[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; 0dwD ?GG2
} ^JxVs 7
int i1=l; 6/cm TT$i
int i2=mid+1; w(bvs&`{uC
for(int cur=l;cur<=r;cur++){ F7<M{h5s
if(i1==mid+1) +On2R&m
data[cur]=temp[i2++]; imADjBR]
else if(i2>r) 1CJ1-]S(3
data[cur]=temp[i1++]; Lf9s'o}.R
else if(temp[i1] data[cur]=temp[i1++]; z2V ->UK)
else ^N7cXK*
data[cur]=temp[i2++]; Srw`vql{(
} "d-vs t5
} 5dv|NLl
1;m?:|6K{
} AM?ZhM
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改进后的归并排序: k@fxs]Y_L
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package org.rut.util.algorithm.support; Z<|x6%
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import org.rut.util.algorithm.SortUtil; vV"YgN:
.K^gh$z!
/** q>%.zc[x
* @author treeroot rui 8x4c
* @since 2006-2-2 BT(eU*m-
* @version 1.0 ,r3`u2)
*/ EQoK\.; G~
public class ImprovedMergeSort implements SortUtil.Sort { I.t)sf,
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private static final int THRESHOLD = 10; ,MHK|8!
1WaQWZ:=
/* dgQ<>+9]6
* (non-Javadoc) @[FO;4w
* iaMl>ua
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) t(UBs-t
*/ z*VK{O)o
public void sort(int[] data) { 6GAEQ]
int[] temp=new int[data.length]; Y, Lpv|
mergeSort(data,temp,0,data.length-1); WTD86A
} y+^KVEw
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private void mergeSort(int[] data, int[] temp, int l, int r) { ~9YEb
int i, j, k; ?pQ0* O0
int mid = (l + r) / 2; 'ym Mu}q
if (l == r) DQ$m@_/4w
return; l^tRy_T:-
if ((mid - l) >= THRESHOLD) Z[!kEW
mergeSort(data, temp, l, mid); a"}ndrc*
else ]/p>p3@1C
insertSort(data, l, mid - l + 1); pQZ`dS\
if ((r - mid) > THRESHOLD) !`H!!Kg0L
mergeSort(data, temp, mid + 1, r); c;KMox/
else ,WsG,Q(K
insertSort(data, mid + 1, r - mid); guCCu2OTA%
4<<eqxI$|
for (i = l; i <= mid; i++) { Wf?[GO
temp = data; ?W dY{;&
} KWYjN h#*
for (j = 1; j <= r - mid; j++) { C5KUIOg
temp[r - j + 1] = data[j + mid]; kg(}%Ih
} asQ^33g z
int a = temp[l]; modem6#x'
int b = temp[r]; ',Z]w;D!G
for (i = l, j = r, k = l; k <= r; k++) { Z @DDuVr
if (a < b) { 5l,Lp'k
data[k] = temp[i++]; >C{8}Lg-.
a = temp; 6*1f -IbV
} else { $? Z}hU
data[k] = temp[j--]; .LM|@OeaD!
b = temp[j]; _`*G71PS
} c8zok `\P_
} ifWQwS/,a
} "J&WH~8+N
TrgKl2xfx
/** m1K4_a)^[
* @param data Z6So5r%wZ
* @param l /&qE,>hd.+
* @param i YHgNL LZ?
*/ o*~=NoR
private void insertSort(int[] data, int start, int len) { O<AGAD
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); <v\$r2C*
} Jz0AYiCq
} _/ 5
} =(R3-['QIb
} mWP&N#vwh
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堆排序： <RbsQ^U
^VnnYtCRz
package org.rut.util.algorithm.support; lkp$rJ#6
`.~*pT*u
import org.rut.util.algorithm.SortUtil; zDm3$P=
E&"V~
/** 00>knCe6
* @author treeroot aU.!+e%_
* @since 2006-2-2 EpT^r8I
* @version 1.0 8B "^}y\0
*/ &\ad.O/Q
public class HeapSort implements SortUtil.Sort{ U.Z5;E0:
0Bkc93
/* (non-Javadoc) 5)rN#_BKj
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) zt
*/ ;S&anC#E
public void sort(int[] data) { 2H] 7=j
MaxHeap h=new MaxHeap(); FUL'=Xo
h.init(data); ^P.U_2&
for(int i=0;i h.remove(); ".pQM.T
System.arraycopy(h.queue,1,data,0,data.length); 1=X1<@*
} qx0F*EH|
A[F@rUZp
private static class MaxHeap{ 0a!|*Z
W8-vF++R
void init(int[] data){ t3v_o4`&
this.queue=new int[data.length+1]; s`yg?CR`,
for(int i=0;i queue[++size]=data; mYk~ ]a-
fixUp(size); |~v2~
} ]XX>h~0
} {EVy.F
[_KOU2
private int size=0; zTq"kxn'
%5n'+-XVj
private int[] queue; %Yg|QBm|
_Wp.s]D [
public int get() { " w /Odd
return queue[1]; 4,=;:#n,J
} ZBQ@S
1bDXv,nD
public void remove() { pz{ ]O_px
SortUtil.swap(queue,1,size--); &:}WfY!hX
fixDown(1); J9J/3O Q=
} xlsAct:
file://fixdown I2)2'j,B
private void fixDown(int k) { 4T~wnTH0Xg
int j; SoFl]^l
while ((j = k << 1) <= size) { [CAFh:o
if (j < size %26amp;%26amp; queue[j] j++; xNRMI!yv
if (queue[k]>queue[j]) file://不用交换 wq8&2(|Fc
break; jnM}N:v
SortUtil.swap(queue,j,k); LXth-j=]
k = j; d<m.5ECC}
} #oR@!?
} fgA-+y
private void fixUp(int k) { ]T.+(\I
while (k > 1) { rzvKvGd#N
int j = k >> 1; 0q]0+o*%
if (queue[j]>queue[k]) L)9Z Op5
break; 9.9B#?
SortUtil.swap(queue,j,k); q(2ZJn13f
k = j; ?O]RQXsZ2
} X]W(
} uA t{WDHm
(bB"6 #TI
} e)XnS'
3m&
} {DUtdu[
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SortUtil： R`Hy0;X
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package org.rut.util.algorithm; 8WKY 4nkj
^HE@ [b
import org.rut.util.algorithm.support.BubbleSort; Z@>kqJ%
import org.rut.util.algorithm.support.HeapSort; s+=':Gcb(C
import org.rut.util.algorithm.support.ImprovedMergeSort; f)r6F JLU
import org.rut.util.algorithm.support.ImprovedQuickSort; 50T^V`6
import org.rut.util.algorithm.support.InsertSort; _S-@|9\&#
import org.rut.util.algorithm.support.MergeSort; Qte%<POx+
import org.rut.util.algorithm.support.QuickSort; QTN'yd?WE
import org.rut.util.algorithm.support.SelectionSort; f'M([gn^_
import org.rut.util.algorithm.support.ShellSort; `UqX`MFz
rP!GS _RG
/** 5IF$M2j
* @author treeroot Krl9O]H/[
* @since 2006-2-2 7 Z? Hyv
* @version 1.0 uZI7,t-7
*/ cHOC>|
public class SortUtil { $ 1m}lXk
public final static int INSERT = 1; T)ISDK4>S"
public final static int BUBBLE = 2; M[Nv>
public final static int SELECTION = 3; 4_$.gO
public final static int SHELL = 4; K7nyQGS
public final static int QUICK = 5; > +00[T
public final static int IMPROVED_QUICK = 6; @:>gRD
public final static int MERGE = 7; ~zWLqnS}
public final static int IMPROVED_MERGE = 8; hp2$[p6O
public final static int HEAP = 9; h b8L[ 4
{:Kr't<XzF
public static void sort(int[] data) { #k)t.P Q
sort(data, IMPROVED_QUICK); k;qWiYMV
} 3 4&xh1=3
private static String[] name={ ~sq@^<M)s
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" f=S2O_Ee
}; _,d<9 Y)
&rl;+QS
private static Sort[] impl=new Sort[]{ roBb8M|q
new InsertSort(), ~_g{P3
new BubbleSort(), ojA!!Ru
new SelectionSort(), 64>CfU(
new ShellSort(), #5{BxX&\
new QuickSort(), L1y71+iqU
new ImprovedQuickSort(), E\p"%
new MergeSort(), =+q\Jh
new ImprovedMergeSort(), 4:/^.:
new HeapSort() |f.,fVVV;
}; $TK= :8HY
9b@yDq3hQ
public static String toString(int algorithm){ TZ!@IBu
return name[algorithm-1]; Z/|=@gpw
} :3b02}b7
t`>Z#=cl\
public static void sort(int[] data, int algorithm) { yO*
impl[algorithm-1].sort(data); 5OX[)Li
} !+QfQghAT
8%xBSob{j
public static interface Sort { 1-&L-c.
public void sort(int[] data); fc[_~I'
} }6=)w@v
A5%$<
public static void swap(int[] data, int i, int j) { ,H^!G\
int temp = data; brlbJFZ19
data = data[j]; $J&c1
data[j] = temp; hhFO,
} 5K)_w:U X
} /H3w7QU