[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; _lKZmhi
} )&{K~i;:
int i1=l; R #]jSiS
int i2=mid+1; )\;Z4x;]U
for(int cur=l;cur<=r;cur++){ q*![AzFh
if(i1==mid+1) i|)Su4Dw
data[cur]=temp[i2++]; 6&Juv
else if(i2>r) JPM))4YDR
data[cur]=temp[i1++]; L(>=BK*
else if(temp[i1] data[cur]=temp[i1++]; g @I6$Z
else 1=7jz]t
data[cur]=temp[i2++]; Hy"x
} ;< )~Y-
} oY~ Dg
~n')&u{
} Z4$cyL'$P
[ =x s4=
改进后的归并排序: 4F>Urh+
t&Os;x?To?
package org.rut.util.algorithm.support; /y7M lU9
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import org.rut.util.algorithm.SortUtil; W>(/ bX
./j,Z$|
/** vzel#
* @author treeroot Y!q!5Crfi
* @since 2006-2-2 -V"22sR]
* @version 1.0 Hd7,ZHj3^
*/ I2$T"K:eo
public class ImprovedMergeSort implements SortUtil.Sort { $GQ`clj<
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private static final int THRESHOLD = 10; :!;'J/B@..
I|-p3g8\
/* R:JX<Ba
* (non-Javadoc) Ll4bdz,
* H xV#WoYKj
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !|q<E0@w\
*/ plu$h-$d
public void sort(int[] data) { p47S^gW
int[] temp=new int[data.length]; &bz:K8c
mergeSort(data,temp,0,data.length-1); Fhz*&JC#
} }ZSQ>8a
'/Bidb?
private void mergeSort(int[] data, int[] temp, int l, int r) { UmnE@H"t$\
int i, j, k; e6X[vc|Y}
int mid = (l + r) / 2; -"Y{$/B
if (l == r) X1[CX&Am
return; j#~Jxv%n
if ((mid - l) >= THRESHOLD) m+{K^kr[
mergeSort(data, temp, l, mid); z|7zj/+g
else ~m1P_`T
insertSort(data, l, mid - l + 1); b96%")
if ((r - mid) > THRESHOLD) B()/.w?A
mergeSort(data, temp, mid + 1, r); fW`&'!
else kY,U8a3!
insertSort(data, mid + 1, r - mid); 1CPjil*eb
Iq+>qX
for (i = l; i <= mid; i++) { D47R
temp = data; dt[k\ !-v
} mDGn:oRj
for (j = 1; j <= r - mid; j++) { `6y{.$ z
temp[r - j + 1] = data[j + mid]; P X;Ed*y
} /:<IIqO.
int a = temp[l]; _UE)*l m+
int b = temp[r]; Uw-p758dD
for (i = l, j = r, k = l; k <= r; k++) { hqk}akXt
if (a < b) { h=kQ$`j6
data[k] = temp[i++]; 1iL'V-y
a = temp; 0w'j+
} else { Et"?8\"n7
data[k] = temp[j--]; zJM S=r
b = temp[j]; Sx*oo{Kk%
} ?6c-7QV
} j7FN\ cz
} ;o/>JHGj
Pi%%z
/** B,z<%DAE
* @param data >vrxP8_
* @param l zJ+8FWy:S
* @param i ,U)"WLmY
*/ Kx"<J@
private void insertSort(int[] data, int start, int len) { SxyONp.$\
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); &2-L.Xb
} ,:Vm6u!
} :RSz4
} EA.D}XC
} M,j(=hRJ/E
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堆排序： juAMAplf
2;L|y._`w
package org.rut.util.algorithm.support; !$A37j6
m`4R]L]
import org.rut.util.algorithm.SortUtil; 'B83m#HR#
q;5i4|
/** 6b8;}],|
* @author treeroot EzW)'Zzw~
* @since 2006-2-2 dk QaM@
* @version 1.0 @4%L36k
*/ ULc`~]
public class HeapSort implements SortUtil.Sort{ J68j=`Y
I"AYWo?
/* (non-Javadoc) Ub0/r$]DK
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $(s\{(Wn
*/ J" j.'.
public void sort(int[] data) { U%7i=Z{^Ks
MaxHeap h=new MaxHeap(); 5`~mmAUk;`
h.init(data); 8$|8`;I(
for(int i=0;i h.remove(); ""O"
System.arraycopy(h.queue,1,data,0,data.length); )Fd HV;K
} rQ4*k'lA:
4fh^[\
private static class MaxHeap{ 0s#vwK13
}MR1^
void init(int[] data){ 7;.xc{
this.queue=new int[data.length+1]; -Z4{;I[Q@
for(int i=0;i queue[++size]=data; +u@aJ_^
fixUp(size); X.ONa_
} 2c<&eX8"
} $=sXAK9
IUGz =%[
private int size=0; z sQo$p
i$^)UZJ&0
private int[] queue; [=uo1%
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public int get() { d#:3be{|&q
return queue[1]; %zC[KE*~
} SgMrce<;
HQ9f,<
public void remove() { F Kc;W
SortUtil.swap(queue,1,size--); E}CiQUx
fixDown(1); qP!eJ6[Nh"
} P ]N [y
file://fixdown =U OLT>!
private void fixDown(int k) { <VjJAu
int j; 3>zN/f
while ((j = k << 1) <= size) { Fhq9D{TeY,
if (j < size %26amp;%26amp; queue[j] j++; 6nDV1O5
if (queue[k]>queue[j]) file://不用交换 Gx?+9CV
break; ^x*nq3^h\
SortUtil.swap(queue,j,k); 4A{|[}!
k = j; nU+tM~C%a
} g}&hl"j
} k.h`Cji@
private void fixUp(int k) { W-RqN!snJ8
while (k > 1) { 8pLBt:
int j = k >> 1; IWVlrGyM
if (queue[j]>queue[k]) t<uYM
break; fBBa4"OK=
SortUtil.swap(queue,j,k); "_L?2ta
k = j; ci,+Bjc
} fkfZ>D^1
} ?wMHS4
q<e&0u4
} Vi!Q
Xog/O i
} Jsg I'
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SortUtil： :/YO ni1h
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package org.rut.util.algorithm; .=9s1~]
y$Zj?Dd#
import org.rut.util.algorithm.support.BubbleSort; >1L=,M
import org.rut.util.algorithm.support.HeapSort; PZ:u_*Vu`
import org.rut.util.algorithm.support.ImprovedMergeSort; I^*'.z!4Q
import org.rut.util.algorithm.support.ImprovedQuickSort; P`$12<\O1
import org.rut.util.algorithm.support.InsertSort; @ \.;b9
import org.rut.util.algorithm.support.MergeSort; ^s7,_!.Pq
import org.rut.util.algorithm.support.QuickSort; !2Dy_U=
import org.rut.util.algorithm.support.SelectionSort; |ifHSc.j<
import org.rut.util.algorithm.support.ShellSort; sfp,Lq`
9z m|Lbj
/** m(D]qYwh
* @author treeroot k0?ZYeHC
* @since 2006-2-2 Ue5O9;y]u
* @version 1.0 UIJx*
*/ x9>\(-uU
public class SortUtil { '6Qy/R
public final static int INSERT = 1; qg z*'_S
public final static int BUBBLE = 2; k>4qkigjc
public final static int SELECTION = 3; OQ/<-+<w
public final static int SHELL = 4; XCB?ll*^
public final static int QUICK = 5; bTmL5}n
public final static int IMPROVED_QUICK = 6; #$S}3 o
public final static int MERGE = 7; @z6!a
public final static int IMPROVED_MERGE = 8; i;\s.wrzH
public final static int HEAP = 9; WiNT;v[
PL0`d`TI
public static void sort(int[] data) { ~%w~-O2
sort(data, IMPROVED_QUICK); TmRxKrRs
} fT:}Lj\L1
private static String[] name={ PsjbR
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ]*"s\ix
}; XY7Qa!>7j
W@L3+4
private static Sort[] impl=new Sort[]{ [um&X=1V8
new InsertSort(), }m]q}r
new BubbleSort(), 33l>{(y
new SelectionSort(), 2H#N{>7
new ShellSort(), H(+<)qH
new QuickSort(), l'4AF| p
new ImprovedQuickSort(), D _X8-
new MergeSort(), 9>m%`DG*
new ImprovedMergeSort(), noVa=aU^
new HeapSort() 8``;0}'PC
}; <~Qi67I
U0B2WmT~Q
public static String toString(int algorithm){ GrJ#.
return name[algorithm-1]; BWPP5X9
} .,2V5D-${
HP2wtN{Zs
public static void sort(int[] data, int algorithm) { F:FMeg
impl[algorithm-1].sort(data); b=##A
} 8@K^|xeQ
q?{}3 dPC
public static interface Sort { c|p,/L09L
public void sort(int[] data); Aw^yH+ae
} Rz <OF^Iy
+}7fg82)
public static void swap(int[] data, int i, int j) { n"{X!(RIcx
int temp = data; kka"C]!
data = data[j]; <zfe}0
data[j] = temp; R zR?&J
} +`en{$%%
} wJ"ev.A)