[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; OADW;fj
} Ot)S\s>
int i1=l; G<* Iw>ep
int i2=mid+1; F]t=5 -O<
for(int cur=l;cur<=r;cur++){ +u&[ j/
if(i1==mid+1) F-$!e?,H
data[cur]=temp[i2++]; s/.P/g%tA>
else if(i2>r) wqi0%Cu*
data[cur]=temp[i1++]; cg o
else if(temp[i1] data[cur]=temp[i1++]; &>B"/z
else :%Oz:YxC/
data[cur]=temp[i2++]; e"_kH_7sv
} 8t. QFze?
} Bgn%d4W;G
vw4b@v-XQ3
} ^Ua6.RH8
4$WR8
改进后的归并排序: ?O3d Sxi
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package org.rut.util.algorithm.support; C<3<,~gI
lx=tOfj8
import org.rut.util.algorithm.SortUtil; %1$#fxR
KGcjZx04!
/** i/skU9
* @author treeroot UfPHV%Wd
* @since 2006-2-2 !><asaB]1
* @version 1.0 )UM^#<-
*/ [8^q3o7n
public class ImprovedMergeSort implements SortUtil.Sort { ^!d0abA
SJ<v< B
private static final int THRESHOLD = 10; w]yVNB
R^$|D)(
/* C l,vBjl h
* (non-Javadoc) }{VOyPG
* \ ZE[7Ae
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) pmvd%X\f
*/ (S?Y3l|
public void sort(int[] data) { g_`a_0v
int[] temp=new int[data.length]; * 70ZAo4
mergeSort(data,temp,0,data.length-1); Z#L4n#TT
} ^a_a%ws
(or"5}\6-
private void mergeSort(int[] data, int[] temp, int l, int r) { ?KOw~-u
int i, j, k; bY=[ USgps
int mid = (l + r) / 2; p/?o^_s
if (l == r) r+8D|stS
return; GaG>0x
if ((mid - l) >= THRESHOLD) ,d,2Q
mergeSort(data, temp, l, mid); @;tfHoXD
else (X,i,qK/
insertSort(data, l, mid - l + 1); SXZ9+<\
if ((r - mid) > THRESHOLD) T1$E][@Iv
mergeSort(data, temp, mid + 1, r); '2*OrY
else wCB*v<*
insertSort(data, mid + 1, r - mid); .Mb[j1L^
^]nLE]M
for (i = l; i <= mid; i++) { e))L&s
temp = data; 32<D9_
} hj9TiH/+
for (j = 1; j <= r - mid; j++) { AtG~!)hG
temp[r - j + 1] = data[j + mid]; p@su:B2Rl
} v}6iI}r
int a = temp[l]; ovTL'j!
int b = temp[r]; fw jo?
for (i = l, j = r, k = l; k <= r; k++) { vKG\8+
if (a < b) { b4e~Z
data[k] = temp[i++]; 05q760I+
a = temp; heCM+=#~
} else { )N&SrzqTK
data[k] = temp[j--]; |(3y09
b = temp[j]; X3l>GeUi
} }}=n]_f
} Ak9{P`
} 7Ed0BJTa
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/** rF-SvSj}
* @param data K=[7<b,:3
* @param l 0Idek
* @param i DQQ]grU
*/ [Y .8C$0
private void insertSort(int[] data, int start, int len) { 5qtk#FB
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); @(sz"
} '^m.vS!/
} a|7C6#iz$
} _YF>Y=D-
} sm/aL^4
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堆排序： TUcFx_
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package org.rut.util.algorithm.support; avRtYL
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import org.rut.util.algorithm.SortUtil; JY,$B-l
aj&L ZDD6
/** 6!m#;8 4
* @author treeroot Ib#-M;{
* @since 2006-2-2 hu}$\
* @version 1.0 el9P@r0
*/ E)_n?>Ar
public class HeapSort implements SortUtil.Sort{ MYS`@%ZV#k
loVg{N:
/* (non-Javadoc) M}\h?s
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]/=RABi
*/ V+E8{|dYL
public void sort(int[] data) { Ou_H&R
MaxHeap h=new MaxHeap(); 4Hj)Av<O(
h.init(data); RpivO,
for(int i=0;i h.remove(); l)%PvLbL
System.arraycopy(h.queue,1,data,0,data.length); =0ZRGp
} BDI|z/~&
qIi \[Ugh
private static class MaxHeap{ 3a?-UT!
}4|EHhG
void init(int[] data){ 1+FVM\<&
this.queue=new int[data.length+1]; !Y~UO)u2
for(int i=0;i queue[++size]=data; >(Y CZ
fixUp(size); ojd0um6I{
} *dw.=a9
} Bh3F4k2bg7
(P|[<Sd
private int size=0; s;VW %e
V`I4"}M1
private int[] queue; F)^0R%{C
6'#5Dqw"r
public int get() { ;st0Ekni)
return queue[1]; b>uD-CSA
} C"I jr=w
m+(Cl#+
public void remove() { :PO./IBX
SortUtil.swap(queue,1,size--); ~lj[> |\Oj
fixDown(1); xuioU
} up5f]:!
file://fixdown p'R<yB)V
private void fixDown(int k) { o2!738
int j; <z<>E1ZLI
while ((j = k << 1) <= size) { 4aXIRu%#7
if (j < size %26amp;%26amp; queue[j] j++; G2`z?);1b
if (queue[k]>queue[j]) file://不用交换 gb_Y]U
break; b>-DX
SortUtil.swap(queue,j,k); J,Sa7jv[
k = j; CHgip&(.F
} EvT$|#FY
} `2.c=,S{
private void fixUp(int k) { (]]hSkE
while (k > 1) { p@tg pFt
int j = k >> 1; (0 T!-hsP
if (queue[j]>queue[k]) X-["{
break; <,} h8;Fr
SortUtil.swap(queue,j,k); 37hdZt.,
k = j; NqD]p{>Y
} `ASDUgx Mq
} 94tfR$W;-
]oGd,v X
} @c|=onx5
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} YSD G!
\=%lH=yS
SortUtil： /QXUD.( 8
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package org.rut.util.algorithm; *'Yy@T8M
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import org.rut.util.algorithm.support.BubbleSort; s#X/ F
import org.rut.util.algorithm.support.HeapSort; D+7xMT8pqH
import org.rut.util.algorithm.support.ImprovedMergeSort; Hx.|5n,5
import org.rut.util.algorithm.support.ImprovedQuickSort; OUBGbld
import org.rut.util.algorithm.support.InsertSort; '@{:FrG*U
import org.rut.util.algorithm.support.MergeSort; qb"S
import org.rut.util.algorithm.support.QuickSort; -@>{q/
import org.rut.util.algorithm.support.SelectionSort; `J.,dqGb
import org.rut.util.algorithm.support.ShellSort; !^arWH[od
lod+]*MD
/** ob7'''i
* @author treeroot zx#Gm=H4
* @since 2006-2-2 Ks.b).fH
* @version 1.0 Sz0PZtJ
*/ !#0)`4O
public class SortUtil { Wb}-H-O
public final static int INSERT = 1; /2K"Mpf8
public final static int BUBBLE = 2; un "I
public final static int SELECTION = 3; bDl:,7;
public final static int SHELL = 4; Myc-lCE
public final static int QUICK = 5; K,S4
public final static int IMPROVED_QUICK = 6; T<]{:\*n
public final static int MERGE = 7; ?mH=3 :~
public final static int IMPROVED_MERGE = 8; kz=ho~ @
public final static int HEAP = 9; 5IU!BQU
YIe1AF}
public static void sort(int[] data) { B!'K20"gF
sort(data, IMPROVED_QUICK); #0AyC.\
} 7 A0?tG
private static String[] name={ PZ]tl
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" <'=!f6Wh
}; G$C2?|V)=
J jAxNviG
private static Sort[] impl=new Sort[]{ @<W` w
new InsertSort(), R0?bcP&
new BubbleSort(), eT%x(P
new SelectionSort(), Bl\:YYd
new ShellSort(), }IygU 6{G
new QuickSort(), (;fJXgj.
new ImprovedQuickSort(), e'mF1al
new MergeSort(), zjoo;(?D|
new ImprovedMergeSort(), eU"yF >6'
new HeapSort() H;`F}qQ3
}; gJ l^K
"%T~d[M
public static String toString(int algorithm){ ,i_+Z |Ls
return name[algorithm-1]; X;LYGJ{Xk
} C^q|(G)
9~V'Wev
public static void sort(int[] data, int algorithm) { ~<k>07
impl[algorithm-1].sort(data); ld(60?z>FH
} ~W@dF~r
)?{<Tt@
public static interface Sort { Jxl'!8t
public void sort(int[] data); ..yV=idI
} wH"9N+82M
EC,,l'%a|/
public static void swap(int[] data, int i, int j) { HQ+{9Z8 ?5
int temp = data; rl.K{Uad
data = data[j]; U)dcemQY
data[j] = temp; 1ZFKLI`V
} @,<jPR.
} FH}?QebSR