[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; [m~b[ZwES
} fr8Xoa%1=
int i1=l; H":/Ckok
int i2=mid+1; .6\T`6H=a
for(int cur=l;cur<=r;cur++){ 7*+Km'=M
if(i1==mid+1) YkSuwx@5_q
data[cur]=temp[i2++]; r])Z9bbi
else if(i2>r) nHrP>zN
data[cur]=temp[i1++]; :_>\DJ'>
else if(temp[i1] data[cur]=temp[i1++]; KA`0g=
else [}{w
data[cur]=temp[i2++]; 9X!ET!
} h8em\<;
} [.{^"<Z<
Vre=%bGw
} dAL0.>|`0
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改进后的归并排序: Kl2}o|b
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package org.rut.util.algorithm.support; :lNg:r$4
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import org.rut.util.algorithm.SortUtil; PXa5g5!
s\6N }[s
/** p Z"o@';!
* @author treeroot p=2zS.
* @since 2006-2-2 =D{B}=D\IM
* @version 1.0 Dh2#$[/@1
*/ 3Hs$]nQ_X
public class ImprovedMergeSort implements SortUtil.Sort { kzMa+(fu
w nWgy4:
private static final int THRESHOLD = 10; j+$M?Z^
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/* b9`iZ
* (non-Javadoc) Jth=.9mrM
* `(3SfQ-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ooY\t +
*/ aQga3;S!
public void sort(int[] data) { %?Rs*-F.~1
int[] temp=new int[data.length]; 4e}{$s$Xx
mergeSort(data,temp,0,data.length-1); *vb^N0P
} `n6/ A)
Yhe+u\vGs\
private void mergeSort(int[] data, int[] temp, int l, int r) { "2%>M
int i, j, k; sA3UeTf
int mid = (l + r) / 2; k'g$2
if (l == r) p<q].^M
return; AfN&n= d K
if ((mid - l) >= THRESHOLD) <8f(eP\*F
mergeSort(data, temp, l, mid); u %'y_C3
else QGXQ{
insertSort(data, l, mid - l + 1); B "*`R!y
if ((r - mid) > THRESHOLD) `v~!H\q
mergeSort(data, temp, mid + 1, r); $Y6 3!*
else V`by*s
insertSort(data, mid + 1, r - mid); #XcU{5Qm5
-/zp&*0gcx
for (i = l; i <= mid; i++) { -]/7hN*v
temp = data; A])OPqP{
} O"\nR:\
for (j = 1; j <= r - mid; j++) { Cw%BZ
temp[r - j + 1] = data[j + mid]; RE 9nU%!
} %Z7%jma
int a = temp[l]; fSjs?zd`
int b = temp[r]; l~rb]6E
for (i = l, j = r, k = l; k <= r; k++) { oKRFd_r+
if (a < b) { alc]
data[k] = temp[i++]; +ZclGchw
a = temp; "?P[9x}
} else { L@nebT;\'
data[k] = temp[j--]; {M[~E|@D
b = temp[j]; ^Z#@3=
} , |l@j%
} wYjQV?,
} #sZIDn J#
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/** &Xv1[nByU
* @param data ]rnXNn;
* @param l {\EOo-&A
* @param i J,(7.+`~#
*/ 0aogBg_@K
private void insertSort(int[] data, int start, int len) { mL$f[
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); v77fQ0w3
} S7CV w,2
} 'l|R5
} FN!1|'VK
} -TTs.O8P|<
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堆排序： E?cZbn*>`
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package org.rut.util.algorithm.support; 1Cv#nhmp
84^[/d;!
import org.rut.util.algorithm.SortUtil; E MQ4yK
dMV=jJ%Y
/** bK4&=#Zh
* @author treeroot x,\!DLq:p
* @since 2006-2-2 q$T8bh,2
* @version 1.0 4sIXO
*/ NI.`mc6Xd
public class HeapSort implements SortUtil.Sort{ {fU?idY)c
*T1~)z}j<
/* (non-Javadoc) y(}Eko4u5
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \2>?6zs
*/ nvt$F%+
public void sort(int[] data) { Xm|ib%no
MaxHeap h=new MaxHeap(); h55>{)(E
h.init(data); MwAJ(
for(int i=0;i h.remove(); 8teJ*sz
System.arraycopy(h.queue,1,data,0,data.length); .YR8v1Cp
} 'I v_mig
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private static class MaxHeap{ 4,~tl~FD
a$$ Wt<&Y
void init(int[] data){ QPs:RhV7
this.queue=new int[data.length+1]; [7.agI@=
for(int i=0;i queue[++size]=data; YE\K<T jH
fixUp(size); '$[Di'*;
} `Mk4sKU\a
} ")%r}:0
[!~}S
private int size=0; q@ZlJ3%l,
M{E{NK
private int[] queue; NXI[q'y
hcyO97@r
public int get() { .S7:;%qL6
return queue[1]; "SR5wr
} [PWL<t::c
6/1$<!WH
public void remove() { V`bs&5#Sx
SortUtil.swap(queue,1,size--); ehT%s+aUw
fixDown(1); 7ZsA5%s=,
} -DCa
file://fixdown Y(r@v
private void fixDown(int k) { n8u*JeN
int j; !ni>\lZ
while ((j = k << 1) <= size) { ]JMl|e
if (j < size %26amp;%26amp; queue[j] j++; =~jAoOC@
if (queue[k]>queue[j]) file://不用交换 p`P~i&_
break; pbLGe'
SortUtil.swap(queue,j,k); d~Mg vh'
k = j; i_ QcC
} BJ5}GX!
} BQ#L+9%
private void fixUp(int k) { jg_n7
while (k > 1) { @Y-TOCadT
int j = k >> 1; 0^&!6R
if (queue[j]>queue[k]) 2|{V,!/cvG
break; l r~gG3
SortUtil.swap(queue,j,k); N wtg%;
k = j; `@XehSQ
} Wi$dZOcSJ
} cj g.lzYH
.Dw,"VHP
} ~xDw*AC-
c-8!#~M(
} z<&m*0WYA
Lh ap4:
SortUtil： /!T> b:0
R#eg^7HfX
package org.rut.util.algorithm; CDdkoajBa
-^SA8y
import org.rut.util.algorithm.support.BubbleSort; |/T43ADW
import org.rut.util.algorithm.support.HeapSort; ?KP}#>Ba@
import org.rut.util.algorithm.support.ImprovedMergeSort; 7bF*AYM
import org.rut.util.algorithm.support.ImprovedQuickSort; Y7SacRO
import org.rut.util.algorithm.support.InsertSort; CdZ BG
import org.rut.util.algorithm.support.MergeSort; v\%G|8+]
import org.rut.util.algorithm.support.QuickSort; ?WFh',`:
import org.rut.util.algorithm.support.SelectionSort; |vu>;*K
import org.rut.util.algorithm.support.ShellSort; i9m*g*"2
b$-e\XB!
/** YI@Fhr &NU
* @author treeroot s 3r=mp{
* @since 2006-2-2 o2uj =Gnx
* @version 1.0 z$[C#5+2
*/ FxRXPt FK
public class SortUtil { r;gP}H ?
public final static int INSERT = 1; y%cO#P@
public final static int BUBBLE = 2; -F1- e+=
public final static int SELECTION = 3; (OmH~lSO.
public final static int SHELL = 4; k \qiF|B)Z
public final static int QUICK = 5; e@n!x}t8
public final static int IMPROVED_QUICK = 6; L?RF;jf
public final static int MERGE = 7; nE|@IGH
public final static int IMPROVED_MERGE = 8; Em^(
public final static int HEAP = 9; yL1CZ_
q_t4OrLr=
public static void sort(int[] data) { ?c#$dc"
sort(data, IMPROVED_QUICK); ,pt%) c
} 8;"*6vHZ
private static String[] name={ (^n*Am;zlH
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Q@QFV~
}; s;1h-Oq(
:&w{\-0{
private static Sort[] impl=new Sort[]{ `<fh+*
new InsertSort(), +j[oEI`e
new BubbleSort(), OB^Tq~i
new SelectionSort(), PQ U]l"A
new ShellSort(), ,)fkr]`<
new QuickSort(), \2kPq>hu
new ImprovedQuickSort(), ^g>1U5c
new MergeSort(), x\@*60o
new ImprovedMergeSort(), z@VP:au
new HeapSort() L,]=vba'$
}; Tg ?x3?kw
Hs(D/&6%
public static String toString(int algorithm){ .v\\Tq&"|
return name[algorithm-1]; ~;#MpG;e
} "!UVs+)]
R;}22s
public static void sort(int[] data, int algorithm) { yR71%]*.
impl[algorithm-1].sort(data); =A!S/;z>
} [L~@uAMw:
K%j&/T j1
public static interface Sort { vO@s$qi
public void sort(int[] data); -kj< 1~YW
} b~0N^p[&%
.tXtcf/
public static void swap(int[] data, int i, int j) { {}Ejt:rKN
int temp = data; E]} n(
data = data[j]; .dmi#%W
data[j] = temp; l!~ mxUb
} $2#7D* Rx
} SpSnoVI