(top>0){
int j=stack[top--];
int i=stack[top--];

pivotIndex=(i+j)/2;
pivot=data[pivotIndex];

SortUtil.swap(data,pivotIndex,j);

file://partition
l=i-1;
r=j;
do{
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot));
SortUtil.swap(data,l,r);
}
while(l SortUtil.swap(data,l,r);
SortUtil.swap(data,l,j);

if((l-i)>THRESHOLD){
stack[++top]=i;
stack[++top]=l-1;
}
if((j-l)>THRESHOLD){
stack[++top]=l+1;
stack[++top]=j;
}

}
file://new InsertSort().sort(data);
insertSort(data);
}
/**
* @param data
*/
private void insertSort(int[] data) {
int temp;
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1);
}
}
}

}

归并排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class MergeSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int[] temp=new int[data.length];
mergeSort(data,temp,0,data.length-1);
}

private void mergeSort(int[] data,int[] temp,int l,int r){
int mid=(l+r)/2;
if(l==r) return ;
mergeSort(data,temp,l,mid);
mergeSort(data,temp,mid+1,r);
for(int i=l;i<=r;i++){
temp=data; q,ur[ &<
} h4N%(?7
int i1=l; 22`N(_
int i2=mid+1; HzuB.B<
for(int cur=l;cur<=r;cur++){ ;`CNe$y
if(i1==mid+1) 9pY`_lxa>
data[cur]=temp[i2++]; fG{ 9doUD
else if(i2>r) RlW7l1h&
data[cur]=temp[i1++]; !/]vt?v#^
else if(temp[i1] data[cur]=temp[i1++]; |~V`Es +j
else 4I %/}+Q
data[cur]=temp[i2++]; g#Doed.30=
} Zcq4?-&
} a d,0*(</
4=b{k,kzgA
} heF<UMI
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改进后的归并排序: Gd=l{~
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package org.rut.util.algorithm.support; B^{87YR
k-~HUC.A.
import org.rut.util.algorithm.SortUtil; R3`Rrj Z
0nX.%2p#Je
/** Gb?O-z%8*
* @author treeroot JE[+
* @since 2006-2-2 >mWu+Nn:
* @version 1.0 l>H G|ol
*/ JsA9Xdk`
public class ImprovedMergeSort implements SortUtil.Sort { T@. $Zpz
74hQ?Atw:
private static final int THRESHOLD = 10; GiF})e}
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/* Dq~PxcnI
* (non-Javadoc) 1!;}#m7v
* *`(/wE2v]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) pPezy:
*/ wd=xs7Dz<p
public void sort(int[] data) { p| #gn<z}
int[] temp=new int[data.length]; |>Xw"]b;
mergeSort(data,temp,0,data.length-1); C}~/(;1V=
} cuw3}4m%
"eH~/6A
private void mergeSort(int[] data, int[] temp, int l, int r) { H$ sNp\[{
int i, j, k; TF@HwF"#
int mid = (l + r) / 2; D(GAC!|/]
if (l == r) rCmxv7" a}
return; Z_^v#FJ'l
if ((mid - l) >= THRESHOLD) ;[_w&"[6a
mergeSort(data, temp, l, mid); MKuy?mri~
else M?UlC
insertSort(data, l, mid - l + 1); ,u,]ab
if ((r - mid) > THRESHOLD) &<u pjb
mergeSort(data, temp, mid + 1, r); L-ZJ[#D
else \I\'c.$I.Y
insertSort(data, mid + 1, r - mid); FC= %_y
`B`/8Cvg
for (i = l; i <= mid; i++) { x+O}RD*G
temp = data; '(/ZJ88JP
} ]Mh7;&<6[
for (j = 1; j <= r - mid; j++) { !n`ogzOh
temp[r - j + 1] = data[j + mid]; 6g ,U+~
} %5_eos&<^)
int a = temp[l]; V.IgEE]
int b = temp[r]; ':7%@2Zo
for (i = l, j = r, k = l; k <= r; k++) { |U_48
if (a < b) { nI4xK
data[k] = temp[i++]; mf26AIlkQ
a = temp; /D[GXX
} else { 5JbPB!5;
data[k] = temp[j--]; y*M,&,$
b = temp[j]; ta+'*@V+G
} {-rK:*yP'u
} Po[u6K2&
} mI=^7'Mk
`>fN?He
/** @1#$
* @param data t|*PC
* @param l @o+T<}kWX
* @param i S,5>g07-`
*/ _"Q +G@@
private void insertSort(int[] data, int start, int len) { GLb}_-|
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); DA oOs}D
} *@Z/L26s;=
} ]xfAdBi
} <69/ZI),Y{
} x5m .MQ J
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堆排序： Jkt L|u:k
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package org.rut.util.algorithm.support; Z*kGWL
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import org.rut.util.algorithm.SortUtil; a4,bP*H
^(8 i``V
/** uNnwz%w
* @author treeroot CF^7 {g(y_
* @since 2006-2-2 vi0% jsI
* @version 1.0 \%NhggS*
*/ .i/]1X*;r^
public class HeapSort implements SortUtil.Sort{ ^h^2='p
JRA.,tQc
/* (non-Javadoc) }i/&m&VU
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ta!.oC[
*/ w\_NrsO!x
public void sort(int[] data) { .c"UlOZ&w^
MaxHeap h=new MaxHeap(); v?<x"XKR
h.init(data); i#1T68y}
for(int i=0;i h.remove(); Ii*v(`2b
System.arraycopy(h.queue,1,data,0,data.length); )+ Wr- Yay
} 5vYh~|
j&fr4t3
private static class MaxHeap{ jjvm<;lv
~>D;2 S(a
void init(int[] data){ P,iLqat
this.queue=new int[data.length+1]; ru(Xeojv#
for(int i=0;i queue[++size]=data; c ~YD|l
fixUp(size); g$dL5N7
} KN~E9oGs
} $2>tfKhtA
FTCp3g
private int size=0; 'A!Dg
:M|c,SQK
private int[] queue; T|ZZkNP|6
P xpz7He
public int get() { S97.O@V!$
return queue[1]; u{H,i(mx?
} :`3b|u=KZ
UXQ{J5Ox+
public void remove() { 6{azzk8
SortUtil.swap(queue,1,size--); 8<!qT1
fixDown(1); 2y_rsu\
} (:+IS W
file://fixdown r-N2*uYtu
private void fixDown(int k) { s^V8FH
int j; @dCu]0oNI
while ((j = k << 1) <= size) { y13=y}dyDH
if (j < size %26amp;%26amp; queue[j] j++; $o]zNW;X
if (queue[k]>queue[j]) file://不用交换 GetUCb%1
break; A$XjzTR
SortUtil.swap(queue,j,k); h*%T2
k = j; `Q(ac| 0
} 7=QV^G
} }lpcbm
private void fixUp(int k) { crgYr$@s?
while (k > 1) { ~BS*x+M
int j = k >> 1; 5)$U<^uy
if (queue[j]>queue[k]) M8cLh!!
break; ziH2<@
SortUtil.swap(queue,j,k); t_]UseP$RF
k = j; R@VO3zsW
} 6{7O
} &g& &-=7)
>P0AGZ
} ^G2vA8%
Plq[Ml9
} "apv)xdW
JyB>,t)
SortUtil： 4uftx1o
GU[Cq=k
package org.rut.util.algorithm; oC7#6W:@w
~!&[;EM<bm
import org.rut.util.algorithm.support.BubbleSort; dhVwS$O )
import org.rut.util.algorithm.support.HeapSort; q!ZmF1sU
import org.rut.util.algorithm.support.ImprovedMergeSort; &y(aByI y
import org.rut.util.algorithm.support.ImprovedQuickSort; n/|/Womr
import org.rut.util.algorithm.support.InsertSort; /Hx0=I
import org.rut.util.algorithm.support.MergeSort; 6op\g].P
import org.rut.util.algorithm.support.QuickSort; YKx0Zs
import org.rut.util.algorithm.support.SelectionSort; X4k/7EA
import org.rut.util.algorithm.support.ShellSort; wcL0#[)
4Dd9cG,lN
/** ?x[>g!r
* @author treeroot @2$8o]et
* @since 2006-2-2 _:K}DU'6
* @version 1.0 X_YD[
*/ =f|>7m.p
public class SortUtil { _x'StD
public final static int INSERT = 1; 8n:D#`K
public final static int BUBBLE = 2; ^7''x,I
public final static int SELECTION = 3; A+}4N%kh
public final static int SHELL = 4; l2v}PALs
public final static int QUICK = 5; W1!eY,1}
public final static int IMPROVED_QUICK = 6; #rC/y0niH
public final static int MERGE = 7; +]e4c;`ko}
public final static int IMPROVED_MERGE = 8; 'H9~rq7
public final static int HEAP = 9; <5#e.w
& vIKNGJ^
public static void sort(int[] data) { Bf}_ Jw-=
sort(data, IMPROVED_QUICK); $-0u`=!
} Aa Ma9hvT!
private static String[] name={ zc{C+:3$^
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" $+);!?^|:
}; Tc*PDt0C
l^"G\ZVI
private static Sort[] impl=new Sort[]{ S-H3UND"
new InsertSort(), @gj5'
new BubbleSort(), zKutx6=aj
new SelectionSort(), K%k,-
new ShellSort(), P}I*SV0
new QuickSort(), {h=Ai[|l4Q
new ImprovedQuickSort(), @hvq,[
new MergeSort(), [n"<(~
new ImprovedMergeSort(), ?`XKaD! f
new HeapSort() 'YeJGzsJp
}; s^ a`=kO
d]^i1
public static String toString(int algorithm){ ;@ e|}Gk
return name[algorithm-1]; *Tlv'E.M
} r__M1 !3
2P=;r:cx
public static void sort(int[] data, int algorithm) { ;:4puv+]
impl[algorithm-1].sort(data); 88K*d8m
} 9T1G/0k-
iI1t P
public static interface Sort { 1:t>}[Y
public void sort(int[] data); 'FhnSNT(4=
} |3LMVN
Cw}\t!*!
public static void swap(int[] data, int i, int j) { h]#)41y<
int temp = data; 1rEP)66N
data = data[j]; :]s] =q&]
data[j] = temp; p1nA7;B-m
} p"@|2a
} 9?8`"v