[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; + x_wYv
} ?;8M^a/
int i1=l; \ j]~>9
int i2=mid+1; v+tO$QZ`
for(int cur=l;cur<=r;cur++){ ?"@ET9
if(i1==mid+1) }%{=].)L
data[cur]=temp[i2++]; (G5T%[/U
else if(i2>r) K<,Y^3]6?
data[cur]=temp[i1++]; N&B>#:
else if(temp[i1] data[cur]=temp[i1++]; dy_.(r5[L]
else DyI2Ye
data[cur]=temp[i2++]; $DV-Ieb
} fH!=Zb_{8
} H!JWc'(<$
EHWv3sR-
} DN|vz}s
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改进后的归并排序: $i&\\QNn
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package org.rut.util.algorithm.support; \|!gPc%s
u'@Ely
import org.rut.util.algorithm.SortUtil; 9}whWh
&5/JfNe3
/** &^ceOV0+
* @author treeroot =[(%n94
* @since 2006-2-2 m9g^ -X
* @version 1.0 =n }Yqny
*/ W}k[slqZA
public class ImprovedMergeSort implements SortUtil.Sort { ~\bHfiIDy
L`[F~$|
private static final int THRESHOLD = 10; *'^:S#=
%EB;1
/* 0HPO"x3-O
* (non-Javadoc) Q}z{AZ
* ~mcZUiP9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) H8"tbU
*/ o@@w^##
public void sort(int[] data) { 3qcpf:
int[] temp=new int[data.length]; 5xv,!/@
mergeSort(data,temp,0,data.length-1); Fs9W>*(
} 8AX3C s_G
6+#,=!hF{
private void mergeSort(int[] data, int[] temp, int l, int r) { #x|VfN5f
int i, j, k; >;.*
int mid = (l + r) / 2; Gavkil
if (l == r) .ftUhg
return; J<-Fua^
if ((mid - l) >= THRESHOLD) WV~SL/k|
mergeSort(data, temp, l, mid); ~6fRS2u
else cB36p&%
insertSort(data, l, mid - l + 1); .6I%64m
if ((r - mid) > THRESHOLD) G%`cJdM
mergeSort(data, temp, mid + 1, r); |Qq+8IeYG
else ]Qy,#p'~&H
insertSort(data, mid + 1, r - mid); q\G{]dz?R
j>g9\i0O1
for (i = l; i <= mid; i++) { +9}' s{
temp = data; 0, "ZV}
} wJr/FE7c
for (j = 1; j <= r - mid; j++) { 2?pM5n
temp[r - j + 1] = data[j + mid]; R''Sfz>8
} ;>'SV~F
int a = temp[l]; (aBP|rxg
int b = temp[r]; mlmnkgl ]
for (i = l, j = r, k = l; k <= r; k++) { X{|k<^:
if (a < b) { SFOQM*H
data[k] = temp[i++]; 'U*udkn 2]
a = temp; ?xf~!D
} else { aH9L|BN*
data[k] = temp[j--]; )rS^F<C
b = temp[j]; 2PI #ie4
} b__n~\q_
} PKATw>zg<
} ~CJYQFt
cxk=| ?l
/** "vvFq ,c
* @param data s~#?9vW
* @param l >d)|r
* @param i "9.6\Y\*
*/ ~v,!n/('
private void insertSort(int[] data, int start, int len) { hXBqz9
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Zm5nLxM
} Q,O]x#
} <6gU2@1
} M`q#,Y?3^I
} :hi$}xHa
UfO'.8*v
堆排序： &8.z$}m
l!Nvn$hm
package org.rut.util.algorithm.support; Psg +\14
N/`g?B[
import org.rut.util.algorithm.SortUtil; o(BYT9|.kw
p$&_fzb
/** ~91uk3ST?
* @author treeroot ;9 R40qi
* @since 2006-2-2 Rf&^th}TH
* @version 1.0 HL|0d }
*/ >hh"IfIZ4
public class HeapSort implements SortUtil.Sort{ mT}Aje-L
v UJ sFR
/* (non-Javadoc) 5,g$|,Shv
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) a'c9XG}
*/ \"{/yjO|4
public void sort(int[] data) { aj% `x4eA
MaxHeap h=new MaxHeap(); '[0 3L9
h.init(data); %Tk}sfx
for(int i=0;i h.remove(); I*%&)Hj~
System.arraycopy(h.queue,1,data,0,data.length); ok8JnQC
} (}~ 1{C@
P2s^=J0@
private static class MaxHeap{ &fh.w]\
K1CMLX]m
void init(int[] data){ sz){uOI
this.queue=new int[data.length+1]; \=TWYj_Ah
for(int i=0;i queue[++size]=data; )GQD*b
fixUp(size); ntd ":BKi
} Nj"_sA p
} FC|y'j 0
!NQf< ch
private int size=0; GIJV;7~
C%qtCk_cN
private int[] queue; `V$cz88b
ZhxfI?i)l
public int get() { =rE`ib
return queue[1]; 0`zm>fh}
} jCdZ}M($
9QO!vx
public void remove() { a?f5(qW3
SortUtil.swap(queue,1,size--); mk$Yoz
fixDown(1); X*D5y8<
} Z.Lx^h+U
file://fixdown WcQZFtW
private void fixDown(int k) { #<^/yoH7C6
int j; #0#V$AA>
while ((j = k << 1) <= size) { .oB'ttF1
if (j < size %26amp;%26amp; queue[j] j++; y$"~^8"z
if (queue[k]>queue[j]) file://不用交换 C:TuC5Sr
break; l93Q"*_
SortUtil.swap(queue,j,k); .XZ 71E
k = j; 9e|{z9z[l
} 7zi^{]
} ~j\;e
private void fixUp(int k) { yS(=eB_
while (k > 1) { M<hs_8_*
int j = k >> 1; bDcWb2lqs
if (queue[j]>queue[k]) NiU tH
break; /61ag9pN
SortUtil.swap(queue,j,k); gPn%`_d5
k = j; 4B%5-VQ
} 1L(Nfkh
} bTI&#Hu
zYNM<W;
} ` Mv5!H5l
-+Awm{X_@
} +$an*k9
5Od(J5`
SortUtil： '8((;N|I^
;Ln7_
package org.rut.util.algorithm; 8*Nt&`@
gs<qi'B
import org.rut.util.algorithm.support.BubbleSort; #z1ch,*3;
import org.rut.util.algorithm.support.HeapSort; jn#N7%{Mk
import org.rut.util.algorithm.support.ImprovedMergeSort; G> 5=`
import org.rut.util.algorithm.support.ImprovedQuickSort; )PanJHtU
import org.rut.util.algorithm.support.InsertSort; 8EVF<@{]
import org.rut.util.algorithm.support.MergeSort; }(hYG"5
import org.rut.util.algorithm.support.QuickSort; [0%Gu5_\
import org.rut.util.algorithm.support.SelectionSort; D[FfJcV'$
import org.rut.util.algorithm.support.ShellSort; 5O4&BxQ~}
-;DE&~p
/** "|~B};|MFF
* @author treeroot EZa{C}NQ$2
* @since 2006-2-2 QL|:(QM
* @version 1.0 E|6Z]6[
*/ a#~Z5>{
public class SortUtil { n?KS]ar>
public final static int INSERT = 1; _tR.RAaa"
public final static int BUBBLE = 2; 1\7"I-
public final static int SELECTION = 3; \!4ghev3
public final static int SHELL = 4; ?yd(er<_f
public final static int QUICK = 5; 9_CA5?y$:
public final static int IMPROVED_QUICK = 6; 4<K ,w{I
public final static int MERGE = 7; LMhY"/hAXa
public final static int IMPROVED_MERGE = 8; j#.-MfB
public final static int HEAP = 9; D;T r
FZ'>LZ
public static void sort(int[] data) { PY3Vu]zD
sort(data, IMPROVED_QUICK); \c@qtIc
} %<#$:Qb.
private static String[] name={ sD8xH
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" sou$qKoG01
}; \?`d=n=
,BN}H-W\2
private static Sort[] impl=new Sort[]{ 9"u@<]
new InsertSort(), C`K9WJOD
new BubbleSort(), qjRiTIp9q
new SelectionSort(), :4L5@>b-
new ShellSort(), ztxQv5=:,
new QuickSort(), =B 4gEWR
new ImprovedQuickSort(), VAB&&AL
new MergeSort(), h"Yqm"U/
new ImprovedMergeSort(), 0m| Gp
new HeapSort() xuH<=-O>ki
}; gQcr'[[a
Qak@~b
public static String toString(int algorithm){ F|3FvxA
return name[algorithm-1]; z$im4'\c
} A?Hjz%EcW
<)*g7
public static void sort(int[] data, int algorithm) { Q`wA"mw6k
impl[algorithm-1].sort(data); C?c-V,
} p?gLW/n
MBTt'6M
public static interface Sort { SO jDtZ
public void sort(int[] data); dvdBRrf
} DEeL48{R
xo"4mbTV
public static void swap(int[] data, int i, int j) { =)UiI3xHk
int temp = data; Pc-8L]2oaF
data = data[j]; qt&"cw
data[j] = temp; @p'v.;~#
} }4ghT(C}$
} rp[oH=&