[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; Gc2sY 0
} S!Ue+jW
int i1=l; {|?OKCG{
int i2=mid+1; vWY}+#
for(int cur=l;cur<=r;cur++){ BE. v+'c"
if(i1==mid+1) Jcf'Zw"\
data[cur]=temp[i2++]; vRa|lGeW
else if(i2>r) p6m](Jg
data[cur]=temp[i1++]; C{>@b:]p
else if(temp[i1] data[cur]=temp[i1++]; It'hmwu#
else #~?Q?"
data[cur]=temp[i2++]; ]jiM
} jqxeON
} nM:e<`r
Kn3qq
} {N1Ss|6
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改进后的归并排序: fy04/_,q
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package org.rut.util.algorithm.support; e^kccz2f
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import org.rut.util.algorithm.SortUtil; '7G'R
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/** *O-1zIlp
* @author treeroot Awl4*J~
* @since 2006-2-2 *KNj5>6=
* @version 1.0 o`S|
*/ UwOZBF<
public class ImprovedMergeSort implements SortUtil.Sort { )&:4//}a
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private static final int THRESHOLD = 10; vaL+@Kq~&
%7=B?c|
/* ,73kh
* (non-Javadoc) *(6vO{
* wY|&qX,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) W^; wr#
*/ m[ *)sm
public void sort(int[] data) { jL8[;*^G
int[] temp=new int[data.length]; nIdB,
mergeSort(data,temp,0,data.length-1); ixF '-
} +c4]}9f!
#<df!)
private void mergeSort(int[] data, int[] temp, int l, int r) { K6<@DP+/
int i, j, k; E!<w t
int mid = (l + r) / 2; ^FNvVbK|`
if (l == r) 5&a4c"fU
return; M{I8b<hY
if ((mid - l) >= THRESHOLD) ipU,.@~#
mergeSort(data, temp, l, mid); SA_5..
else =au7'i|6
insertSort(data, l, mid - l + 1); QX}O{LQR
if ((r - mid) > THRESHOLD) v0euvs
mergeSort(data, temp, mid + 1, r); x'Pp!
else eh_{-
insertSort(data, mid + 1, r - mid); $YuVM
c{4C4'GD
for (i = l; i <= mid; i++) { D?;8bI%"
temp = data; 2)}ic2]pn
} g]au|$L4
for (j = 1; j <= r - mid; j++) { P 1`X<A
temp[r - j + 1] = data[j + mid]; z5G<h
} <)n8lIK
int a = temp[l]; #\9sCnb
int b = temp[r]; #T<<{ RA
for (i = l, j = r, k = l; k <= r; k++) { S1oRMd)r
if (a < b) { vi?{H*H4c
data[k] = temp[i++]; ~lO^C
a = temp; Z)E[Bv=
} else { 6 ,jp-`
data[k] = temp[j--]; u,AZMjlF
b = temp[j]; oE:9}]N_
} bOR1V\Jr$q
} N&g9z{m7
} VZ"W_U,
} :U'aa
/** eytd@-7uX
* @param data Lc,`
* @param l f9v%k'T[
* @param i ={&}8VA
*/ Zz!0|-\
private void insertSort(int[] data, int start, int len) { *m2{6N_
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 9pAklD4
} r #H(kJu,
} V,t&jgG*
} j8/rd
} I*cB Ha
s5{N+O)~S
堆排序： Fw,'a
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package org.rut.util.algorithm.support; c%p7?3Ry
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import org.rut.util.algorithm.SortUtil; 7_t\wmvYp
+$Q.N{LV
/** ,<iJ#$: Sx
* @author treeroot y\-f{I
* @since 2006-2-2 Hkq""'Mx+w
* @version 1.0 ap|7./yg
*/ Qw>ftle
public class HeapSort implements SortUtil.Sort{ T=lir%q
p.{9OrH(4
/* (non-Javadoc) r&F(VF0 6
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) W 2/`O?
*/ ybWb'+x
public void sort(int[] data) { Vgy}0pCl
MaxHeap h=new MaxHeap(); Fkgnc{NI
h.init(data); xWkCP2$?P
for(int i=0;i h.remove(); >E*j4gg
System.arraycopy(h.queue,1,data,0,data.length); JkT, i_
} T)%34gN
9 Yv;Dom
private static class MaxHeap{ uJ:'<dJ
@C[]o.r
void init(int[] data){ Y1e>P
this.queue=new int[data.length+1]; !uaV6K
for(int i=0;i queue[++size]=data; 6ww4ZH?j
fixUp(size); k.Tu#7
} m1,?rqeb
} 1J$sIY,Ou
aXi5~,Ks_
private int size=0; 7R9S%
?^TjG)e7
private int[] queue; 7WZ).,qxY
d=<"sHO
public int get() { E,"?RbG
return queue[1]; J:s^F n
} )$18a
_`6fGu& W
public void remove() { C.SGm
SortUtil.swap(queue,1,size--); __x2xtrH
fixDown(1); C@!C='b,
} z}I4m
file://fixdown e[txJ*SuO
private void fixDown(int k) { SplEY!.k
int j; gFk~SJd
while ((j = k << 1) <= size) { `-)!4oJ]
if (j < size %26amp;%26amp; queue[j] j++; l=(4o4um
if (queue[k]>queue[j]) file://不用交换 8r7}6
break; u=a5Z4N'
SortUtil.swap(queue,j,k); (Uo:WyVj|F
k = j; fiDwa ;,
} g3B zi6$m
} #vk-zx*v7=
private void fixUp(int k) { .xXe *dm%
while (k > 1) { F$TNYZ
int j = k >> 1; ?m&?BsW$)
if (queue[j]>queue[k]) /S}0u}jID?
break; wps`2`z
SortUtil.swap(queue,j,k); PnB%vS
k = j; QbGc 9MM
} <]f ru1
} SM>V o+
#$h~QBg
} &Nf10%J'<
Tac7+=T
} LKtug>Me
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SortUtil： b"U{@
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package org.rut.util.algorithm; unE h
i:ar{ q
import org.rut.util.algorithm.support.BubbleSort; :W'Yt9v)
import org.rut.util.algorithm.support.HeapSort; XA8{N
import org.rut.util.algorithm.support.ImprovedMergeSort; X+l&MD
import org.rut.util.algorithm.support.ImprovedQuickSort; sGx"ja+
import org.rut.util.algorithm.support.InsertSort; xyGk\= S
import org.rut.util.algorithm.support.MergeSort; 6nxX~k
import org.rut.util.algorithm.support.QuickSort; F,2)Udim
import org.rut.util.algorithm.support.SelectionSort; C'bW3la
import org.rut.util.algorithm.support.ShellSort; YGp8./ma<I
{J`Zl1_q
/** wwnl_9a
* @author treeroot "9=F/o9
* @since 2006-2-2 !Pnvqgp/
* @version 1.0 $[zy|Y(
*/ bzFwQi}>
public class SortUtil { O*MC"%T
public final static int INSERT = 1; }UwDHq=
public final static int BUBBLE = 2; l{U-$}
public final static int SELECTION = 3; 9b`J2_ ]k
public final static int SHELL = 4; U=_O*n?N-d
public final static int QUICK = 5; XA`<*QC<
public final static int IMPROVED_QUICK = 6; .PyPU]w
public final static int MERGE = 7; |Sg FHuA
public final static int IMPROVED_MERGE = 8; xE/r:D#
public final static int HEAP = 9; Nh7D&#z
8v&4eU'S
public static void sort(int[] data) { 1+;Z0$edxz
sort(data, IMPROVED_QUICK); %T:~N<8)
} _c*0Rr
private static String[] name={ $~M#msK9
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" /15e-(Zz/
}; g_z%L?N
n W2[x;
private static Sort[] impl=new Sort[]{ u<`CkYT
new InsertSort(), ?C#=Q6
new BubbleSort(), Q v/}WnBk
new SelectionSort(), [}snKogp
new ShellSort(), kh3PEq
new QuickSort(), _tE`W96J
new ImprovedQuickSort(), #R&Dgt
new MergeSort(), Hm=!;xAFX
new ImprovedMergeSort(), P;R`22\3
new HeapSort() zUg-M
}; -)%l{@Mr
qaK9E@l
public static String toString(int algorithm){ BU|=`Kb|))
return name[algorithm-1]; ?#|Y'%a"
} M7R.?nk
J!sIxwF
public static void sort(int[] data, int algorithm) { -h&AO\*^W
impl[algorithm-1].sort(data); >;Er[Rywr
} mSSDV0Pfn
`TvpKS5.Y
public static interface Sort { Ps3wg=ni[
public void sort(int[] data); AH$D./a
} hS)X`M
>5Vv6_CI0?
public static void swap(int[] data, int i, int j) { H+&c=~D\_
int temp = data; {(r`&[
data = data[j]; w i,}sEoM
data[j] = temp; yyZV/ x~
} $ZSjq
} [[(29|`]