[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; C'mL&
} Hgc=M
int i1=l; Oxx^[ju~
int i2=mid+1; ,w)p"[^b
for(int cur=l;cur<=r;cur++){ F phDF
if(i1==mid+1) $a;]_Y
data[cur]=temp[i2++]; 'Pltn{iq[
else if(i2>r) $ItF])Bj5N
data[cur]=temp[i1++]; HL{$ ^l#v
else if(temp[i1] data[cur]=temp[i1++]; wdE?SDs
else %'Xk)-+y
data[cur]=temp[i2++]; vR7HF*8
} k!XhFWb
} [THG4582oB
l95<QI
} &~sfYW
tx7~SUr
改进后的归并排序: V`hu,Y;%
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package org.rut.util.algorithm.support; xl4=++pu)
jdqj=Yc
import org.rut.util.algorithm.SortUtil; ctmQWrk|B
u62)QJE
/** }odV_WT
* @author treeroot |01?w|
* @since 2006-2-2 ,Fqz e/
* @version 1.0 pb;")Q'
*/ (zo^Nn9VJ
public class ImprovedMergeSort implements SortUtil.Sort { =d;Vk
!cEG}(|h
private static final int THRESHOLD = 10; $A\m>*@
ekSY~z=/u
/* :K.4n
* (non-Javadoc) P1zK2sL_
* !E\[SjY@J
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) b%(6EiUA
*/ Zy"=y+e!E;
public void sort(int[] data) { tB(4Eq \
int[] temp=new int[data.length]; WT3gNNx|
mergeSort(data,temp,0,data.length-1); ),^eA
} LX+5|u
;-mdi/*g
private void mergeSort(int[] data, int[] temp, int l, int r) { ik1tidw
int i, j, k; n(Y%Vmy
int mid = (l + r) / 2; rx~[Zs+*
if (l == r) .5HQ
return; <!^ [~`
if ((mid - l) >= THRESHOLD) cSP*f0n,eo
mergeSort(data, temp, l, mid); i^Ut015q%
else |KCOfVh?|.
insertSort(data, l, mid - l + 1); m7]hJ,0
if ((r - mid) > THRESHOLD) [G|mY6F^
mergeSort(data, temp, mid + 1, r); Y#V8(DTyH
else P<dy3;
insertSort(data, mid + 1, r - mid); VkmRh,T
;I6s-moq_
for (i = l; i <= mid; i++) { A/*%J74v
temp = data; Xg<[fwW
} ~fN%WZ;_
for (j = 1; j <= r - mid; j++) { UV7%4xM5v
temp[r - j + 1] = data[j + mid]; "u^EleE!
} m$Y :0_^-
int a = temp[l]; X!,@j\L
int b = temp[r]; Qu*1g(el!o
for (i = l, j = r, k = l; k <= r; k++) { _cI_#
if (a < b) { FY0%XW
data[k] = temp[i++]; $r.U
a = temp; LC69td&
} else { w:=V@-S8
data[k] = temp[j--]; (-yl|NFBw
b = temp[j]; [W,|kDK
} GUp;AoQ
} HZJL/=;
} (yrh=6=z
hXL|22>w<
/** U5ZX78>a
* @param data qc-,+sn(
* @param l GY!C|7kN
* @param i h^|5|l
*/ z5cYyx r>
private void insertSort(int[] data, int start, int len) { &k>aP0k"
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); `$;+g ,
} w_-+o^
} 1TJ0D_,
} s&PM,BFf
} |w&~g9
uGtV}-t:
堆排序： H?rg5TI0
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package org.rut.util.algorithm.support; fjz) Gp
7ETjn)%bs
import org.rut.util.algorithm.SortUtil; GuQRn
%uDG75KP{
/** Gm8E<iTP
* @author treeroot pK_?}~
* @since 2006-2-2 9(1rh9`=
* @version 1.0 #*$p-I=
*/ !rL<5L
public class HeapSort implements SortUtil.Sort{ kEN#u
%CH6lY=lI
/* (non-Javadoc) $^%N U
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0%C^8%(x
*/ C0C0GqN,
public void sort(int[] data) { H'g?llh1J
MaxHeap h=new MaxHeap(); 4cgIEw[6
h.init(data); 0irr7Y
for(int i=0;i h.remove(); =]>%t]
System.arraycopy(h.queue,1,data,0,data.length); 4*H"Z(HP
} >%%=0!,yX
X T>('qy
private static class MaxHeap{ *> 3Qd7
o+?@5zw-&
void init(int[] data){ htJuGfDx1
this.queue=new int[data.length+1]; 4jwu'7Q
for(int i=0;i queue[++size]=data; =7/-i
fixUp(size); = 1|"-
} [Eq<":)
} t8J/\f=
RVM&4#E
private int size=0; PXYE;*d(
{[OwMk
private int[] queue; 1=GI&f2I
)c<6Sfp^B
public int get() { aq>?vti1D
return queue[1]; M@7Xp)S"
} {[#(w75R{
8n)WW$
public void remove() { ]r"Yqv3
SortUtil.swap(queue,1,size--); -;c
fixDown(1); 6SEltm(
} yY=<'{!
file://fixdown c[(Pg%
private void fixDown(int k) { n~r 9!m$<
int j; wq0aF"k
while ((j = k << 1) <= size) { bH9Le
if (j < size %26amp;%26amp; queue[j] j++; 6].:.b\qQc
if (queue[k]>queue[j]) file://不用交换 XAic9SNu;
break; Z5)eREi=
SortUtil.swap(queue,j,k); R 1zC.m
k = j; 7>.OVh<
} ! q6hC
} `lCuU~~ag
private void fixUp(int k) { I0w%8bs
while (k > 1) { U6j/BJT"
int j = k >> 1; ^X1wI9V
if (queue[j]>queue[k]) &d^=siL
break; %$X\"
SortUtil.swap(queue,j,k); Xa,&ef&q
k = j; ^X?D#\
} i57( $1.
} 3:`XG2'
*8A6Q9YT
} /^<en(0=P
!D:k!
} F@SG((`
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SortUtil： /6tcSg)
3'#%c>_
package org.rut.util.algorithm; 8 njuDl
X#J6Umutm
import org.rut.util.algorithm.support.BubbleSort; \lr/;-zP
import org.rut.util.algorithm.support.HeapSort; (cV
import org.rut.util.algorithm.support.ImprovedMergeSort; rw u3Nb
import org.rut.util.algorithm.support.ImprovedQuickSort; *o4%ul\3Y|
import org.rut.util.algorithm.support.InsertSort; A~71i&
import org.rut.util.algorithm.support.MergeSort; ZgYZwc&-
import org.rut.util.algorithm.support.QuickSort; 'D6 bmz
import org.rut.util.algorithm.support.SelectionSort; qo;)X0N
import org.rut.util.algorithm.support.ShellSort; _Z#eS/,O@
8&(-8
/** 4XG]z_+I
* @author treeroot VXC4%
* @since 2006-2-2 %$n02"@
* @version 1.0 X>3^a'2,E
*/ iJnh$jo
public class SortUtil { h|W%4|]R)
public final static int INSERT = 1; TVkcDS
public final static int BUBBLE = 2; $I8[BYblB
public final static int SELECTION = 3; &9P<qU^N)
public final static int SHELL = 4; a@W7<9fY;
public final static int QUICK = 5; OlGR<X
public final static int IMPROVED_QUICK = 6; r%-n*_?.s
public final static int MERGE = 7; TA;,>f*
public final static int IMPROVED_MERGE = 8; uBeNXOre
public final static int HEAP = 9; ntHT
" i`8l.Lc
public static void sort(int[] data) { ^ KOzCLC
sort(data, IMPROVED_QUICK); 9q|7<raS
} 'lQYJ0
private static String[] name={ ~ x`7)3
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" otq,R6 ^
}; g!^J,e=
In(NF#
private static Sort[] impl=new Sort[]{ Mq+<mX7
new InsertSort(), Bl4 dhBZoO
new BubbleSort(), fN[n>%)VO<
new SelectionSort(), {j@+h%sF>+
new ShellSort(), -Enbcz(B
new QuickSort(), I~RcOiL)
new ImprovedQuickSort(), Phlk1*1n
new MergeSort(), \(u@F<s-
new ImprovedMergeSort(), WOb8"*OM
new HeapSort() # #>a&,
}; ptR
Xw(3j)xQ
public static String toString(int algorithm){ 2f{kBD
return name[algorithm-1]; AU`OESSI
} 7A0dl}:
O5MDGg
public static void sort(int[] data, int algorithm) { B9W/bJ6%
impl[algorithm-1].sort(data); "::9aYd!
} ~d+O/:=K_
.0 X$rX=
public static interface Sort { Q X):T#^V
public void sort(int[] data); V.j#E1P
} FO^24p
?*o;o?5s^
public static void swap(int[] data, int i, int j) { LDX y}hm)
int temp = data; ?N_)>&b
data = data[j]; +$~8)95<B
data[j] = temp; ZgBckb
} G5umeqYC
} n)CH^WHL&