[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; QYo04`Rl
} WZ?>F
int i1=l; }TMO>eB'
int i2=mid+1; ~2rQ80_
for(int cur=l;cur<=r;cur++){ K9xvog
if(i1==mid+1) F?2UHcs
data[cur]=temp[i2++]; 0a:oC(Ak
else if(i2>r) &l2xh~L
data[cur]=temp[i1++]; ?X|q
else if(temp[i1] data[cur]=temp[i1++]; {ax]t-ZwJ5
else Rf4K Rhi
data[cur]=temp[i2++]; Fvk=6$d2
} _$$.5?4
} }w4OCN\1
F,S)P`?
} u=nd7:bv
}@6Ze$>
改进后的归并排序: QD%xmP
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package org.rut.util.algorithm.support; 5OWyxO3{
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import org.rut.util.algorithm.SortUtil; P@UE.0NYX
"v?F4&\ 8
/** 0^>,
* @author treeroot H}GGUE&c*
* @since 2006-2-2 #:BkDidt2v
* @version 1.0 \12G,tBH
*/ Vc5>I_
public class ImprovedMergeSort implements SortUtil.Sort { ^*fD
+:^l|6%}
private static final int THRESHOLD = 10; 'v<v6vs
tUH?N/qn
/* \VhG'd3k
* (non-Javadoc) |qe;+)0>K
* d%k7n+ICQ4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \}h
*/ L<=Dl
public void sort(int[] data) { &u&WP
int[] temp=new int[data.length]; cy@Ri#
mergeSort(data,temp,0,data.length-1); b|.Cqsb
} 2R,} j@
f$:Y'$Z1
private void mergeSort(int[] data, int[] temp, int l, int r) { 5B)&;[
int i, j, k; 39O rY
int mid = (l + r) / 2; 3 orZBT
if (l == r) I]d-WTd
return; w.58=Pr
if ((mid - l) >= THRESHOLD) 'MW%\W;
mergeSort(data, temp, l, mid); M *w{PjU
else PY_8*~Z
insertSort(data, l, mid - l + 1); 4r4 #u'Om
if ((r - mid) > THRESHOLD) T5T%[Gv
mergeSort(data, temp, mid + 1, r); a6vej
else _ab8z]H
insertSort(data, mid + 1, r - mid); !0lk}Uzkh
N4,oO H~
for (i = l; i <= mid; i++) { F<{,W-my `
temp = data; Az y`4
} .g}N@
for (j = 1; j <= r - mid; j++) { BNJ0D
temp[r - j + 1] = data[j + mid]; 8GW+:
} (rhlK} C
int a = temp[l]; o}QP+
int b = temp[r]; hO[_ _j8
for (i = l, j = r, k = l; k <= r; k++) { KE"6I
if (a < b) { Hre&a!U
data[k] = temp[i++]; <o|fH~?X
a = temp; c6 &k?Puy
} else { <vWP_yy
data[k] = temp[j--]; rK'Lvt@w
b = temp[j]; b||usv[or
} J:W+'x`@
} #pPOQv:~
} .*YF{!R`h
)B $Q
/** QWa@?BO2p
* @param data P\K#q%8
* @param l DgcS@N
* @param i %J2Ad
*/ b?OA|JqX
private void insertSort(int[] data, int start, int len) { (${:5W
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ,Tar?&C:
} \&+Y;:6
} }*rSg .
} IrZ\;!NK
} &4evh<z
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堆排序： Vx.c`/
X<IW5*
package org.rut.util.algorithm.support; Mj1f;$
:(ql=+vDb4
import org.rut.util.algorithm.SortUtil; D$4GNeB+#
'z,kxra|n
/** "{~FEx4
* @author treeroot ]cP%d-x}
* @since 2006-2-2 zAM9%W2v_
* @version 1.0 @~s5{4
*/ dakHH@Q
public class HeapSort implements SortUtil.Sort{ ;UgwV/d
V H`_
/* (non-Javadoc) 9;%$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Q e+;BE-H
*/ m%u`#67oK
public void sort(int[] data) { %T>@Ldt
MaxHeap h=new MaxHeap(); &iw,||#
h.init(data); HdtGyh6X0
for(int i=0;i h.remove(); l(rm0_
System.arraycopy(h.queue,1,data,0,data.length); i/-IjgM"-
} p5E okh
!yj1X Ar
private static class MaxHeap{ ij:a+T
@C@9Tw2Y
void init(int[] data){ QyL]-zNg
this.queue=new int[data.length+1]; oy jkk
for(int i=0;i queue[++size]=data; vkJyD/;=
fixUp(size); `:7r5}(^
} W=A0+t%XC
} Tv7W)?3h
K_Y{50#
private int size=0; BMO,eQcB
jt}oq%Bf
private int[] queue; @1'OuX^
VtzZ1/JE
public int get() { &TRKd)wd
return queue[1]; aWimg6q
} |-vyhr0
'fK=;mM
public void remove() { pSC{0Y$g
SortUtil.swap(queue,1,size--); ~rO&Y{aG#
fixDown(1); 9\?&u_ U"
} p*jU)@a0
file://fixdown $]#8D>E&
private void fixDown(int k) { N)cODy([
int j; T_2'=7
while ((j = k << 1) <= size) { 3(J>aQZuI
if (j < size %26amp;%26amp; queue[j] j++; uY)4y0
if (queue[k]>queue[j]) file://不用交换 7Fpa%N/WL
break; 2X' H^t]7
SortUtil.swap(queue,j,k); )MIw/
k = j; "k+ :!D
} fhZwYx&t
} L|APXy]>
private void fixUp(int k) { :CM-I_6
while (k > 1) { 9$v\D3<Z
int j = k >> 1; +&"W:Le:
if (queue[j]>queue[k]) &u|t{C#0
break; j,].88H
SortUtil.swap(queue,j,k); %LC)sSq{H
k = j; [wSoZBl
} An(gHi;1$
} v,ecNuy*d
PT,*KYF_O"
} 0P$19TN
8bMw.u=F
} JfJ ln[
+1qvT_
SortUtil： 'p[6K'Uq5
l]DRJ
package org.rut.util.algorithm; *vBhd2HO
o|n;{zT"
import org.rut.util.algorithm.support.BubbleSort; J%ws-A?6rN
import org.rut.util.algorithm.support.HeapSort; Hh](n<Bs
import org.rut.util.algorithm.support.ImprovedMergeSort; C`Vuw|Xl
import org.rut.util.algorithm.support.ImprovedQuickSort; 1G`5FU
import org.rut.util.algorithm.support.InsertSort; o+OX^F0
import org.rut.util.algorithm.support.MergeSort; *tZ3?X[b
import org.rut.util.algorithm.support.QuickSort; |U1u:=[
import org.rut.util.algorithm.support.SelectionSort; 5C*Zb3VG4
import org.rut.util.algorithm.support.ShellSort; GPAC0K^p
V^qBbk%l>D
/** :/? Op
* @author treeroot J.2BBy
* @since 2006-2-2 Yy[=E\z
* @version 1.0 oIE(`l0l
*/ y'f-4E<
public class SortUtil { "AJ>pU3
public final static int INSERT = 1; `$ bQ8$+Ci
public final static int BUBBLE = 2; 8_>:0(y
public final static int SELECTION = 3; u(r T2
public final static int SHELL = 4; "OUY^ cM
public final static int QUICK = 5; X+emJ&Z$@
public final static int IMPROVED_QUICK = 6; UBM8l
public final static int MERGE = 7; .O~rAu*K
public final static int IMPROVED_MERGE = 8; b,HXD~=
public final static int HEAP = 9; ,t1s#*j\!q
3S^Qo9S
public static void sort(int[] data) { YA8/TFu<_
sort(data, IMPROVED_QUICK); Tz&cm=
} m|cRj{xZF
private static String[] name={ jvd3_L-@E<
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 0~<t :q!
}; VasQ/
cv_O2Q4,@
private static Sort[] impl=new Sort[]{ cP/(h
new InsertSort(), ioTqT:.
new BubbleSort(), <0`"vPU
new SelectionSort(), QQHC 1
new ShellSort(), 6*ZZ)W<
new QuickSort(), t@cBuV`9c
new ImprovedQuickSort(), :i?c
new MergeSort(), Qw%0<~<
new ImprovedMergeSort(), Z#%77!3
new HeapSort() 3_VWtGQ
}; qj*BV
/e*<-a
public static String toString(int algorithm){ z9#jXC#OdN
return name[algorithm-1]; f}FJR6VO
} EjVB\6,
y;9K
public static void sort(int[] data, int algorithm) { NVC$8imip
impl[algorithm-1].sort(data); =g@hh)3wP
} @izS_I,
";0-9*I
public static interface Sort { H<b4B$/
public void sort(int[] data); 4f0dc\$
} GEb)nHQq
|("5 :m
public static void swap(int[] data, int i, int j) { yNx"Ey dk`
int temp = data; XnvaT(k7Y
data = data[j]; 8{Svax(
data[j] = temp; xi\uLu?i
} hi]\M)l&x
} 6B?1d /8V