[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; e3~{l~Rb
} h,]VWG
int i1=l; [)~1Lu
int i2=mid+1; v}d)uPl};
for(int cur=l;cur<=r;cur++){ G'PZ=+!XO/
if(i1==mid+1) }*xjO/Ey
data[cur]=temp[i2++]; "d0=uHd5\
else if(i2>r) ?# _{h
data[cur]=temp[i1++]; nhjT2Sl
else if(temp[i1] data[cur]=temp[i1++]; C])s'XTs
else N)R5#JX
data[cur]=temp[i2++]; *L$_80
} fFr9]
} k{N!}%*2
7}6CUo
} ms&1P
+{V`{'
改进后的归并排序: v~x4Y,m%
OHsA]7S
package org.rut.util.algorithm.support; #RaqNu
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import org.rut.util.algorithm.SortUtil; *KY:U&*
xz.Jmv
/** m|c[C\)By
* @author treeroot #vga qe9
* @since 2006-2-2 :Q]"dbY^
* @version 1.0 NlKVl~_ C
*/ ^7YNM<_%@
public class ImprovedMergeSort implements SortUtil.Sort { )Se$N6u-
m;MJ{"@A'
private static final int THRESHOLD = 10; Z${eDl6i
gBcs
/* ; teM^zyI
* (non-Javadoc) ]S[?tn
* 0F/[GZ<k
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Bdb}4X rL
*/ iRlZWgj4^
public void sort(int[] data) { ~"SQwE|
int[] temp=new int[data.length]; Y7r;}^+WY
mergeSort(data,temp,0,data.length-1); }l[e@6r F
} seBmhe5qR
LSJ.pBl\X
private void mergeSort(int[] data, int[] temp, int l, int r) { 4_U"M@
int i, j, k; dgoAaS2M
int mid = (l + r) / 2; OoH-E.lp
if (l == r) W.jXO"pN
return; .O5V;&,
if ((mid - l) >= THRESHOLD) m:[I$b6AY
mergeSort(data, temp, l, mid); Q[rZ1z
else H)7v$A,5%
insertSort(data, l, mid - l + 1); ID,_0b
if ((r - mid) > THRESHOLD) 9,`i[Dzp
mergeSort(data, temp, mid + 1, r); rVoV@,P
else T>rmm7F
insertSort(data, mid + 1, r - mid); V@#oQi*
PDuBf&/e
for (i = l; i <= mid; i++) { % _E?3
temp = data; ~o"=4q`>
} d-+jb<C&
for (j = 1; j <= r - mid; j++) { 3-{BXht)
temp[r - j + 1] = data[j + mid]; 4dPTrBQ?
} n{sk
int a = temp[l]; &|#[.ti1
int b = temp[r]; xwof[BnEZ
for (i = l, j = r, k = l; k <= r; k++) { N\g=9o|Q
if (a < b) { L#byYB;E{
data[k] = temp[i++]; *S:~U
a = temp; 89(qU
} else { 6` TwP\!$/
data[k] = temp[j--]; Z}uY%]
b = temp[j]; )-Hs]D:
} }" vxYB!h3
} wb?k
} ge GhM>G
[=q/f2_1.
/** =N\; ?eF(
* @param data D48e30
* @param l ?8"*B^*Sh
* @param i 9>S)*lU&s
*/ -GPJ,S V>
private void insertSort(int[] data, int start, int len) { Nyy&'\`!
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); jo<xrn\
} HC6U_d1-6
} EXr2d"
} #[{{&sN
} EpMxq7*
>U{iof<
堆排序： /)Cfm1$ic
VbvP!<8
package org.rut.util.algorithm.support; T3{~f
/h+ W L
import org.rut.util.algorithm.SortUtil; },l i'r#p
\j`0f=z_
/** <lf692.3
* @author treeroot $e7%>*?m
* @since 2006-2-2 BKg8p]`+
* @version 1.0 .s*N1 U?h
*/ `K.C>68
public class HeapSort implements SortUtil.Sort{ x'x5tg
xj>P5\mW#
/* (non-Javadoc) fe/;U=te
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .b3h?R*&
*/ JVX)>2&$
public void sort(int[] data) { h{^v756L
MaxHeap h=new MaxHeap(); >80k5$t
h.init(data); : x&R'wX-
for(int i=0;i h.remove(); Gc`PO
System.arraycopy(h.queue,1,data,0,data.length); W<X3!zuKSg
} )tI^2p{
&<98nT
private static class MaxHeap{ V&nB*U&s"
SZ9Oz-?
void init(int[] data){ :$b`n
this.queue=new int[data.length+1]; *zrGrk:l
for(int i=0;i queue[++size]=data; {S{%KkAV
fixUp(size); rzAf {2
} m1pA]}Y/5o
} @-dGZ5
9m)$^U>oz
private int size=0; Hp=BnN
-a)1L'R
private int[] queue; A r]*?:4y[
;^xM" {G8
public int get() { $C7a#?YF,
return queue[1]; +Pl)E5W!=`
} :6nD"5(
&Uam4'B6-
public void remove() { bQautRW
SortUtil.swap(queue,1,size--); HXKM<E{j
fixDown(1); 6T$=(I <4
} ,yltt+e
file://fixdown AyO%,6p[
private void fixDown(int k) { i#*[, P~
int j; KBB)xez8
while ((j = k << 1) <= size) { e^O:I
if (j < size %26amp;%26amp; queue[j] j++; F;ttqL
if (queue[k]>queue[j]) file://不用交换 x*vD^1"'P
break; ~ps,U
SortUtil.swap(queue,j,k); 'r]6 GC8Z$
k = j; Z8$BgP
} (uvQ/!
} }( F:U#
private void fixUp(int k) { z;1dMQ,#
while (k > 1) { T$D(Y`zdn
int j = k >> 1; D5c 8sB
if (queue[j]>queue[k]) "Wg,]$IvU
break; :1*E5pX0n
SortUtil.swap(queue,j,k); $VHIU1JjZ
k = j; -orRmn6}
} %@vF%
} 2X\Pw
?A|JKOst]
} wPM>-F
6AJk6W^Z
} jlj ge=#c2
RlL]p`g
SortUtil： l'(FM^8jv
[y9a.*]u/@
package org.rut.util.algorithm; .gg0rTf=-
6U !P8q
import org.rut.util.algorithm.support.BubbleSort; l%EvXdZuOy
import org.rut.util.algorithm.support.HeapSort; DSwb8q
import org.rut.util.algorithm.support.ImprovedMergeSort; X=whZ\EZ
import org.rut.util.algorithm.support.ImprovedQuickSort; AE77i,Xa
import org.rut.util.algorithm.support.InsertSort; N4ZV+ |
import org.rut.util.algorithm.support.MergeSort; ({j8|{)+
import org.rut.util.algorithm.support.QuickSort; ?2&= +QaT
import org.rut.util.algorithm.support.SelectionSort; dHIk3j-!
import org.rut.util.algorithm.support.ShellSort; T<0r,
HQP.7.w7 5
/** Li6|c*K'
* @author treeroot MMFg{8
* @since 2006-2-2 G*N[tw
* @version 1.0 `Qo37B2
*/ Mm@G{J\\
public class SortUtil { |)!f".`
public final static int INSERT = 1; .3C::~:
public final static int BUBBLE = 2; qqw P4ceG
public final static int SELECTION = 3; ,kJ7c;:i
public final static int SHELL = 4; >O\+9T@
public final static int QUICK = 5; +u Iq]tqe
public final static int IMPROVED_QUICK = 6; kC.!cPd
public final static int MERGE = 7; u$R5Q{H_
public final static int IMPROVED_MERGE = 8; 5c]:/9&
public final static int HEAP = 9; $97O7j@
/8e}c`
public static void sort(int[] data) { cRf F!EV
sort(data, IMPROVED_QUICK); X~jdOaq{F:
} c`xNTr01
private static String[] name={ G"?7 Z&+
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" *eoH"UFYQ#
}; U/enq,-F^
0]SWyC :
private static Sort[] impl=new Sort[]{ ikc1,o
new InsertSort(), ~QbHp|g
new BubbleSort(), P_5aHeiJ
new SelectionSort(), qhY+<S9
new ShellSort(), wL8ji>"
new QuickSort(), $L= Dky7
new ImprovedQuickSort(), /7D5I\
new MergeSort(), .JLJ(WM
new ImprovedMergeSort(), *gwaW!=
new HeapSort() 44*#qLN
}; @6G)(NGD
OY{fxBb
public static String toString(int algorithm){ ;"nO'wN:h
return name[algorithm-1]; >"2jCR$/
} i-wRwl4aEF
!-}Q{<2@W
public static void sort(int[] data, int algorithm) { I9Ohz!RQ
impl[algorithm-1].sort(data); IVh5SS
} /GGyM]k3
QWOPCoUet
public static interface Sort { <5E'`T
public void sort(int[] data); ch8VJ^%Ra1
} 4uiq'-
i6V$mhL
public static void swap(int[] data, int i, int j) { 6#U~>r/
int temp = data; !tTv$L>
data = data[j]; ~frsgHW
data[j] = temp; 68z#9}
} Sqn>L`Lz
} ?IAu,s*u