[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; jL#`CD
} 8<X; 8R
int i1=l; D3;#:
int i2=mid+1; oei2$uu
for(int cur=l;cur<=r;cur++){ xAAwH@ +
if(i1==mid+1) iXuSFman
data[cur]=temp[i2++]; n]P,5
else if(i2>r) q{+Pf/M5
data[cur]=temp[i1++]; -f8iq[F5
else if(temp[i1] data[cur]=temp[i1++]; ,CQg6-[
else b*"%E,?
data[cur]=temp[i2++]; |jTRIMj%,_
} 7,Q>>%/0P
} 5'[b:YC
E(Y}*.\]#s
} J0x)NnWJ
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改进后的归并排序: :5BVVa0oR
jB%aHUF;
package org.rut.util.algorithm.support; W 33MYw
v,A8Mk2s#
import org.rut.util.algorithm.SortUtil; 5}"9)LT@@w
YS+|n%?
/** F'9#dR?
* @author treeroot L~>~a1p!
* @since 2006-2-2 'o]8UD(
* @version 1.0 RD0=\!w*5
*/ Y4I;-&d's
public class ImprovedMergeSort implements SortUtil.Sort { q!\4|KF~
bGe@yXId5
private static final int THRESHOLD = 10; .V`N^H:l
o0:RsODl
/* ($r-&]y
* (non-Javadoc) R*r;`x
* @pO2A6Ks
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4|Ay;}X \
*/ #8qhl
public void sort(int[] data) { 6$A>%Jtwe
int[] temp=new int[data.length]; "TP^:Ln
mergeSort(data,temp,0,data.length-1); :2(U3~3:
} 8zzY;3^h;
Y2Y)|<FH
private void mergeSort(int[] data, int[] temp, int l, int r) { HGlQZwf
int i, j, k; ~l"]J'jF"H
int mid = (l + r) / 2; bn6WvC3?
if (l == r) <3C/t|s
return; I::|d,bR!
if ((mid - l) >= THRESHOLD) ]YWz;Z
mergeSort(data, temp, l, mid); Dg o-Os@
else H[D<G9:
insertSort(data, l, mid - l + 1); F;sZc,Y,^
if ((r - mid) > THRESHOLD) 1j?+rs+o-
mergeSort(data, temp, mid + 1, r); _|I`A6`=
else jWqjGX`
insertSort(data, mid + 1, r - mid); \x;`8H
Bw25+l Px
for (i = l; i <= mid; i++) { ="J *v>
temp = data; YML]pNB
} bfXyuv
for (j = 1; j <= r - mid; j++) { L(+I
temp[r - j + 1] = data[j + mid]; U;#9^<^
} T1#r>3c\
int a = temp[l]; :kQydCuK
int b = temp[r]; Bvsxn5z+:
for (i = l, j = r, k = l; k <= r; k++) { < wi9
if (a < b) { m6Mko2
data[k] = temp[i++]; t4v@d
a = temp; HvzXAd
} else { jH>`:
data[k] = temp[j--]; ^Fpc8D,
b = temp[j]; Bht!+
} WJj5dqatV
} R,dbq4xkl
} 9wbj}tN\z
fs\A(]`$
/** M`)/^S9
* @param data a]nK!;>$
* @param l ?/|KM8
* @param i H5>?{(m
*/ a&RH_LjM
private void insertSort(int[] data, int start, int len) { )9i$ 1"a(
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); MUn(ZnQy|
} |ya.c\}q
} #pcgfVl
} W`v$-o-
} @8*lqV2
#+#^cqjZ
堆排序： n#^ii/H
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package org.rut.util.algorithm.support; A<''x'\/
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import org.rut.util.algorithm.SortUtil; 5.d[C/pRw
sOVU>tb\'
/** L Q0e@5
* @author treeroot l}SHR|7<
* @since 2006-2-2 o3YW(%cYR
* @version 1.0 C?j:+
*/ [h63*&
public class HeapSort implements SortUtil.Sort{ Z7XFG&@6
gVNoC-n)
/* (non-Javadoc) F.),|t$\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) s@IgaF {
*/ Z\3~7Ek2m
public void sort(int[] data) { &EmG\vfE
MaxHeap h=new MaxHeap(); L3=5tuQ[5
h.init(data); ,&.$r/x|?
for(int i=0;i h.remove(); C),i#v
System.arraycopy(h.queue,1,data,0,data.length); QQJf;p7
} -}3nIk<N
Vh{(*p
private static class MaxHeap{ Z@(KZ|
nF B]#LLv
void init(int[] data){ MXiQWg$
this.queue=new int[data.length+1]; dTjDVq&Hz
for(int i=0;i queue[++size]=data; 9y&bKB2,
fixUp(size); J6Vx7
} _\na9T~g
} F?^L^N^
:gO5#HIm
private int size=0; m!5Edo-;<
u}b%-:-
private int[] queue; gxx#<=`
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public int get() { 1YK(oRSDn
return queue[1]; [5!dO\-[
} (9R;-3vY:S
Gk]ZP31u
public void remove() { t{s*,X\b
SortUtil.swap(queue,1,size--); k!Q{u2
fixDown(1); eR0$CTSw
} DD2K>1A1
file://fixdown .+,U9e:%
private void fixDown(int k) { "9 f+F
int j; "([/G?QAG
while ((j = k << 1) <= size) { h+ud[atk.
if (j < size %26amp;%26amp; queue[j] j++; 3)yL#hXg)
if (queue[k]>queue[j]) file://不用交换 xHMFYt+0$G
break; R0%M9;>1
SortUtil.swap(queue,j,k); AmC?qoEWQ7
k = j; zy5FO<->
} n*Uk<_WA
} .G#li(NWH
private void fixUp(int k) { oC-v>&bW
while (k > 1) { yzv"sd[8N
int j = k >> 1; f,4erTBH
if (queue[j]>queue[k]) . P+Qu
break; MqJ5|C.q
SortUtil.swap(queue,j,k); t1]/Bw`j/
k = j; Vd(n2JMtG
} \ 'Va(}v
} 9z..LD(
ES?*w@x
} ?w+ V:D
_OC@J*4.
} BlQX$s]
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SortUtil： fjOq@thD
T;?k]4.X
package org.rut.util.algorithm; xJ2I@*DN
a|"Uw `pX+
import org.rut.util.algorithm.support.BubbleSort; > K?OsvX
import org.rut.util.algorithm.support.HeapSort; [}]yJ+)
import org.rut.util.algorithm.support.ImprovedMergeSort; rlD!%gG2x
import org.rut.util.algorithm.support.ImprovedQuickSort; *= ?|n
import org.rut.util.algorithm.support.InsertSort; 15hqoo9!
import org.rut.util.algorithm.support.MergeSort; Fj(GyPFG
import org.rut.util.algorithm.support.QuickSort; /0 4US5En
import org.rut.util.algorithm.support.SelectionSort; P:t .Nr"
import org.rut.util.algorithm.support.ShellSort; FF~r&h8H
%4f.<gz~r|
/** ~`C_B]3|
* @author treeroot O`Gq7=X
* @since 2006-2-2 vaGF(hfTA
* @version 1.0 HC/z3b;
*/ !3Pbu=(cte
public class SortUtil { !Av9?Q:
public final static int INSERT = 1; U(9_&sL
public final static int BUBBLE = 2; ^:]$m;v]
public final static int SELECTION = 3; y?3.W
public final static int SHELL = 4; ]jFl?LA%7
public final static int QUICK = 5; EG;E !0
public final static int IMPROVED_QUICK = 6; RQb}t,
public final static int MERGE = 7; @1Q-.54a
public final static int IMPROVED_MERGE = 8; KVJ, a
public final static int HEAP = 9; (Xcy/QT
? ep#s$i
public static void sort(int[] data) { bD{k=jum
sort(data, IMPROVED_QUICK); uO`MA% z<
} O|~C qb
private static String[] name={ EgU#r@7I
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" r]UF<*$
}; V@!)Pw
4uo`XJuQ
private static Sort[] impl=new Sort[]{ (rd [tc
new InsertSort(), }}{n|l+R5
new BubbleSort(), 8v4 o+wP
new SelectionSort(), #5Z`Q^
new ShellSort(), 'Vo8|?.WhX
new QuickSort(), Pps-,*m
new ImprovedQuickSort(), `om+p?j
new MergeSort(), {PcJuRTHB
new ImprovedMergeSort(), U~N7\Pa4
new HeapSort() <"J]u@|
}; dy&UF,l6
7l=;I%
public static String toString(int algorithm){ [/UchU]DT
return name[algorithm-1]; Z0jgUq`r
} /}(d'@8p
:Ko6.|
public static void sort(int[] data, int algorithm) { ~vFa\7sf
impl[algorithm-1].sort(data); ( %\7dxiK
} $+!dP{
1!~cPD'F
public static interface Sort { Y~-y\l;Tr
public void sort(int[] data); Ve3z5d:^
} UtQey ;w
ir6' \
public static void swap(int[] data, int i, int j) { *[3xc*5F/A
int temp = data; M 9t7y
data = data[j]; b.&WW
data[j] = temp; rtRbr_
} S3E,0%yo+)
} xi=ApwNj