[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; vfOG(EkG.?
} T,5(JP(h3
int i1=l; NU.YL1
int i2=mid+1; o;'-^ LJ
for(int cur=l;cur<=r;cur++){ z i3gE$7
if(i1==mid+1) Jp +h''t
data[cur]=temp[i2++]; Ql?>,FZ
else if(i2>r) F7U$7(I2G
data[cur]=temp[i1++]; HC(o;,spO
else if(temp[i1] data[cur]=temp[i1++]; ?<D1]Xv
else ky@DH(^>
data[cur]=temp[i2++]; `a]feAl
} CAbT9Wz&
} P B"nf|pm
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} ~Ut?'}L( d
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改进后的归并排序: hXQo>t-$
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package org.rut.util.algorithm.support; Lr<?eWdCwJ
rwY{QBSf
import org.rut.util.algorithm.SortUtil; Z]=9=S| .4
>(eR0.x
/** [_zoJ
* @author treeroot o`7B@]
* @since 2006-2-2 W>m#Mz
* @version 1.0 HQ`A.E2
*/ `lN Z|U
public class ImprovedMergeSort implements SortUtil.Sort { og8"#%
+3o 4KB}
private static final int THRESHOLD = 10; !l~3K(&4
i2n66d
/* `bcCj~j
* (non-Javadoc) c$~J7e6$
* x}H%NzR
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) m9Hdg^L
*/ 77~l~EX
public void sort(int[] data) { K]yUPx
int[] temp=new int[data.length]; `d!~)D
mergeSort(data,temp,0,data.length-1); +*KDtqZjk
} & 6~AY:0r
[:cZDVaA|
private void mergeSort(int[] data, int[] temp, int l, int r) { DWcEl:
int i, j, k; .$s=E8fW
int mid = (l + r) / 2; x<h-F
if (l == r) $jL+15^N0+
return; ~A-VgBbU>_
if ((mid - l) >= THRESHOLD) ~+Ows
mergeSort(data, temp, l, mid); x).`nZ1
else bTc'E#
insertSort(data, l, mid - l + 1); _43 :1!os
if ((r - mid) > THRESHOLD) 3R ZD=`
mergeSort(data, temp, mid + 1, r); 7A46?kfu
else J)_IfbY
insertSort(data, mid + 1, r - mid); 99&PY[f:{
MI*@^{G
for (i = l; i <= mid; i++) { cK6IyJx-
temp = data; 1iIag}?p
} Q)l~?Fx
for (j = 1; j <= r - mid; j++) { 6Z68n
temp[r - j + 1] = data[j + mid]; d> L*2 g
} If%**o
int a = temp[l]; 1}b1RKKj<
int b = temp[r]; ]|)M /U *
for (i = l, j = r, k = l; k <= r; k++) { &*!) d"
if (a < b) { 5=9gH
data[k] = temp[i++]; vm`\0VGSW
a = temp; E>w|i
} else { eVujur$P
data[k] = temp[j--]; t7b\#o
b = temp[j]; aOTrng
} $Qq5Fx9kU
} \C;F5AO
} -'Y@yIb
XyE%<]
/** _chX {_Hu-
* @param data i`HXBq!|w
* @param l .GNl31f0
* @param i ]>k>Z#8E*
*/ 7="I;
private void insertSort(int[] data, int start, int len) { !nyUAZ9 :
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); IL N0/eH
} Ikj_ 0/%F
} g'{hp:
} e6igx
} "ba>.h,#'
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堆排序： %[7<GcWl
WbDD9ZS
package org.rut.util.algorithm.support; h@"u==0
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import org.rut.util.algorithm.SortUtil; |!?`KO{
|4A938'4j
/** ck\gazo~q
* @author treeroot sH{4.tw
* @since 2006-2-2 ik Pm,ZN
* @version 1.0 5W~-|8m
*/ aO>Nev
public class HeapSort implements SortUtil.Sort{ >KMTxHE`+
K18Sj,]B
/* (non-Javadoc) #ysSfM6
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /\|AHM
*/ e x`mu E
public void sort(int[] data) { >ISN2Kn
MaxHeap h=new MaxHeap(); >;zQ.2*
h.init(data); hp)k[|u;
for(int i=0;i h.remove(); ~q05xy8
System.arraycopy(h.queue,1,data,0,data.length); /E0/)@pDq
} )#_:5^1
qLh[BR
private static class MaxHeap{ (L7@ez
u+/1ryp
void init(int[] data){ sFWH*kdP?
this.queue=new int[data.length+1]; E A}Vb(2
for(int i=0;i queue[++size]=data; NgPY/R>
fixUp(size); 1>e%(k2w%
} UO{3vry48
} 64h$sC0z/e
}iCcXZ&5^
private int size=0; *^b<CZd9
;fnE"}
private int[] queue; "=ogO/_Q"
li~#6$
public int get() { vynchZ+g]
return queue[1]; qz2j55j
} (S4[,Sx6E
CEr*VsvjsU
public void remove() { gm}[`GMU
SortUtil.swap(queue,1,size--); yQM<(;\O
fixDown(1); \:D'u<8E
} S&`iEwG
file://fixdown "T,^>xD
private void fixDown(int k) { /6Vn WrN_
int j; pswEIa
while ((j = k << 1) <= size) { n.\|NR'v
if (j < size %26amp;%26amp; queue[j] j++; ?g\SF}2
if (queue[k]>queue[j]) file://不用交换 7o5~J)qIC
break; JK@" &
SortUtil.swap(queue,j,k); tfb_K4h6,
k = j; sLh %k
} `lA[-x~
} / %:%la%
private void fixUp(int k) { 5EqC.g.
while (k > 1) { .8K ~ h
int j = k >> 1; ~\~K,v
if (queue[j]>queue[k]) 1}"PLq(
break; x%\m/_5w%
SortUtil.swap(queue,j,k); Kgw_c:/'
k = j; K!a4>Du{
} xp<p(y8e1d
} `zZGL&9m`
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} 'E#;`}&Ah
wX!>&Gc.
} V0!.>sX9
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SortUtil： AJ`R2 $
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package org.rut.util.algorithm; h-`*S&mZ
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import org.rut.util.algorithm.support.BubbleSort; *f4BD||
import org.rut.util.algorithm.support.HeapSort; n:P5m9T
import org.rut.util.algorithm.support.ImprovedMergeSort; ?()$imb*
import org.rut.util.algorithm.support.ImprovedQuickSort; M~/R1\'&j
import org.rut.util.algorithm.support.InsertSort; ,\cO>y@
import org.rut.util.algorithm.support.MergeSort; `aw5"ns^V
import org.rut.util.algorithm.support.QuickSort; YPY'[j(p`n
import org.rut.util.algorithm.support.SelectionSort; GE0,d
import org.rut.util.algorithm.support.ShellSort; .oR_r1\y
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/** ,{_;q:
* @author treeroot y$n`+%_
* @since 2006-2-2 eGJ}';O,g
* @version 1.0 W7ffdODb
*/ 7<ZCeM2x
public class SortUtil { ;0!rq^JG
public final static int INSERT = 1; ,9:0T LLR
public final static int BUBBLE = 2; `p.O
public final static int SELECTION = 3; k}o*=s>M
public final static int SHELL = 4; "uthFE
public final static int QUICK = 5; z]Jpvw`p
public final static int IMPROVED_QUICK = 6; #*|0WaC
public final static int MERGE = 7; KW~fW r8
public final static int IMPROVED_MERGE = 8; }N6r/ VtOQ
public final static int HEAP = 9; d^Jf(NE0Yo
Xw2tCRzD
public static void sort(int[] data) { ?TXe.h|u
sort(data, IMPROVED_QUICK); V9"?}cR/W;
} tLzX L*
private static String[] name={ o/U"'FP
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ZTwCFn
}; NpIx\\d
^:c"%<"='
private static Sort[] impl=new Sort[]{ Vu`O%[Q/
new InsertSort(), BVt)~HZ
new BubbleSort(), uWSfr(loX
new SelectionSort(), u0vq`5L
new ShellSort(), MiX*PqNTM
new QuickSort(), ct3^V M&/
new ImprovedQuickSort(), =h{jF7
new MergeSort(), X!w&ib-
new ImprovedMergeSort(), @4Ox$M
new HeapSort() n#|pR2
}; 3;h%mkKQ+
\D]H>i$
public static String toString(int algorithm){ Rf~? u)h1
return name[algorithm-1]; oq>8
} xqua>!mqS
{{\ d5CkX
public static void sort(int[] data, int algorithm) { pM^r8kIH
impl[algorithm-1].sort(data); '*PJ-=G
} *&\fBi]
#)r
public static interface Sort { JlF$|y,gV,
public void sort(int[] data); VZ:LK
} %z_PEqRj
fs=W(~"
public static void swap(int[] data, int i, int j) { :]viLw\&g
int temp = data; .>{.!a
data = data[j]; 7Qc 4Oz:t
data[j] = temp; d1`us G"
} cTR@ :sm
} T%\f$jh6