[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; yzzJKucVU:
} qnj'*]ysBC
int i1=l; |rZMcl/
int i2=mid+1; LfFXYX^
for(int cur=l;cur<=r;cur++){ oo7}Hg>
if(i1==mid+1) xY!ud)
data[cur]=temp[i2++]; Nf3UVK8LtS
else if(i2>r) s<k2vbhI
data[cur]=temp[i1++]; vPz7*w
else if(temp[i1] data[cur]=temp[i1++]; -rm[.
else bGgpPV
data[cur]=temp[i2++]; PRTjXq6)5
} uZ-ZZE C
} <9yh:1"X
GfEWms8z
} m}=E$zPbO
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改进后的归并排序: 9jEH"`qqk
L*A-&9.p3
package org.rut.util.algorithm.support; 0*rD'?)K+
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import org.rut.util.algorithm.SortUtil; ]SRpMZ
A0k?$ko
/** ]- `wXi"
* @author treeroot ^ W?cuJ8
* @since 2006-2-2 q^EY?;Y
* @version 1.0 DmLx"%H3
*/ |3@DCbT
public class ImprovedMergeSort implements SortUtil.Sort { 9_O4yTL
A!x&,<
private static final int THRESHOLD = 10; a6e{bAuq
bSX/)')jU
/* mJk\$/Kh
* (non-Javadoc) ja';NIO-
* B#SVN Lv
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (A6~mi r!
*/ KbvMp1'9P
public void sort(int[] data) { ZCPUNtOl
int[] temp=new int[data.length]; SFDTHvXu#_
mergeSort(data,temp,0,data.length-1); Q zaD\^OF
} z"UC$
!.$L=>:V
private void mergeSort(int[] data, int[] temp, int l, int r) { /+SLq`'u)
int i, j, k; rHX^bcYK
int mid = (l + r) / 2; <L#d<lx
if (l == r) }>u `8'2v
return; +W*~=*h|
if ((mid - l) >= THRESHOLD) y@!o&,,mq
mergeSort(data, temp, l, mid); g)#{<#*2
else qclc--fsE
insertSort(data, l, mid - l + 1); }>0>OqvF
if ((r - mid) > THRESHOLD) 6xJffl
mergeSort(data, temp, mid + 1, r); \?^2}K/
else Z}dK6h5+'
insertSort(data, mid + 1, r - mid); vb6EO[e%I
F1L[3D^-
for (i = l; i <= mid; i++) { !!^z6jpvn
temp = data; <dH@e
} Q,xL8i M,
for (j = 1; j <= r - mid; j++) { l_+@Xpl
temp[r - j + 1] = data[j + mid]; d)YlD]I
} 3 J04 $cD
int a = temp[l]; }:ZA)
int b = temp[r]; 7D#y
for (i = l, j = r, k = l; k <= r; k++) { Zg(Y$ h\
if (a < b) { vCaN[
data[k] = temp[i++]; UGhEaKH~R
a = temp; ][MtG
} else { L#UR>Z#9
data[k] = temp[j--]; +ZOiL[rS
b = temp[j]; chE!,gik
} hb5K"9Y
} ;J5z
} PWpt\g
p1Zb&:+
/** GYaP"3Lu
* @param data V;XKvH
* @param l |0y#} |/
* @param i U@mznf* J
*/ RQx8Du<
private void insertSort(int[] data, int start, int len) { LEgP-sW
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); FRrp@hE
} yS\&2"o
} \%=\4%:
} :-k|jt
} MCT1ZZpPr
r<e%;S
堆排序： RU:Rt'
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package org.rut.util.algorithm.support; y~ =H`PAE
ijF_ KP'
import org.rut.util.algorithm.SortUtil; ssi7)0
MePD:;mm^
/** $>XeC}"x68
* @author treeroot JF.Lo;
* @since 2006-2-2 c0@8KW[,
* @version 1.0 lS.Adl^k
*/ c[dzO.~
public class HeapSort implements SortUtil.Sort{ ;hX(/T
vjGQ!xF
/* (non-Javadoc) 0Z9DewwP
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Z.6dL
*/ hi0HEm\
public void sort(int[] data) { 8vY-bm,e
MaxHeap h=new MaxHeap(); >d2Fa4u3
h.init(data); 5~JT*Ny
for(int i=0;i h.remove(); `Z?wj@H1`
System.arraycopy(h.queue,1,data,0,data.length); ;<AcW.jx
} EiW|+@1
/fr>Fd
private static class MaxHeap{ u]J@65~'b
*x"80UXL
void init(int[] data){ #.bW9j/
this.queue=new int[data.length+1]; $"^K~5Q
for(int i=0;i queue[++size]=data; 86r5!@WN
fixUp(size); KQdIG9O+6
} L_8zZ8 o
} $7S"4rou
k"(]V
private int size=0; 0M_oFx
x<NPp&GE
private int[] queue; C9n%!()>
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public int get() { W(s4R,j
return queue[1]; |^pev2g
} 9E!le=>
Sjpx G@k
public void remove() { kXMp()N8`
SortUtil.swap(queue,1,size--); G'ykcB._
fixDown(1); }rTH<!j
} du3f'=q6|
file://fixdown _IYaMo.n
private void fixDown(int k) { %BqaVOKJ"f
int j; k9^Hmhjw
while ((j = k << 1) <= size) { IHl q27O
if (j < size %26amp;%26amp; queue[j] j++; ^OR0Vp>L
if (queue[k]>queue[j]) file://不用交换 N@q}eGe
break; }SN( ^3N
SortUtil.swap(queue,j,k); sHP-@
k = j; J!6FlcsZm
} RLB3 -=9t
} *T|B'80
private void fixUp(int k) { -4a9BE".
while (k > 1) { #WpkL]g2+%
int j = k >> 1; {meX2Z4
if (queue[j]>queue[k]) K}VCFV
break; j2Zp#E!
SortUtil.swap(queue,j,k); $B+| &]a
k = j; *eVq(R9?T
} tli.g
} )ZJvx%@i
&SY!qTxF
} l]nt@0+
aV3:{oL
} vJkc/7
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SortUtil： XpQOl
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package org.rut.util.algorithm; U=on}W3V2
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import org.rut.util.algorithm.support.BubbleSort; ^u/%zL
import org.rut.util.algorithm.support.HeapSort; a^|DD#5
import org.rut.util.algorithm.support.ImprovedMergeSort; dhl[=Y` Q
import org.rut.util.algorithm.support.ImprovedQuickSort; g*|j+<:7
import org.rut.util.algorithm.support.InsertSort; %\As
import org.rut.util.algorithm.support.MergeSort; \{,TpK.
import org.rut.util.algorithm.support.QuickSort; W.7rHa
import org.rut.util.algorithm.support.SelectionSort; {|+Y;V`
import org.rut.util.algorithm.support.ShellSort; (L_-!=e
!d*[QD8
/** IP~!E_e}\
* @author treeroot ^4y]7p
* @since 2006-2-2 ;SR ESW
* @version 1.0 PxHFH pL
*/ THA9OXP
public class SortUtil { ]Z JoC!u
public final static int INSERT = 1; DHidI\*gT
public final static int BUBBLE = 2; (JhX:1
public final static int SELECTION = 3; &K)8
public final static int SHELL = 4; weitDr6
public final static int QUICK = 5; wucdXj{%
public final static int IMPROVED_QUICK = 6; l.[pnLD
public final static int MERGE = 7; CI|lJ
public final static int IMPROVED_MERGE = 8; |m19fg3u
public final static int HEAP = 9; PJnC
B[vj X"yg
public static void sort(int[] data) { da{]B5p\
sort(data, IMPROVED_QUICK); h$>F}n j
} !,J# r
private static String[] name={ 73WSW/^F
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" H#-3
}; I-7LT?r
.b:!qUE^
private static Sort[] impl=new Sort[]{ $|4C]Me (
new InsertSort(), l?Y^3x}j
new BubbleSort(), `sxfj)s
new SelectionSort(), uFd$*`jS
new ShellSort(), q^@*{H
new QuickSort(), yoi4w 7:
new ImprovedQuickSort(), Z5{a7U4z_
new MergeSort(), &dtk&P{
new ImprovedMergeSort(), <G"cgN#]
new HeapSort() bRC243]g*A
}; #%"q0"
4p_C+4
public static String toString(int algorithm){ &[.5@sv
return name[algorithm-1]; ."K>h3(&V
} K,f:X g!:
qZoDeN-CC
public static void sort(int[] data, int algorithm) { UNI< r
impl[algorithm-1].sort(data); I Mgd2qIC
} idmU.`
QbU5FPiN
public static interface Sort { B( [x8A]
public void sort(int[] data); eh#37*-
} yIw}n67
^}3^|jF
public static void swap(int[] data, int i, int j) { <QtZ6-;_f
int temp = data; fF:57*ys
data = data[j]; -F[8ZiZ
data[j] = temp; ^s,3*cAU
} yr]ja-Y
} \}-4(Xdaq