[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; gS VWv9+
} 78u9> H
int i1=l; :"im2J
int i2=mid+1; |<2g^ZK)
for(int cur=l;cur<=r;cur++){ :U{$G( <
if(i1==mid+1) GJeP~
data[cur]=temp[i2++]; 26K sP .-
else if(i2>r) s+fjQo4
data[cur]=temp[i1++]; Kn#CIFbBN
else if(temp[i1] data[cur]=temp[i1++]; LA9'HC(5
else $eSSW+8q"
data[cur]=temp[i2++]; O_S%PX
} $yoIz.?V
} f6$$e+
GxynLXWo>
} V1]QuQ{&s
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改进后的归并排序: Quts~Q
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package org.rut.util.algorithm.support; xj#anr
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import org.rut.util.algorithm.SortUtil; z&Kh$ $)[
6[k7e!&
/** .Xm?tC<
* @author treeroot K'@lXA:
* @since 2006-2-2 hN"cXz"/
* @version 1.0 3!*qB-d
*/ x o{y9VS
public class ImprovedMergeSort implements SortUtil.Sort { :T9 P9<
N~)RR {$w
private static final int THRESHOLD = 10; Kt*kARN?
N'@E^ rYc
/* Ij{ K\{y
* (non-Javadoc) |!?lwBs4
* $E@U-=m
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =3H*%
*/ k;~*8i=%,\
public void sort(int[] data) { ObzFh?W
int[] temp=new int[data.length]; PJn|
mergeSort(data,temp,0,data.length-1); 2E$K='H:,
} v1aE[Q
AcQmY?
private void mergeSort(int[] data, int[] temp, int l, int r) { gK_#R]
int i, j, k; b.#0{*/G
int mid = (l + r) / 2; =c34MY(#X
if (l == r) d&owS+B{48
return; M/5+AsT
if ((mid - l) >= THRESHOLD) tm|YUat$]r
mergeSort(data, temp, l, mid); :={rPj-nU
else #!>QXiyR
insertSort(data, l, mid - l + 1); ?#obNQ"u]
if ((r - mid) > THRESHOLD) k+%c8w 9
mergeSort(data, temp, mid + 1, r); T$&vk#qr
else KfkU_0R+~v
insertSort(data, mid + 1, r - mid); vo!QJ
{;^GKb+
for (i = l; i <= mid; i++) { 1>'xmp+#
temp = data; -E+LA
} ?Hrj}K27
for (j = 1; j <= r - mid; j++) { m+=L}[
temp[r - j + 1] = data[j + mid]; "*HVL
} !S}d?8I6
int a = temp[l]; nqC@dHP
int b = temp[r]; qbq.r&F&
for (i = l, j = r, k = l; k <= r; k++) { 8\Uy
if (a < b) { h~-cnAMt
data[k] = temp[i++]; `s|^
a = temp; v"8i2+j
} else { EHF dQ0gIa
data[k] = temp[j--]; \}EJtux q
b = temp[j]; q!Q*T^-rO
} i0g/'ZP
} I2^@>/p8\(
} F [S'l
rGgP9 (
/** u_'XUJ32!
* @param data )tp;2rJ/
* @param l ]r@CmwC
* @param i $l/w.z
*/ %Y-KjSs+l
private void insertSort(int[] data, int start, int len) { )=Ens=>Z
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); C)(/NGf
} !9]q+XefJ
} :P?zy|aBi
} |TQa=
} Rwe!xY^d8
w@i;<LY.
堆排序： W;^6=(&xn
#%{x*y:Ms
package org.rut.util.algorithm.support; .gs:.X)TG9
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import org.rut.util.algorithm.SortUtil; abtYa
^<`uyY))Q
/** 5]F4.sa
* @author treeroot ;uyQR8
* @since 2006-2-2 +Cs.v.GA5
* @version 1.0 >goG\y
*/ 9ohO-t$XkY
public class HeapSort implements SortUtil.Sort{ ot; ]?M
SS7C|*-Zd
/* (non-Javadoc) D22jWm2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) UYkuz
*/ U`kO<ztk
public void sort(int[] data) { gI{56Z
MaxHeap h=new MaxHeap(); Sp./*h\}
h.init(data); "Ax#x
for(int i=0;i h.remove(); p.RSH$]
System.arraycopy(h.queue,1,data,0,data.length); aSH =|Jnc
} 6>F1!Q
miEf<<L#z
private static class MaxHeap{ VdE$ig@
@q<d^]po
void init(int[] data){ is6d:p
this.queue=new int[data.length+1]; LR%P\~
for(int i=0;i queue[++size]=data; mt]50}eK
fixUp(size); ?(E?oJ)(
} jU!ibs}R3
} t6! B
GK[[e~#u
private int size=0; QB6. o6
6(-c$d`C.0
private int[] queue; ,'a[1RN
3&5AbIZ
public int get() { [9,34/i
return queue[1]; my*E7[
} ,%$Cfu
YE[{Y(5;q
public void remove() { 9YVr9BM'K
SortUtil.swap(queue,1,size--); 6UAw9 'X8
fixDown(1); K(heeZUt
} [5wU0~>'
file://fixdown ucX!6)Op
private void fixDown(int k) { '$y.`/$
int j; w(UZmZb}
while ((j = k << 1) <= size) { oG' 'my#3
if (j < size %26amp;%26amp; queue[j] j++; =0mXTY1
if (queue[k]>queue[j]) file://不用交换 $x;(C[
break; &O|qx~(
SortUtil.swap(queue,j,k); UmOK7SPi
k = j; qd@Fb*
} Bt(U,nFB
} (/gMtIw
private void fixUp(int k) { )g[7XB/w
while (k > 1) { (F'?c1
int j = k >> 1; 6;p"xC-
if (queue[j]>queue[k]) *#c^.4$'
break; M(#]NTr ~4
SortUtil.swap(queue,j,k); Qo])A6$IU
k = j; 3im2 `n
} )mE67{YJh~
} mL]5Tnc
BBHoD:l
} by*v($
G ;
} ;-d2~1$
y0\=F
SortUtil： h45RwQ5Z
=`MMB|{6
package org.rut.util.algorithm; != u S
Z8q*XpUH
import org.rut.util.algorithm.support.BubbleSort; TM0DR'.
import org.rut.util.algorithm.support.HeapSort; l4Qv$
import org.rut.util.algorithm.support.ImprovedMergeSort; &C.m*^`^
import org.rut.util.algorithm.support.ImprovedQuickSort; RxXiSc`^z
import org.rut.util.algorithm.support.InsertSort; S@6 :H"
import org.rut.util.algorithm.support.MergeSort; {!37w[s~
import org.rut.util.algorithm.support.QuickSort; Ctpc]lJ}
import org.rut.util.algorithm.support.SelectionSort; u#`'|ko\9
import org.rut.util.algorithm.support.ShellSort; z[*Y%o8-r
L;'C5#GN
/** ?v$1Fc55
* @author treeroot [A46WF>L
* @since 2006-2-2 HRW}Yl
* @version 1.0 W24n%Ps
*/ ge!Asm K
public class SortUtil { GL'zNQP-
public final static int INSERT = 1; *Fz#x{zt
public final static int BUBBLE = 2; ErY-`8U"
public final static int SELECTION = 3; f$]ttU U
public final static int SHELL = 4; </33>Fu)
public final static int QUICK = 5; ( Y)a`[B
public final static int IMPROVED_QUICK = 6; n_1,-(t
public final static int MERGE = 7; zJT,Hv .
public final static int IMPROVED_MERGE = 8; Qm2(Z8Gh
public final static int HEAP = 9; 'Z`fZ5q
_VI3b$
public static void sort(int[] data) { ~=9]M.$
sort(data, IMPROVED_QUICK); )ioIn`g^-
} fhbILg
private static String[] name={ ;ksxz
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 8I%N^G
}; Xr$hQbl5D
d{~Qd|<rr
private static Sort[] impl=new Sort[]{ ^=Egf?|[
new InsertSort(), :IX_}|
new BubbleSort(), cvO;xR
new SelectionSort(), <G#z;]N
new ShellSort(), #Q$`3rr
new QuickSort(), m`H9^w%W
new ImprovedQuickSort(), QliP9-im3
new MergeSort(), XaR(~2
new ImprovedMergeSort(), g@IYD
new HeapSort() wm s@1~I
}; rKr2 K'
IXt cHAgX
public static String toString(int algorithm){ UCS`09KNJ
return name[algorithm-1]; =%R|@lz_x
} f f_| 3G
$-;x8O]u
public static void sort(int[] data, int algorithm) { +d/^0^(D\5
impl[algorithm-1].sort(data); \X0wr%I
} b%M|R%)]
[Se0+\,&
public static interface Sort { 8!VFb+
public void sort(int[] data); 6jo+i[h
} ?KtvXTy{m
<nE|Y@S
public static void swap(int[] data, int i, int j) { <n|.Z-gF\
int temp = data; Q5pm^X._j
data = data[j]; jN^09T49
data[j] = temp; ~[9(}UM
} 70{fl 4J5
} |,OTGZgc