[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; /Zm@.%.
} <a$cB+t
int i1=l; YRC`2)_'
int i2=mid+1; NA0hQGN}
for(int cur=l;cur<=r;cur++){ ry7(V:ic
if(i1==mid+1) K.X% Q,XD
data[cur]=temp[i2++]; (\WePOy&
else if(i2>r) {/n$Y|TIQt
data[cur]=temp[i1++]; v'_tna6`O
else if(temp[i1] data[cur]=temp[i1++]; I"DV}jg6|
else K"g[%O<
data[cur]=temp[i2++]; #jDO?Y Sa
} 55,vmDd
} aQRZyE}
)'fIrBT
} 4~o\Os+8
YVs{\1|'
改进后的归并排序: 1XHGW=n
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package org.rut.util.algorithm.support; sM?DNE^BvW
Y61E|:fV!
import org.rut.util.algorithm.SortUtil; F." L{g
$&a`zffG
/** D_, 2z
* @author treeroot #m8Oy|Y9`
* @since 2006-2-2 .(`u'G=
* @version 1.0 #p_ ~L4iW
*/ >!a*wf~]
public class ImprovedMergeSort implements SortUtil.Sort { K0+J!-a]7
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private static final int THRESHOLD = 10; ):.]4n{L
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/* .6/[X`*
* (non-Javadoc) /ox}l<ha
* !).D
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3}N:oJI$z
*/ 7J 0!vq
public void sort(int[] data) { E~N}m7kTl/
int[] temp=new int[data.length]; =)y=M!T2
mergeSort(data,temp,0,data.length-1); X7n~Ws&s@
} B*?v`6
3J:!8Gmk
private void mergeSort(int[] data, int[] temp, int l, int r) { P@*whjPmo
int i, j, k; T1e}WJbFE
int mid = (l + r) / 2; DrB=
if (l == r) }O!LTD
return; ;OVJM qg
if ((mid - l) >= THRESHOLD) OSq"q-Q
mergeSort(data, temp, l, mid); l'o'q7&=z
else gbSZ- ej
insertSort(data, l, mid - l + 1); nE/T)[1|
if ((r - mid) > THRESHOLD) t`Hwq
mergeSort(data, temp, mid + 1, r); xpSMbX{e
else y#T":jpR
insertSort(data, mid + 1, r - mid); !5{t1 oJ
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for (i = l; i <= mid; i++) { .c BJA&/
temp = data; pX2 Ki^)]
} YE0s5bB6
for (j = 1; j <= r - mid; j++) { ggbew6L$Z
temp[r - j + 1] = data[j + mid]; {@C+Js5
} R%5\1!Fl=G
int a = temp[l]; ';$2j~
int b = temp[r]; vB#3jI
for (i = l, j = r, k = l; k <= r; k++) { &d6'$h:kHb
if (a < b) { vU~#6sl
data[k] = temp[i++]; YZmD:P
a = temp; GMiWS:`;v`
} else { _#-(XQa
data[k] = temp[j--]; ?)JW}3<.
b = temp[j]; 2^Y1S?g.
} 'rz*mR8
} ;AHa|35\
} lRentNg0b
VxsW3*`
/** r,0> 40^
* @param data p-zLi!
* @param l $XaZqzeVI
* @param i \:O5,wf2
*/ ! .!qJ%
private void insertSort(int[] data, int start, int len) { C96|T>bk
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); <.=
} Zcdt\;HKr
} JQ0KXS Nr
} YK_a37E{F
} Bz]64/
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堆排序： :%;K`w
~ZL}j+L/
package org.rut.util.algorithm.support; A;{8\e
#&Biu}4D
import org.rut.util.algorithm.SortUtil; K);:+s-
"X}!j>-
/** )eUb@Eu
* @author treeroot UWmWouA
* @since 2006-2-2 8R-?x/:
* @version 1.0 tl0_as
*/ fr:RiOPn
public class HeapSort implements SortUtil.Sort{ Yuh t<:`
h-#Glse<
/* (non-Javadoc) q/&Z6LJ)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +#n[55d
*/ DBVe69/S
public void sort(int[] data) { @(oz`|*
MaxHeap h=new MaxHeap(); 8l)^#"ySA
h.init(data); $ V}s3
for(int i=0;i h.remove(); .D>%-
System.arraycopy(h.queue,1,data,0,data.length); \@tt$ m%
} f{ENSUtCrR
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private static class MaxHeap{ %*:-4K
pdmeB
void init(int[] data){ L?0dZY-"
this.queue=new int[data.length+1]; &]uhPx/
for(int i=0;i queue[++size]=data; ,mjwQ6:Ny
fixUp(size); "r.pU(uxt
} xS*f{5Hr8
} Ugrcy7
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private int size=0; 5C2 *f4|
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private int[] queue; ?JtFiw
Wh 8fC(BE
public int get() { eWcS>N
return queue[1]; e7 5*84
} "y>l2V,4j%
-/KVZ
public void remove() { ])T*T$u
SortUtil.swap(queue,1,size--); "(T@*"vX2
fixDown(1); ;M\H#%G.
} k\1q Jr
file://fixdown d;)Im "
private void fixDown(int k) { wcB-)Ra
int j; ~#@sZ0/<
while ((j = k << 1) <= size) { \ $z.x-U
if (j < size %26amp;%26amp; queue[j] j++; 3Pkzzyk_|D
if (queue[k]>queue[j]) file://不用交换 rzEE|
break; t$R|lv5<
SortUtil.swap(queue,j,k); wnhac}
k = j; w^z}!/"]u
} #OH# &{H
} b pExYyt
private void fixUp(int k) { wrw~J
while (k > 1) { s+o/:rrxY
int j = k >> 1; 0SA c1
if (queue[j]>queue[k]) `<C)oF\~f
break; !</5 )B`5:
SortUtil.swap(queue,j,k); "4}{Z)&R2
k = j; d];E99}
} Hi<{c
} rEs,o3h?po
|Pwb7:a3
} [2.pZB
4k<4=E
} xHe<TwkI
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SortUtil： o#H"tYP
EZE/~$`3
package org.rut.util.algorithm; V+cHL
w6v P a
import org.rut.util.algorithm.support.BubbleSort; 3[aCy4O
import org.rut.util.algorithm.support.HeapSort; pH'#v]"
import org.rut.util.algorithm.support.ImprovedMergeSort; q_']i6
import org.rut.util.algorithm.support.ImprovedQuickSort; :!'aP\uE
import org.rut.util.algorithm.support.InsertSort; 4LJUO5(y@
import org.rut.util.algorithm.support.MergeSort; |oC&;A
import org.rut.util.algorithm.support.QuickSort; :C_\.pA
import org.rut.util.algorithm.support.SelectionSort; vgo-[^FiP$
import org.rut.util.algorithm.support.ShellSort; rh?!f(_@
97NF*-)N
/** k9'%8(7M:
* @author treeroot 8cF-kfbfZ
* @since 2006-2-2 tDF6%RG
* @version 1.0 ``$At,m
*/ *5.s@L( VU
public class SortUtil { xSug-
public final static int INSERT = 1; 3m
public final static int BUBBLE = 2; HE7JQP!q
public final static int SELECTION = 3; gO1`zP!9Z
public final static int SHELL = 4; bu,Z'
public final static int QUICK = 5; VQ{}S $jQ
public final static int IMPROVED_QUICK = 6; thl{IU
public final static int MERGE = 7; # ]&=]K1V
public final static int IMPROVED_MERGE = 8; <Y9((QSM4
public final static int HEAP = 9; <s)+V6\E
8'@pX<
public static void sort(int[] data) { W2qW`Ujo{
sort(data, IMPROVED_QUICK); -U'6fx) +
} L&][730
private static String[] name={ z?Hvh
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" W9t%:wF
}; sq*d?<:3
bJmVq%>;
private static Sort[] impl=new Sort[]{ +_3>T''_
new InsertSort(), ePP-&V"`"
new BubbleSort(), Xu3o,k
new SelectionSort(), E<>n0",
new ShellSort(), v|<Dc8i+
new QuickSort(), =YE"6iU
new ImprovedQuickSort(), 1 nIb/nY
new MergeSort(), YFy5>*W
new ImprovedMergeSort(), S%R:GZEf_
new HeapSort() :S{[^-"
}; yE. ZvvQA
@G~T&6E!
public static String toString(int algorithm){ My&h{Qk
return name[algorithm-1]; d_-{-@
} .^X IZ
{UT^pIP\
public static void sort(int[] data, int algorithm) { :%{MMhbx
impl[algorithm-1].sort(data); O\q|b#q}/
} p>96>7w
TGY^,H>J
public static interface Sort { %19TJn%J$
public void sort(int[] data); O|O#T.Tg
} [Z`q7ddd^
[mYmrLs6
public static void swap(int[] data, int i, int j) { bP`yLz
int temp = data; .fk!~8b[Q+
data = data[j]; Ha)eeE$
data[j] = temp; 6(f[<V!r
} UW8b(b[-6b
} 9mIq9rQ|*