[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; u7RlxA:
} :#?_4D!r
int i1=l; G7v<Q,s
int i2=mid+1; S$$SLy:P
for(int cur=l;cur<=r;cur++){ _kMHF
if(i1==mid+1) WSxoGly
data[cur]=temp[i2++]; %*npLDi
else if(i2>r) FJCORa@?_
data[cur]=temp[i1++]; ?a% F3B
else if(temp[i1] data[cur]=temp[i1++]; tD}-&"REP
else E0fMFG^P
data[cur]=temp[i2++]; u%yYLpaKf
} 9*K-d'm
} N"G\H<n
Ay 4P_>^
} kp<Au)u
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改进后的归并排序: 4;AQ12<[1
ji\LC%U-
package org.rut.util.algorithm.support; fmQif]J;;
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import org.rut.util.algorithm.SortUtil; \zFCph4
'/6f2[%Y"
/** eZ[Qhrc
* @author treeroot $t}W,?
* @since 2006-2-2 A- Abj'
* @version 1.0 41Q)w=hoN
*/ %$Py@g
public class ImprovedMergeSort implements SortUtil.Sort { DeNWh2
(GL'm[V
private static final int THRESHOLD = 10; J(/J;PW
"9aFA(H6w
/* IZLCwaW
* (non-Javadoc) W5Pur lu?
* !> +Lre@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Vq`/]&
*/ 4~$U#$u_
public void sort(int[] data) { dJnKa]X
int[] temp=new int[data.length]; <D)@;A
mergeSort(data,temp,0,data.length-1); oPaoQbR(A
} CL7/J[TS
{v=[~H>bt
private void mergeSort(int[] data, int[] temp, int l, int r) { ,P`GIGvkA
int i, j, k; y_q1Y70i2r
int mid = (l + r) / 2; ~'0n ]Fw
if (l == r) PHIc7*_
return; Nb_Glf
if ((mid - l) >= THRESHOLD) Vraz}JV
mergeSort(data, temp, l, mid); $E^sA|KcT
else :R:@V#Y
insertSort(data, l, mid - l + 1); @g;DA)!(
if ((r - mid) > THRESHOLD) V/"RCqY4
mergeSort(data, temp, mid + 1, r); t5K#nRd Z:
else d#bg(y\G|
insertSort(data, mid + 1, r - mid); ,98 F
G,Eh8HboK
for (i = l; i <= mid; i++) { *)^ZUk
temp = data; Z>Rshtg
} 0k?]~f
for (j = 1; j <= r - mid; j++) { )c9Xp:
temp[r - j + 1] = data[j + mid]; ( )ldn?v
} ,H/O"%OJ
int a = temp[l]; :KG=3un]
int b = temp[r]; _1$Y\Y
for (i = l, j = r, k = l; k <= r; k++) { s/11TgJ
if (a < b) { &{a#8sbf#c
data[k] = temp[i++]; f]?&R c2C
a = temp; 30Qp:_D
} else { oSy9Xw
data[k] = temp[j--]; [U^Cz{G
b = temp[j]; $kmY[FWu?
} ><S2o%u~
} oVbs^sbRH
} `#`C.:/n
hmuhq:<f
/** ?^7X2 u$nm
* @param data w7pX]<?R"
* @param l 0 .T5% _/
* @param i .Sa=VC?EZ
*/ @t$yg$Q?[
private void insertSort(int[] data, int start, int len) { wnXU=
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); e F}KOOfC
} 3bo [34
} A8S9HXL
} 0/7.RpX,.
} mOTA
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堆排序： $1zWQJd[-
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package org.rut.util.algorithm.support; 5t_Dt<lIz
ta x:9j|~
import org.rut.util.algorithm.SortUtil; !>Q\Y`a,*
LZs'hA<L
/** .V_5q:tu
* @author treeroot 8o $` '
* @since 2006-2-2 i=P}i8,^=
* @version 1.0 5^ubXA
*/ >X"\+7bw
public class HeapSort implements SortUtil.Sort{ 8+Gwv SDU
#a tL2(wJ
/* (non-Javadoc) b^}U^2S%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Vl<7>
*/ .VUnOdI
public void sort(int[] data) { _E6N*ORV
MaxHeap h=new MaxHeap(); ZIh)D[n
h.init(data); mC(YO y
for(int i=0;i h.remove(); Qr6PkHU
System.arraycopy(h.queue,1,data,0,data.length); e$`hRZ%
} H}CmSo8&
\,v+ejhw
private static class MaxHeap{ ,zK E$
d(b~s2\i
void init(int[] data){ 8=0I4\
this.queue=new int[data.length+1]; V(io!8,
for(int i=0;i queue[++size]=data; K,U8vc
fixUp(size); 0&2`)W?9
} `YMd0*
} ?FR-aXx
<nN# K{AH
private int size=0; tAY{+N]f
qss)5a/x.
private int[] queue; C'Y2kb
&rX#A@=
public int get() { =2} kiLKO
return queue[1]; 7~k=t!gTY
} '^$+G0jv
H5:f&m
public void remove() { +#<Z/
SortUtil.swap(queue,1,size--); ~ ^
fixDown(1); 5)hfI7{d
} )%n$_N n
file://fixdown >&7^yXS
private void fixDown(int k) { ?0+g.,9
int j; d/~g3n>|
while ((j = k << 1) <= size) { \[*q~95$v
if (j < size %26amp;%26amp; queue[j] j++; 3 5L0CM
if (queue[k]>queue[j]) file://不用交换 HTvUt*U1
break; s2 :Vm\
SortUtil.swap(queue,j,k); MPw?HpM
k = j; &%t&[Se_~
} 8~TKiR5
} ;_E|I=%'E
private void fixUp(int k) { OIjSH~a.
while (k > 1) { WLfDXx2A
int j = k >> 1; Np ru
if (queue[j]>queue[k]) urCTP.F
break; j|!t3}((
SortUtil.swap(queue,j,k); #k`gm)|
k = j; i27)c)\BM
} Ude?[6
} "dvo@n|
[+xsX*+
} K{"hf:k
]yZ%wU9!
} *kYGXT,f]
s;* UP
SortUtil： t4/ye>P &
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package org.rut.util.algorithm; |5X[/Q*K`W
mZPvG
import org.rut.util.algorithm.support.BubbleSort; (j??
import org.rut.util.algorithm.support.HeapSort; d%-/U!z?
import org.rut.util.algorithm.support.ImprovedMergeSort; ]t`SCsoo
import org.rut.util.algorithm.support.ImprovedQuickSort; \hBzP^*"n
import org.rut.util.algorithm.support.InsertSort; YhS_ ,3E
import org.rut.util.algorithm.support.MergeSort; CS(2bj^6D
import org.rut.util.algorithm.support.QuickSort; c%gL3kOT
import org.rut.util.algorithm.support.SelectionSort; i.`n^R;N
import org.rut.util.algorithm.support.ShellSort; y)CvlI
u'>94Gm}
/** pi/0~ke4"
* @author treeroot g=@d!]Z~[
* @since 2006-2-2 }f?[m&<
* @version 1.0 k{N!}%*2
*/ >][D"
public class SortUtil { } e+`Kxy
public final static int INSERT = 1; l!&ik9m
public final static int BUBBLE = 2; pq&[cA_w
public final static int SELECTION = 3; ~&Ne P
public final static int SHELL = 4; x-X~'p'f
public final static int QUICK = 5; #vga qe9
public final static int IMPROVED_QUICK = 6; DF4CB#
public final static int MERGE = 7; ^7YNM<_%@
public final static int IMPROVED_MERGE = 8; 6L$KMYHE
public final static int HEAP = 9; gBcs
,qv\Y]
public static void sort(int[] data) { \U>&W
sort(data, IMPROVED_QUICK); liH#=C8l*%
} >V27#L2:J
private static String[] name={ NjOUe?BQ
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" vIOGDI>
}; G:tY1'5
aK@ Y) Ju'
private static Sort[] impl=new Sort[]{ YI,t{Wy
new InsertSort(), "V26\
new BubbleSort(), rz k;Q@1
new SelectionSort(), rVoV@,P
new ShellSort(), M>p<1`t-&
new QuickSort(), Hcu!bOQ
new ImprovedQuickSort(), ~o"=4q`>
new MergeSort(), -8Mb~Hfl0
new ImprovedMergeSort(), bHv"!
new HeapSort() aXJ/"k #Tl
}; Q'Osw"
52tc|j6~#
public static String toString(int algorithm){ rD SYR\cg
return name[algorithm-1]; _r{H)}9
} 0h*Le
PD.$a-t
public static void sort(int[] data, int algorithm) { 4hwb] Yz
impl[algorithm-1].sort(data); wb?k
} C`g "Mk8
NOXP}M
public static interface Sort { Rq5'=L
public void sort(int[] data); l X+~;94
} {&IB[Y6
^py=]7[I
public static void swap(int[] data, int i, int j) { rBTg"^jsw
int temp = data; :)lG}c
data = data[j]; @NRN#~S,_]
data[j] = temp; },l i'r#p
} (is',4^b
} $e7%>*?m