[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; Y'P8`$
} Smp+}-3O
int i1=l; b#M<b.R)
int i2=mid+1; ?cJ$=
for(int cur=l;cur<=r;cur++){ fjb2-K
if(i1==mid+1) M\%{!Wzo8
data[cur]=temp[i2++]; 7]Egu D4
else if(i2>r) {2nXItso
data[cur]=temp[i1++]; I6\3wU~).
else if(temp[i1] data[cur]=temp[i1++]; km^AX:r1
else `C1LR,J
data[cur]=temp[i2++]; d7&PbITN
} M3''xrpC
} ,ZSuo4
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} E*%{Nn
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改进后的归并排序: ru&RL HFV
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package org.rut.util.algorithm.support; ;9~z_orNQZ
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import org.rut.util.algorithm.SortUtil; rk~/^(!
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/** kahv1s-
* @author treeroot zb<+x(0y"
* @since 2006-2-2 bY<"$);s
* @version 1.0 B}Qo8i7 z
*/ > +SEze
public class ImprovedMergeSort implements SortUtil.Sort { S$#Awen"@
*n47.(a2i
private static final int THRESHOLD = 10; YcI]_[
ldxUq,p
/* A-~)7-
* (non-Javadoc) #Ky0` n
* eD}Ga4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) T&c[m!}X|t
*/ ,ToED
public void sort(int[] data) { 3S,pd0;
int[] temp=new int[data.length]; }"T:z{n
mergeSort(data,temp,0,data.length-1); B4b UcYk
} 1^,rS
<Z5prunov
private void mergeSort(int[] data, int[] temp, int l, int r) { V;z?m)ur
int i, j, k; C$5v:Fk
int mid = (l + r) / 2; YP6+o#==
if (l == r) V6!oe^a7'
return; U!Lws#\X
if ((mid - l) >= THRESHOLD) ":Q70*xSm
mergeSort(data, temp, l, mid); qj|GAGrQ2
else %!q(zql
insertSort(data, l, mid - l + 1); [AU1JO`\"
if ((r - mid) > THRESHOLD) < ;g0?M\
mergeSort(data, temp, mid + 1, r); i{,>2KVC|
else ' Sl9xd
insertSort(data, mid + 1, r - mid); ^a(q7ZfY
b/ynCf8X
for (i = l; i <= mid; i++) { &O'yhAP] j
temp = data; # WxH
} 8FMP)N4+
for (j = 1; j <= r - mid; j++) { Y8P
temp[r - j + 1] = data[j + mid]; NO<myN+N
} %jkd}D
int a = temp[l]; .-r 1.'.A
int b = temp[r]; gt ?&!S^
for (i = l, j = r, k = l; k <= r; k++) { snK/,lm.
if (a < b) { |[qI2-el?
data[k] = temp[i++]; EH[?*>+s
a = temp; Ug9o/I@}C
} else { Q:-/@$&i
data[k] = temp[j--]; zR/ATm]9
b = temp[j]; :ortyCB:H
} \UiuJ+
} wU=(_S,c
} TEYbB=.
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/** o~~_>V)W
* @param data UqAvFCy
* @param l ='mqfGRi>
* @param i 2^juLXc|R
*/ _x:K%1_[
private void insertSort(int[] data, int start, int len) { \'p)kDf
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); jHFdDw|N`
} `=.{i}V
} F|"NJ*o}
} 5ogbse"
} h rZ\ O?j
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堆排序： vzVl2
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package org.rut.util.algorithm.support; _{A($/~c?
wp@c;gK7
import org.rut.util.algorithm.SortUtil; u2DsjaL
SmRU!C$A
/** DO0["O74
* @author treeroot Z,!Rj7wZ
* @since 2006-2-2 {yJ{DU?%Y
* @version 1.0 79i>@u%
*/ O/GD[9$i
public class HeapSort implements SortUtil.Sort{ jx-W$@
- @
/* (non-Javadoc) {Xl 5F.q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) G;tIhq[$Vb
*/ r*kk/$,2
public void sort(int[] data) { HC$_p,9OV
MaxHeap h=new MaxHeap(); MRiETd"
h.init(data); R^K<u#>K
for(int i=0;i h.remove(); }F^c*xt[
System.arraycopy(h.queue,1,data,0,data.length); c|I{U[(U
} bd%/dr
u[cbRn,W
private static class MaxHeap{ >SccoI
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void init(int[] data){ K}Aaflq
this.queue=new int[data.length+1]; Um*{~=;u
for(int i=0;i queue[++size]=data; Ha;^U/0|
fixUp(size); >WDb89kC=
} (/Nw
} }bHdU]$}
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private int size=0; 03#r F@e
7|H !(a'
private int[] queue; B:Msn)C~
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public int get() { =7Nm=5@
return queue[1]; YsDn?pD@
} .\i9}ye
?-*_v//g
public void remove() { 1!,lI?j,
SortUtil.swap(queue,1,size--); YMJ?t"
fixDown(1); tR*JM$T
} 5.idC-\
file://fixdown N=-hXgX^
private void fixDown(int k) { 8r+R~{
int j; `y m^0x8
while ((j = k << 1) <= size) { qksN {t
if (j < size %26amp;%26amp; queue[j] j++; Pgb<;c:4
if (queue[k]>queue[j]) file://不用交换 % &{>oEQ
break; t[7YMk
SortUtil.swap(queue,j,k); spgY &OI;
k = j; [O9(sWL'
} ~[l2"@
} C$Ldz=d
private void fixUp(int k) { = R; 0Ed&b
while (k > 1) { fokOjTE
int j = k >> 1; <?QY\wyikz
if (queue[j]>queue[k]) rAk*~OK
break; E WOn"
SortUtil.swap(queue,j,k); mJ[LmQ<:
k = j; +#n5w8T)M
} %<:?{<~wH9
} JYs*1<
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} ]MRE^Je\h
lzw3 x
} }yC ve
% ;09J
SortUtil： lD.PNwM
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package org.rut.util.algorithm; vD^^0-Pk6
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import org.rut.util.algorithm.support.BubbleSort; )%f]`<o
import org.rut.util.algorithm.support.HeapSort; 'BcxKqC
import org.rut.util.algorithm.support.ImprovedMergeSort; x]J{EA{+
import org.rut.util.algorithm.support.ImprovedQuickSort; zH}u9IR3`
import org.rut.util.algorithm.support.InsertSort; vUY?Eb[
import org.rut.util.algorithm.support.MergeSort; B$_F)2%m;
import org.rut.util.algorithm.support.QuickSort; VNx}ADXu]
import org.rut.util.algorithm.support.SelectionSort; C.FGi`rrm
import org.rut.util.algorithm.support.ShellSort; ]Y}faW(&Y
m>jX4D7KZ
/** ` L6H2:pf
* @author treeroot [AfV+$
* @since 2006-2-2 -|:7<$2#I
* @version 1.0 +TfMj1Zx
*/ kT[]^Jtc
public class SortUtil { GK2IY
public final static int INSERT = 1; KSMe#Qnw
public final static int BUBBLE = 2; u'<Y#bsR#/
public final static int SELECTION = 3; `9kjYSd#E
public final static int SHELL = 4; !f V.#9AB#
public final static int QUICK = 5; e}-uU7O
public final static int IMPROVED_QUICK = 6; AW!|xA6'`:
public final static int MERGE = 7; VgN`' iC`I
public final static int IMPROVED_MERGE = 8; (3&@c!E
public final static int HEAP = 9; g*AnrQ}P
PQlG!
public static void sort(int[] data) { P)tXU
sort(data, IMPROVED_QUICK); j}X4#{jgC
} 67~m9pk
private static String[] name={ |Gzd|$%Oq
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" SrN0f0
}; ~g;(`g
'N,x=1R5
private static Sort[] impl=new Sort[]{ Rl=NVo
new InsertSort(), /?9e{,\s
new BubbleSort(), "z@qG]#5
new SelectionSort(), b*?="%eE(
new ShellSort(), !{Y$5)Xh`]
new QuickSort(), TyGXDU
new ImprovedQuickSort(), :tzCuK?e
new MergeSort(), NrS1y"#d9
new ImprovedMergeSort(), )Cu"M#`
new HeapSort() o6B!ikz 8
}; - Nplx
2\EMtR>.M'
public static String toString(int algorithm){ -kQ{~">w
return name[algorithm-1]; /c3DltOdr
} )Bd+jli|s
4vE,nx=
public static void sort(int[] data, int algorithm) { ?$=N!>P#
impl[algorithm-1].sort(data); X Uh)z
} 6j_ A{*~Ng
>q[Elz=dI
public static interface Sort { d~GT w:
public void sort(int[] data); 8c]\4iau
} }IEYH&4!
aViJ?*
public static void swap(int[] data, int i, int j) { =We}&80x
int temp = data; :^J(%zy
data = data[j]; uop_bJ
data[j] = temp; BD,~M*%z
} WpSdukXY{
} _3hCu/BV