[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; j$?{\iXZ
} C-\S/yd
int i1=l; AlAYiUw{
int i2=mid+1; 9}PhN<Gd
for(int cur=l;cur<=r;cur++){ i*/Yz*<
if(i1==mid+1) f;W|\z'
data[cur]=temp[i2++]; 7?GIS '
else if(i2>r) 8B\2Zfe
data[cur]=temp[i1++]; ^,/RO5
else if(temp[i1] data[cur]=temp[i1++]; .k%[4:Fe
else ?4q4J8j
data[cur]=temp[i2++]; ;[=8B\?
} BqD'8zLD
} ^j31S*f&:
+^=8ge}
} L"o>wYx
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改进后的归并排序: Z -W(l<
>[*8I\*@n
package org.rut.util.algorithm.support; Y@N,qHtz
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import org.rut.util.algorithm.SortUtil; O(D~_O.
2O.i\cH
/** { g/0x,-Z
* @author treeroot h*w%jdQ6
* @since 2006-2-2 &#!4XOyB
* @version 1.0 925|bX6I
*/ }BZ"S-hZ
public class ImprovedMergeSort implements SortUtil.Sort { C71qPb|$R
E4|jOz^j4\
private static final int THRESHOLD = 10; w5Ay)lz
l49*<nkmq
/* .Le?T&_
* (non-Javadoc) ]n_ k`
* GO`Ru 8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >8WP0Qx/
*/ ]:4*L
public void sort(int[] data) { IC1NKn<k
int[] temp=new int[data.length]; 2+QYhdw
mergeSort(data,temp,0,data.length-1); i rU 6D
} Y }$/e
kEOS{C%6R
private void mergeSort(int[] data, int[] temp, int l, int r) { Jk7|{W\OA
int i, j, k; {`LU+
int mid = (l + r) / 2; Sjvdirr
if (l == r) 1.D,W1s
return; :N4t49i
if ((mid - l) >= THRESHOLD) Z4S!NDMm~
mergeSort(data, temp, l, mid); ~<_2WQ/$
else *h!28Ya(~
insertSort(data, l, mid - l + 1); r+":'/[x
if ((r - mid) > THRESHOLD) rH_\d?b
mergeSort(data, temp, mid + 1, r); nqI@Y)
else eg(6^:z?f
insertSort(data, mid + 1, r - mid); jQ2Ot<
Pv_Jm
for (i = l; i <= mid; i++) { 9N@W\DT
temp = data; &O9 |#YUq
} H`1{_
for (j = 1; j <= r - mid; j++) { W+UfGk}A
temp[r - j + 1] = data[j + mid]; 0ZZZoPo
} %E#s\B,w
int a = temp[l]; _ba>19csq%
int b = temp[r]; #gz M|
for (i = l, j = r, k = l; k <= r; k++) { 9$cWU_q{
if (a < b) { [@J/eWB
data[k] = temp[i++]; X-6de>=
a = temp; $c0h.t
} else { ok!L.ac
data[k] = temp[j--]; '*5i)^
b = temp[j]; _F>CBG
} Qw-~>d
} QEz?w}b*
} dIN$)?aB0
{1UQ/_
/** b\yXbyjZ3.
* @param data 06O2:5zF
* @param l JMrEFk
* @param i SxOC1+Oy
*/ N5Q[nd
private void insertSort(int[] data, int start, int len) { c3jx+Q
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ,\_1w
} ,K9*%rW)
} WI-&x '
} % tS,}ze
} 2oVSn"
O(fM?4w
堆排序： 7gf05Z'=
\-h%O jf4
package org.rut.util.algorithm.support; `uOT+B%R
\MyLc/Gh5
import org.rut.util.algorithm.SortUtil; 11o.c;
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/** 'u*DA|HC
* @author treeroot yv t.
* @since 2006-2-2 ]A~WIF
* @version 1.0 [<n2Uz7MP
*/ (}Z@R#njH
public class HeapSort implements SortUtil.Sort{ */sS`/Lx
ojcA<60 '
/* (non-Javadoc) 8aK)#tNWN
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [tlI!~Z
*/ '(U-(wTC'/
public void sort(int[] data) { Q# ~Q=T'<
MaxHeap h=new MaxHeap(); _K]_ @Ivh
h.init(data); |2O]R s
for(int i=0;i h.remove(); 24 [+pu
System.arraycopy(h.queue,1,data,0,data.length); f(/lLgI(
} 6 Q%jA7
fObg3S92
private static class MaxHeap{ v- 2:(IV
`=4r+
void init(int[] data){ e>6y%v;
this.queue=new int[data.length+1]; dBYmiF!+
for(int i=0;i queue[++size]=data; wjHzE
fixUp(size); g%sluT[#
} C'9Cr}cZ.
} ??^5;P{yx
GWZ }7ake
private int size=0; uxXBEq;
@5N]ZQ9
private int[] queue; smlpD3?va
;rF\kX&Jh
public int get() { 2;k*@k-t
return queue[1]; h;p>o75O
} <c2E'U)X
MI/MhkS ?
public void remove() { 94h]~GqNi
SortUtil.swap(queue,1,size--); fz|cnU
fixDown(1); IHB}`e|
} XW[j!`nlk
file://fixdown 7I&&bWB
private void fixDown(int k) { s2h@~y
int j; J[l7di5
while ((j = k << 1) <= size) { qX/y5F`
if (j < size %26amp;%26amp; queue[j] j++; (/=f6^}
if (queue[k]>queue[j]) file://不用交换 MLXNZd
break; GZEc l'h*
SortUtil.swap(queue,j,k); fT;s-v[`k
k = j; nEJq_
} L{X_^
} qB5j;@r
private void fixUp(int k) { gqZ'$7So
while (k > 1) { y&6FybIz
int j = k >> 1; F0GxH?
if (queue[j]>queue[k]) zNs55e.rx
break; `.E[}W
SortUtil.swap(queue,j,k); X3{G:H0\p
k = j; yQU{zY
} m4**~xfC
} bp* ^z,w
\d6C%S!
} +[M6X} TQ
[A~y%bI"
} i`(XLi}k
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SortUtil： DVG(Vw
N:S/SZI
package org.rut.util.algorithm; |z9*GY6RU
ZGBd%RWjG_
import org.rut.util.algorithm.support.BubbleSort; ZT'`hK_up
import org.rut.util.algorithm.support.HeapSort; M||+qd W!
import org.rut.util.algorithm.support.ImprovedMergeSort; *{YlN}vA
import org.rut.util.algorithm.support.ImprovedQuickSort; Bc(Y(X$PK
import org.rut.util.algorithm.support.InsertSort; 6"wlg!k8
import org.rut.util.algorithm.support.MergeSort; /z4$gb7Y
import org.rut.util.algorithm.support.QuickSort; WYHQ?
import org.rut.util.algorithm.support.SelectionSort; X.OD`.!>
import org.rut.util.algorithm.support.ShellSort; q8FTi^=Kb
? E1<!~
/** 7S-ys+
* @author treeroot MDnKX?Y
* @since 2006-2-2 RmI]1S_=
* @version 1.0 <lgYcdJ
*/ u8'Zl8g
public class SortUtil { xqeyD*s
public final static int INSERT = 1; 02f~En}>6
public final static int BUBBLE = 2; 4QH3fTv
public final static int SELECTION = 3; !02`t4Zc-
public final static int SHELL = 4; ~Y`ldL
public final static int QUICK = 5; ,`|3KE9
public final static int IMPROVED_QUICK = 6; y<?kzt
public final static int MERGE = 7; 0g +7uGp:
public final static int IMPROVED_MERGE = 8; Z~AO0zUKY
public final static int HEAP = 9; AS!?q
n4s+>|\M
public static void sort(int[] data) { ./-5R|fN
sort(data, IMPROVED_QUICK); Q!o'}nA
} -C;^3R[ O
private static String[] name={ m!gz3u]rN
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" wVX[)E\J
}; 9{'N{
aAZZ8V
private static Sort[] impl=new Sort[]{ }{,^@xdyW
new InsertSort(), FTX=Wyr
new BubbleSort(), n3T>QgK
new SelectionSort(), <Q3oT
new ShellSort(), cbNTj$'b2u
new QuickSort(), F5LuSy+v
new ImprovedQuickSort(), l>2E (Y|
new MergeSort(), $~~Jw]
new ImprovedMergeSort(), ls_'')yp
new HeapSort() cL-[ZvyVX
}; }QN1|mP2
JUsQ,ETn
public static String toString(int algorithm){ ~d o9;8v
return name[algorithm-1]; Sj-n;F|=X
} spGb!Y`mR
c-x,fS"&W
public static void sort(int[] data, int algorithm) { 61,;Uc\T
impl[algorithm-1].sort(data); ?274uAO'
} L(/e&J@><
/1Qr#OJ(]
public static interface Sort { &VhroHO
public void sort(int[] data); BTlk Etm
} NiNM{[3oS
p?{Xu4(
public static void swap(int[] data, int i, int j) { .sxcCrQE
int temp = data; O)C\vF#
data = data[j]; zE336
data[j] = temp; N"pc,Q\xU
} H~oail{EQ
} xj<Rp|7&