[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; g#;w)-Zj
} mh!;W=|/"
int i1=l; 2`Xy}9N/Y
int i2=mid+1; :grJ}i-D
for(int cur=l;cur<=r;cur++){ auqM>yx
if(i1==mid+1) ,K8O<Mw8
data[cur]=temp[i2++]; E/9 U0
else if(i2>r) `ej
data[cur]=temp[i1++]; _gjsAbM
else if(temp[i1] data[cur]=temp[i1++]; GmB7@-[QA%
else )%U&z>^P
data[cur]=temp[i2++]; Tz1St{s\
} b/ h,qv
} !j6]k^ra
JGp~A#H&
} _H|x6X1-
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改进后的归并排序: HiEXw}Hkz
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package org.rut.util.algorithm.support; b;O]@kBB
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import org.rut.util.algorithm.SortUtil; SEF/D0
NA>h$N
/** _) 2fXG!
* @author treeroot b&B<'Wb
* @since 2006-2-2 0Np}O=>
* @version 1.0 cOthq87:
*/ KD*,u{v;
public class ImprovedMergeSort implements SortUtil.Sort { -kxNJ Gc?
$ckX H,l_
private static final int THRESHOLD = 10; mF[w-<:.d
@;M( oFS9
/* Xz&Hfs"/J
* (non-Javadoc) 2c@R!*
* $%"i|KTsv:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :f?\ mVS+
*/ v{^_3 ]
public void sort(int[] data) { 7^#f<m;Ar!
int[] temp=new int[data.length]; ZFNM>C^
mergeSort(data,temp,0,data.length-1); Ey=(B'A~
} MbC7`Sp&i
(EGsw o
private void mergeSort(int[] data, int[] temp, int l, int r) { k:Sxs+)?1
int i, j, k; Q5b?- P
int mid = (l + r) / 2; W)ihk\E
if (l == r) (p'yya{(
return; B1oi]hDy
if ((mid - l) >= THRESHOLD) KlDW'R$
mergeSort(data, temp, l, mid); `Lb^!6`)
else QpwOrxI}
insertSort(data, l, mid - l + 1); _>%P};G{>
if ((r - mid) > THRESHOLD) ?Ko)AP
mergeSort(data, temp, mid + 1, r); la>:%SD
else 4=td}%
insertSort(data, mid + 1, r - mid); N}b/;Y
$As;Tvw.
for (i = l; i <= mid; i++) { ,y>,?6:>
temp = data; Vrzx;V%
} im|( 4f
for (j = 1; j <= r - mid; j++) { q%%8oaEI
temp[r - j + 1] = data[j + mid]; lfp[(Ph)9
} hJ\IE?+
int a = temp[l]; a7s+l=
int b = temp[r]; =<R")D]4z
for (i = l, j = r, k = l; k <= r; k++) { u+UtvzUC
if (a < b) { A!\ouKyayS
data[k] = temp[i++]; \7rFfN3
a = temp; qPGpN0M`
} else { zgRZgVj
data[k] = temp[j--]; !|;^
b = temp[j]; iz!E1(z(
} . >[d:0
} q&OF?z7H
} Qn'Do4Le
;[TC`DuNj0
/** =NLsT.aa
* @param data 'RK.w^
* @param l XG FjqZr`
* @param i ~XGBE
*/ @zo}#.g
private void insertSort(int[] data, int start, int len) { &HBqweI
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); jN 9|q
} l?Vm/YXb
} FeOo;|a
} HYm |
} gv)F`uRWA
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堆排序： FN jT?*
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package org.rut.util.algorithm.support; nF$n[:
X,-QxV=lc)
import org.rut.util.algorithm.SortUtil; bW03m_<M<1
7{F(NJUO1
/** *FhD%><
* @author treeroot r*?rwtFtg
* @since 2006-2-2 {6H%4n
* @version 1.0 +6paM
*/ 8 Z|c!QIU
public class HeapSort implements SortUtil.Sort{ qZw4"&,j$
#m>Rt~(,S
/* (non-Javadoc) Z{-x}${
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ip c2Qsa
*/ 70pt5O3]
public void sort(int[] data) { LF o{,%B
MaxHeap h=new MaxHeap(); >!u@>
h.init(data); Cwo(%Wc
for(int i=0;i h.remove(); QY14N{]T\p
System.arraycopy(h.queue,1,data,0,data.length); i>=d7'oR
} yLv jfP1
0u0<)gdX
private static class MaxHeap{ zx)^!dEMM
F.;G6
void init(int[] data){ J6m`XC
this.queue=new int[data.length+1]; \1`L-lz
for(int i=0;i queue[++size]=data; `v2]Jk<
fixUp(size); 8R!3}kx
} z9> yg_Q
} MYVUOd,
oL?[9aww
private int size=0; >Hh8K<@NL
-Vj'QqZ
private int[] queue; Zmx[u_NG
%y@iA91K
public int get() { /D9FjOP
return queue[1]; ,p(4OZz5,
} R<r"jOd]
!83x,*O
public void remove() { #3uBq(-Z
SortUtil.swap(queue,1,size--); iEDZ\\,
fixDown(1); x.>E7 +
} Y~RZf /`
file://fixdown {d|R67~V
private void fixDown(int k) { R=D\VIu,Z
int j; , N:'Z
while ((j = k << 1) <= size) { !*46@sb:
if (j < size %26amp;%26amp; queue[j] j++; OtopA)
if (queue[k]>queue[j]) file://不用交换 WIwbf|\
break; |pIA9/~Z
SortUtil.swap(queue,j,k); X^3 0a*sj
k = j; )g4oUZDF
} V/j]UK0$
} cz_4cMgxu
private void fixUp(int k) { ~"l a2
while (k > 1) { //--r5Q
int j = k >> 1; Z$R2Z$f
if (queue[j]>queue[k]) %iPu51+=
break; 1SBc:!2
SortUtil.swap(queue,j,k); uCK!lq-
k = j; 1B3,lYBM
} 4'BzW Z;_a
} -;$+`<%
>/"XX,3
} @4:cn
PN:8H>
} nf< <]iHf
< %Qw dEO
SortUtil： X.0/F6U
1A23G$D
package org.rut.util.algorithm; H+zn:j@~L
X7kJWX
import org.rut.util.algorithm.support.BubbleSort; x7e
import org.rut.util.algorithm.support.HeapSort; +DKrX
import org.rut.util.algorithm.support.ImprovedMergeSort; )!dELS\ix
import org.rut.util.algorithm.support.ImprovedQuickSort; f5a%/1?
import org.rut.util.algorithm.support.InsertSort; @"9y\1u
import org.rut.util.algorithm.support.MergeSort; [Hdk=p
import org.rut.util.algorithm.support.QuickSort; @{_PO{=\C
import org.rut.util.algorithm.support.SelectionSort; \3q{E",\>@
import org.rut.util.algorithm.support.ShellSort; '$)Wp_
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/** >ge-yK 1
* @author treeroot [[D}vL8d
* @since 2006-2-2 qn@Qd9Sf
* @version 1.0 89l_%To
*/ HkvCQH
public class SortUtil { nGW wXySq
public final static int INSERT = 1; p)ZlQ.d#Y
public final static int BUBBLE = 2; {(wV>Oc>Jw
public final static int SELECTION = 3; 6o;lTOes
public final static int SHELL = 4; !W$3p'8Tu
public final static int QUICK = 5; .WL507*"Ce
public final static int IMPROVED_QUICK = 6; E08AZOY&g
public final static int MERGE = 7; 9+QLcb
public final static int IMPROVED_MERGE = 8; svpWABO
public final static int HEAP = 9; P[P!WLr""
@7lZ{jV$
public static void sort(int[] data) { !^axO
sort(data, IMPROVED_QUICK); 8Z3+S)6
} D~f.)kkC4
private static String[] name={ 8gC(N3/E"
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" dc&Qi_W
}; NkO$ M
n^Z?u9VR
private static Sort[] impl=new Sort[]{ `"ie57-
new InsertSort(), 66L*6O4
new BubbleSort(), @oRYQ|.R
new SelectionSort(), 3SIB #"9
new ShellSort(), WgPL4D9=
new QuickSort(), TaolX*$5
new ImprovedQuickSort(), 0jq&i#yNB
new MergeSort(), b!.# `.
new ImprovedMergeSort(), Jy|Mfl%d
new HeapSort() L0&!Qct
}; g"Ii'JZ?
*fd` .}
public static String toString(int algorithm){ oub4/0tN,~
return name[algorithm-1]; LnJ7i"Q
} bfpW^y
P;_dilG
public static void sort(int[] data, int algorithm) { U'lmQrF!
impl[algorithm-1].sort(data); |x5w;=
} w@:o:yLS
Osy5|Ts
public static interface Sort { r*p%e\ 3
public void sort(int[] data); $!vi:+ED
} ~r>UjC_ B:
mmjB1L
public static void swap(int[] data, int i, int j) { 9MYt4
int temp = data; 8c/Ii"1
data = data[j]; 3o^V$N.
data[j] = temp; {W4t]Ff
} ?,8b-U#A1
} G/ ^|oJ/G