[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; %aNm j)L
} <Z%=lwtX
int i1=l; ,\6Vb*G|E>
int i2=mid+1; 712nD ?>
for(int cur=l;cur<=r;cur++){ G`FYEmD
if(i1==mid+1) I}_}VSG(
data[cur]=temp[i2++]; BY~Tc5
else if(i2>r) vIRT$W' O}
data[cur]=temp[i1++]; Ey:68yU
else if(temp[i1] data[cur]=temp[i1++]; tB4mhX|\
else $P{`-Y }a
data[cur]=temp[i2++]; ~$u9
} }:2##<"\t
} ^m#tWb)f
T[SK>z
} )$!b`u
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改进后的归并排序: kO\ O$J^S
LI%dJ*-V
package org.rut.util.algorithm.support; t5+p]7
Y1h)aQ5{
import org.rut.util.algorithm.SortUtil; a?-&O$UHf\
6k t,q0
/** zFjz%:0
* @author treeroot .P1WY
* @since 2006-2-2 Yj@Sy
* @version 1.0 Xfk DMh
*/ xh2r?K@k>
public class ImprovedMergeSort implements SortUtil.Sort { y >=Y
uN)c!='I
private static final int THRESHOLD = 10; o-rX4=T
bG]0|
/* 1d< b\P0
* (non-Javadoc) %6 *c40
* Z<;W*6J
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) N (4H}2
*/ ~2Wus8X-
public void sort(int[] data) { #Nh'1@@
int[] temp=new int[data.length]; EnWv9I<
mergeSort(data,temp,0,data.length-1); )95k3xo
} q\@Zf}
G%I .u
private void mergeSort(int[] data, int[] temp, int l, int r) { 2fTuIS<yr
int i, j, k; 86=W}eV1r
int mid = (l + r) / 2; blQ&QQL
if (l == r) i%FC lMF
return; MDF_Xr-hZ
if ((mid - l) >= THRESHOLD) O(/~cQ
mergeSort(data, temp, l, mid); }&vD(hX
else bny5e:= d
insertSort(data, l, mid - l + 1); *\XOQWrF
if ((r - mid) > THRESHOLD) I;w!
mergeSort(data, temp, mid + 1, r); E<jajYj
else Lng. X8D
insertSort(data, mid + 1, r - mid); GNJ/|9
^.6yzlY
for (i = l; i <= mid; i++) { !Vyf2xS"
temp = data; )h,yQ`.
} )NZH{G
for (j = 1; j <= r - mid; j++) { v Z9OJrF
temp[r - j + 1] = data[j + mid]; WK6,K92
} IB;yL/T
int a = temp[l]; ?z.?(xZ 6
int b = temp[r]; !`e`4y*N
for (i = l, j = r, k = l; k <= r; k++) { 5!?5S$>
if (a < b) { e6taQz@}
data[k] = temp[i++]; "B{3q`(
a = temp; Q'n+K5&p
} else { 23tX"e
data[k] = temp[j--]; `^[k8Z(
b = temp[j]; oMEW5.VX
} 0''p29
} P\MDD@
} Q` &#u#
?+Gt?-! 5q
/** &b|RoPV
* @param data )c4tGT<
* @param l YD[HBF)~j
* @param i 5[4wN( )
*/ qHub+"2
private void insertSort(int[] data, int start, int len) { tBGLEeL/.
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); `TPIc
} U\P4ts
} $rXCNew(
} bW=q G
} i9L]h69r
4z(~)#'^
堆排序： b1?^9c#0d
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package org.rut.util.algorithm.support; T#qf&Q Z
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import org.rut.util.algorithm.SortUtil; W\~ie}D{
M)#9Q=<
/** qob!AU|
* @author treeroot ZR\N~.
* @since 2006-2-2 C7dq=(p&
* @version 1.0 Q#3}AO
*/ @4y?XL(n
public class HeapSort implements SortUtil.Sort{ 4MPy}yT*
^y@ W\
/* (non-Javadoc) $U?]^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) svmb~n&x6
*/ Ef`'r))
public void sort(int[] data) { zwV!6xG
MaxHeap h=new MaxHeap(); \ UrD%;sq
h.init(data); 08xo_Oysq
for(int i=0;i h.remove(); ?XY'<]o E
System.arraycopy(h.queue,1,data,0,data.length); KdkL_GSLT
} R5ra*!|L)
~2k.x*$
private static class MaxHeap{ )vO"S
5@xR`g-
void init(int[] data){ oT\K P
this.queue=new int[data.length+1]; Ga5s9wC
for(int i=0;i queue[++size]=data; q\<l"b z
fixUp(size); %nkP" Z#
} Z5'^81m$o
} ~ L4NK#
yzK<yvN
private int size=0; %Lh%bqGz
le \f:
private int[] queue; trDw|WA
!Wr<T!T
public int get() { uZL]mwkj]
return queue[1]; 4m<]qw
} Bug.>ln1
G{[w+ObX
public void remove() { k( Sda>-
SortUtil.swap(queue,1,size--); e#/&A5#Ya
fixDown(1); QwX81*nx
} Zy+ERaF|]
file://fixdown jVnTpa!A
private void fixDown(int k) { 8vuTF*{yZ
int j; o6A$)m5V
while ((j = k << 1) <= size) { hM]Z T5;<
if (j < size %26amp;%26amp; queue[j] j++; H/{@eaV
if (queue[k]>queue[j]) file://不用交换 A{s-g>s
break; t[TM\j0jW
SortUtil.swap(queue,j,k); iQ" LIeD
k = j; 3g4=as4w
} _S{TjGZ&
} OpaRQ=
private void fixUp(int k) { ~+1mH
while (k > 1) { KfjWZ4{v
int j = k >> 1; _+48(QF<
if (queue[j]>queue[k]) ht%qjE
break; Az@@+?,%Y
SortUtil.swap(queue,j,k); X[$h &]
k = j; he~8V.$
} $\ZWQct
} fJ8>nOh
Q`*U U82!
} 9KX% O-'
B(M-;F
} `F/R:!v
E "=4(
SortUtil： +#,J`fV%
8$~oiK%fw
package org.rut.util.algorithm; @ovaOX
7V5c`:"
import org.rut.util.algorithm.support.BubbleSort; eHvUgDt
import org.rut.util.algorithm.support.HeapSort; l8?C[,K%
import org.rut.util.algorithm.support.ImprovedMergeSort; :jv(-RTI
import org.rut.util.algorithm.support.ImprovedQuickSort; FQ0&{ulb
import org.rut.util.algorithm.support.InsertSort; QD0x^v8
import org.rut.util.algorithm.support.MergeSort; KWo Ps%G
import org.rut.util.algorithm.support.QuickSort; R{c~jjd
import org.rut.util.algorithm.support.SelectionSort; LC]0c)v#
import org.rut.util.algorithm.support.ShellSort; /4(HVua
=!L}/Dl
/** }kt%dDU
* @author treeroot P@@MQ[u?!.
* @since 2006-2-2 JL4E`
* @version 1.0 C:No ^nH>
*/ zV}:~;w
public class SortUtil { ~E6sY
public final static int INSERT = 1; 8TpYt)]S
public final static int BUBBLE = 2; ((`\i=-o5
public final static int SELECTION = 3; )&T 5/+
public final static int SHELL = 4; 1Z ~C3)T=
public final static int QUICK = 5; ?jz\[0)s
public final static int IMPROVED_QUICK = 6; WD\Yx~o
public final static int MERGE = 7; m4~ |z
public final static int IMPROVED_MERGE = 8; '1DY5`i{
public final static int HEAP = 9; oF$#7#0`;8
jywS<9c@
public static void sort(int[] data) { 3!F^vZ.
sort(data, IMPROVED_QUICK); zwC ,,U
} 5{(4%
private static String[] name={ .+S%hT,v6i
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 3ux7^au
}; ^Lb\k|U,\
2'=)ese
private static Sort[] impl=new Sort[]{ eV!(a8
new InsertSort(), ! 7V>gWhR
new BubbleSort(), H_@6!R2
new SelectionSort(), DNZ,rL:h
new ShellSort(), 1|8Bv0-b
new QuickSort(), b;D
new ImprovedQuickSort(), 7yu-xnt3s
new MergeSort(), B?&0NpVD
new ImprovedMergeSort(), W#!AZ!
new HeapSort() WYF8?1dt +
}; tXA?[ S
\dU.#^ryp
public static String toString(int algorithm){ 9IXy96]]6
return name[algorithm-1]; 8nBYP+t,e
} #Hr'plg 8
.aO6Y+Y
public static void sort(int[] data, int algorithm) { yKUxjb^b\
impl[algorithm-1].sort(data); 4G:~|N.{p
} o5J6Xi0+
i. )^}id
public static interface Sort { ].d%R a:{
public void sort(int[] data); 517"x@6Q
} cZ)JvU9]
'^m'r+B"
public static void swap(int[] data, int i, int j) { Ps.xY;Y
int temp = data; G^ k8Or2
data = data[j]; z*.G0DFw
data[j] = temp; 423%K$710
} cvy 5|;-u
} LhKbZoPp