[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; Qz T>h
} $Hx00 ho
int i1=l; Q?f%]uGFQ
int i2=mid+1; }(g`l)OX
for(int cur=l;cur<=r;cur++){ }Yi)r*LI3
if(i1==mid+1) dmq<vVxC
data[cur]=temp[i2++]; tSST.o3
else if(i2>r) C~do*rnM^
data[cur]=temp[i1++]; G}o?lo\#h
else if(temp[i1] data[cur]=temp[i1++]; L<kIzB !
else Cm~h\+"
data[cur]=temp[i2++]; \9U4V>p
} b#**`Y
} =h?Q.vad
.Z,3:3,]
} 5yvaY "B
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改进后的归并排序: $jt UQ1
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package org.rut.util.algorithm.support; k,EI+lCX
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import org.rut.util.algorithm.SortUtil; p*11aaIbp~
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/** l!n<.tQW
* @author treeroot 81\$X
* @since 2006-2-2 J{GtH[
* @version 1.0 L{v^:
*/ w#?@ulr]d
public class ImprovedMergeSort implements SortUtil.Sort { 8q)wT0A~
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private static final int THRESHOLD = 10; $ae*3L>5M
9n$0OH /q
/* A),nkw0X
* (non-Javadoc) so* lV
* Mo+mO&B
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) NDG3mCl
*/ tMN^"sjf*
public void sort(int[] data) { 5e!YYt>
int[] temp=new int[data.length]; o8 A]vaa
mergeSort(data,temp,0,data.length-1); / 38b:,
} mhp&; Q9
aR }|^ex
private void mergeSort(int[] data, int[] temp, int l, int r) { 2gn*B$a
int i, j, k; ryz [A:^G
int mid = (l + r) / 2; #z|\AmZ\
if (l == r) G;:D6\
return; ^y@RfM=A
if ((mid - l) >= THRESHOLD) ~<M/<%o2*
mergeSort(data, temp, l, mid); ]!>ThBMa
else ~|j:xM(i
insertSort(data, l, mid - l + 1); 9NH"Ik*
if ((r - mid) > THRESHOLD) 6E9y[ %+
mergeSort(data, temp, mid + 1, r); )P6n,\
else >".,=u'
insertSort(data, mid + 1, r - mid); ]J^9iDTTA
.s4hFB^n
for (i = l; i <= mid; i++) { U] 2fV|Hn
temp = data; Jjb(lW
} 9aLS%-x!+
for (j = 1; j <= r - mid; j++) { &G5=?ub
temp[r - j + 1] = data[j + mid]; Evz;eobW/
} JHY0J &4s
int a = temp[l]; a:C'N4K
int b = temp[r]; >*xa\ve
for (i = l, j = r, k = l; k <= r; k++) { }*!7 Vrep
if (a < b) { Tct[0B
data[k] = temp[i++]; b8V]/
a = temp; >Z#=<
} else { ` [ EzU+
data[k] = temp[j--]; 9N9dQ}[:g
b = temp[j]; ]w _,0q
} s52c`+
} stnyJ9
} lO/<xSjNd
By=/DVm)=
/** qyP|`Pm4
* @param data zy(i]6
* @param l 2 }QD>
* @param i 0y$aGAUm
*/ sPCp20x:y8
private void insertSort(int[] data, int start, int len) { 9`J!]WQ1[
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); \Vis
} BX[92~Bq
} _VU/j9<+
} ,}M@Am0~
} ETP}mo
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堆排序： "7R"(.~>
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package org.rut.util.algorithm.support; 1y5]+GU'`
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import org.rut.util.algorithm.SortUtil; <BIj a
Vp $]
/** *|n::9
* @author treeroot { 7y.0_Y
* @since 2006-2-2 P5;LM9W
* @version 1.0 t<O5_}R%d
*/ w=I' CMRt
public class HeapSort implements SortUtil.Sort{ ;!4Bw"Gg
p*10u@,
/* (non-Javadoc) qC9$xIWq
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^/K\a ,
*/ Xtqjx@ye
public void sort(int[] data) { T ,, Ao36
MaxHeap h=new MaxHeap(); DPvM|n`TW
h.init(data); Bcx-t)[
for(int i=0;i h.remove(); n{F$,a
System.arraycopy(h.queue,1,data,0,data.length); D_GIj$%N[
} yD iL
q<>
private static class MaxHeap{ W G2 E3y
0N3 cC4!
void init(int[] data){ SWr?>dl
this.queue=new int[data.length+1]; DpIv <m]
for(int i=0;i queue[++size]=data; OL]^4m
fixUp(size); 4[za|t
} ;dl>
} r}OK3J
3Oy-\09
private int size=0; 8tWOVLquJ
yp=Hxf
private int[] queue; LTu cs}
03*` T
public int get() { >_QC_UX>4i
return queue[1]; qu[ ~#
} Gx?p,Fj
q/xMM`{
public void remove() { D%v4B`4ua'
SortUtil.swap(queue,1,size--); !dB {E
fixDown(1); :8}QKp
} !RLg[_'
file://fixdown 6#XB'PR2p
private void fixDown(int k) { ODK$G [-
int j; &?^S`V8R*
while ((j = k << 1) <= size) { E 3b`GRay
if (j < size %26amp;%26amp; queue[j] j++; Y)Y`9u<?
if (queue[k]>queue[j]) file://不用交换 !oeu
break; <Vyv)#32o3
SortUtil.swap(queue,j,k); orn9;|8q
k = j; oxE'u<
} ;crQ7}k
} $x5P5^Y
private void fixUp(int k) { n(.y_NEgV!
while (k > 1) { E"5 zT1d
int j = k >> 1; d3h2$EDD
if (queue[j]>queue[k]) U'S}7gya
break; e&f9/rfx
SortUtil.swap(queue,j,k); gB@Xi*
k = j; "bAkS}(hB(
} 43pQFDWa
} mxtLcG4G
&P&LjHFK
} V6"<lK8"
jC1mui|Y^
} h+Km|
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SortUtil： cZKK\hf<
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package org.rut.util.algorithm; W R@=[G#TJ
Q[^IX
import org.rut.util.algorithm.support.BubbleSort; zCKZv|j6
import org.rut.util.algorithm.support.HeapSort; {J q[N}
import org.rut.util.algorithm.support.ImprovedMergeSort; T;jp2 #
import org.rut.util.algorithm.support.ImprovedQuickSort; pv&:N,p
import org.rut.util.algorithm.support.InsertSort; 6\ /x
import org.rut.util.algorithm.support.MergeSort; @cdd~9w
import org.rut.util.algorithm.support.QuickSort; yiGq?WA7
import org.rut.util.algorithm.support.SelectionSort; naCPSsei
import org.rut.util.algorithm.support.ShellSort; ^,')1r,
24"Trg\WK[
/** tLe!_p)
* @author treeroot Q=J"#EFs
* @since 2006-2-2 !7!xJ&/V
* @version 1.0 8;;!2>N
*/ v!?bEM3D
public class SortUtil { H];|<G
public final static int INSERT = 1; R*IO%9O
public final static int BUBBLE = 2; A_1cM#4
public final static int SELECTION = 3; d_=@1JM>
public final static int SHELL = 4; ?-0k3
public final static int QUICK = 5; %)T>Wn%b]v
public final static int IMPROVED_QUICK = 6; ;4tVFqR
public final static int MERGE = 7; +[*VU2f t
public final static int IMPROVED_MERGE = 8; %o9@[o .]
public final static int HEAP = 9; `E>HpRcxD
aO('X3?
public static void sort(int[] data) { ZB GLwe
sort(data, IMPROVED_QUICK); Pcut#8?
} zQ9"i
private static String[] name={ Zpg/T K
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" -_Pd d[M
}; wEENN_w
gO%#'Eb2
private static Sort[] impl=new Sort[]{ A,i.1U"w8
new InsertSort(), e>~g!S}G
new BubbleSort(), b{<qt})
new SelectionSort(), $,q~q^0
new ShellSort(), Htn=h~U`z
new QuickSort(), ?>5[~rMn
new ImprovedQuickSort(), GqumH/;
new MergeSort(), i`/_^Fndyu
new ImprovedMergeSort(), <uUQ-]QOIh
new HeapSort() yjUZ40Dq
}; 90> (`pI=
`rsPIOu
public static String toString(int algorithm){ K[0.4+
return name[algorithm-1]; 5G=<2;
} jZeY^T)f"
tGnBx)J|
public static void sort(int[] data, int algorithm) { N&7= hni
impl[algorithm-1].sort(data); bqp6cg\p
} zvV<0 Z
CI"7* z_
public static interface Sort { )orVI5ti
public void sort(int[] data); lP& 7U
} ,dn9tY3
Vy0s%k
public static void swap(int[] data, int i, int j) { O,R5csMh
int temp = data; GZ0? C2\
data = data[j]; C( 8i0(1
data[j] = temp; bVmHUcR0
} 5vs~8|aRo
} nf&PDv1