[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; pbM"tr_A{
} 02_37!\
int i1=l; ^KK9T5H
int i2=mid+1; 8N58w)%7`
for(int cur=l;cur<=r;cur++){ 4h[S`;D0Vf
if(i1==mid+1) RR8Z 9D;
data[cur]=temp[i2++]; Nvef+L,v
else if(i2>r) $1(FN+ Mb
data[cur]=temp[i1++]; wd=xs7Dz<p
else if(temp[i1] data[cur]=temp[i1++]; Q<e`0cu|p
else &;V3[ *W"
data[cur]=temp[i2++]; IdvBQ [Gj
} x>$!R\Cj
} $!msav
%5zztReI
} 9gz"r
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改进后的归并排序: Xc^7
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package org.rut.util.algorithm.support; N$jI&SI?}
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import org.rut.util.algorithm.SortUtil; JMT?+/Qbu
kOe~0xoT@u
/** .W>8bg'u9
* @author treeroot !iOuIYjV
* @since 2006-2-2 V r0-/T
* @version 1.0 e$wbYByW
*/ X> *o\
public class ImprovedMergeSort implements SortUtil.Sort { /)ubyl]^p
$B iG7,[#
private static final int THRESHOLD = 10; jgr2qSUC
>QusXD"L>
/* x_&m$Fh
* (non-Javadoc) ^1%gQ@P
* M?UlC
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) p2=Sbb
*/ ,8F?v~C
public void sort(int[] data) { >%"Q]p
int[] temp=new int[data.length]; vd5"phn 3
mergeSort(data,temp,0,data.length-1); kRk=8^."By
} zn4Yo
AR}M*sSh
private void mergeSort(int[] data, int[] temp, int l, int r) { `B`/8Cvg
int i, j, k; :*2+t-
int mid = (l + r) / 2; l;e&p${P
if (l == r) lRn6Zh
return; v!;E1
if ((mid - l) >= THRESHOLD) Y=gj{]4
mergeSort(data, temp, l, mid); ]c8$%
else =f)S=0UF
insertSort(data, l, mid - l + 1); VesO/xG<
if ((r - mid) > THRESHOLD) o3;u*f0rWn
mergeSort(data, temp, mid + 1, r); X-Sso9/q.
else EO|r
insertSort(data, mid + 1, r - mid); ))n7.pB9/
o(W|BD!
for (i = l; i <= mid; i++) { @"~Mglgw
temp = data; %qzpt{'?<
} u+]v.Mt
for (j = 1; j <= r - mid; j++) { |wf:|%
temp[r - j + 1] = data[j + mid]; zS:89y<
} lPS A
int a = temp[l]; 5JbPB!5;
int b = temp[r]; 'DQp
for (i = l, j = r, k = l; k <= r; k++) { TsPO+x$l
if (a < b) { ta+'*@V+G
data[k] = temp[i++]; ]|q\^k)JU
a = temp; i\S } aCm
} else { [@}{sH(#Ta
data[k] = temp[j--]; }lgqRg)F9[
b = temp[j]; X$O,L[] 4
} (BC3[R@/l
} }9=\#Le~\
} O_f|R1G5z
o} #nf$v(
/** 9Byk/&$U
* @param data Z`xz|:D+
* @param l PL8{|Q
* @param i ~'WvIA (
*/ ufdC'2cp8
private void insertSort(int[] data, int start, int len) { tR5zlm(}
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); TJ9,c2d+
} DA oOs}D
} :):=KowI
} ,q#^_/?
} 2#'[\*2|N
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堆排序： !oU$(,#9
!MB%
package org.rut.util.algorithm.support; Z'GOp?
US)wr
import org.rut.util.algorithm.SortUtil; qEE3x>&T]
Z*kGWL
/** i:WHql"Kw_
* @author treeroot V/+r"le
* @since 2006-2-2 a4,bP*H
* @version 1.0 Do(7LidC5
*/ {e2 (
public class HeapSort implements SortUtil.Sort{ [E(DGt
-p>KFHj6
/* (non-Javadoc) ewgcpV|spn
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @2 dp5
*/ asR6,k
public void sort(int[] data) { 5;V#Z@S
MaxHeap h=new MaxHeap(); r2.87
h.init(data); /U1GxX:P,
for(int i=0;i h.remove(); dUn8Xqj1
System.arraycopy(h.queue,1,data,0,data.length); o})4Jt1vj
} uw+v]y
8Es]WR5 ^
private static class MaxHeap{ @hm%0L
TE*$NxQ 2
void init(int[] data){ 0+8ThZ?n
this.queue=new int[data.length+1]; bF'~&<c
for(int i=0;i queue[++size]=data; 76)(G/
fixUp(size); j:|60hDz^
} mf@YmKbp
} UL[4sv6\9
~`hI|i<]
private int size=0; R*TCoEKO
8N6a=[fv<
private int[] queue; ^lu)'z%6
h^>kjMM
public int get() { -p ) l63
return queue[1]; O6OP{sb
} 9Pd~
a-Cp"pKlVY
public void remove() { PZpwi?N
SortUtil.swap(queue,1,size--); ,-c(D-&
fixDown(1); OP2!lEs
} da!N0\.1T
file://fixdown HtEjM|zj
private void fixDown(int k) { 8Mg4y1)RU
int j; /Fh"Gl^
while ((j = k << 1) <= size) { qPE(Lt1
if (j < size %26amp;%26amp; queue[j] j++; VR_+/,~
if (queue[k]>queue[j]) file://不用交换 Q|gun}
break; D5T\X-+]O
SortUtil.swap(queue,j,k); ; Z61|@Y
k = j; ]-%ZN+
} ]rn!+z
} vG\]xM'u
private void fixUp(int k) { w}NgFrL
while (k > 1) { A i9*w?C
int j = k >> 1; K;6K!6J:[
if (queue[j]>queue[k]) #Opfc8pm'
break; FPMhHHM
SortUtil.swap(queue,j,k); 4,s: G.g
k = j; 'cw0FpQ;
} ~c?yHpZx%
} 4PD"[a="
UXQ{J5Ox+
} j\dkv_L
":7cZ1VN2
} 8<!qT1
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SortUtil： /gy;~eB01
o;];ng
package org.rut.util.algorithm; r.i.w0B(
4C01=,6ye
import org.rut.util.algorithm.support.BubbleSort; !kASEjFz|f
import org.rut.util.algorithm.support.HeapSort; ZFW}Vnl
import org.rut.util.algorithm.support.ImprovedMergeSort; >w j7Y`
import org.rut.util.algorithm.support.ImprovedQuickSort; jI;bVG
import org.rut.util.algorithm.support.InsertSort; q3NS?t!
import org.rut.util.algorithm.support.MergeSort; tO[+O=d
import org.rut.util.algorithm.support.QuickSort; GetUCb%1
import org.rut.util.algorithm.support.SelectionSort; nZ\,ZqV
import org.rut.util.algorithm.support.ShellSort; aE#ZTc=
h*%T2
/** &1Cq+YpI
* @author treeroot d'[aOH4}
* @since 2006-2-2 0E\R\KO$>
* @version 1.0 D<++6HN&#
*/ 6-KC[J^Xo
public class SortUtil { ~O1*]
public final static int INSERT = 1; 0^E!P>
public final static int BUBBLE = 2; :WA o{|&
public final static int SELECTION = 3; {tR=D_5
public final static int SHELL = 4; @%\ANM$S
public final static int QUICK = 5; 'hya#rC&(
public final static int IMPROVED_QUICK = 6; m qw!C
public final static int MERGE = 7; lmmyDg1R
public final static int IMPROVED_MERGE = 8; [7I|8
public final static int HEAP = 9; )&dhE^ O
d}l^yln
public static void sort(int[] data) { cC}s5`
sort(data, IMPROVED_QUICK); VpVw:Rh>
} huKz["]z[
private static String[] name={ p*npY"}v
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" YSa:"A
}; hq,;H40%/
[tD*\\IA
private static Sort[] impl=new Sort[]{ e/Q[%y.X
new InsertSort(), 5\4>H6
new BubbleSort(), o~4n8
new SelectionSort(), !zJ.rYZ=g`
new ShellSort(), c(Ha"tBJ
new QuickSort(), rM=Hd/ki5
new ImprovedQuickSort(), {eZj[*P
new MergeSort(), #[KwR\b{:+
new ImprovedMergeSort(), ok6e=c '
new HeapSort() :T{or-
}; 8dA/dMQ
$s]@%6f
public static String toString(int algorithm){ iMA)(ZS
return name[algorithm-1]; ZcWl{e4
} Y}?@Pm drz
E,6E-9
public static void sort(int[] data, int algorithm) { rk. UW
impl[algorithm-1].sort(data); \FKIEg+(2
} =oh6;Ojt
XdS<51 C
public static interface Sort { $1dI
public void sort(int[] data); |Q I3H]T7
} +;!w;t
F_r eBPx
public static void swap(int[] data, int i, int j) { /uyQ>Y*-\Y
int temp = data; 4Dd9cG,lN
data = data[j]; RsOK5XnQn
data[j] = temp; "LxJPt\
} @2$8o]et
} }`M6+.z3F