[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; 306C_M\$
} |*"uj
int i1=l; u1O?`
int i2=mid+1; vRYQ4B4o
for(int cur=l;cur<=r;cur++){ -J4?Km
if(i1==mid+1) ^EE3E'
data[cur]=temp[i2++]; WK]SHiHD
else if(i2>r) >I AwNr
data[cur]=temp[i1++]; #q40 >)]
else if(temp[i1] data[cur]=temp[i1++]; ?"\`u;
else PhF3' ">
data[cur]=temp[i2++]; ?J,hv'L]
} &yv%"BPV
} =YkJS%)M)
d paZ6g
} 2`/JT
rIp84}
改进后的归并排序: ET1/oG<@
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package org.rut.util.algorithm.support; 8SK}#44Xz
0\O*\w?
import org.rut.util.algorithm.SortUtil; lq=|=
fD#|C~:=
/** o0^'xVv
* @author treeroot a(s}Ec${Z
* @since 2006-2-2 x F7C1g(
* @version 1.0 {4Cn/}7Ly^
*/ )e|Cd} 2
public class ImprovedMergeSort implements SortUtil.Sort { :<4:h.gO8
FW(y#Fmqs
private static final int THRESHOLD = 10; :Eq=wbAw
S#dkJu]]#
/* 2628 c`
* (non-Javadoc) Fyoy)y*
* Urur/_]-%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) X64OX9:YF
*/ ]0.? 1se
public void sort(int[] data) { X*VHi
int[] temp=new int[data.length]; R:kNAtK
mergeSort(data,temp,0,data.length-1); \ Xow#@[
} E6|!G
'm9f:iTr
private void mergeSort(int[] data, int[] temp, int l, int r) { LGZ5py=xb
int i, j, k; 6b4Kcl<i
int mid = (l + r) / 2; (nfra,'
if (l == r) \9dSI
return; u}hQF$a"
if ((mid - l) >= THRESHOLD) }2-<}m9}
mergeSort(data, temp, l, mid); O= PFr"
else #+p30?r0y
insertSort(data, l, mid - l + 1); Lzu;"#pw
if ((r - mid) > THRESHOLD) I^sWf3'db
mergeSort(data, temp, mid + 1, r); YG$2ySkDhE
else Z W` Ur>
insertSort(data, mid + 1, r - mid); VQV7W
EL$"MT}p
for (i = l; i <= mid; i++) { saQA:W;
temp = data; p"f=[awp
} q3Re F_
for (j = 1; j <= r - mid; j++) { p*)RP2
temp[r - j + 1] = data[j + mid]; N r5 aU6]
} eYBo*
int a = temp[l]; rXXIpQRi$S
int b = temp[r]; [,)yc/{*
for (i = l, j = r, k = l; k <= r; k++) { De,4r(5
if (a < b) { @=q,,t$r
data[k] = temp[i++]; e|u|b
a = temp; b}4k-hZL
} else { t_5b
data[k] = temp[j--]; cy8+@77
b = temp[j]; ysD@yM,
} NKB,D$!~&
} "ut:\%39.
} 68?oV)fE
h"/FqO
/** 4&;.>{:;
* @param data B8-v!4b0`
* @param l GCCmUR9d
* @param i w_|R.T\7
*/ hM\<1D CKG
private void insertSort(int[] data, int start, int len) { CLU!/J$!
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 'jWd7w~(
} c0jdZ#H
} [b-27\b
} n~N>c*p
} e_s9E{(
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堆排序： TtEc~m
, "w`,c>!
package org.rut.util.algorithm.support; r(NfVQF
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import org.rut.util.algorithm.SortUtil; '0x`Oh&PK
D7cOEL<
/** z!27#gbL
* @author treeroot Gs%IZo_
* @since 2006-2-2 1><\3+8
* @version 1.0 j(/Bf m
*/ G%~=hEK0
public class HeapSort implements SortUtil.Sort{ .kh%66:
Dgh|,LqUB
/* (non-Javadoc) S@]7
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~8~B VwZ_
*/ bHE'R!*
public void sort(int[] data) { rhY>aj
MaxHeap h=new MaxHeap(); .b>1u3
h.init(data); R)?b\VK2$
for(int i=0;i h.remove(); <cG .V|B
System.arraycopy(h.queue,1,data,0,data.length); "GoNTM5h
} ,!_
2h0I1a,7
private static class MaxHeap{ 49n.Gc
Kd^{~Wlz&z
void init(int[] data){ ,\Gn
this.queue=new int[data.length+1]; yZ3/Ia>,
for(int i=0;i queue[++size]=data; k^AI7H
fixUp(size); RP'`\||*
} f%9EZ+OP
} -e7|DXj
7onMKMktM%
private int size=0; s>z$_
Jhu<^pjs
private int[] queue; 6dTq&GZ\
{H s""/sb
public int get() { _.0c~\VA
return queue[1]; Y W_E,A>h
} |sz`w^#
eCdx(4(\a
public void remove() { Zzr+p.
SortUtil.swap(queue,1,size--); +aRjJ/*
fixDown(1); EB jiSQw
} !J!zi
file://fixdown p3O%|)yV
private void fixDown(int k) { }/BwFB+(/
int j; ?TLEZlB2"
while ((j = k << 1) <= size) { 0(#HMBE8
if (j < size %26amp;%26amp; queue[j] j++; LB%_FT5
if (queue[k]>queue[j]) file://不用交换 KY/}jJW
break; w~M5)b
SortUtil.swap(queue,j,k); KTxdZt
k = j; 5} |O
} , M$*c
} SPW @TF1
private void fixUp(int k) { d_#\^!9
while (k > 1) { 2#&9qGR
int j = k >> 1; hABC rd Em
if (queue[j]>queue[k]) P$_Y:XI !
break; >U~.I2sz
SortUtil.swap(queue,j,k); "{;]T
k = j; AWCzu5ve
} :/ns/~5xa:
} Ne*I$T 5
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} bT-(lIU
%Bmi3 =Rr
} :xZ/c\
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SortUtil： 'dM &~LSQ
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package org.rut.util.algorithm; D.)$\Caq
k6rX/ocu
import org.rut.util.algorithm.support.BubbleSort; *JGm
import org.rut.util.algorithm.support.HeapSort; #{7=
import org.rut.util.algorithm.support.ImprovedMergeSort; vIG8m@-!&;
import org.rut.util.algorithm.support.ImprovedQuickSort; l)D18
import org.rut.util.algorithm.support.InsertSort; [,Ts;Hy6Q
import org.rut.util.algorithm.support.MergeSort; <'op
import org.rut.util.algorithm.support.QuickSort; ;&e5.K+.Z
import org.rut.util.algorithm.support.SelectionSort; VuFMjY
import org.rut.util.algorithm.support.ShellSort; Vi`+2%4
gwQL9 UYx
/** lJoMJS;S]}
* @author treeroot &J^@TgqL^
* @since 2006-2-2 ^ef:cS$;
* @version 1.0 K @"m0
*/ |tz1'YOB
public class SortUtil { cRz7.9-<
public final static int INSERT = 1; 5R4h9D5
public final static int BUBBLE = 2; x(3E#7>1
public final static int SELECTION = 3; /MTS>[E
public final static int SHELL = 4; i\2MphS
public final static int QUICK = 5; U jVo "K
public final static int IMPROVED_QUICK = 6; l3n* b6
public final static int MERGE = 7; l0Jpf9Aue
public final static int IMPROVED_MERGE = 8; NFY,$
public final static int HEAP = 9; KXcG;b[7n
K]zBPfx
public static void sort(int[] data) { FB@c +*1
sort(data, IMPROVED_QUICK); gqNd@tYI
} V'pNo&O=
private static String[] name={ iKV;>gF,)v
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" E5 H6&XU
}; jD0^,aiG
U/,`xA;v>
private static Sort[] impl=new Sort[]{ $y\'j5nk3
new InsertSort(), Q`g0g)3w
new BubbleSort(), m\U@L+L
new SelectionSort(), ?nrd$,
new ShellSort(), ^C>i(j&
new QuickSort(), Lcplc"C
new ImprovedQuickSort(), ?v#t{e0eQ
new MergeSort(), MR%M[SK1
new ImprovedMergeSort(), Rb<aCX
new HeapSort() 3s\2 9gq
}; hnL"f[p@gC
LYGFEjS[
public static String toString(int algorithm){ V!c{%zd
return name[algorithm-1]; {"y{V
} QV+('
G9z Q{E
public static void sort(int[] data, int algorithm) { \%&QIe;:k
impl[algorithm-1].sort(data); B9iH+ ]W
} 4u X<sJ*
|^Try2@
public static interface Sort { C5i]n? )S
public void sort(int[] data); Slq=;TDp
} //Ioh (N
=NAL*4c+
public static void swap(int[] data, int i, int j) { O-wR48Q
int temp = data; ?YXl.yj
data = data[j]; Sl^HMO
data[j] = temp; ?F*gFW_k
} ^o!K0t*
} f|?i6.N>f