[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; 6ZXRb
} a!j{A?7Kw.
int i1=l; Z0 c|;
int i2=mid+1; ;t/KF"
for(int cur=l;cur<=r;cur++){ $F/xv&t
if(i1==mid+1) .8|"@
data[cur]=temp[i2++]; qP9`p4c8i
else if(i2>r) b$/7rVH!
data[cur]=temp[i1++]; 7$Cv=8
else if(temp[i1] data[cur]=temp[i1++]; R_80J=%0
else f?QP(+M5.
data[cur]=temp[i2++]; Tkj F/zv
} /mn'9=ks
} 7 $dibTER
*y~~~ 'J/
} V>4v6)N
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改进后的归并排序: "`KT7
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package org.rut.util.algorithm.support; eV9,G8
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import org.rut.util.algorithm.SortUtil; b-J6{=k^
[t?:CgI)E
/** Sq`Zuu9t
* @author treeroot .;dI&0Z
* @since 2006-2-2 /i"1e:cK
* @version 1.0 y=}o|/5"
*/ Pp;OkI``[
public class ImprovedMergeSort implements SortUtil.Sort { MdnapxuS
cVaGgP}\
private static final int THRESHOLD = 10; 0c&DSL}6
,y)V5 c1
/* T|--ZRYn
* (non-Javadoc) F~GIfJU
* AI$\wp#aw
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `{ \)Wuw
*/ &<(&u`S
public void sort(int[] data) { 'qoaMJxN`
int[] temp=new int[data.length]; <I{Yyl^
mergeSort(data,temp,0,data.length-1); Rf!$n7& \
} mW3IR3b
j9f QV
private void mergeSort(int[] data, int[] temp, int l, int r) { "i%=QON`
int i, j, k; HC$}KoZkC
int mid = (l + r) / 2; A4)TJY 3g
if (l == r) Z>.('
return; g T0@pxl
if ((mid - l) >= THRESHOLD) X|Nb81M
mergeSort(data, temp, l, mid); LO,:k+&A+
else LoO"d'{
insertSort(data, l, mid - l + 1); ?0d#O_la3
if ((r - mid) > THRESHOLD) }gQnr;lv
mergeSort(data, temp, mid + 1, r); W#L/|K!S
else T9YrB
insertSort(data, mid + 1, r - mid); QOv@rP/
w*7wSP
for (i = l; i <= mid; i++) { Dd:48sN:Jq
temp = data; b}ODc]3
} :>3?|Z"Aj
for (j = 1; j <= r - mid; j++) { }n k[WW
temp[r - j + 1] = data[j + mid]; !dwa. lZ&X
} WFfn:WSWU
int a = temp[l]; l(Uwci
int b = temp[r]; rrs0|=
for (i = l, j = r, k = l; k <= r; k++) { !wo
if (a < b) { G9~ 4?v6:
data[k] = temp[i++]; /!pJ"@
a = temp; CH0Nkf
} else { j HEt
data[k] = temp[j--]; *dxE (dP
b = temp[j]; 6&"GTK
} pE{Ecrc3|
} B#o6UO\
} $g }aH(vf
V17!~
/** =DXN`]uN
* @param data 4 udW6U
* @param l qy/t<2'
* @param i Wfsd$kN6{
*/ be HEAQ
private void insertSort(int[] data, int start, int len) { d_Z?i#r0l
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); =F46v{la
} ;esOe\zjE
} RVh{wg
} Lwo9s)j<e
} YLb$/6gj6
Oh,]"(+
堆排序： +?6@%mW'
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package org.rut.util.algorithm.support; && b;Wr
:c9 H2
import org.rut.util.algorithm.SortUtil; X?'pcYSL
|Zdl[|kX
/** }qBmt>#
* @author treeroot 5I/lFoy7
* @since 2006-2-2 fN6n2*wr(
* @version 1.0 pL,l
*/ yKC1h`2
public class HeapSort implements SortUtil.Sort{ 1H8/bD
[=^Wj`;
/* (non-Javadoc) Yb%#\.M/y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) vU9:`@beu
*/ L fZF
public void sort(int[] data) { ;]W@W1)$
MaxHeap h=new MaxHeap(); ^`bMFsP
h.init(data); c-ql
for(int i=0;i h.remove(); D"&Sd@a{
System.arraycopy(h.queue,1,data,0,data.length); 6>z,7 [
} *$@u`nM
A}(o1wuw
private static class MaxHeap{ FzG>iC}
%RzCJxT
void init(int[] data){ H4<Q}([w
this.queue=new int[data.length+1]; 'i4L.&
for(int i=0;i queue[++size]=data; l\ VrD2j8
fixUp(size); $t0JfDd6Ky
} _7'5IA
} _Sl3)
&mm!UJ
private int size=0; QSOG(}w
9A *gW j
private int[] queue; ]D,\(|
4B)%I`
public int get() { [OR"9W&
return queue[1]; 6!wk5#
} (QQkXlJ
E@4/<;eKK
public void remove() { .sD=k3d
SortUtil.swap(queue,1,size--); ~nApRC)0
fixDown(1); S1U[{R?,
} w[AL'1s]
file://fixdown ]88qjKL
private void fixDown(int k) { \}_,g
int j; -B?cF9
while ((j = k << 1) <= size) { aP#/%
if (j < size %26amp;%26amp; queue[j] j++; Q"H/RMo-
if (queue[k]>queue[j]) file://不用交换 I:("f+ H
break; z, n[}Q#u
SortUtil.swap(queue,j,k); tTWEhHQ`
k = j; 'UM *7
} d{Owz&PL
} A#Y:VavQ?
private void fixUp(int k) { OsKtxtLO
while (k > 1) { [pInF Qh6
int j = k >> 1; *D.Ajd.G
if (queue[j]>queue[k]) 9dWz3b1[]
break; dg_w$#
SortUtil.swap(queue,j,k); cZ#%tT#
k = j; F6aC'<#/
} KtGbpcS$f
} !;0K=~(Y^
rR 86D
} 1xInU_SPf
#/{3qPN?@
} K~B
=}.gU WV
SortUtil： P>(FCX
;; ;=)'o
package org.rut.util.algorithm; n~.$iN
buT6)~lw
import org.rut.util.algorithm.support.BubbleSort; _n_()at)
import org.rut.util.algorithm.support.HeapSort; ;a| ~YM2I
import org.rut.util.algorithm.support.ImprovedMergeSort; ck\W'Y*Q7
import org.rut.util.algorithm.support.ImprovedQuickSort; iu3L9UfL[
import org.rut.util.algorithm.support.InsertSort; +wf9!_'
import org.rut.util.algorithm.support.MergeSort; 5lM2nhlf'b
import org.rut.util.algorithm.support.QuickSort; I&31jn_o /
import org.rut.util.algorithm.support.SelectionSort; # 1dg%
import org.rut.util.algorithm.support.ShellSort; ;#:AM;
-&=dl_m
/** @w`wJ*I4,
* @author treeroot _*MK"
* @since 2006-2-2 EX#AJ>?V(
* @version 1.0 dqs~K7O^E
*/ eze%RjO}
public class SortUtil { 2=/-,kOL_
public final static int INSERT = 1; zTc*1(^
public final static int BUBBLE = 2; Qj*.Z4ue
public final static int SELECTION = 3; xF@&wg
public final static int SHELL = 4; `.J17mQe"
public final static int QUICK = 5; >H ?k0M`L
public final static int IMPROVED_QUICK = 6; >##Z}auY
public final static int MERGE = 7; D:/q<<|
public final static int IMPROVED_MERGE = 8; "%\hDL;
public final static int HEAP = 9; 57-Hx;
0[e!/*_V
public static void sort(int[] data) { 6?;z\AP&
sort(data, IMPROVED_QUICK); 9g>)7Ne
} s^K2,D]P
private static String[] name={ hidQOh
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" zo8D"
}; 1GqSY|FSGp
r$8'1s37`
private static Sort[] impl=new Sort[]{ P=_fYA3
new InsertSort(), /KNDo^P
new BubbleSort(), ;S '?l0
new SelectionSort(), ,Aai-AGG@
new ShellSort(), {M5t)-
new QuickSort(), {_/o' 6
new ImprovedQuickSort(), /;Hr{f jl{
new MergeSort(), _TGs .t
new ImprovedMergeSort(), *3rs+0
new HeapSort() igW* {)h3
}; -%@ah:iJ
lo(C3o'
public static String toString(int algorithm){ wjD<"p;P
return name[algorithm-1]; +`_0tM1
} oQObr
O9ps?{g
public static void sort(int[] data, int algorithm) { R TpNxr{[
impl[algorithm-1].sort(data); &T~X`{V]`
} m|F1_Ggz
iER@_?
public static interface Sort { \~"Ub"~I
public void sort(int[] data); qz{9ND|)
} YO$D-
e6Y>Bk
public static void swap(int[] data, int i, int j) { <r.QS[:h
int temp = data; pCA`OP);=
data = data[j]; IEMa/[n/
data[j] = temp; -v.\W y~\
} zh*D2/r
} FK593z