[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; #1oyRD-
} y$C\b\hM
int i1=l; ErXzKf
int i2=mid+1; r>ca17
for(int cur=l;cur<=r;cur++){ -oR P ZtW
if(i1==mid+1) R /0zB
data[cur]=temp[i2++]; k~=_]sLn
else if(i2>r) *'jI>^o
data[cur]=temp[i1++]; Ty;P`Uv]r
else if(temp[i1] data[cur]=temp[i1++]; Ne9S90HsB6
else GPs//
data[cur]=temp[i2++]; pDV8B/{
} A{Dy3tm=
} /@QPJ~%8Ud
@pkQ2OM 2
} N(=Z4Nk5
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改进后的归并排序: %UokR"
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package org.rut.util.algorithm.support; @\s*f7
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import org.rut.util.algorithm.SortUtil; 7/b\NLeJ'
)LDBvpJyQ
/** ee\QK,QV
* @author treeroot #$0*Gd-N
* @since 2006-2-2 !}PZCbDhL
* @version 1.0 {7Q)2NC
*/ b:t|9FE%
public class ImprovedMergeSort implements SortUtil.Sort { tqXr6+!Q
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private static final int THRESHOLD = 10; @Tz}y"VG
%v)O!HC}
/* h1REL^!c
* (non-Javadoc) -fCR^`UOS
* ^e\H V4s
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ) o`ep{<t
*/ g`\5!R1
public void sort(int[] data) { `b?o%5V2x
int[] temp=new int[data.length]; :^H2D=z@
mergeSort(data,temp,0,data.length-1); [2\jQv\Y
} 5DxNHEuS
#bCQEhCy
private void mergeSort(int[] data, int[] temp, int l, int r) { 6%L#FSI
int i, j, k; 4U>g0
int mid = (l + r) / 2; ^bk:g}o
if (l == r) l#bE_PD;
return; BHNEP |=
if ((mid - l) >= THRESHOLD) MmQ"z_v
mergeSort(data, temp, l, mid); 7 F> a&r
else T7R,6qt
insertSort(data, l, mid - l + 1); r%\%tz'`j
if ((r - mid) > THRESHOLD) %i5tf;x6i
mergeSort(data, temp, mid + 1, r); '@dk3:3t
else >yf}9Zs
insertSort(data, mid + 1, r - mid); e82xBLxR%
x,M8NTb*
for (i = l; i <= mid; i++) { TY;%nT
temp = data; 7 >-(g+NF!
} W:8pmI
for (j = 1; j <= r - mid; j++) { Kw=][}d`D
temp[r - j + 1] = data[j + mid]; )}lO%B'K
} i62GZeE
int a = temp[l]; PvB{@82
int b = temp[r]; +;/ s0
for (i = l, j = r, k = l; k <= r; k++) { 8/T[dn
if (a < b) { hg2UZ% Y
data[k] = temp[i++]; 10IX84
a = temp; !xvAy3
} else { zmhL[1qj
data[k] = temp[j--]; F4PWL|1
b = temp[j]; t Z@OAPRx
} {4eI}p<
} {H3B1*Dk
} Pl\NzB,`
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/** )~-r&Q5d
* @param data O-&^;]ieJ
* @param l z-N N(G+
* @param i >!MRk[@ V-
*/ xSrjN
private void insertSort(int[] data, int start, int len) { (;9j#x
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); hip't@.uE
} %l[]n;*$
} sA2esA@C<o
} wC?>,LOl
} uj:1_&g
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堆排序： 0K4A0s_R`
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package org.rut.util.algorithm.support; 4Z.Dz@.c(
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import org.rut.util.algorithm.SortUtil; *$Y_ %}
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/** '*D>/hn|:]
* @author treeroot hc*tQ2
* @since 2006-2-2 pi5DDK
* @version 1.0 5,J.$Sax
*/ L)c]i'WZ
public class HeapSort implements SortUtil.Sort{ @,m 7%,
W`uq,r0Xsy
/* (non-Javadoc) P'^& SK
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) dU-nE5
*/ zX]l$Q+
public void sort(int[] data) { .d6b?t
MaxHeap h=new MaxHeap(); fJ=v?
h.init(data); QXW>}GdKZ
for(int i=0;i h.remove(); OwPXQ 3S
System.arraycopy(h.queue,1,data,0,data.length); Jl<pWjkZZ
} P*n/qj8h
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private static class MaxHeap{ G > t
1zgM$p
void init(int[] data){ ;3XOk+
this.queue=new int[data.length+1]; 6)c-s|#
for(int i=0;i queue[++size]=data; re4A5Ev$
fixUp(size); $18?Q+?3
} \5}*;O@
} _2hZGC%&E
@z^7*#vQv
private int size=0; ~G1B}c]
KL./
private int[] queue; (8~D^N6Z
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public int get() { ZW4$Ks2]Y
return queue[1]; h>F"GR?U_(
} q4v:s
Rg^ps
public void remove() { ;iW>i8
SortUtil.swap(queue,1,size--); M%WO
fixDown(1); j2%fAs<
} @}2EEo#
file://fixdown WL?qulC}h1
private void fixDown(int k) { }0?XF/e(R
int j; Shv$"x:W
while ((j = k << 1) <= size) { OZA^L;#>
if (j < size %26amp;%26amp; queue[j] j++; Ww"]3
if (queue[k]>queue[j]) file://不用交换 qeb}~FL"o
break; C-\3,
SortUtil.swap(queue,j,k); xIwILY|W=
k = j; O`5hjq#
} \AIFIy
} h^ K]ASj
private void fixUp(int k) { [N#4H3GM8
while (k > 1) { Km,%p@`m
int j = k >> 1; q0DRT4K
if (queue[j]>queue[k]) [RY Rt/?Q
break; J=&}$
SortUtil.swap(queue,j,k); |*DkriYY
k = j; -{q'Tmst
} upZtVdd
} U1(cBY
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} mT #A?C2
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} t1G__5wp
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SortUtil： nSRNd A
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package org.rut.util.algorithm; b 0qA
2j#Dwa(lZQ
import org.rut.util.algorithm.support.BubbleSort; U#&+n-npO
import org.rut.util.algorithm.support.HeapSort; pRzL}-[/v
import org.rut.util.algorithm.support.ImprovedMergeSort; nM ?Nf}
import org.rut.util.algorithm.support.ImprovedQuickSort; Lz!JLiMEET
import org.rut.util.algorithm.support.InsertSort; @|5B}%!
import org.rut.util.algorithm.support.MergeSort; ioEjbqD<
import org.rut.util.algorithm.support.QuickSort; ?^2nrh,n+
import org.rut.util.algorithm.support.SelectionSort; &er,Wyc(
import org.rut.util.algorithm.support.ShellSort; Y`(~eNX^%
97qf3^gGd
/** BMqr YW
* @author treeroot 7t1as.
* @since 2006-2-2 /]U;7)
* @version 1.0 (G/(w%#7_
*/ R>]7l!3^1
public class SortUtil { z~==7:Os
public final static int INSERT = 1; D/JSIDd
public final static int BUBBLE = 2; }+Q4s]
public final static int SELECTION = 3; b^&azUkMN
public final static int SHELL = 4; C"$~w3A k
public final static int QUICK = 5; *l;S"}b*,_
public final static int IMPROVED_QUICK = 6; JU.!<
public final static int MERGE = 7; $7W5smW/
public final static int IMPROVED_MERGE = 8; [$pb
public final static int HEAP = 9; jD%|@ux
|>[qC O
public static void sort(int[] data) { CyS%11L
sort(data, IMPROVED_QUICK); lHDZfwJ&C1
} K&zW+Cb
private static String[] name={ 8};kNW^2m
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" KVr9kcs
}; U{/fY/kq
l~w^I|M^C
private static Sort[] impl=new Sort[]{ seRf q&
new InsertSort(), /.=aA~|
new BubbleSort(), CBF<53TshR
new SelectionSort(), lSlZ^.&
new ShellSort(), QnP?j&
new QuickSort(), G+Bk!o
new ImprovedQuickSort(), znSlSQpTv
new MergeSort(), I$p1^8~L
new ImprovedMergeSort(), <QO1Yg7}
new HeapSort() 0kNKt(_
}; REYvFx?i
;obOr~Jx'5
public static String toString(int algorithm){ d7mn(= &
return name[algorithm-1]; }2;iIw`
} ?qi~8.<w
#"lb9._M
public static void sort(int[] data, int algorithm) { /!^,+
impl[algorithm-1].sort(data); !>D[Y
} UCK;?]
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public static interface Sort { `/'p1?Z"
public void sort(int[] data); _ E-\aS{
} =.&8ghJ*M
K*{RGE
public static void swap(int[] data, int i, int j) { I>JE\## ^n
int temp = data; rsLkH&aM
data = data[j]; PH%'^YAl7
data[j] = temp; MG~Z)+g=y
} Rd5-ao4
} EI7n|X a1q