[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; +RD{<~i
} /909ED+)>9
int i1=l; 74%Uojl"
int i2=mid+1; G~Fjla\?Q
for(int cur=l;cur<=r;cur++){ @X#e
if(i1==mid+1) OlYCw.Zu
data[cur]=temp[i2++]; z%L\EP;o}
else if(i2>r) X!0m,
data[cur]=temp[i1++]; {hKf 'd9E
else if(temp[i1] data[cur]=temp[i1++]; ldWr-
else .^uYr^(|[
data[cur]=temp[i2++]; 4m/L5W:K
} X1lL@`r.5
} K]Q1VfeL=
&?yVLft
} x^6sjfAW
o!|TCwt
改进后的归并排序: ,"4
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package org.rut.util.algorithm.support; iYzm<3n?
^2!l/(?
import org.rut.util.algorithm.SortUtil; :8Jn?E (36
>*[Bq;
/** 0D48L5kH#'
* @author treeroot 4[m4u6z=
* @since 2006-2-2 %!Ak]|[7
* @version 1.0 P 4jg]g
*/ uVV;"LVK~
public class ImprovedMergeSort implements SortUtil.Sort { ]_P!+5]<
8w4cqr4m
private static final int THRESHOLD = 10; WiclG8l
8{J{)gF
/* ai(J%"D"
* (non-Javadoc) a`uHkRX )U
* {t<U:*n2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `$N AK
*/ +;wu_CQu
public void sort(int[] data) { /YH5s=
int[] temp=new int[data.length]; ih/MW_t=m=
mergeSort(data,temp,0,data.length-1); HESORa;
} j`kw2(
BF>3CW7
private void mergeSort(int[] data, int[] temp, int l, int r) { 3~^}R
int i, j, k; M `bEnu
int mid = (l + r) / 2; vFGFFA/K}N
if (l == r) (E(kw="
return; dD0:K3@
if ((mid - l) >= THRESHOLD) ~T<o?98
mergeSort(data, temp, l, mid); y%x2
else ^3 '7
insertSort(data, l, mid - l + 1); 4zM$I
if ((r - mid) > THRESHOLD) ?Wm.'S'to
mergeSort(data, temp, mid + 1, r); ?-IjaDC}
else 'X(G><R9
insertSort(data, mid + 1, r - mid); geRD2`3;
OTe0[p6v
for (i = l; i <= mid; i++) { Y!|*`FII
temp = data; @I^LmB9*
} <kr%ylhIu
for (j = 1; j <= r - mid; j++) { rwUKg[ 1N
temp[r - j + 1] = data[j + mid]; 2,O;<9au<
} Lg[_9`\
int a = temp[l]; h tn?iLq
int b = temp[r]; ]OKs65
for (i = l, j = r, k = l; k <= r; k++) { vo_m$/O
if (a < b) { PI0[
data[k] = temp[i++]; +TnRuehtk
a = temp; GY%48}7
} else { G&/RJLX|w
data[k] = temp[j--]; l|P(S(ikh
b = temp[j]; vg5;F[e
} P}+-))J
} *@2?_b}A ^
} m# ]VdO'f
`:XrpD
/** sA u ;i
* @param data 8s_'tw/{
* @param l ovn)lIs
* @param i ^gpswhp 5
*/ *MFsq}\ $
private void insertSort(int[] data, int start, int len) { hDJ84$eVZ
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); E%vG#
} <|'C|J_!
} cR+9^DzA
} b^Xq(q>5
} CYZx/r<
?=;dNS@i@
堆排序： OJL?[<I
/M;A)z
package org.rut.util.algorithm.support; MR@*09zP(?
OBCRZ
import org.rut.util.algorithm.SortUtil; p Rn vd|
wtDy-H n
/** ` qqUuFMM
* @author treeroot %usy`4 2
* @since 2006-2-2 a0oM KGW:
* @version 1.0 'K=n}}&:
*/ \)?[1b&[_
public class HeapSort implements SortUtil.Sort{ TrHz(no
H *gF>1
/* (non-Javadoc) G#&R/Tc5N
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) G:e9}
*/ %hzl3>().
public void sort(int[] data) { gZ*8F|sg
MaxHeap h=new MaxHeap(); Jm|eZDp
h.init(data); Ub8|x]ix
for(int i=0;i h.remove(); DV(^h$1_
System.arraycopy(h.queue,1,data,0,data.length); Gmi w(T
} -$#'
9:!<=rk
private static class MaxHeap{ P7;=rSW
m 4VhR_
void init(int[] data){ (q!tI*}
this.queue=new int[data.length+1]; |7V:~MTkk&
for(int i=0;i queue[++size]=data; Xx~XW^lsh
fixUp(size); NX^%a1D!
} TM8WaH
} t7#C&B
8lo /BGxS>
private int size=0; zice0({iJ
fD#VI
private int[] queue; piE9qXn
I|?zSFa
public int get() { X#$mBRK7
return queue[1]; ,nJYYM
} !biq7f%6#
<j93
public void remove() { iD)R*vnAi
SortUtil.swap(queue,1,size--); ^@'LF T)
fixDown(1); e'I13)
} jjgjeY
file://fixdown +j._NRXRH
private void fixDown(int k) { ?3wEO>u
int j; URq{#,~CT
while ((j = k << 1) <= size) { HY.?? 5MH
if (j < size %26amp;%26amp; queue[j] j++; F^Yt\V~T
if (queue[k]>queue[j]) file://不用交换 15i8) 4h
break; `Trpv$
SortUtil.swap(queue,j,k); 7tgn"wK
k = j; cNzn2-qv
} R&13P&:g
} v*+.;60_
private void fixUp(int k) { _e<3 g9bj
while (k > 1) { 5gV%jQgkC
int j = k >> 1; |0vV?f$
if (queue[j]>queue[k]) UwuDs2 t
break; MXWCYi
SortUtil.swap(queue,j,k); ;Jex#+H(:D
k = j; V&x6ru#
} 2 w2JFdm
} Dz4fP;n
~l~ai>/
} L3^WI( 8m
DW^E46k)A
} SrPZ^NF
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SortUtil： 0#~e KFy
H]5%"(h
package org.rut.util.algorithm; >}`q4U6$
9S ~!!7oj
import org.rut.util.algorithm.support.BubbleSort; 1=x4m=wV
import org.rut.util.algorithm.support.HeapSort; iq>PN:mr
import org.rut.util.algorithm.support.ImprovedMergeSort; ?:(BkY,K5
import org.rut.util.algorithm.support.ImprovedQuickSort; PSX-b)wb
import org.rut.util.algorithm.support.InsertSort; w:l/B '%]Y
import org.rut.util.algorithm.support.MergeSort; &BnK[Q8X
import org.rut.util.algorithm.support.QuickSort; F.)b`:g
import org.rut.util.algorithm.support.SelectionSort; 6$qn'K$
import org.rut.util.algorithm.support.ShellSort; SqL8MKN)
9K*yds
/** okx~F9
* @author treeroot &CCp@" +
* @since 2006-2-2 (B@:0}>
* @version 1.0 H tIl;E
*/ Fv \yhR
public class SortUtil { w)o^?9T
public final static int INSERT = 1; d(RSn|[0
public final static int BUBBLE = 2; irSdqa/
public final static int SELECTION = 3; 7@R;lOzL3
public final static int SHELL = 4; !BD+H/A.{
public final static int QUICK = 5; sfSM7f
public final static int IMPROVED_QUICK = 6; tSK{Abw1B
public final static int MERGE = 7; .!T]sX_P
public final static int IMPROVED_MERGE = 8; R9X*R3nB
public final static int HEAP = 9; ,&S:(b[D
&D,gKT~
public static void sort(int[] data) { (,~gY=E+
sort(data, IMPROVED_QUICK); LFHV~>d
} ek~bXy{O`
private static String[] name={ lYkm1
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ;W6P$@'zs
}; ?[>+'6
wykk</eQ.i
private static Sort[] impl=new Sort[]{ -=aI!7*"$
new InsertSort(), V_JM@VN}Kk
new BubbleSort(), t0XM#9L
new SelectionSort(), Xk[;MZ[
new ShellSort(), \M>}-j`v
new QuickSort(), 3-4' x2
new ImprovedQuickSort(), o:u *E
new MergeSort(), :Hdn&a i
new ImprovedMergeSort(), 2x-67_BHY=
new HeapSort() Wu]Dpe
}; b&s"/Y89
Vt-D8J\A 0
public static String toString(int algorithm){ Sns`/4S?6Z
return name[algorithm-1]; W)^0~[`i
} Gj]*_"T
z-*/jFE
public static void sort(int[] data, int algorithm) { .Cfi/
impl[algorithm-1].sort(data); n:cre}0.
} SXn\k;F<
.b*%c?e
public static interface Sort { a=*&OW
public void sort(int[] data); #% PnZ /
} V=}AFGC85
cx?t C#t
public static void swap(int[] data, int i, int j) { J%c4-'l
int temp = data; '1]Iu@?
data = data[j]; JiL%1y9|
data[j] = temp; e1ru#'z
} U5 ~L^
} W|_^Oe<