[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; t/$:g9V%FA
} ioW&0?,Ym
int i1=l; [[XbKg`"?
int i2=mid+1; /`kM0=MMa
for(int cur=l;cur<=r;cur++){ }+@GgipyO.
if(i1==mid+1) b}APD))*H!
data[cur]=temp[i2++]; 8el\M/u{
else if(i2>r) Z>l%:;H
data[cur]=temp[i1++]; 5mqwNAv
else if(temp[i1] data[cur]=temp[i1++]; U0m 5Rc
else %|izt/B
data[cur]=temp[i2++]; XM#xxf* Y
} Ht,+KbB
} P->.eo#VG
af-
} -\|S=< g
Y=5}u&\
改进后的归并排序: )`z{T
/^pPT6
package org.rut.util.algorithm.support; .,*68S0k7
#d*)W3e2{
import org.rut.util.algorithm.SortUtil; dd-`/A@
&;2@*#,
/** "i^< H
* @author treeroot BM>'w,$KL
* @since 2006-2-2 $6DA<v^=z
* @version 1.0 (:r80:
*/ kSUpEV+/
public class ImprovedMergeSort implements SortUtil.Sort { /^\UB fE
%] #XIr
private static final int THRESHOLD = 10; o,gH*
f=--$o0U~
/* [))TL
* (non-Javadoc) RQO&F$R=
* 61pJVOe
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) De`p@`+<#~
*/ cVf}8qf)
public void sort(int[] data) { yKB&][)&
int[] temp=new int[data.length]; AI,Jy%62/
mergeSort(data,temp,0,data.length-1); J^gElp
} U'p-Ko#
d1BE;9*/7
private void mergeSort(int[] data, int[] temp, int l, int r) { <,+nS%a
int i, j, k; hF^y4v|5
int mid = (l + r) / 2; BN%;AQV
if (l == r) ^-2|T__
return; nm#,oX2C
if ((mid - l) >= THRESHOLD) |))O3]-
mergeSort(data, temp, l, mid); *Y`c.n"
else $_f"NE}
insertSort(data, l, mid - l + 1); W|CZA
if ((r - mid) > THRESHOLD) d:8c}t2X
mergeSort(data, temp, mid + 1, r); DIBoIWSuR
else UUR+PfY
insertSort(data, mid + 1, r - mid); rsn^YC
*O'`&J
for (i = l; i <= mid; i++) { <?FkwW\?
temp = data; p;Nq(=] \
} i`^[_
for (j = 1; j <= r - mid; j++) { *!MMl]gU?
temp[r - j + 1] = data[j + mid]; CmxQb,Uls
} p6X-P%s
int a = temp[l]; 4l'`q+^-
int b = temp[r]; sR;u#".
for (i = l, j = r, k = l; k <= r; k++) { ^m['VK#?
if (a < b) { +3[8EM#g
data[k] = temp[i++]; I=2b)"t0
a = temp; xG WA5[YV
} else { )F_nK f"a
data[k] = temp[j--]; 7S2"e[-x
b = temp[j]; ;6M [d
} UY(\T8
} (vFO'jtcB-
} L*FQ`:lZ
TW6F9}'f&
/** k}]M`ad
* @param data k`w/
* @param l dJ{q}U
* @param i weH3\@
*/ ] @:x<>
private void insertSort(int[] data, int start, int len) { L;-V Yo#
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); qLV3Y?S!L
} 89x;~D1
} $`[TIyA9!
} #z+?t
} G!+Mu2
C6'K)P[p
堆排序： 3sD|R{
&2bqL!k
package org.rut.util.algorithm.support; {H*
tb4^+&.GS
import org.rut.util.algorithm.SortUtil; c~+KrWbZ~
JwQ/A[b
/** YQcaWd(
* @author treeroot sC A
* @since 2006-2-2 {y'4&vt<~
* @version 1.0 EbG&[v
*/ wjfq"7Q
public class HeapSort implements SortUtil.Sort{ [HI$[:[
G6dUm_iB
/* (non-Javadoc) GvZ[3GT
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Y?$
*/ ( k,?)
public void sort(int[] data) { ]!j%Ad
MaxHeap h=new MaxHeap(); ~1{ppc+
h.init(data); gD2P)7:
for(int i=0;i h.remove(); &$ud;r#
System.arraycopy(h.queue,1,data,0,data.length); 7pou(U
} loC~wm%Ql
t3h){jZ
private static class MaxHeap{ txvo7?Y*4
<PiO %w{
void init(int[] data){ q}!h(-y}5n
this.queue=new int[data.length+1]; P)cEYk
for(int i=0;i queue[++size]=data; )xiu \rC
fixUp(size); }m'n1tm;
} h-kmZ<p|^
} S+#|j
b;%t*?t
private int size=0; X`1R&K;z^
B%tWi
private int[] queue; <uxLG;R
BNj_f
public int get() { ^,,}2dsb>
return queue[1]; kIX1u<M~
} ,ryL("G
\h_q]
public void remove() { b]fx
SortUtil.swap(queue,1,size--); ]Axz}:
fixDown(1); {0j_.XZ
} G[`1Yw$
file://fixdown tU5uL.( O
private void fixDown(int k) { X^Z!!KTH
int j; ?^M,Mt
while ((j = k << 1) <= size) { Bp3E)l
if (j < size %26amp;%26amp; queue[j] j++; 9}u,`&
if (queue[k]>queue[j]) file://不用交换 cPD_=.&
break; ]8}51y8
SortUtil.swap(queue,j,k); TN1pg
k = j; #c5jCy}n
} .] sJl
} tAF?.\x"g
private void fixUp(int k) { _'LZf=V0
while (k > 1) { I#&r5Q
int j = k >> 1; K)BQ0v.:[
if (queue[j]>queue[k]) ]%)<9]}
break; LP=j/qf|
SortUtil.swap(queue,j,k); jx]P:]
k = j; xC,x_:R`
} ~Ix2O
} KWZhCS?[(
PO`p.("h
} sVK?sBs]
iN[x *A|h
} L23}{P
d<6F'F^w.7
SortUtil： D]]wJQU2
})H d]a
package org.rut.util.algorithm; ,-4NSli
?B1Zfu0
import org.rut.util.algorithm.support.BubbleSort; \3$!)z
import org.rut.util.algorithm.support.HeapSort; [/CGV8+
import org.rut.util.algorithm.support.ImprovedMergeSort; ]7O<|8n!d
import org.rut.util.algorithm.support.ImprovedQuickSort; RZzHlZ
import org.rut.util.algorithm.support.InsertSort; [mA-sl]
import org.rut.util.algorithm.support.MergeSort; `8ac;b
import org.rut.util.algorithm.support.QuickSort; G aV&y
import org.rut.util.algorithm.support.SelectionSort; )1uiY f&k
import org.rut.util.algorithm.support.ShellSort; S^eem_C
z#^fS |
/** n^Ca?|} ,
* @author treeroot UX@%1W!8
* @since 2006-2-2 ]>t~Bcnm
* @version 1.0 WVdV:vJ-
*/ "XR=P> xk
public class SortUtil { "`$,qvNN
public final static int INSERT = 1; L~Gr,i
public final static int BUBBLE = 2; C9!t&<\}
public final static int SELECTION = 3; ,~1'L6Ri?
public final static int SHELL = 4; mGjB{Q+
public final static int QUICK = 5; :\\NK/"
public final static int IMPROVED_QUICK = 6; )l7XZ_gw'
public final static int MERGE = 7; ^#HaH
public final static int IMPROVED_MERGE = 8; dFm_"135
public final static int HEAP = 9; 6ZqU:^3
0%ul6LvM
public static void sort(int[] data) { ;xZ+1zmL0
sort(data, IMPROVED_QUICK); 2R[v*i^S
} ;6W]f([
private static String[] name={ `tkoS
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ]n!V
}; IZ=Z=k{
wa"0`a:`;
private static Sort[] impl=new Sort[]{ i]v3CY|3AI
new InsertSort(), c/|{yp$Ga>
new BubbleSort(), 'J,UKK\5
new SelectionSort(), 2dD"^z{
new ShellSort(), ?UtKu
new QuickSort(), FDMQLxf
new ImprovedQuickSort(), l<v{8:,e#
new MergeSort(), rNP;53FtZl
new ImprovedMergeSort(), C/k#gLF`
new HeapSort() e~]P _53
}; 5pCicwea#
/5NWV#-
public static String toString(int algorithm){ cNWmaCLN$
return name[algorithm-1]; C4mkt2Eb0a
} :zHSy&i`
yKML{N1D
public static void sort(int[] data, int algorithm) { 9xQ|Uad+%
impl[algorithm-1].sort(data); w <r*&
} imM!Me 0TE
[k7(t|Q{
public static interface Sort { 7X$CJ%6b
public void sort(int[] data); Q9bnOvKe|
} YWIA(p8Qkk
)I%M]K]F
public static void swap(int[] data, int i, int j) { C*YQ{Mz(f
int temp = data; Zux L2W
data = data[j]; OxJHhF
data[j] = temp; .x=abA$!9
} y" =?l
} (Y~/9a4X