[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; }K^v Ujl
} jM}(?^@
int i1=l; yJ/YK
int i2=mid+1; h/Yxm2
for(int cur=l;cur<=r;cur++){ ODEFs?%'
if(i1==mid+1) zpD?5
data[cur]=temp[i2++]; %:s+5*SKe
else if(i2>r) Xs{PAS0
data[cur]=temp[i1++]; IH&0>a
else if(temp[i1] data[cur]=temp[i1++]; eEBo:Rc9
else 78\j
data[cur]=temp[i2++]; *c\XQy
} dF[|9%)
} &:&~[4>%a
3G[|4v?[<_
} OwT_W)$
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改进后的归并排序: #mU<]O
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package org.rut.util.algorithm.support; X}xf_3N "
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import org.rut.util.algorithm.SortUtil; @ta:9wZ
qyxd9Lk1
/** dk^jv +
* @author treeroot P-a8S*RRa
* @since 2006-2-2 Xt:$H6 y
* @version 1.0 kia[d984w
*/ z#Fel/L`O
public class ImprovedMergeSort implements SortUtil.Sort { #IZ.px
s1E 0atT
private static final int THRESHOLD = 10; I(Qz%/Ox
(5@H<c^6
/* G pI4QzR
* (non-Javadoc) /@|iI<|
* >|c?ZqW
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) E}KGZSj
*/ 8{=|<
public void sort(int[] data) { hsQDRx%H}
int[] temp=new int[data.length]; *RxJ8.G
mergeSort(data,temp,0,data.length-1); 4BUG\~eI3
} "AZ|u#0P
%L^(eTi[
private void mergeSort(int[] data, int[] temp, int l, int r) { <$yA*
int i, j, k; aoZ|@x
int mid = (l + r) / 2; @!=Ds'MJC
if (l == r) #Lpw8b6
return; "T_9_6tH
if ((mid - l) >= THRESHOLD) }ymW};W
mergeSort(data, temp, l, mid); $K!Jm7O\
else ~Ni
insertSort(data, l, mid - l + 1); nhdZC@~E0
if ((r - mid) > THRESHOLD) F{;#\Ob
mergeSort(data, temp, mid + 1, r); \wD/TLS}
else +Eh.PWEe
insertSort(data, mid + 1, r - mid); L'r&'y[
r&m49N,d
for (i = l; i <= mid; i++) { J{^md0l
temp = data; ;YR/7
} j&,Gv@
for (j = 1; j <= r - mid; j++) { WM`3QJb
temp[r - j + 1] = data[j + mid]; {daX?N|V
} u&#>)h
int a = temp[l]; jQ;/=9
int b = temp[r]; EP#2it]0]
for (i = l, j = r, k = l; k <= r; k++) { uUg;v/:
if (a < b) { IK\~0L;ozE
data[k] = temp[i++]; h\UKm|BZ
a = temp; F$)l8}
} else { ,eBC]4)B6
data[k] = temp[j--]; CdF;0A9.3
b = temp[j]; O\.^H/
} I4G0!"T+
} udqrHR5
} 9tJ0O5
f~T7?D0u}N
/** w[ v{)
* @param data ]B,tCBt
* @param l ,_u7@Ix
* @param i salC4z3
*/ F*[E28ia&
private void insertSort(int[] data, int start, int len) { EjLq&QR.
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); HP.=6bJWi
} t`z"=S
} D{N8q^Cs9
} !^%3
} aDdGhB
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堆排序： :')[pO_FW*
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package org.rut.util.algorithm.support; )$:1e)d
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import org.rut.util.algorithm.SortUtil; `[sFh%:
3:x(2 A
/** Vx$;wU Y
* @author treeroot XLn9NBT4K
* @since 2006-2-2 @q'kKVJs
* @version 1.0 0#8
*/ l1 Kv`v\
public class HeapSort implements SortUtil.Sort{ {nV/_o$$
`3F#k[IR
/* (non-Javadoc) .nD#:86M
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) T'5{p
*/ (zo7h
public void sort(int[] data) { '0D$C},^|8
MaxHeap h=new MaxHeap(); I_<VGUk
h.init(data); Q~(Gll;
for(int i=0;i h.remove(); m8fj\,X
System.arraycopy(h.queue,1,data,0,data.length); _= v4Iz0
} {]Zan'{PCO
`NW/Z/_
private static class MaxHeap{ ~*Y#Y{
f)*"X[)o
void init(int[] data){ \1<'XVS
this.queue=new int[data.length+1]; i5}Zk r
for(int i=0;i queue[++size]=data; Rml'{S
fixUp(size); ~*iF`T6
} n-ffX*zA(
} @N Yl4N
h0PDFMM<
private int size=0; AY/.vyS
XZ%,h
private int[] queue; { ptdOrN
EsGu#lD2
public int get() { E'LI0fr
return queue[1]; /L^g. ~
} .t@|2
*cb|9elF^
public void remove() { ;JkSZs3
SortUtil.swap(queue,1,size--); @Go_5X(
fixDown(1); N!K%aH~O
} '8q3ub<\
file://fixdown sq'm)g
private void fixDown(int k) { H~j@n!)
int j; Uc tlE>X`
while ((j = k << 1) <= size) { *$eH3nn6g
if (j < size %26amp;%26amp; queue[j] j++; %OBW/Ti
if (queue[k]>queue[j]) file://不用交换 j[r}!;O
break; W[&nQW$E
SortUtil.swap(queue,j,k); s>>&3jfM
k = j; !eyLh&]5
} O=o}uB-*6
} *wTX
private void fixUp(int k) { &nmBsl3Q.
while (k > 1) { geG0F}oC!
int j = k >> 1; OR@ 67Y
if (queue[j]>queue[k]) #`SAc`:n
break; [\ao#f0WR
SortUtil.swap(queue,j,k); doanTF4Da
k = j; B[uyr)$
} | 1B0
} ^?lpY{aa
~}_^$l8#-Q
} (ks>F=vk*
E'WXi!>7p
} rp@:i _]
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SortUtil： iV{_?f1jo
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package org.rut.util.algorithm; e4YfJd
JT 7WZc)
import org.rut.util.algorithm.support.BubbleSort; o26Y}W
import org.rut.util.algorithm.support.HeapSort; L~&S<5?
import org.rut.util.algorithm.support.ImprovedMergeSort; v^&HZk=(
import org.rut.util.algorithm.support.ImprovedQuickSort; q'jOI_b
import org.rut.util.algorithm.support.InsertSort; n5QO'Jr%[
import org.rut.util.algorithm.support.MergeSort; &y_t,8>5
import org.rut.util.algorithm.support.QuickSort; IUOf/mM5
import org.rut.util.algorithm.support.SelectionSort; =zn'0g,J4
import org.rut.util.algorithm.support.ShellSort; 2O kID WcM
I=L["]
/** 08ZvRy(Je<
* @author treeroot .F ?ww}2p]
* @since 2006-2-2 :%gc Sm
* @version 1.0 .<t{saToU
*/ (XOz_K6c%K
public class SortUtil { oRbWqN`F.
public final static int INSERT = 1; ,3?=W/Um4
public final static int BUBBLE = 2; hlVC+%8
public final static int SELECTION = 3; "==c
public final static int SHELL = 4; *9n[#2sM<
public final static int QUICK = 5; xC< )]
public final static int IMPROVED_QUICK = 6; G!FdTvx$
public final static int MERGE = 7; dg|+?M^9`
public final static int IMPROVED_MERGE = 8; 'pA%lc)
public final static int HEAP = 9; /o4_rzR?
s~,!E
public static void sort(int[] data) { k)knyEUi
sort(data, IMPROVED_QUICK); 1XN%&VR>^D
} \gP?uJ
private static String[] name={ Uv59 XF$
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" #s~ITG#H
}; Cx;it/8+
E zcch1
private static Sort[] impl=new Sort[]{ \B')2phE
new InsertSort(), @C-dCC?
new BubbleSort(), u4lM>(3Y}
new SelectionSort(), ,q*|R O
new ShellSort(), O[Z$~
new QuickSort(), ywm"{ U?8
new ImprovedQuickSort(), I6WHC*
new MergeSort(), ,U9j7E<4
new ImprovedMergeSort(), ,GWa3.&.d
new HeapSort() 0^{Tq0Ri[
}; Rs<S}oeLn
@%g:'^/
public static String toString(int algorithm){ T \34<+n1N
return name[algorithm-1]; ]>)}xfL &,
} pYCMJK-H
~H''RzN
public static void sort(int[] data, int algorithm) { 8k{XUn
impl[algorithm-1].sort(data); Le~D"d8
} a\-5tYo`u
Wr Wz+5M8
public static interface Sort { g?1bEOA!
public void sort(int[] data); (6[<+j&.
} LZ#A`&qUd
S%p,.0_
public static void swap(int[] data, int i, int j) { G]l/L\{
int temp = data; je\]j-0$u
data = data[j]; Q]/g=Nn ^~
data[j] = temp; W*H%\Y:N
} (Vey]J
} /pe.?Zd