[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; g*AWE,%=|
} @Md/Q~>
int i1=l; w3ResQ
int i2=mid+1; hn GZ=
for(int cur=l;cur<=r;cur++){ z#wkiCRYm
if(i1==mid+1) gD@){Ip
data[cur]=temp[i2++]; ]m3HF&
else if(i2>r) e8a+2.!&\
data[cur]=temp[i1++]; Mk 6(UXY
else if(temp[i1] data[cur]=temp[i1++]; z\W64^'"Z
else Q~ w|#
data[cur]=temp[i2++]; -l*|M(N\
} i>`%TW:g
} MAR'y8I
~Fcm[eoC
} +5*95-;0
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改进后的归并排序: s2V:cMXFn
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package org.rut.util.algorithm.support; b{&)6M)zo
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import org.rut.util.algorithm.SortUtil; %YscBG
IFL*kB
/** NH4#
* @author treeroot <)H9V-5aZ
* @since 2006-2-2 b2Fe<~S{
* @version 1.0 oJz^|dW
*/ @Cyvf5|bL
public class ImprovedMergeSort implements SortUtil.Sort { 1.GQau~
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private static final int THRESHOLD = 10; j</: WRA`]
.|70;
/* =8. ,43+
* (non-Javadoc) kgP0x-Ap
* )7Wf@@R'F
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) UB@+ck
*/ 904}Jh,
public void sort(int[] data) { KkbDW3-
int[] temp=new int[data.length]; r`d4e,(
mergeSort(data,temp,0,data.length-1); 8OU\V5i[,q
} FTUv IbT
eq;uO6[
private void mergeSort(int[] data, int[] temp, int l, int r) { {4Cmu;u
int i, j, k; 8cIKvHx
int mid = (l + r) / 2; 1>h]{%I
if (l == r) $%#!bV
return; f2`2,?
if ((mid - l) >= THRESHOLD) ]{@-HTt
mergeSort(data, temp, l, mid); c-5)QF) z
else 3F2w-+L
insertSort(data, l, mid - l + 1); bWU'cw
if ((r - mid) > THRESHOLD) tT_\i6My
mergeSort(data, temp, mid + 1, r); \_f(M|
else ]N?kG`[
insertSort(data, mid + 1, r - mid); m;QMQeGz
9WyhZoPD*
for (i = l; i <= mid; i++) { @*((1(q
temp = data; lRFYx?y
} )Ql%r?(F+
for (j = 1; j <= r - mid; j++) { /*mI<[xb
temp[r - j + 1] = data[j + mid]; E:nF$#<'N
} lt8|9"9<
int a = temp[l]; )+DmOsH
int b = temp[r]; kt:! 7
for (i = l, j = r, k = l; k <= r; k++) { [7Oe3=
if (a < b) { uKHxe~
data[k] = temp[i++]; }o`76rDN
a = temp; Rima;9.Y0
} else { [{,1=AB
data[k] = temp[j--]; L4nYXW0y
b = temp[j]; MQ8J<A Pf-
} 6j}9V L77
} 0 kW,I
} }.6[qk
wf<M)Rs|
/** &tj!*k'
* @param data Q*Pq{]0K
* @param l Ysv" 6b}
* @param i i9x+A/o[
*/ .$vK&k
private void insertSort(int[] data, int start, int len) { +6+i!Sip
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); G4"F+%.
} fz "Y CHe
} H qx-;F~0
} F:S}w
} O:K2Y5R?B
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堆排序： _H@DLhH|=
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package org.rut.util.algorithm.support; 7@W>E;go
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import org.rut.util.algorithm.SortUtil; cw <l{A
nX8v+:&}
/** N"ST@/j.A
* @author treeroot 2D5StCF$O
* @since 2006-2-2 U]rRQ d/:;
* @version 1.0 ]7A'7p$Y
*/ \s\?l(ooq"
public class HeapSort implements SortUtil.Sort{ ?}Y]|c^W
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/* (non-Javadoc) _lq`a\7e
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2GG2jky{/
*/ S3J^,*'
public void sort(int[] data) { I7]8Y=xf
MaxHeap h=new MaxHeap(); , W?VhO
h.init(data); j1<Yg,_.p
for(int i=0;i h.remove(); <:CkgR$/{
System.arraycopy(h.queue,1,data,0,data.length); ~wdGd+ez
} M"L=L5OH-
+lTq^4
private static class MaxHeap{ Dw"\/p:-3
%(Icz?
void init(int[] data){ 'Pbr v
this.queue=new int[data.length+1]; 6!bsM"F
for(int i=0;i queue[++size]=data; #O&8A
fixUp(size); gRzxLf`K
} !8b^,
} N2o7%gJw
#\ErY3k6&
private int size=0; dc'Y`e
^B^9KEjTz
private int[] queue; F"mmLao
A@u@ift
public int get() { 5bb(/YtFy
return queue[1]; NxILRKwO
} !<F3d`a
w32y3~
public void remove() { q,%st~
SortUtil.swap(queue,1,size--); CvdN"k
fixDown(1); 2~2 O V
} /mZE/>&~,
file://fixdown 2Khv>#l
private void fixDown(int k) { !<h)w#>en
int j; ugBCBr
while ((j = k << 1) <= size) { l+b~KU7~l
if (j < size %26amp;%26amp; queue[j] j++; {4PwLCy
if (queue[k]>queue[j]) file://不用交换 hqdDm
break; D6Wa.,r
SortUtil.swap(queue,j,k); +cRn%ioVi
k = j; HbIF^LeY|R
} VtohL+
} 6dYMwMH
private void fixUp(int k) { y)<q/
while (k > 1) { R|Q?KCI&
int j = k >> 1; k;W XB|k
if (queue[j]>queue[k]) 5-A\9UC*@
break; |[y6Ua0
SortUtil.swap(queue,j,k); y_[vr:s5pG
k = j; S|}L&A
} Ea=P2:3*
} 8b=_Y;
##ANrG l
} >-c8q]()ly
K> e7pu
} !_(Tqyg&
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SortUtil： g\AY|;T
BJ0?kX@
package org.rut.util.algorithm; paMa+jhQQ
WEpoBP CL
import org.rut.util.algorithm.support.BubbleSort; Hx:;@_gq
import org.rut.util.algorithm.support.HeapSort; B/C,.?Or
import org.rut.util.algorithm.support.ImprovedMergeSort; [/ZO q
import org.rut.util.algorithm.support.ImprovedQuickSort; J=yTbSN\v
import org.rut.util.algorithm.support.InsertSort; nj4/#W
import org.rut.util.algorithm.support.MergeSort; g,Y/M3>(
import org.rut.util.algorithm.support.QuickSort; BerwI 7!=
import org.rut.util.algorithm.support.SelectionSort; |cY`x(?yP
import org.rut.util.algorithm.support.ShellSort; &.ACd+Cd
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/** w#J2 wS
* @author treeroot ?%kV?eu'
* @since 2006-2-2 NuI9iU
* @version 1.0 I2DpRMy
*/ DL.!G
public class SortUtil { B?wq=DoG
public final static int INSERT = 1; y?!"6t7&
public final static int BUBBLE = 2; Q=:|R3U/
public final static int SELECTION = 3; :H[6Lg\*
public final static int SHELL = 4; <6=c,y
public final static int QUICK = 5; SY8C4vb'h
public final static int IMPROVED_QUICK = 6; 9ll~~zF99|
public final static int MERGE = 7; t>sE x:
public final static int IMPROVED_MERGE = 8; P>6{&(
public final static int HEAP = 9; 4/)k)gLI
tI{_y
public static void sort(int[] data) { =":,.Ttq41
sort(data, IMPROVED_QUICK); bN88ua}k{
} 59-c<I/}f
private static String[] name={ L4f3X~8,b
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" &~w}_Fjk
}; DeYV$W B
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private static Sort[] impl=new Sort[]{ &-=5Xc+Z
new InsertSort(), 07$o;W@
new BubbleSort(), d5l UGRg
new SelectionSort(), Xry47a )
new ShellSort(), .[ mRM
new QuickSort(), $mB;K]m
new ImprovedQuickSort(), s9d_GhT%-
new MergeSort(), 6aV_@no.C
new ImprovedMergeSort(), v9UD%@tZ
new HeapSort() abEmRJTmW
}; m4yL@d,Yw
Y4(
public static String toString(int algorithm){ -`t^7pr
return name[algorithm-1]; bYPKh
} ;S*}WqP,
8sCv]|cn
public static void sort(int[] data, int algorithm) { ei{eTp4HpV
impl[algorithm-1].sort(data); VD\=`r)nT
} 4'Zp-k?5`
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public static interface Sort { K_-MYs.
public void sort(int[] data); <d_!mKw
} E+JqWR5
NgCvVWto
public static void swap(int[] data, int i, int j) { 2 Vrw
int temp = data; PiYxk+N
data = data[j]; OBAi2Vw
data[j] = temp; w+{LAS
} #C3.Jef
} JO<wU