[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; hE;BT>_dn
} G-5ezVli
int i1=l; `Hd~H
int i2=mid+1; $fG~;`T
for(int cur=l;cur<=r;cur++){ 4nKlW_{,
if(i1==mid+1) I8VCR8q
data[cur]=temp[i2++]; )wCV]TdF
else if(i2>r) NE+ ;<mW
data[cur]=temp[i1++]; z4 KKt&
else if(temp[i1] data[cur]=temp[i1++]; rkn'1M&u
else N `[ ?db-%
data[cur]=temp[i2++]; Y7<(_p7
} #sM*<2vj
} DhN<e7c`
K[l5=)G0L
} 3M5wF6nY[[
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改进后的归并排序: qkBCI,X_Y
GuKiNYI_
package org.rut.util.algorithm.support; `NCH^)
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import org.rut.util.algorithm.SortUtil; U3BhoD#f\
2#R8}\
/** _*CbtQb5
* @author treeroot 3u[5T|D'
* @since 2006-2-2 6&_K;
* @version 1.0 rY295Q
*/ \nU_UH
public class ImprovedMergeSort implements SortUtil.Sort { a LJ d1Q
Ww=b{lUD
private static final int THRESHOLD = 10; 6/.cS4
q,>4#J[2;s
/* @bZ,)R
* (non-Javadoc) @k)[p+)E
* YRu#JYti
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,$Xhwr
*/ uLSuY}K0
public void sort(int[] data) { Y=Om0=v
int[] temp=new int[data.length]; /]-a 1
mergeSort(data,temp,0,data.length-1); \WxBtpbQB
} |>KOlwh5n
.p(%gmOp#
private void mergeSort(int[] data, int[] temp, int l, int r) { f7:}t+d
int i, j, k; ;lf$)3%[
int mid = (l + r) / 2; lPw`KW
if (l == r) k(M(]y_
return; @4=Az1W*
if ((mid - l) >= THRESHOLD) {!^0j{T
mergeSort(data, temp, l, mid); #Ve@D@d[
else 7yUX]95y8
insertSort(data, l, mid - l + 1); .+&M,% x
if ((r - mid) > THRESHOLD) yaPx=^&
mergeSort(data, temp, mid + 1, r); d fSj= 4
else 1u~a*lO}
insertSort(data, mid + 1, r - mid); 5em*9Ko
j7~Rw"(XQc
for (i = l; i <= mid; i++) { e?+&2zMq
temp = data; QypUBf
} #'BPW<Ob
for (j = 1; j <= r - mid; j++) { /xCX. C
temp[r - j + 1] = data[j + mid]; P DwBSj
} jmF)iDvjuZ
int a = temp[l]; PxA OKUpI
int b = temp[r]; +#9 4X)*
for (i = l, j = r, k = l; k <= r; k++) { E_\V^
if (a < b) { KpT=twcK
data[k] = temp[i++]; rp=Y }
a = temp; w%-S5#
} else { h!?rk|
data[k] = temp[j--]; |IDZMd0
b = temp[j]; r!~6.
} WWT1_&0
} i&j]FX6q
} q^h/64F
7G%:ckg
/** [DvQk?,t
* @param data o8~<t]Ejw
* @param l $E}N`B7
* @param i \LM.>vJ
*/ >L433qR
private void insertSort(int[] data, int start, int len) { ~.CmiG.7
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); %e(DPX
} YT6dI"48
} US\h,J\Ju
} XrI$@e*
} \-8aTF
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堆排序： rTqGtmulG
ZFs xsg^r
package org.rut.util.algorithm.support; tac\Ki?
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import org.rut.util.algorithm.SortUtil; kW=!RX[&
/!fJ`pu!
/** gux?P2f
* @author treeroot /@&#U bN\
* @since 2006-2-2 R{pF IyR
* @version 1.0 6FY.kN\
*/ ~_ u3_d.
public class HeapSort implements SortUtil.Sort{ ] !n3j=*
IyAD>Q^
/* (non-Javadoc) Dt(xj}[tC
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) g.\%jDM
*/ U+zntB
public void sort(int[] data) { tG~[E,/`
MaxHeap h=new MaxHeap(); MG~bDM4
h.init(data); <v=s:^;C0
for(int i=0;i h.remove(); y+KAL{AGK
System.arraycopy(h.queue,1,data,0,data.length); e;2A{VsD8
} ;]@Pm<f
'_5|9 }
private static class MaxHeap{ AH_qZTv0{Q
Wb[k2V
void init(int[] data){ ("{"8
this.queue=new int[data.length+1]; wB&5q!{!
for(int i=0;i queue[++size]=data; Q>71uM%e`
fixUp(size); BGHZL~
} h1l%\3ZH
} RC?vU
nLx|$=W
private int size=0; 6OoOkNWF
6b9J3~d\E
private int[] queue; a$Hq<~46
~+ 9vz
public int get() { *eX/ZCn
return queue[1]; M&)\PbMc
} _EJPI
3_`)QYU'
public void remove() { +bT[lJ2O>G
SortUtil.swap(queue,1,size--); X?XB!D7[
fixDown(1); K)5j
} aNA]hl
file://fixdown ]k'^yc{5
private void fixDown(int k) { gA% A})
int j; \BN$WV
while ((j = k << 1) <= size) { { {:Fs
if (j < size %26amp;%26amp; queue[j] j++; C|h Uyo
if (queue[k]>queue[j]) file://不用交换 w*&vH/D
break; Y B,c=Wx
SortUtil.swap(queue,j,k); kW1w;}n$
k = j; @_7rd
} Hp>L}5 y[
} `- (<Q;iO
private void fixUp(int k) { E@yo/S
while (k > 1) { j=Izwt>
int j = k >> 1; +k~0&lZi
if (queue[j]>queue[k]) %M))Ak4~a
break; (w:,iw#
SortUtil.swap(queue,j,k); ;FW <%
k = j; HUAYtUBH
} k61mRO
} ZhoV,/\+
v$w}UC%uf
} Y}:4y$<
P+=m.
} A^#\=ZBg1
;8dffsyq
SortUtil： ;Rpib[m
3W]gn8
package org.rut.util.algorithm; f*xr0l
:0QDV~bs
import org.rut.util.algorithm.support.BubbleSort; T\g+w\N
import org.rut.util.algorithm.support.HeapSort; 'nBP%
import org.rut.util.algorithm.support.ImprovedMergeSort; 1U/RMN3`
import org.rut.util.algorithm.support.ImprovedQuickSort; )RT?/NW
import org.rut.util.algorithm.support.InsertSort; ([}08OW@
import org.rut.util.algorithm.support.MergeSort; 9[;da
import org.rut.util.algorithm.support.QuickSort; }WaZ+Mdg\
import org.rut.util.algorithm.support.SelectionSort; ^i_+ugJX
import org.rut.util.algorithm.support.ShellSort; W`NF40)
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/** i q oXku
* @author treeroot bX,#z,
* @since 2006-2-2 (CY D]n
* @version 1.0 wDGb h=
*/ GZ,MC?W
public class SortUtil { =B5{7g\
public final static int INSERT = 1; N5,LHO
public final static int BUBBLE = 2; mC$y*G
public final static int SELECTION = 3; y_w <3
public final static int SHELL = 4; GqR|hg
public final static int QUICK = 5; {-8Nq`w
public final static int IMPROVED_QUICK = 6; 'Grii,
public final static int MERGE = 7; ge:a{L
public final static int IMPROVED_MERGE = 8; &)gc{(4$
public final static int HEAP = 9; =y_KL
)GAlj;9A$
public static void sort(int[] data) { xr7}@rq"U<
sort(data, IMPROVED_QUICK); JJ%@m;~
} CbC[aVA=
private static String[] name={ /e|Lw4$@S
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" u!5q)>Wt(
}; `[g$EXX
ES AX}uF
private static Sort[] impl=new Sort[]{ 2xflRks
new InsertSort(), ybw\^t
new BubbleSort(), $ P5K
new SelectionSort(), Pd\4hy
new ShellSort(), Fa[^D~$l*
new QuickSort(), )Uy%iE*
new ImprovedQuickSort(), !Q15qvRS
new MergeSort(), *DC/O( 0
new ImprovedMergeSort(), ]& ckq
new HeapSort() lnHY?y7{
}; peBHZJ``RX
#qYgQ<TM!
public static String toString(int algorithm){ ,]7ouH$H}
return name[algorithm-1]; HI 1T
} 7Q9Hk(Z9
OKlR`Vaty
public static void sort(int[] data, int algorithm) { D 5n\h5
impl[algorithm-1].sort(data); dk nM|
} H-+U^@w
fmj}NV&ma
public static interface Sort { n qO*z<
public void sort(int[] data); G)%V 3h
} Um{) ?1
3qf#NJN}
public static void swap(int[] data, int i, int j) { %UrNPk
int temp = data; I`X!M!dB)
data = data[j]; [`b,SX x
data[j] = temp; ]tN)HRk1
} N6"sXwm
} zGR,}v%%