[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; I#M3cI!X?
} ;!4gDvm
int i1=l; RP&bb{Y
int i2=mid+1; l]R0r{{
for(int cur=l;cur<=r;cur++){ Wp=3heCa6
if(i1==mid+1) ~f1g"
data[cur]=temp[i2++]; f&^(f1WO
else if(i2>r) pIJXP$v3
data[cur]=temp[i1++]; +$,Re.WnP
else if(temp[i1] data[cur]=temp[i1++]; O<gfZ>
else FRBu8WW0L
data[cur]=temp[i2++]; n{;j
} 'x!\pE-
} afEa@et'
V)`2Kw
} @p+;iS1}
!+T1kMP+l
改进后的归并排序: 5AYOM=O]t
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package org.rut.util.algorithm.support; <\aeC2~M
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import org.rut.util.algorithm.SortUtil; ut{T:kT
j9+$hu#a
/** >gk_klLh
* @author treeroot +2~kHrv
* @since 2006-2-2 ,kN;d}bg
* @version 1.0 #<im?
*/ ETe4I`d{
public class ImprovedMergeSort implements SortUtil.Sort { !_<6}:ZB
ji"g)d6
private static final int THRESHOLD = 10; 7RAB"T;?Q
ISbs l=F
/* P#,u9EIJ
* (non-Javadoc) QHEtG2
* f!Q\M1t)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) T~TP
*/ ggr
public void sort(int[] data) { \hB BG8=&
int[] temp=new int[data.length]; )O]T}eI
mergeSort(data,temp,0,data.length-1); @;Ttdwg#J
} =l,P'E
mPV<a&U
private void mergeSort(int[] data, int[] temp, int l, int r) { kSQ8kU_w+
int i, j, k; ':'g!b`/
int mid = (l + r) / 2; ly[LF1t
if (l == r) E$e7(D
return; ~4S$+*'8
if ((mid - l) >= THRESHOLD) 3FEJ 9ZyG
mergeSort(data, temp, l, mid); b'H'QY
else k*.]*]
insertSort(data, l, mid - l + 1); I2ek`t]
if ((r - mid) > THRESHOLD) &|>+LP@8
mergeSort(data, temp, mid + 1, r); 24mdhT|
else yBIlwN`kB
insertSort(data, mid + 1, r - mid); Y?T{>"_W
`BPTcL<W
for (i = l; i <= mid; i++) { %`vzQt`>
temp = data; w2)Ro:G
} <AHpk5Sn{
for (j = 1; j <= r - mid; j++) { uy'ghF
temp[r - j + 1] = data[j + mid]; W? iA P
} Qw5nfg3T
int a = temp[l]; Wgq|Q*
int b = temp[r]; XH:*J+$O
for (i = l, j = r, k = l; k <= r; k++) { z*y!Ml1
if (a < b) { `&$8/_`
data[k] = temp[i++]; ${+u-Wfau
a = temp; c8qr-x1HG
} else { 8sG3<$Z^
data[k] = temp[j--]; $Gn.G_"v
b = temp[j]; e%4?-{(
} TOYK'|lwM
} WL$^B@gXQ
} INZVe(z
yqK4 "F&
/** 6K $mW
* @param data \u3\TJ
* @param l Pf?kNJ*Tv)
* @param i *dzZOe>,
*/ YeX*IZX8
private void insertSort(int[] data, int start, int len) { i%glQT
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); +8=$-E=
} =lXj%V^8N
} ]|;+2@kDR
} (}"D x3K
} ,w }Po
'm%{Rz>j
堆排序： R;& >PFmq
8#I>`z^F
package org.rut.util.algorithm.support; T:|/ux3
eE;tiX/
import org.rut.util.algorithm.SortUtil; -wlj;U
0ju1>.p
/** q!c(~UVw
* @author treeroot ZSMed(//b
* @since 2006-2-2 ]-PzN'5\'
* @version 1.0 I0=_=aZO(
*/ ]`E+HLEQ'
public class HeapSort implements SortUtil.Sort{ ,!ZuH?Z
2pS<;k`
/* (non-Javadoc) Ae)xFnuq3
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4 23zX6
*/ CU$khz"
public void sort(int[] data) { aM^iDJ$>
MaxHeap h=new MaxHeap(); )oEVafNsT
h.init(data); :fRXLe1=
for(int i=0;i h.remove(); Vs>Pv$kW
System.arraycopy(h.queue,1,data,0,data.length); JFq wC=-
} Pg4&}bX:I
C \ Cc[v
private static class MaxHeap{ e_BG%+;G,
vL/ 3(Bo7
void init(int[] data){ C3AWXO ^
this.queue=new int[data.length+1]; 2`yhxO
for(int i=0;i queue[++size]=data; x"W~m.y$h
fixUp(size); [+#m THX
} e4X df>B
} N&8TG
HN47/]"*
private int size=0; WxdQ^#AE
)cfi@-J+#
private int[] queue; g14*6O:
#kg`rrFr
public int get() { _iwG'a[`
return queue[1]; 4"@<bKx
} aCQtE,.
a"~o'W7
public void remove() { _8K+iqMZG
SortUtil.swap(queue,1,size--); z,HhSW?&^
fixDown(1); a|ftl&uk
} KaIKb=4L|
file://fixdown V>$( N/1
private void fixDown(int k) { "SF0b jG9C
int j; H$6RDMU
while ((j = k << 1) <= size) { wNONh`b
if (j < size %26amp;%26amp; queue[j] j++; ,'NasL8?We
if (queue[k]>queue[j]) file://不用交换 .^YxhUH,G
break; 5<?Ah+1
SortUtil.swap(queue,j,k); 337.' |ZE
k = j; ROO*/OOd
} ?7{U=1gb$
} |%_C$s%
private void fixUp(int k) { *%-<Ldv
while (k > 1) { .soCU8i3
int j = k >> 1; }A9#3Y|F
if (queue[j]>queue[k]) Xj?Wvt
break; QxT'\7f
SortUtil.swap(queue,j,k); ~C-Sr@ a?/
k = j; *miG<
} #ydold{F
} #J5BHY~
[hJ1]RW8
} [X(m[u'%
jzvK;*N
} {sTf4S\S
BU nujC
SortUtil： ,5'o>Y
<,.$U\W
package org.rut.util.algorithm; D(cD8fn,J
b#2)"V(
import org.rut.util.algorithm.support.BubbleSort; uLms0r\@!
import org.rut.util.algorithm.support.HeapSort; zal]t$z>
import org.rut.util.algorithm.support.ImprovedMergeSort; IrwQ~z3I
import org.rut.util.algorithm.support.ImprovedQuickSort; #-az]s|N
import org.rut.util.algorithm.support.InsertSort; ^[ae )}
import org.rut.util.algorithm.support.MergeSort; {9IRW\kn
import org.rut.util.algorithm.support.QuickSort; W5jwD
import org.rut.util.algorithm.support.SelectionSort; >OG189O
import org.rut.util.algorithm.support.ShellSort; z%&FLdXgW+
o$_0Qs$
/** GT>'|~e
* @author treeroot <J%qzt}
* @since 2006-2-2 T/$gnn
* @version 1.0 w+$$uz
*/ /%$Zm^8c
public class SortUtil { LUbhTc
public final static int INSERT = 1; iUKjCq02
public final static int BUBBLE = 2; U#<d",I
public final static int SELECTION = 3; 2g(_Kdj*{
public final static int SHELL = 4; qLR;:$]Q&8
public final static int QUICK = 5; +in)(a.
public final static int IMPROVED_QUICK = 6; ?pL|eS7
public final static int MERGE = 7; cS&KD@.
public final static int IMPROVED_MERGE = 8; O7.V>7Y9H
public final static int HEAP = 9; UlXm4\@
*i#2>=)
public static void sort(int[] data) { Zy0M\-Mn
sort(data, IMPROVED_QUICK); VPN 9 Ql=
} zzG=!JR
private static String[] name={ O{:{P5
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Y A.&ap
}; DJ ru|2
B<W}:>3
private static Sort[] impl=new Sort[]{ -:}vf?
new InsertSort(), VPCI5mS_
new BubbleSort(), ^}j~:EZb
new SelectionSort(), b1xE;0uR
new ShellSort(), Q0*E&;|
new QuickSort(), 8X;?fjl`"
new ImprovedQuickSort(), g$(Y\`zw
new MergeSort(), y"?`MzcJ0
new ImprovedMergeSort(), qxRsq&_
new HeapSort() lL}6IZ5sb
}; >=k7#av
a%q,P @8
public static String toString(int algorithm){ %PW-E($o<
return name[algorithm-1]; :?f<tNU$
} k|fM9E
5 nt3gVy
public static void sort(int[] data, int algorithm) { 1q}32^>+o
impl[algorithm-1].sort(data); +\dVC,,=^g
} $G=^cNB|JB
C&O8fNB_
public static interface Sort { AArLNXzVW
public void sort(int[] data); l&& i`
} 3h bHS~
>^8O:.
public static void swap(int[] data, int i, int j) { kV-<[5AWW
int temp = data; Z<U,]iZB
data = data[j]; 8~y!X0Ov!
data[j] = temp; 6Ga'_P:
} [[T7s(3
} ueg%yvO