[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; koa-sy)#L
} yz<$?Gblz
int i1=l; =5;tB
int i2=mid+1; =E w<s5C@
for(int cur=l;cur<=r;cur++){ Qv WvS9]
if(i1==mid+1) ";U#aK1p
data[cur]=temp[i2++]; o- v#Zl
else if(i2>r) X> T_Xc
data[cur]=temp[i1++]; `iNH`:[w
else if(temp[i1] data[cur]=temp[i1++]; lyD=n
else U#G<cV79
data[cur]=temp[i2++]; 2!_DkE
} .TM. v5B
} 2Krh&
SE$~Wbj?
} /.WIED}>
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改进后的归并排序: K(,MtY*
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package org.rut.util.algorithm.support; qi*Dd[OG
&n'@L9v81
import org.rut.util.algorithm.SortUtil; IhHKRb[
RT. %\)))
/** V!Pe%.>
* @author treeroot @u@,Edh
* @since 2006-2-2 u]*f^/6Q
* @version 1.0 l@0${&n
*/ Vq599M:)V
public class ImprovedMergeSort implements SortUtil.Sort { M`&78j
;4QE.&s`
private static final int THRESHOLD = 10; `\r<3?
&`IJ55Z-)
/* `x`zv1U
* (non-Javadoc) .lAPlJOO
* ;efF]")
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) xpJ=yxO
*/ m al?3*x/
public void sort(int[] data) { I|l5e2j
int[] temp=new int[data.length]; 9vP#/-g
mergeSort(data,temp,0,data.length-1); '=`af>Nc
} -(},%!-_
;$67GK
private void mergeSort(int[] data, int[] temp, int l, int r) { AqAL)`#K
int i, j, k; h0 Xc=nj
int mid = (l + r) / 2; ? q_%
if (l == r) A%cJ5dF8~
return; UX'q64F!
if ((mid - l) >= THRESHOLD) ?_B'#,tI
mergeSort(data, temp, l, mid); Zu*7t<W
else G{!(2D4!
insertSort(data, l, mid - l + 1); 4F"%X&$
if ((r - mid) > THRESHOLD) C/4r3A/u
mergeSort(data, temp, mid + 1, r); }}Zg/(
else vq+4so )/S
insertSort(data, mid + 1, r - mid); 2Ab`i!#
z(u,$vZ_
for (i = l; i <= mid; i++) { r>}z|I'
temp = data; 5,pEJ>dDD3
} pD!j#suMA
for (j = 1; j <= r - mid; j++) { <=Saf.
temp[r - j + 1] = data[j + mid]; 'jXJ!GFw
} Z2 Vri
int a = temp[l]; `An p;el
int b = temp[r]; !+z&] S3s
for (i = l, j = r, k = l; k <= r; k++) { D~FIv
if (a < b) { Y>T<Qn^D
data[k] = temp[i++]; ::_bEmk
a = temp; ^Kl*}
} else { j/jFS]iC
data[k] = temp[j--]; P:WxhO/
b = temp[j]; 9^8_^F
} C[';B)a
} ,vo]WIQ\:
} bk1.H@8
,rjl|F* T
/** 2*< PmKI
* @param data iaJLIrl
* @param l E5#ff5
* @param i \<hHZS
*/ +4p=a [
private void insertSort(int[] data, int start, int len) { ,|GjrT{vf
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 4s9.")G
} If]rg+|U
} /'zXb_R,$
} "sIww
} wwet90_g
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堆排序： 0e07pF/!
M?=I{}!@Q
package org.rut.util.algorithm.support; H]W'mm
6b%IPbb
import org.rut.util.algorithm.SortUtil; ?LJiFG]^m
x+TdTe;p
/** da~_(giD*
* @author treeroot G^cMY$?99
* @since 2006-2-2 /;TtMQt
* @version 1.0 m?gGFxo
*/ YS@TQ?
public class HeapSort implements SortUtil.Sort{ *Z\AO'h=Z
$ce*W9`
/* (non-Javadoc) Ly/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0176
*/ @FZ_[CYg
public void sort(int[] data) { ~N/a\%`
MaxHeap h=new MaxHeap(); t&p I
h.init(data); XwfR/4
for(int i=0;i h.remove(); AyW=.
System.arraycopy(h.queue,1,data,0,data.length); |#{ i7>2U
} ;>/yY]F7
XZS%az1%
private static class MaxHeap{ K2\)9
ujl?!
void init(int[] data){ vRn]u57O
this.queue=new int[data.length+1]; M]M>z>1*v
for(int i=0;i queue[++size]=data; y\4/M6
fixUp(size); +]( #!}oH
} W9oWj7&h
} Sb?Ua*(L:
K'/if5>Bc
private int size=0; $BT[fJ'k
GIT"J}b}
private int[] queue; HO_(it \
?Q$a@)x#
public int get() { o~W,VhCP
return queue[1]; GY %$7
} @4Zkkjc4b
H|7XfM
public void remove() { *_d N9
SortUtil.swap(queue,1,size--); x4MTE?hT
fixDown(1); 4<vi@,s
} I(WIT=Wi<
file://fixdown Y@<jvH1
private void fixDown(int k) { =}@1Z~
int j; %!AzFL J|Z
while ((j = k << 1) <= size) { Vugb;5Vl
if (j < size %26amp;%26amp; queue[j] j++; #qUGc`
if (queue[k]>queue[j]) file://不用交换 uix/O*^
break; kma>'P`G
SortUtil.swap(queue,j,k); ,L.V>Ae
k = j; )pe17T1|
} xX9snSGz
} dz>Jl},`k
private void fixUp(int k) { ?RIf0;G
while (k > 1) { h@'CmIZc
int j = k >> 1; 34[TM3L].
if (queue[j]>queue[k]) *-(o. !#1
break; >]%$lSCW\D
SortUtil.swap(queue,j,k); @H3x51PT(m
k = j; kwqY~@W
} ADVS}d!;]
} k4!_(X%8
V1GkX=H},
} 4*9t:D|}
s[dIWYs#
} [k(b<'
KF5r?|8M
SortUtil： @|sBnerE
,!LY:pMK
package org.rut.util.algorithm; $.:x3TsA
}~NXiUe
import org.rut.util.algorithm.support.BubbleSort; ^nNpT!o
import org.rut.util.algorithm.support.HeapSort; I.(@#v7T
import org.rut.util.algorithm.support.ImprovedMergeSort; 61_-G#W
import org.rut.util.algorithm.support.ImprovedQuickSort; 1c429&-
import org.rut.util.algorithm.support.InsertSort; WRAL/
import org.rut.util.algorithm.support.MergeSort; _%Ua8bR$
import org.rut.util.algorithm.support.QuickSort; OB\ZT@l
import org.rut.util.algorithm.support.SelectionSort; ]h&1|j1
import org.rut.util.algorithm.support.ShellSort; 1 ?Zw
kM1N4N7
/** Cz$q"U
* @author treeroot Lfdg5D5.P
* @since 2006-2-2 ij~-
* @version 1.0 CWRB/WH:
*/ +Mhk<A[s
public class SortUtil { %W2U$I5
public final static int INSERT = 1; f[.'V1
public final static int BUBBLE = 2; rlawH}1b
public final static int SELECTION = 3; A%7f;&x!
public final static int SHELL = 4; hW/Ve'x[
public final static int QUICK = 5; (i1x<
public final static int IMPROVED_QUICK = 6; WHOX<YJs
public final static int MERGE = 7; Iz-mUD0;
public final static int IMPROVED_MERGE = 8; Q<g>WNb
public final static int HEAP = 9; /Hq
'1xhP}'3)
public static void sort(int[] data) { 7fO<=ei:
sort(data, IMPROVED_QUICK); I"x~ 7
} A>e-eD xi
private static String[] name={ ,6pGKCUU:y
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" [^bq?w
}; JR xY#k
\=[j9'N>
private static Sort[] impl=new Sort[]{ NP.i,H
new InsertSort(), t+q;}ZvG
new BubbleSort(), 0!KYi_3
new SelectionSort(), MEJX5qG6m
new ShellSort(), *RVCz|0%w
new QuickSort(), *5*#Z~dut8
new ImprovedQuickSort(), rFkZ'rp74b
new MergeSort(), $pAVTz
new ImprovedMergeSort(), L6i|5 P
new HeapSort() k~K;r8D/
}; S:`Gi>D
0sH~yvM5
public static String toString(int algorithm){ |HYST`
return name[algorithm-1]; %6rSLBw3
} %G,7Ul1f
:) -`
public static void sort(int[] data, int algorithm) { QG~6mvD
impl[algorithm-1].sort(data); j}s/)}n|
} .taP2^2Z
d=8.cQL:E
public static interface Sort { :TR:tf
public void sort(int[] data); qsXkm4
} <_Z.fdUA
={ -kQq
public static void swap(int[] data, int i, int j) { -sZ'<(3
int temp = data; Fw{#4
data = data[j]; dT% eq7=
data[j] = temp; BBGub?(dR
} +F60_O `
} .boBb<