[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; 1Cv#nhmp
} O#:&*Mv
int i1=l; {]`p&@
int i2=mid+1; f?^S bp
for(int cur=l;cur<=r;cur++){ =m9i)Q
if(i1==mid+1) )|MJnx9
data[cur]=temp[i2++]; oNIFx5*Z
else if(i2>r) 3$_*N(e
data[cur]=temp[i1++]; 7}%H2$Do
else if(temp[i1] data[cur]=temp[i1++]; HxIoA
else P6YQK+
data[cur]=temp[i2++]; B?3juyB`--
} hVM2/j
} r|fO7PD
Xpl?g=B&u
} Xm|ib%no
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改进后的归并排序: K6B4sE
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package org.rut.util.algorithm.support; K&dT(U
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import org.rut.util.algorithm.SortUtil; kiX%3(
gu<V(M\
/** \[ M_\&GC
* @author treeroot $;`I,k$0>~
* @since 2006-2-2 u-szt ?O|
* @version 1.0 :u/mTZDi
*/ `Mk4sKU\a
public class ImprovedMergeSort implements SortUtil.Sort { qfrNi1\9-
[!~}S
private static final int THRESHOLD = 10; q@ZlJ3%l,
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/* NXI[q'y
* (non-Javadoc) S-!=NX&C
* 0 iRR{a<
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "hPCQp`Tj
*/ <lj\#'G3
public void sort(int[] data) { R ]P;sk5
int[] temp=new int[data.length]; >1ZJ{se
mergeSort(data,temp,0,data.length-1); 6P*O&1hv
} sS9%3i/>
!ni>\lZ
private void mergeSort(int[] data, int[] temp, int l, int r) { %4,?kh``D
int i, j, k; m|F:b}0Hb
int mid = (l + r) / 2; <2<87PU
if (l == r) x=*L-
return; aWGon]2p
if ((mid - l) >= THRESHOLD) ^npJUa
mergeSort(data, temp, l, mid); }C,O
else ;Z9IZ~
insertSort(data, l, mid - l + 1); B4Lx{uno
if ((r - mid) > THRESHOLD) ,S!w'0k|n
mergeSort(data, temp, mid + 1, r); CW`!}yu%
else f Iy]/
insertSort(data, mid + 1, r - mid); >emcJVYV`[
*||d\peQ
for (i = l; i <= mid; i++) { g_z/{1$
temp = data; .'d2J>~N
} 3n48%5
for (j = 1; j <= r - mid; j++) { }ZzLs/v%X
temp[r - j + 1] = data[j + mid]; u|fXP)>.
} ]db@RbaH
int a = temp[l]; kg>>D
int b = temp[r]; o@k84+tn(
for (i = l, j = r, k = l; k <= r; k++) { A5nO=
if (a < b) { wa:0X)KC?
data[k] = temp[i++]; Nfn(Xn*J-
a = temp; c\.P/~
} else { ,.v7FM^gO
data[k] = temp[j--]; 7bF*AYM
b = temp[j]; Y7SacRO
} CdZ BG
} v\%G|8+]
} 33a uho
L`[z[p{?
/** 79BaDB`{a
* @param data `.v(fC
* @param l s|-FH X
* @param i ( u`W!{1\
*/ HOZRYIQB
private void insertSort(int[] data, int start, int len) { !'0S0a8
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); >NM\TLET~
} Bs!4H2@{(]
} FxRXPt FK
} r;gP}H ?
} y%cO#P@
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堆排序： S$[k Q|Am
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package org.rut.util.algorithm.support; NlF}{
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import org.rut.util.algorithm.SortUtil; Vrp[r *V@E
'C>U=cE7
/** q_t4OrLr=
* @author treeroot ?c#$dc"
* @since 2006-2-2 ,pt%) c
* @version 1.0 8;"*6vHZ
*/ (^n*Am;zlH
public class HeapSort implements SortUtil.Sort{ 51xk>_Hm}|
#T3h}=
/* (non-Javadoc) ziEz.Wn"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^^Jnv{)
*/ 9|WV~
public void sort(int[] data) { ga0'zo9K
MaxHeap h=new MaxHeap(); Ph,-sR
h.init(data); cQUC.TZ_
for(int i=0;i h.remove(); i7Z=|&
System.arraycopy(h.queue,1,data,0,data.length); ]axh*J3`i
} *xs!5|n+
kB P*K
private static class MaxHeap{ )S@jDaU<
:`Az/U[
void init(int[] data){ .EP6oKA
this.queue=new int[data.length+1]; `-UJ /{
for(int i=0;i queue[++size]=data; 'Kbl3fUF
fixUp(size); QIU,!w-3X
} Is.WZYa
} 0l\y.
!<n"6KA.
private int size=0; |m G7XL,
0ejdKdYN
private int[] queue; 0 P|&Pq&IH
acW'$@y9?N
public int get() { G^Tk 20*
return queue[1]; W/+K9S25
} =o=1"o[
oC|WBS
public void remove() { \%A%s*1
SortUtil.swap(queue,1,size--); xN0*8
fixDown(1); V H^AcO
} A(d5G^
file://fixdown ktH8as^54!
private void fixDown(int k) { g:#dl\k
int j; !<\Br
while ((j = k << 1) <= size) { v"Jgw;3
if (j < size %26amp;%26amp; queue[j] j++; 5OP`c<
if (queue[k]>queue[j]) file://不用交换 lWZuXb,G
break; #D%ygh=
SortUtil.swap(queue,j,k); *cv}*D
k = j; !1sU>Xb4J
} .ln8|;%
} Iy7pt~DJ,
private void fixUp(int k) { k(s;,B\
while (k > 1) { O8u3y
int j = k >> 1; ~H6;I$e[
if (queue[j]>queue[k]) \h{r;#g
break; |M~ON=
SortUtil.swap(queue,j,k); %y`7);.q
k = j; yy2I2Bv
} cu7(.
} Q(@IK&v
D!LX?_cD1i
} 9'~-U
wz /GB8P
} P=8>c'Q
F?4(5 K
SortUtil： Ob<W/-%5tH
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package org.rut.util.algorithm; uGJ"!K
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import org.rut.util.algorithm.support.BubbleSort; _YHu96H;
import org.rut.util.algorithm.support.HeapSort; @,H9zrjVFZ
import org.rut.util.algorithm.support.ImprovedMergeSort; u5E]t9~Pq
import org.rut.util.algorithm.support.ImprovedQuickSort; Rm>^tu -
import org.rut.util.algorithm.support.InsertSort; j|(Z#3J
import org.rut.util.algorithm.support.MergeSort; c6AWn>H
import org.rut.util.algorithm.support.QuickSort; ]$iN#d|ZU
import org.rut.util.algorithm.support.SelectionSort; d^Di*&X
import org.rut.util.algorithm.support.ShellSort; 6XV<? 9q
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/** pa]"iZz
* @author treeroot #gbH^a'
* @since 2006-2-2 2y GOzc
* @version 1.0 i%{X9!*%TX
*/ .p6+l!"
public class SortUtil { 9s$U%F6}
public final static int INSERT = 1; .0y%5wz8j
public final static int BUBBLE = 2; `S/wJ'c
public final static int SELECTION = 3; g@v s*xE
public final static int SHELL = 4; fP-|+TyO
public final static int QUICK = 5; dE=Ue#1U@5
public final static int IMPROVED_QUICK = 6; )ZR+lX}
public final static int MERGE = 7; Qo0H
public final static int IMPROVED_MERGE = 8; r0dDHj~F
public final static int HEAP = 9; 6L4$vJ
M:SO2Czz
public static void sort(int[] data) { c+' =hR[
sort(data, IMPROVED_QUICK); &*,:1=p
} c|~6Ie
private static String[] name={ QB{rVI>mI!
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" }xb=<
}; OEgI_=B
le>Wm&E
private static Sort[] impl=new Sort[]{ m~l F`?
new InsertSort(), @9G- m(?*
new BubbleSort(), df*w>xS
new SelectionSort(), RuRt0Sd3
new ShellSort(), rjWLMbd.<
new QuickSort(), y9HK |
new ImprovedQuickSort(), 5F $V`kYT
new MergeSort(), =P77"Dd
new ImprovedMergeSort(), wzWbB2Mb5
new HeapSort() j) vlM+
}; !fkep=
dj9?t
public static String toString(int algorithm){ FH5ql~
return name[algorithm-1]; .m4;^S2cO
} [w\?j,
3K0tC=
public static void sort(int[] data, int algorithm) { `iShJz96
impl[algorithm-1].sort(data); JC;^--0(z
} u' Qd,
Xh+ia#K
public static interface Sort { hZ\+FOx;
public void sort(int[] data); 8nNsrat
} C'mL&
H}0dd"
public static void swap(int[] data, int i, int j) { !sSQQo2Sv
int temp = data; N+W&NlZ
data = data[j]; ~|+zJ5
data[j] = temp; !^fa.I'mM
} ^s/
} f<jb=\}x