[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; EDvK9J
} &$ F0
int i1=l; qie7iE`o
int i2=mid+1; YE&"IH]lF
for(int cur=l;cur<=r;cur++){ 8 f%@:}H
if(i1==mid+1) ` 1DJwe2
data[cur]=temp[i2++]; 2;%DE<Z
else if(i2>r) VE^NSkOa&
data[cur]=temp[i1++]; _:0<]<x?
else if(temp[i1] data[cur]=temp[i1++]; }5bh,'
else hC<X\yxe
data[cur]=temp[i2++]; 'P}"ZHW
} +V1EqC*
} 8YraW|H
m_~ p G
} qAm$yfYs`
l?(nkg["nY
改进后的归并排序: W5(t+$L.
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package org.rut.util.algorithm.support; X`]-)(UX
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import org.rut.util.algorithm.SortUtil; *wP8)yv7
oT&JQ,i[2Q
/** Y32F{ z
* @author treeroot ]>/YU*\
* @since 2006-2-2 !`\W8JT+
* @version 1.0 Dqe)8 r
*/ ?LgR8/Io@5
public class ImprovedMergeSort implements SortUtil.Sort { l9)iLOj
Gk,{{:M:5
private static final int THRESHOLD = 10; MLY19;e
>1a-}>r
/* Vj4 if@Z
* (non-Javadoc) $/],QD_;"
* !798%T
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) p+;Re2Uyg
*/ L@S"c (
public void sort(int[] data) { +%X_+9bd
int[] temp=new int[data.length]; 93x.b]]"
mergeSort(data,temp,0,data.length-1); [{N i94:d
} qLKyr@\'
<qZXpQ#
private void mergeSort(int[] data, int[] temp, int l, int r) { ,oIZ5u{#,
int i, j, k; _baqN!N
int mid = (l + r) / 2; 'LFHZ&-
if (l == r) %9[GP7?
return; 0{v?
if ((mid - l) >= THRESHOLD) {b^naE
mergeSort(data, temp, l, mid); [ar:zlV8
else 4DEsB)%X
insertSort(data, l, mid - l + 1); dJ?VN!B0
if ((r - mid) > THRESHOLD) Y+iC/pd
mergeSort(data, temp, mid + 1, r); G#5Cyu<r!
else @iUzRsl
insertSort(data, mid + 1, r - mid); /OgXNIl]
r4JXbh6Tt
for (i = l; i <= mid; i++) { ixBM>mRK
temp = data; <Nvw w
} -6~*:zg,
for (j = 1; j <= r - mid; j++) { _XXK1H x
temp[r - j + 1] = data[j + mid]; dVVeH\o
} b-]E-$Uz
int a = temp[l]; oHI~-{m3)
int b = temp[r]; XZcsx
for (i = l, j = r, k = l; k <= r; k++) { uA C:&
if (a < b) { #1hT#YN
data[k] = temp[i++]; ,9|%
a = temp; :m5& i&
} else { )oTEB#J
data[k] = temp[j--]; Qat%<;P2
b = temp[j]; FvG9PPd
} }yx{13:[
} z:u`W#Rf
} <Ml,H%F
T_Z@uZom.
/** _I~TpH^1K
* @param data ;07!^#:L=Q
* @param l L)8+/+
* @param i a[";K,
*/ huvg'Yt
private void insertSort(int[] data, int start, int len) { -/x +M-X#
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); H4l:L(!D
} H!F'I)1
} )FWF T:P~
} dadOjl)S)
} aU^>kRGc
/T#<g:
堆排序： [w=x0J&
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package org.rut.util.algorithm.support; 6$ IXER
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import org.rut.util.algorithm.SortUtil; [7<X&Q
zmr=iK
/** ^+`vh0TPQ
* @author treeroot t)cG_+rJ
* @since 2006-2-2 ,Lv}Xku
* @version 1.0 c::x.B"w
*/ Lom%eoH)
public class HeapSort implements SortUtil.Sort{ 32~Tf,
e"r}I!.
/* (non-Javadoc) eoEb\zJ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ujz %0Mq;
*/ !Q.c8GRUQ
public void sort(int[] data) { V.y+u7<3}
MaxHeap h=new MaxHeap(); ^{6Y7T]
h.init(data); FT|*~_@
for(int i=0;i h.remove(); iM8hGQ`
System.arraycopy(h.queue,1,data,0,data.length); zNE!m:s
} /4_}wi\
*N>Qj-KAM_
private static class MaxHeap{ =7e8N&-nv
^]U2Jd
void init(int[] data){ !-N!80
this.queue=new int[data.length+1]; "3\RJ?eW:S
for(int i=0;i queue[++size]=data; 30DpIkf
fixUp(size); P?9CBhN
} EHzZ9zH\
} '/sc `(`:0
P*aD2("Z
private int size=0; EAY9~b6~c
jb7=1OPD_
private int[] queue; YvYavd
//J:p,AF
public int get() { ]G1j\wnF
return queue[1]; `4k;`a
} s{s0#g
U">OdoZ,E+
public void remove() { dtF6IdAf
SortUtil.swap(queue,1,size--); +ixDB0"\
fixDown(1); dH`a|SVW9
} >,] #~d
file://fixdown dtg Ja_
private void fixDown(int k) { PU'v o4
int j; OW-+23)sj
while ((j = k << 1) <= size) { F)gL=6h
if (j < size %26amp;%26amp; queue[j] j++; Qb(CH
if (queue[k]>queue[j]) file://不用交换 Rw/G =zV@2
break; Y\op9Fw
SortUtil.swap(queue,j,k); E_H1X'|qS4
k = j; qL'3MY.!
} W2<X 5'
} ?-i|f_`
private void fixUp(int k) { c<H4rB
while (k > 1) { 3zl!x
int j = k >> 1; _p_F v>>:
if (queue[j]>queue[k]) 3/[=
break; #e|eWi>
SortUtil.swap(queue,j,k); iEU(1?m2-
k = j; Etl7V
} >^Y9p~
} PN'8"8`{
JQtH},Tr
} <!+o8z]
,88Y1|:X
} -"cN9RF
xS(sRx+A
SortUtil： TWs|lhC7!
yq<YGNy!
package org.rut.util.algorithm; QqwXFk
!3b%Q</M H
import org.rut.util.algorithm.support.BubbleSort; Wt`D
import org.rut.util.algorithm.support.HeapSort; 3%P?1s
import org.rut.util.algorithm.support.ImprovedMergeSort; ScTqnY$v
import org.rut.util.algorithm.support.ImprovedQuickSort; 'sA&Pm
import org.rut.util.algorithm.support.InsertSort; djSN{>S
import org.rut.util.algorithm.support.MergeSort; Olno9_'
import org.rut.util.algorithm.support.QuickSort; "~[Rwh?
import org.rut.util.algorithm.support.SelectionSort; - a=yid
import org.rut.util.algorithm.support.ShellSort; t]` 2f3UO
q@\_q!
/** sbs"26IE
* @author treeroot xv*mK1e
* @since 2006-2-2 gRFC n6Q
* @version 1.0 ex|kD*=
*/ gSGe]
public class SortUtil { T+[e6/|
public final static int INSERT = 1; =CVw0'yZ
public final static int BUBBLE = 2; eyE&<:F#J
public final static int SELECTION = 3; uVk8KMYU
public final static int SHELL = 4; \ bhok
public final static int QUICK = 5; QB.7n&u
public final static int IMPROVED_QUICK = 6; ~FsUK;?
public final static int MERGE = 7; kN^)6
public final static int IMPROVED_MERGE = 8; B.WJ6.DkS
public final static int HEAP = 9; y H'\<bT
ryT8*}o
public static void sort(int[] data) { n (|>7
sort(data, IMPROVED_QUICK); q-RGplx
} x'KsQlI/
private static String[] name={ OP&[5X+Y
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" D!P?sq_5r
}; XMdc n,
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private static Sort[] impl=new Sort[]{ MvW>ktkU
new InsertSort(), 5^Y/RS i
new BubbleSort(), j~8+,:
new SelectionSort(), Qnw$=L:
new ShellSort(), ~3%3{aa
new QuickSort(), U\ L"\N7
new ImprovedQuickSort(), HUghl2L.<
new MergeSort(), l<HRD
new ImprovedMergeSort(), %b?Pasf.
new HeapSort() &-*nr/xT
}; Z`*cI
$"i690
public static String toString(int algorithm){ vqs~a7E-P
return name[algorithm-1]; ,,J3 h
} C1/jA>XW
O<3,n;56Z
public static void sort(int[] data, int algorithm) { wY95|QS
impl[algorithm-1].sort(data); d"78:+
} 47RYpd
q>[% C5
public static interface Sort { :9#`|#uh
public void sort(int[] data); {eXYl[7n
} J v#^GNm
Lm?*p>\Q
public static void swap(int[] data, int i, int j) { G4}q*&:k
int temp = data; Q*8-d9C
data = data[j]; hG@ys5
data[j] = temp; `[KhG)Y7t
} TH|hrL;:8
} QdTe!f|