[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=1M<dL
} 6?3f+=e"~!
int i1=l; z[I3k
int i2=mid+1; `;9Z?]}`
for(int cur=l;cur<=r;cur++){ mXH\z
if(i1==mid+1) q)ns ui(
data[cur]=temp[i2++]; nKzS2u=:Y
else if(i2>r) @,Iyn<v{B
data[cur]=temp[i1++]; `bJ+r)+5
else if(temp[i1] data[cur]=temp[i1++]; #Wz7ju;
else w)hH8jx{
data[cur]=temp[i2++]; &ZRriqsQg
} EC4RA'Bg1k
} ~P47:IZf
i@C1}o-/
} Oz[]]`C1
SeC[,
改进后的归并排序: &z@~n
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package org.rut.util.algorithm.support; Vu/{Hr
C#r1zr6
import org.rut.util.algorithm.SortUtil; Y|NANjEAfm
s 9Y'MQo*
/** ;e>pu"#
* @author treeroot o-))R| ~z
* @since 2006-2-2 e7(iMe
* @version 1.0 OUd&fUmH
*/ DO#!ce
public class ImprovedMergeSort implements SortUtil.Sort { f+/AD
|Mj2lZS
private static final int THRESHOLD = 10; R3;,EL{H&
FG^Jh5
/* fR&;E
* (non-Javadoc) 6,707h
* b6FC
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `n*e8T
*/ V5MLzW\8
public void sort(int[] data) { %q~YJ*\
int[] temp=new int[data.length]; e-Xr^@M*Q
mergeSort(data,temp,0,data.length-1); =peodj^
} fr\"MP
ID-Y*
private void mergeSort(int[] data, int[] temp, int l, int r) { J\kGD
int i, j, k; RZtY3:FBx|
int mid = (l + r) / 2; B~[QmK
if (l == r) ]Cfjs33H
return; pQGlg[i2/
if ((mid - l) >= THRESHOLD) f(^? PGO
mergeSort(data, temp, l, mid); 4pin\ZS:C
else P;V$%r`yD
insertSort(data, l, mid - l + 1); X#bK.WN$
if ((r - mid) > THRESHOLD) m+t<<5I[-
mergeSort(data, temp, mid + 1, r); F ka^0
else (9#$za>
insertSort(data, mid + 1, r - mid); |L@&plyB-
00?_10x)
for (i = l; i <= mid; i++) { aDV~T24
temp = data; )Oxsasn)M
} /E/Z0<l7
for (j = 1; j <= r - mid; j++) { W:s>?(6?
temp[r - j + 1] = data[j + mid]; ~]MACG:'
} $Z{ap
int a = temp[l]; n#2tFuPE
int b = temp[r]; Dsl,(qm5
for (i = l, j = r, k = l; k <= r; k++) { 0^H"eQO
if (a < b) { vn]e`O>y
data[k] = temp[i++]; MY8[)<q"
a = temp; <6 HrHw_
} else { 9;\a|8O
data[k] = temp[j--]; (R.l{(A
b = temp[j]; K@JGGgrE`!
} kBh*@gf
} ~HFqAOr
} ;;^OKrzWW
mW/6FC
/** [MQU~+]
* @param data <}\!FuC
* @param l V<:)bG4;d
* @param i F9Hxqa#1T
*/ f,jN"
private void insertSort(int[] data, int start, int len) { \jkMnS6FvL
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ?06+"Z
} SBf8Ipe
} 9!``~]G2
} x1@`\r#0
} u8w4e!rKo6
`X["Bgk$!T
堆排序： MO_-7,.y
%kHeU=
package org.rut.util.algorithm.support; 0eGz|J*7
wM-I*<L>
import org.rut.util.algorithm.SortUtil; 5~,/VV
DOsQVdH
/** T{A_]2 G
* @author treeroot agbG)t0
* @since 2006-2-2 aUGRFK_6$
* @version 1.0 E*sQ|" g
*/ TrYt(F{t
public class HeapSort implements SortUtil.Sort{ 0r=KY@D
'lsG?
/* (non-Javadoc) L[D<e?j
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) wWI1%#__|o
*/ kH.W17D~
public void sort(int[] data) { Vr<eU>W
MaxHeap h=new MaxHeap(); U.$7=Zl8t
h.init(data); m0}1P]dc
for(int i=0;i h.remove(); 0qCx.<"p8#
System.arraycopy(h.queue,1,data,0,data.length); ?2q;`Nb
} PnUYL.v
!_No\O
private static class MaxHeap{ R0WI s:k2
)S8fFV
void init(int[] data){ l_ES$%d
this.queue=new int[data.length+1]; 1ti9FQ
for(int i=0;i queue[++size]=data; 2C@ui728
fixUp(size); <o aVI?
} Vx~N`|yY
} #:)yh]MP
V-7A80!5
private int size=0; RBA{!
CJ~gE"
private int[] queue; URo#0fV4C
zrazbHI
public int get() { ,rU>)X
return queue[1]; ;X zfd
} U2DE zr
Z ? F*Z0y
public void remove() { (6Y.|u]bq
SortUtil.swap(queue,1,size--); EOn[!
fixDown(1); Pf,lZU?f
} ]\.3<^
file://fixdown 3G.-JLhs
private void fixDown(int k) { k-;A9!^h
int j; f]*TIYicc
while ((j = k << 1) <= size) { eyIbjgpV
if (j < size %26amp;%26amp; queue[j] j++; PCcI(b>?l
if (queue[k]>queue[j]) file://不用交换 Lj,!025
break; ?xT ^9
SortUtil.swap(queue,j,k); C)RJjaOr
k = j; ds#om2)
} ol7^T
} TwT@_~IM
private void fixUp(int k) { <y!(X"n`
while (k > 1) { .szc-r{
int j = k >> 1; /7o{%~O
if (queue[j]>queue[k]) H!81Pq~
break; V49[XX
SortUtil.swap(queue,j,k); p(8[n^~,i
k = j; "%?$BoJR0
} FRR`<do5$,
} { ML)F]]
}u `~lw(Z
} ;+Mee^E>!
^h5h kIx0
} 'ZXd|WI
)_H>d<di
SortUtil： -Z<V?SFOK
q qFN4AO
package org.rut.util.algorithm; qQ/<\6Sl
"c2{n,
import org.rut.util.algorithm.support.BubbleSort; ]tnf<5x
import org.rut.util.algorithm.support.HeapSort; h%[1V
import org.rut.util.algorithm.support.ImprovedMergeSort; DQ{"6-
import org.rut.util.algorithm.support.ImprovedQuickSort; @krh<T6|
import org.rut.util.algorithm.support.InsertSort; U'Mxf'q
import org.rut.util.algorithm.support.MergeSort; nu<kx
import org.rut.util.algorithm.support.QuickSort; H2iC? cSR
import org.rut.util.algorithm.support.SelectionSort; 7K`Z<v&*
import org.rut.util.algorithm.support.ShellSort; _enS_R
$;Nw_S@
/** 9u^yEqG`
* @author treeroot Y *?hA'
* @since 2006-2-2 J^xIfV~zt
* @version 1.0 f.{/PL
*/ &~MM\,KML
public class SortUtil { l(j._j~p
public final static int INSERT = 1; }^"#&w3<
public final static int BUBBLE = 2; ysDGF@wZC
public final static int SELECTION = 3; KM&bu='L^
public final static int SHELL = 4; 8_h:_7e
public final static int QUICK = 5; !gX(Vh*k
public final static int IMPROVED_QUICK = 6; DFvj
public final static int MERGE = 7; } >zl
public final static int IMPROVED_MERGE = 8; &f_ua)cyY
public final static int HEAP = 9; ` &{
11Y4oS
public static void sort(int[] data) { s<b(@L 1
sort(data, IMPROVED_QUICK); 9_&N0>OF
} U3rpmml
private static String[] name={ TMAart;<
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 3zsjL=ta
}; 032PR;]
A` )A=L
private static Sort[] impl=new Sort[]{ eZ`x[g%1
new InsertSort(), $:!L38[7$
new BubbleSort(), FS^ie|8{D-
new SelectionSort(), _WB*ArR
new ShellSort(), Cu-z`.#}R
new QuickSort(), ^>/] Qi
new ImprovedQuickSort(), u[b0MNE~
new MergeSort(), h5p,BRtu
new ImprovedMergeSort(), `ZELw=kLL
new HeapSort() nR#'BBlI
}; f`Wces=5
YLkdT%
public static String toString(int algorithm){ y|h:{<
return name[algorithm-1]; vIpitbFC
} \ x>#bql+
227 Z6#CF!
public static void sort(int[] data, int algorithm) { 3Jj 3!aDB
impl[algorithm-1].sort(data); ^oH!FN`;{
} Fb^f`UI
k.K;7GZC
public static interface Sort { &:}}T=@M1
public void sort(int[] data); ^QbaMX
} M?G4k]
-xMM}r y
public static void swap(int[] data, int i, int j) { @mRda%qR
int temp = data; v#ERXIrf
data = data[j]; M7. fz"M
data[j] = temp; 1Uf8ef1,
} m>8tA+K)+)
} 1WJ%n;