[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; 5kw K%
} Gw3+TvwU+Q
int i1=l; QIMd`c
int i2=mid+1; S'34](9n6
for(int cur=l;cur<=r;cur++){ Y"bm4&'
if(i1==mid+1) B-N//ef}
data[cur]=temp[i2++]; 9JP:wE~y
else if(i2>r) > f X^NX
data[cur]=temp[i1++]; UxNn5(:sM@
else if(temp[i1] data[cur]=temp[i1++]; HNS^:XR
else P}8hK
data[cur]=temp[i2++]; [T_[QU:A
} aeUgr!
} 6d]4 %QT
a%Q`R;W
} c qCNk
):PN0.H8
改进后的归并排序: %cn1d>M+I
6"G(Iq'2t3
package org.rut.util.algorithm.support; "L]v:lg3
]Ik~TW&
import org.rut.util.algorithm.SortUtil; }&=l)\e
OU%"dmSDk
/** P_3IFHe
* @author treeroot VYb,Hmm>kC
* @since 2006-2-2 Ld*Ds!*'/
* @version 1.0 #a=]h}&1?
*/ *,G<X^
public class ImprovedMergeSort implements SortUtil.Sort { [Ix6ArY
f?.VVlD
private static final int THRESHOLD = 10; )8oyo~4?
.t\J@?Z
/* LmJjO:W}^y
* (non-Javadoc) 4ct-K)Ris
* $V3If
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) L?nhm=D
*/ MXaik+2
public void sort(int[] data) { >bV3~m$a+
int[] temp=new int[data.length]; |.Vgk8oTl
mergeSort(data,temp,0,data.length-1); v];YC6shx
} 8i] S[$Fc
<fHHrmZ#/.
private void mergeSort(int[] data, int[] temp, int l, int r) { P s>Y]
int i, j, k; i}8OaX3x
int mid = (l + r) / 2; _qPKdGoM
if (l == r) 7fypUQ:y
return; t+A*Ws*o
if ((mid - l) >= THRESHOLD) %R4 \[e
mergeSort(data, temp, l, mid); Rp2h[_>
else 00;SK!+$
insertSort(data, l, mid - l + 1); +Iuu8t
if ((r - mid) > THRESHOLD) &V+_b$
mergeSort(data, temp, mid + 1, r); m<j;f
else >uZc#Zt
insertSort(data, mid + 1, r - mid); Hx+r9w
.^A4w;jPU
for (i = l; i <= mid; i++) { D,..gsg
temp = data; ^/?7hbr
} |s/Kb]t
for (j = 1; j <= r - mid; j++) { r(wf>w3
temp[r - j + 1] = data[j + mid]; VOj7Tz9UD
} mQVlE__ub
int a = temp[l]; U~BR8]=G
int b = temp[r]; /D9#v1b
for (i = l, j = r, k = l; k <= r; k++) { _}47U7s8
if (a < b) { 2|?U%YrHWs
data[k] = temp[i++]; "\Dqtr w
a = temp; pWE(?d_M{G
} else { H5d@TB,`
data[k] = temp[j--]; 56YqYu.
b = temp[j]; ='.b/]!_
} 0 J"g"=
} 7)D[}UXz
} b'^<0c
U= GJuixy
/** 5+{oQs_
* @param data e%:vLE 9
* @param l |^Yz*r?BJ
* @param i D@X"1X!F`G
*/ 8)iI=,T*
private void insertSort(int[] data, int start, int len) { n'vdA !R
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); IIMf\JdM
} < (9 BO&
} f8K0/z
} j/oc+ M^
} U7U&^s6`
I3.JAoB>!
堆排序： 4#W$5_Ny
IX 6 jb"
package org.rut.util.algorithm.support; eI`%J3BxR
(5`(H.(
import org.rut.util.algorithm.SortUtil; A]QGaWK
}t(5n$go6
/** ;K l'[~z
* @author treeroot bRFZ:hu l
* @since 2006-2-2 ~~WY?I-
* @version 1.0 g@O?0,+1
*/ ShtV2}s|
public class HeapSort implements SortUtil.Sort{ Ot=nKdP}D
9:%')M&Q
/* (non-Javadoc) KJ&I4CU]^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) j-aTpN
*/ $bpu
public void sort(int[] data) { >G?*rg4
MaxHeap h=new MaxHeap(); .0/"~5
h.init(data); \v:Z;EbX
for(int i=0;i h.remove(); k=d_{2 ~
System.arraycopy(h.queue,1,data,0,data.length); sw1gpkX
} &)q>Z!C-l
^Hf?["m^@
private static class MaxHeap{ D?xR>Oo)
?Nt m5(R
void init(int[] data){ Su@V5yz
this.queue=new int[data.length+1]; 3&[d.,/
for(int i=0;i queue[++size]=data; _W Hi<,-
fixUp(size); &!:mL],
} u9q#L.Ij
} U7zd7O
`|nJAW3
private int size=0; v8\_6}*I
E2o8'.~Yd`
private int[] queue; " 5Pqvi
dJQwb
public int get() { vfDX~_N
return queue[1]; Iza#v0
} ,Cm1~ExJ
;)f,A)(Z
public void remove() { asvM/9
SortUtil.swap(queue,1,size--); 3# 0Nd"/0
fixDown(1); P_Gu~B!Y
} /&=y_%VR
file://fixdown {O=_c|u{N
private void fixDown(int k) { Y^#>3T
int j; >;M STHeW
while ((j = k << 1) <= size) { bjwl21;{
if (j < size %26amp;%26amp; queue[j] j++; ]~3a~
if (queue[k]>queue[j]) file://不用交换 ;&w_.j*Is
break; .db:mSrL
SortUtil.swap(queue,j,k); 2S@Cj{R(
k = j; nYC S %\"
} ?:vB_@
} r<dvo%I#|
private void fixUp(int k) { ~}D"8[ABj
while (k > 1) { ?*q-u9s9
int j = k >> 1; rV%;d[LB
if (queue[j]>queue[k]) ki`ur%h
break; !8 l&%
SortUtil.swap(queue,j,k); r;waT@&C
k = j; {A MAQ
} A$zC$9{0I
} ?56;<%0
s<C66z
} p)Ht =~
Ba%b]vp
} `ST;";7!
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SortUtil： zLS?:yq
maQDD*
package org.rut.util.algorithm; rc{F17~vX
oB!-JX9
import org.rut.util.algorithm.support.BubbleSort; bM W}.v!
import org.rut.util.algorithm.support.HeapSort; *$t=Lh
import org.rut.util.algorithm.support.ImprovedMergeSort; 7W/55ZTmJ
import org.rut.util.algorithm.support.ImprovedQuickSort; 1OK~*=/4
import org.rut.util.algorithm.support.InsertSort; XS0NjZW
import org.rut.util.algorithm.support.MergeSort; )Y1+F,C
import org.rut.util.algorithm.support.QuickSort; 9Pm|a~[m
import org.rut.util.algorithm.support.SelectionSort; =p8iYtI
import org.rut.util.algorithm.support.ShellSort; We"\nOP
l2!ztK1^
/** S U P
* @author treeroot u69G #
* @since 2006-2-2 :N4?W}r.
* @version 1.0 ,{RWs^W2
*/ %LL?'&&
public class SortUtil { I'R|B\
public final static int INSERT = 1; )4w3$Q
public final static int BUBBLE = 2; 90Z4saSUw
public final static int SELECTION = 3; y8di-d3_
public final static int SHELL = 4; ;ejtP #$
public final static int QUICK = 5; j{%'A
public final static int IMPROVED_QUICK = 6; 8;,(D#p
public final static int MERGE = 7; `C*psS
public final static int IMPROVED_MERGE = 8; bFIv}c+;
public final static int HEAP = 9; j4D`Xq2X
Zr!CT5C5
public static void sort(int[] data) { te3\MSv;O
sort(data, IMPROVED_QUICK); Ve\!:,(Y_
} a&n}pnEn)
private static String[] name={ LgSVEQb6\|
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" <qxqlEQT
}; s(Fxi|v;
=:^f6"p&Z
private static Sort[] impl=new Sort[]{ ueJ_F#y
new InsertSort(), n]_<6{: U
new BubbleSort(), wcDb| H&
new SelectionSort(), Ot!*,%sjQ
new ShellSort(), VSc)0eyn
new QuickSort(), 6~8X/ -02
new ImprovedQuickSort(), A0uA\E4q
new MergeSort(), qzE -y-9@
new ImprovedMergeSort(), % ELf7~
new HeapSort() r}XsJ$
}; p@=B\A]
3)~z~p7
public static String toString(int algorithm){ 3%V VG~[
return name[algorithm-1]; 1GgG9I
} {F$MZ2E
Gc:oSvm
public static void sort(int[] data, int algorithm) { &G!2T!xx
impl[algorithm-1].sort(data); ].*I Z
} 9Or
l:"zYcp%
public static interface Sort { 5sF?0P;ln
public void sort(int[] data); 'miY"L:| O
} |Z{ DU(?[b
q;qY#wD@
public static void swap(int[] data, int i, int j) { JiHk`e`
int temp = data; eRwm>l"fVV
data = data[j]; ^Ea^t.c}_
data[j] = temp; R)5zHCwOw
} h<f]hJ`ep
} *}NJ