[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; $]O;D~
} zE$KU$
int i1=l; zq\YZ:JC
int i2=mid+1; (prqo1e@
for(int cur=l;cur<=r;cur++){ 5>{
if(i1==mid+1) &)Y26*(`
data[cur]=temp[i2++]; rZ}y'A
else if(i2>r) lU6?p")F1
data[cur]=temp[i1++]; 8JYF0r7
else if(temp[i1] data[cur]=temp[i1++]; Wl!|+-
else }AdA? :7A
data[cur]=temp[i2++]; aNn\URR
} Y*oT(
} kC~\D?8E=
W!.F\H,(
} g?Jx99c;
-n.ltgW@
改进后的归并排序: 9a4Xf%!F>z
E=PmOw7b
package org.rut.util.algorithm.support; gKyYBr
ey4RKk,
import org.rut.util.algorithm.SortUtil; jN.'%5Q?H
+v$,/~$tI
/** 0|mF /
* @author treeroot ib$_x:OO"
* @since 2006-2-2 1$1s0yg
* @version 1.0 jV:Krk6T<
*/ rK^Sn7U
public class ImprovedMergeSort implements SortUtil.Sort { |Dz$OZP
1D@'uApi.
private static final int THRESHOLD = 10; `|9NxF+
btb$C
/* w0`aW6t#
* (non-Javadoc) 70sb{)
* yWsJa)e3*@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) h?cf)L
*/ 55aJ=T
public void sort(int[] data) { os<YfMM<:/
int[] temp=new int[data.length]; >b6!*Lrhs
mergeSort(data,temp,0,data.length-1); a!OS2Tz:
} q#}#A@Rg
bLSZZfq
private void mergeSort(int[] data, int[] temp, int l, int r) { sR(or=ub~
int i, j, k; ;;A8*\*$
int mid = (l + r) / 2; '*`25BiQ
if (l == r) l'Oz-p.@
return; }@+3QHwYU
if ((mid - l) >= THRESHOLD) ar+ j`QIe
mergeSort(data, temp, l, mid); M|HW$8V3_2
else :K-05$K
insertSort(data, l, mid - l + 1); !|\$|m<n
if ((r - mid) > THRESHOLD) Rv-`6eyAA
mergeSort(data, temp, mid + 1, r); D's Tv}P
else WAd5,RZ?
insertSort(data, mid + 1, r - mid); .?<M$38fv
tBJCfM
for (i = l; i <= mid; i++) { ](^$5Am
temp = data; nU^-D1s{
} REEs}88);'
for (j = 1; j <= r - mid; j++) { !xqy6%p
temp[r - j + 1] = data[j + mid]; T/m4jf2
} df85g
int a = temp[l]; %A]?5J)Bi
int b = temp[r]; [i"6\p&
for (i = l, j = r, k = l; k <= r; k++) { o7_*#5rD
if (a < b) { g?TPRr~$9
data[k] = temp[i++]; c >8IM
a = temp; ( o(,;
} else { n8FmIoZ&`
data[k] = temp[j--]; Za"m;+H<E
b = temp[j]; X-lB1uq^
} sf7~hN*
} j3W)
} \/wbk`2
-2D/RE7|
/** u0o}rA
* @param data d ynq)lf
* @param l B IW?/^
* @param i >TKl`O
*/ ?3duW$`
private void insertSort(int[] data, int start, int len) { oJ:\8>)9
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); s%6{X48vY^
} O4+a[82
} j\LJ{?;jC
} g,k} nkIT
} /QgU!:e
I:l/U-b7h
堆排序： _nn\O3TB
6r]l8*34;
package org.rut.util.algorithm.support; ><HHO (74X
ji&%'h
import org.rut.util.algorithm.SortUtil; "p"M9P'
\]Nt-3|`0
/** gP13n!7
* @author treeroot r@30y/C
* @since 2006-2-2 qQ{i2D%)?f
* @version 1.0 -(;<Q_'s{"
*/ &{R]v/{p]
public class HeapSort implements SortUtil.Sort{ x%`.L6rj
Vlf=gP
/* (non-Javadoc) R'z -#*[
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) m"|AD/2;(
*/ V,?BVt
public void sort(int[] data) { +lNAog
MaxHeap h=new MaxHeap(); N t-8[J
h.init(data); %&81xAt
for(int i=0;i h.remove(); .Bs~FIe^
System.arraycopy(h.queue,1,data,0,data.length); tsWzM9Yf
} aGx[?}=
2@jlF!zC
private static class MaxHeap{ ssUm1F\
-]-?>gkN5
void init(int[] data){ 0;X0<IV
this.queue=new int[data.length+1]; uJ:SN;
for(int i=0;i queue[++size]=data; !]l!I9
fixUp(size); g-NfZj?
} x3C^S~
} "b6ew2\
L>X39R~
private int size=0; ln&9WF\I
VM"z6@
private int[] queue; [7+dZL[
|Ev VS
public int get() { >=VtL4K^
return queue[1]; "l7))>lL
} SJd,l,Gg)
:h!&.FB
public void remove() { mcm8|@Y{
SortUtil.swap(queue,1,size--); f{j.jfl\x
fixDown(1); l6y*SW5+
} kfQi}D'a
file://fixdown IuOY.c2.u
private void fixDown(int k) { _rIFwT1]
int j; >"%}x{|
while ((j = k << 1) <= size) { vN8Xq+
if (j < size %26amp;%26amp; queue[j] j++; j{:>"6
if (queue[k]>queue[j]) file://不用交换 9?i~4&EY
break; *0!IHr"fn
SortUtil.swap(queue,j,k); snccDuS
k = j; bPhbd
} W4V !7_
} zZ})$Ny(
private void fixUp(int k) { XL2iK)A
while (k > 1) { pU)g93
int j = k >> 1; RLL2'8"A
if (queue[j]>queue[k]) `xm4?6
break; o9 g0fC
SortUtil.swap(queue,j,k); P{{U
k = j; 4&a,7uVer
} 4Px
} ?=^M(TA;
%yJ $R2%*y
} f6O5k8n
dLnu\bSF
} Zyx92z9Y
{ kF"<W
SortUtil： qL1d-nH
VfON{ 1g
package org.rut.util.algorithm; =3= $F%
:4'Fq;%C
import org.rut.util.algorithm.support.BubbleSort; gXThdNU4G
import org.rut.util.algorithm.support.HeapSort; Qk_`IlSd
import org.rut.util.algorithm.support.ImprovedMergeSort; wg0hm#X
import org.rut.util.algorithm.support.ImprovedQuickSort; .dStV6
import org.rut.util.algorithm.support.InsertSort; o7B}~;L
import org.rut.util.algorithm.support.MergeSort; Wgr`)D
import org.rut.util.algorithm.support.QuickSort; H.R7,'9
import org.rut.util.algorithm.support.SelectionSort; `*to( )
import org.rut.util.algorithm.support.ShellSort; !(L\X'jH
#ekz>/Im*
/** }M+2 ,#l
* @author treeroot IQ3]fLb
* @since 2006-2-2 eKj'[2G@/
* @version 1.0 UvPD/qu$8D
*/ u>U4w68
public class SortUtil { KE k]<b=
public final static int INSERT = 1; LNR~F_64Q
public final static int BUBBLE = 2; Er]lObfQo
public final static int SELECTION = 3; v7kR]HU[y
public final static int SHELL = 4; .xIu
public final static int QUICK = 5; u^{6U(%
public final static int IMPROVED_QUICK = 6; 3jG #<4;J
public final static int MERGE = 7; acdWU"<
public final static int IMPROVED_MERGE = 8; /Wqx@#
public final static int HEAP = 9; m=7Z8@sX},
<y30t[.E6
public static void sort(int[] data) { -Ze{d$
sort(data, IMPROVED_QUICK); ".=LzjE<gv
} 9*lkx#
private static String[] name={ \h&ui]V
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" zJJ6"9sl
}; B,Gt6cUq
ZJ7<!?6
private static Sort[] impl=new Sort[]{ $^1L|KgXp
new InsertSort(), 4\6-sL?rW
new BubbleSort(), nfV32D|3
new SelectionSort(), 7?O~3
new ShellSort(), EC6Q<&]Iw
new QuickSort(), \f AL:mJ
new ImprovedQuickSort(), k'd(H5A
new MergeSort(), O!c b-
new ImprovedMergeSort(), RXj6L~vs5_
new HeapSort() u VZouw#
}; ZSu0e%
E9yBa=#*c
public static String toString(int algorithm){ )E2^G)J$W
return name[algorithm-1]; |4F3Gu
} BRx`83CK
bxS+ R\
public static void sort(int[] data, int algorithm) { :gNTQZR
impl[algorithm-1].sort(data); FrXh\4C
} 2+Tu"oG;rB
8?S)>-mwv
public static interface Sort { %qM3IVPK)q
public void sort(int[] data); nv9kl Q@
} J"x M[c2
gDmwJr
public static void swap(int[] data, int i, int j) { r9a?Y!(
int temp = data; :.+?v*%;n
data = data[j]; v=~=Q*\l
data[j] = temp; INyakAmJ}-
} B`/cKfg
} :V%XEN)