[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; 0;l~B
} h}a}HabA
int i1=l; 3WP\MM
int i2=mid+1; RFRXOyGz$
for(int cur=l;cur<=r;cur++){ G[ U5R?/
if(i1==mid+1) $l*?Ce:
data[cur]=temp[i2++]; )8C`EPe
else if(i2>r) $Y7VA
data[cur]=temp[i1++]; nriSVGi
else if(temp[i1] data[cur]=temp[i1++]; OdFF)-K>~
else i(|ug_^
data[cur]=temp[i2++]; a(vt"MQ_
} rNk'W,FU
} #r#[&b
]jD\4\M}
} /O:4u_
@ ;!IPiU
改进后的归并排序: \OVFZ D
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package org.rut.util.algorithm.support; ~ L4NK#
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import org.rut.util.algorithm.SortUtil; %Lh%bqGz
ijOp{
/** , ~ 1+MZ=
* @author treeroot .6`r`|=
* @since 2006-2-2 [ iTP:8
* @version 1.0 <OEIG0
*/ 4,;*sc6*
public class ImprovedMergeSort implements SortUtil.Sort { LVg#E*J
=p4n@C
private static final int THRESHOLD = 10; ]t)N3n6Bc
9>4#I3
/* LY0f`RX*&
* (non-Javadoc) 9HJYrzf{%
* oH w!~c7
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |^-D&C(Eu
*/ 7nT|yL?
public void sort(int[] data) { `+n0a@BVB
int[] temp=new int[data.length]; &j:e<{@
mergeSort(data,temp,0,data.length-1); vCi`htm%
} / ]8e[t>!f
+r!NR?^m
private void mergeSort(int[] data, int[] temp, int l, int r) { _S{TjGZ&
int i, j, k; oW^x=pS9
int mid = (l + r) / 2; CaZc{
if (l == r) \=WPJm`p
return; nx%As
if ((mid - l) >= THRESHOLD) 8p 4[:M@
mergeSort(data, temp, l, mid); 1*p6UR&
else = zmxki
insertSort(data, l, mid - l + 1); >fYcr#i0[
if ((r - mid) > THRESHOLD) (Huvo9
mergeSort(data, temp, mid + 1, r); ]<<,{IQ
else v'?Smd1v /
insertSort(data, mid + 1, r - mid); 9KX% O-'
B(M-;F
for (i = l; i <= mid; i++) { `F/R:!v
temp = data; E "=4(
} -m}'I8
for (j = 1; j <= r - mid; j++) { [RKk-8I
temp[r - j + 1] = data[j + mid]; ufk2zL8y
} = vqJ0!
int a = temp[l]; b4L7]&
int b = temp[r]; !AXLoq$SY
for (i = l, j = r, k = l; k <= r; k++) { >0@w"aKn
if (a < b) { ;)h?P.]
data[k] = temp[i++]; :!s7B|_U
a = temp; s/hgWW$
} else { #~'d Y\&
data[k] = temp[j--]; #qVTB@d
b = temp[j]; 9@CRL=
} 8|@) #:
} jv.tg,c_6
} vk E]$4P[$
i&H^xgm
/** j-BNHX
* @param data jfK&CA
* @param l ifS#9N|8
* @param i %JDQ[%3qY
*/ L|WrdT D;
private void insertSort(int[] data, int start, int len) { GcN}I=4|
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Lx>[`QT
} +-qk\sQ
} ez32k[eV!
} ,oH\rrglf
} $B?8\>_?
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堆排序： B](R(x>L
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package org.rut.util.algorithm.support; P Ptmh. }e
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import org.rut.util.algorithm.SortUtil; Lp-$Ie
&ic'!h"
/** 3ux7^au
* @author treeroot ^Lb\k|U,\
* @since 2006-2-2 2'=)ese
* @version 1.0 F_0D)H)N@
*/ h;vY=r-
public class HeapSort implements SortUtil.Sort{ IT:WiMDQ}
CN(-Jd.b
/* (non-Javadoc) jR}EBaI}
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Psf'^42(v
*/ gpyio1V>
public void sort(int[] data) { I)yaR+l
MaxHeap h=new MaxHeap(); }O+xs3Uv
h.init(data); 'AK '(cZ
for(int i=0;i h.remove(); ftMlm_u
System.arraycopy(h.queue,1,data,0,data.length); 9nVb$pfe#
} /[lEZ['^
%Qz<Lk">.
private static class MaxHeap{ ;76+J)
yKUxjb^b\
void init(int[] data){ 4G:~|N.{p
this.queue=new int[data.length+1]; R"XycXn_$
for(int i=0;i queue[++size]=data; [*O>Lk
fixUp(size); muXP5MO
} 6p }a!
} +x{o
>}f!. i
private int size=0; gdD|'h
W8QP6^lY
private int[] queue; R\ 8[6H
EGI$=Y
public int get() { _R(ZvsOZ
return queue[1]; [2xu`HT02
} Y[)mHs2
nHeJ20
public void remove() { xO:h[
SortUtil.swap(queue,1,size--); u(3 uZ:
fixDown(1); XK\nOHLS
} #Pk{emYW
file://fixdown -q9m@!L
private void fixDown(int k) { Uu8ayN j
int j; =Pn"nkpML
while ((j = k << 1) <= size) { ]e-QNI
if (j < size %26amp;%26amp; queue[j] j++; s%y<FXUj
if (queue[k]>queue[j]) file://不用交换 j~Fd8]@
break; [Y!HQ9^LEp
SortUtil.swap(queue,j,k); XM5)|D
k = j; ':}9>B3 S
} h/A\QW8Sd
} ;]xc}4@=mg
private void fixUp(int k) { _)<5c!
while (k > 1) { uQbag]&j
int j = k >> 1; ;;i419
if (queue[j]>queue[k]) m$W2E.-$'#
break; zQ:nL*X'Z"
SortUtil.swap(queue,j,k); &a'mG=(K_c
k = j; !BW!!/U
} b=BNbmX
} 8J&9}@y
z[ ;n2o|s
} nLAwo3
du}HTrsC
} hd9~Zw]V
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SortUtil： nm`(;<W
%JPr 7 }
package org.rut.util.algorithm; /L2ZI1v
KM)MUPr
import org.rut.util.algorithm.support.BubbleSort; cXt&k
import org.rut.util.algorithm.support.HeapSort; |1 qrU(
import org.rut.util.algorithm.support.ImprovedMergeSort; !XjZt
import org.rut.util.algorithm.support.ImprovedQuickSort; <t!0{FJ
import org.rut.util.algorithm.support.InsertSort; %"c;kvw
import org.rut.util.algorithm.support.MergeSort; Mu:zWLM*M
import org.rut.util.algorithm.support.QuickSort; ?r(vXq\
import org.rut.util.algorithm.support.SelectionSort; &S*{a
import org.rut.util.algorithm.support.ShellSort; rtJ@D2Hj^
+%[, m&
/** k>MXOUaW.
* @author treeroot jqvw<+#
* @since 2006-2-2 ~}p k^FA
* @version 1.0 E`HA0/
*/ |UlR+'rl
public class SortUtil { + AjV0#n
public final static int INSERT = 1; [E<A/_z
public final static int BUBBLE = 2; )CoFRqz<h
public final static int SELECTION = 3; um]N]cCD`
public final static int SHELL = 4; nTsV>lQY,
public final static int QUICK = 5; WxD$k3U
public final static int IMPROVED_QUICK = 6; +KExK2=
public final static int MERGE = 7; 3,i`FqQa
public final static int IMPROVED_MERGE = 8; J R~s`>2
public final static int HEAP = 9; 7}\AhQ, S
[-#1;!k
public static void sort(int[] data) { OY|9V
sort(data, IMPROVED_QUICK); )40YA\V
} IeChz d
private static String[] name={ kz1Z K
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" qooTRqc#,
}; 7o+VhW<|5
M7Z&t'=
private static Sort[] impl=new Sort[]{ (?uK
new InsertSort(), aH%tD!%,o
new BubbleSort(), tculG|/
new SelectionSort(), s$9ow<oi]
new ShellSort(), sX>|Y3S\U
new QuickSort(), X_JC1
new ImprovedQuickSort(), }Dcpe M?
new MergeSort(), OmK0-fa/
new ImprovedMergeSort(), O*/Utl
new HeapSort() 2y$DTMu
}; uU$/4{
ZA_~o#0%
public static String toString(int algorithm){ p+Bvfn
return name[algorithm-1]; tIBEja^l
} {hO|{vz
Y8s-cc(
public static void sort(int[] data, int algorithm) { @:'E9J06
impl[algorithm-1].sort(data); 26_PFHQu4
} ;$!0pxL)s
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public static interface Sort { <;+QK=f
public void sort(int[] data); Lrx"Hn{
} RM2feWm
3!*`hQ;s
public static void swap(int[] data, int i, int j) { zhRF>Y`
int temp = data; |`wJ {-
data = data[j]; yYk?K<ou
data[j] = temp; T8T,G4Q
} _mQ~[}y+?
} k ;vOPcw