[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; a[#BlH
} 7P(:!ce4-
int i1=l; $(hZw
int i2=mid+1; [)KfRk?};2
for(int cur=l;cur<=r;cur++){ r8E!-r}rno
if(i1==mid+1) DvKMb-*S
data[cur]=temp[i2++]; hD=D5LYAZ
else if(i2>r) KJ |1zCM
data[cur]=temp[i1++]; Va:jMN
else if(temp[i1] data[cur]=temp[i1++]; +<#-52br\
else WV5R$IqY
data[cur]=temp[i2++]; #wcoLCjs)
} wjs7K|PK
} q9Wtu7/
f5eX%FR
} }'JPA&h|
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改进后的归并排序: (yVI<Os{a
VzNH%
package org.rut.util.algorithm.support; dWEx55>,1
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import org.rut.util.algorithm.SortUtil; _=p|"~rN$
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/** 9w|q':<
* @author treeroot NH!!.Z"
* @since 2006-2-2 \wP$"Z}j
* @version 1.0 :>u{BG;=79
*/ SX.v5plhc
public class ImprovedMergeSort implements SortUtil.Sort { qxNV~aK
:JmNy<
private static final int THRESHOLD = 10; )eV]M~K:
KA7nncg;,
/* :nn'>
* (non-Javadoc) D[_2:8
* 16U@o>O
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "@_f>3z
*/ 6kk(FVX
public void sort(int[] data) { +Y+kx"8
int[] temp=new int[data.length]; K!j2AP3
mergeSort(data,temp,0,data.length-1); VEk|lX;2
} w67Pw
C\Rd]P8\
private void mergeSort(int[] data, int[] temp, int l, int r) { OmW|\d PU
int i, j, k; }_S]!AWz
int mid = (l + r) / 2; !{+(oDN
if (l == r) f#?R!pR
return; pE#0949
if ((mid - l) >= THRESHOLD) bk|>a=o3
mergeSort(data, temp, l, mid); B7 T+a
else u<[Y6m
insertSort(data, l, mid - l + 1); >8c9-dTmf
if ((r - mid) > THRESHOLD) 6 [IiJhVL
mergeSort(data, temp, mid + 1, r); ;)*Drk*t,
else 6b0#z#E
insertSort(data, mid + 1, r - mid); :7maN^
tO#y4<
for (i = l; i <= mid; i++) { e |!i1e!
temp = data; Cs<d\"+
} 3Dy.mtP
for (j = 1; j <= r - mid; j++) { *l}q,9iQ-
temp[r - j + 1] = data[j + mid]; F C"dQ
} &( Z8G~h4
int a = temp[l]; :%{8lanO
int b = temp[r]; MQAb8 K:e
for (i = l, j = r, k = l; k <= r; k++) { ^#Shs^#
if (a < b) { dPS}\&1
data[k] = temp[i++]; eD(#zfP/+
a = temp; Q~`n%uYg\{
} else { "&An9H'
data[k] = temp[j--]; XWk^$"
b = temp[j]; J::dY~@
} v vFX\j3
} _d:l1jD
} n@xU5Q
|<OZa;c+
/** hD"Tjd` P
* @param data t>^An:xT
* @param l WVKzh
* @param i ,+0_kndR
*/ &uC7W.|
private void insertSort(int[] data, int start, int len) { ]R(=)
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); hW]:CIqk
} A+AqlM+$i
} hC,EO&
} a *>$6H;
} %ZZ\Xj
((#|>W\&
堆排序： ZPHB$]ri
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package org.rut.util.algorithm.support; 0P z"[
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import org.rut.util.algorithm.SortUtil; ^2=11
@#;2P'KL
/** *1|&uE&_R
* @author treeroot Q!WXFS
* @since 2006-2-2 B\`4TU}kE
* @version 1.0 ; &$djP
*/ pxjb^GZ0
public class HeapSort implements SortUtil.Sort{ -Z9e}$q$,
mGb,oj7l
/* (non-Javadoc) @uApm~}
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) X)P9f N~7
*/ Qt`}$]
public void sort(int[] data) { edD19A
MaxHeap h=new MaxHeap(); [jU.58*
h.init(data); Tc$Jvy-G4A
for(int i=0;i h.remove(); < j^8L^
System.arraycopy(h.queue,1,data,0,data.length); %v5IR
} S}WQ~e
(hr*.NS#
private static class MaxHeap{ ~qekM>z
.'aW~WR
void init(int[] data){ u 6A!Sw
this.queue=new int[data.length+1]; SHWD@WLE4
for(int i=0;i queue[++size]=data; j6}/pe*;;T
fixUp(size); |L wn<y
} W!6&T [j>
} ()%NotN;
@M=xdZNyJ
private int size=0; xO3-I@
F)XO5CBK
private int[] queue; },#@q_E
4TX~]tEyky
public int get() { IHC {2 ^
return queue[1]; rW),xfo0
} 4}&$s
qGivRDR$
public void remove() { dK.k,7R
SortUtil.swap(queue,1,size--); tg5G`P5PJ
fixDown(1); {XR3L'X
} 9IfeaoZZ4q
file://fixdown {&3{_Ml
private void fixDown(int k) { 5|:t$
int j; (58}G2}q
while ((j = k << 1) <= size) { $Jc>B#1
if (j < size %26amp;%26amp; queue[j] j++; D05JQ*
if (queue[k]>queue[j]) file://不用交换 _98 %?0
break; V)q|U6R
SortUtil.swap(queue,j,k); D^dos`L0b
k = j; VelR8tjP
} .^hk^r
} lD+f{GR
private void fixUp(int k) { tMbracm
while (k > 1) { Q95`GuI@
int j = k >> 1; caH!(V}6
if (queue[j]>queue[k]) u*w'.5l
break; Rlyx&C8
SortUtil.swap(queue,j,k); (,P6cWt}"
k = j; 5yl[#>qt
} zLt7jxx
} .=`r?#0
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} #^i.[7p
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} &\p=s.y?j
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SortUtil： +-$Hx5
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package org.rut.util.algorithm; n,l{1 q
5`tMHgQO
import org.rut.util.algorithm.support.BubbleSort; \""sf{S9
import org.rut.util.algorithm.support.HeapSort; +CaA%u
import org.rut.util.algorithm.support.ImprovedMergeSort; Rzj1D:?X@
import org.rut.util.algorithm.support.ImprovedQuickSort; 31-:xUIX
import org.rut.util.algorithm.support.InsertSort; r5wy]z^
import org.rut.util.algorithm.support.MergeSort; _(zPA4q8q
import org.rut.util.algorithm.support.QuickSort; ^1 U<,<
import org.rut.util.algorithm.support.SelectionSort; *f ;">(`o*
import org.rut.util.algorithm.support.ShellSort; Oye:V
^hyY,X
/** I[g;p8jr
* @author treeroot N*$L#L$*
* @since 2006-2-2 .z6"(?~
* @version 1.0 &aLelJ~
*/ +$SJ@IH[<
public class SortUtil { u|eV'-R)s
public final static int INSERT = 1; a`t<R
public final static int BUBBLE = 2; HQ0fY
public final static int SELECTION = 3; }j\_XaB
public final static int SHELL = 4; a 9H^e<g
public final static int QUICK = 5; {1VMwANj
public final static int IMPROVED_QUICK = 6; -RK R.,
public final static int MERGE = 7; ZOIx+%/Vd#
public final static int IMPROVED_MERGE = 8; b,r{wrLe)
public final static int HEAP = 9; lHI;fR
ed\umQ]
public static void sort(int[] data) { IizPu4|
sort(data, IMPROVED_QUICK); p~bx
} fFiFS\''V
private static String[] name={ umJ!j&(
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 58>C,+
}; Yn+d!w<3:
*kM^l!<g
private static Sort[] impl=new Sort[]{ "'@>cJ=
new InsertSort(), *^=zQ~
new BubbleSort(), _GF{Duxh
new SelectionSort(), aEvW<jHh
new ShellSort(), 7AouiL 2-W
new QuickSort(), JK=0juv<E
new ImprovedQuickSort(), 79MF;>=tV
new MergeSort(), LEn+0^hX
new ImprovedMergeSort(), }T1.~E
new HeapSort() ~[ZRE @
}; `SM37({c
lFT` WO
public static String toString(int algorithm){ NO'37d
return name[algorithm-1]; 8%Eemk>G{
} yNDplm|9*
u!@(u!Qz
public static void sort(int[] data, int algorithm) { J)n^b
impl[algorithm-1].sort(data); sn-P&"q
} }P*x/z~
)1iqM]~;B
public static interface Sort { UB2Ft=
public void sort(int[] data); ]@wKm1%v
} }-N4D"d4o
yBkcYHT
public static void swap(int[] data, int i, int j) { F1GFn|OA
int temp = data; ./i5VBP5
data = data[j]; }/J<#}t
data[j] = temp; %*a%F~Ss
} 8k9Yoht
} opfg %*