[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; 3i1e1Lj1
} ^yLiyRe\
int i1=l; Qb "\j
int i2=mid+1; G-FeDP
for(int cur=l;cur<=r;cur++){ o2p;$W4`
if(i1==mid+1) qz]b8rX
data[cur]=temp[i2++]; 2^Y@e=^A
else if(i2>r) ]M2<b:yo
data[cur]=temp[i1++]; 2e~ud9,
else if(temp[i1] data[cur]=temp[i1++]; {|dU|h
else -jN:~.
data[cur]=temp[i2++]; G.Z4h/1<
} Z*r;"WHB
} bEx8dc`Q
NlLgXn!
} Tgxxm
B#Sg:L9Tr'
改进后的归并排序: ;yd[QT<I<
S#gIfb<D
package org.rut.util.algorithm.support; !l2=J/LJj
qU!xh)
import org.rut.util.algorithm.SortUtil; }~/u%vI@M5
Wk3R6 V
/** MZ9{*y[z
* @author treeroot z +NxO!y
* @since 2006-2-2 oEfy{54
* @version 1.0 @|A wT
*/ c;RB!`9"
public class ImprovedMergeSort implements SortUtil.Sort { &dA{<.
[Ol}GvzJ7
private static final int THRESHOLD = 10; #fT1\1[]
~r(/)w\
/* /eFudMl
* (non-Javadoc) 2RW^Nqc9
* Y<1]{4Wt
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ';T=kS<^_
*/ #p<1@,
public void sort(int[] data) { fg[]>:ZT.
int[] temp=new int[data.length]; SU.9;I !
mergeSort(data,temp,0,data.length-1); `8 Q3=^)3
} 2VSs#z!
f9`F~6$
private void mergeSort(int[] data, int[] temp, int l, int r) { LojEJ
int i, j, k; \gtI4zl*J
int mid = (l + r) / 2; E]Wnl\Be
if (l == r) J})#43P
return; # MpW\yX
if ((mid - l) >= THRESHOLD) pS [nKcyj
mergeSort(data, temp, l, mid); >LqW;/&S<
else :i{$p00 G
insertSort(data, l, mid - l + 1); xw1@&QwM
if ((r - mid) > THRESHOLD) cSMiNR
mergeSort(data, temp, mid + 1, r); ZH o#2{F
else (<.uvq61
insertSort(data, mid + 1, r - mid); {u7%Z}<0
X{8/]'(
for (i = l; i <= mid; i++) { '3n?1x
temp = data; qRV5qN2{XY
} BbCt_z'
for (j = 1; j <= r - mid; j++) { 7*{9 2_M
temp[r - j + 1] = data[j + mid]; H2EKr#(
} ]J`yh$a
int a = temp[l]; 4JOw@/nE
int b = temp[r]; ZW+[f$X
for (i = l, j = r, k = l; k <= r; k++) { <4DSk9/
if (a < b) { g)o?nAr
data[k] = temp[i++]; ,B^NH7A:
a = temp; hU3z4|~+
} else { K@0gBgN
data[k] = temp[j--]; G"_ 8`l
b = temp[j]; G{4~{{tI
} F0&BEJBkU
} RA5*QW
} ;c>Co:W
PP+-D~r`}
/** u0& aw
* @param data r$=YhI/=
* @param l J~\`8cds
* @param i fi/[(RBG
*/ Kzv*`
private void insertSort(int[] data, int start, int len) { sg=mkkD!g
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); =%wwepz6
} }Y{aVn&C
} Py}`k1t*f
} lDBn3U&z>
} .1O
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堆排序： ^+v6?%m
p-KMELB
package org.rut.util.algorithm.support; AdCi*="m
p_K``JE
import org.rut.util.algorithm.SortUtil; >_ )~"Ra
{e>E4(
/** $d@_R^]X
* @author treeroot GpW5)a
* @since 2006-2-2 o*d+W7l
* @version 1.0 vai.w-}Z
*/ Wix/Az
public class HeapSort implements SortUtil.Sort{ n$z}DE5 #
<%@S-+D`]
/* (non-Javadoc) S6J7^'h
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +`@)87O
*/ jl!rCOLt4
public void sort(int[] data) { e-}b]\
MaxHeap h=new MaxHeap(); N*dO'ol
h.init(data); cqr4P`Oj
for(int i=0;i h.remove(); 9}\{0;9
System.arraycopy(h.queue,1,data,0,data.length); Hl@)j
} U?%1:-#F
K >-)O=$s
private static class MaxHeap{ dc ]+1 A
Do&em8i z
void init(int[] data){ d#?.G3YmK
this.queue=new int[data.length+1]; )$h<9e
for(int i=0;i queue[++size]=data; A;pVi;7
fixUp(size); b IS3
} h^u 9W7.
} m' LRP:9v
@kq~q;F
private int size=0; ~ jR:oN
G^Z SQ!
private int[] queue; ZTq"SQ>ym
c4T8eTKU
public int get() { E"EBj7<s
return queue[1]; ddf#c,SQ
} ,mu=#}a@}
xz@/^Cj
public void remove() { ~@3X&E0S
SortUtil.swap(queue,1,size--); h{&X`$
fixDown(1); "`sr#
} %:^|Q;xe
file://fixdown >bKN$,Qen
private void fixDown(int k) { b~M3j&
int j; b r"47i
while ((j = k << 1) <= size) { (c{<JYEC
if (j < size %26amp;%26amp; queue[j] j++; %E!^SF?Y
if (queue[k]>queue[j]) file://不用交换 tkN5|95
break; $LS$:%i4
SortUtil.swap(queue,j,k); 3#d5.Ut
k = j; INm21MS$
} Nb))_+/
} LI>tN R~
private void fixUp(int k) { ~S\Ee 2e>
while (k > 1) { *?k~n9n5U
int j = k >> 1; gC}r$ZB(
if (queue[j]>queue[k]) JN9 W:X.
break; YKjm_)8]w
SortUtil.swap(queue,j,k); uP'x{Pr)
k = j; \2F$FRWo
} 7?@s.Sz|fV
} ews4qP
Qx9lcO_
} XJ3 5Z+M
D6 2xC5
} 0?D`|x_
:{iS0qJ
SortUtil： t%<@k)hd~G
%fS__Tb#u
package org.rut.util.algorithm; /$'R!d5r
ebbC`eFD
import org.rut.util.algorithm.support.BubbleSort; c,$ >u,4
import org.rut.util.algorithm.support.HeapSort; {b|:q>Be8
import org.rut.util.algorithm.support.ImprovedMergeSort; MEOVw[hO
import org.rut.util.algorithm.support.ImprovedQuickSort; [")3c)OH|
import org.rut.util.algorithm.support.InsertSort; 63ig!-9F
import org.rut.util.algorithm.support.MergeSort; kIHfLwh9N
import org.rut.util.algorithm.support.QuickSort; .A: #l?
import org.rut.util.algorithm.support.SelectionSort; H_RVGAbU
import org.rut.util.algorithm.support.ShellSort; QEl:>HG
IF<?TYy=3B
/** %p5%Fs`sd
* @author treeroot %UquF
* @since 2006-2-2 Ig&=(Kmr
* @version 1.0 v&[Ff|>
*/ 9=(*#gRd
public class SortUtil { J|DID+M
public final static int INSERT = 1; 3y}0J @
public final static int BUBBLE = 2; #d+bld\
public final static int SELECTION = 3; "=7y6bM
public final static int SHELL = 4; xLfx/&2
public final static int QUICK = 5; k79"xyXX
public final static int IMPROVED_QUICK = 6; ogt<vng
public final static int MERGE = 7; R %QgOz3`
public final static int IMPROVED_MERGE = 8; P4{8pO]B
public final static int HEAP = 9; l]BIFZ~
]!yuD/4A
public static void sort(int[] data) { `"N56
sort(data, IMPROVED_QUICK); 3JB?G>\!
} D^(Nijl9U
private static String[] name={ W'Wr8~{h
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 5*.JXxE;U
}; JLS|G?#0
gr\UI!]F
private static Sort[] impl=new Sort[]{ .OLm{
new InsertSort(), kaSy 9Y{
new BubbleSort(), %3L4&W_T
new SelectionSort(), %P!6cyQS
new ShellSort(), C_SJ4Sh
new QuickSort(), KrcL*j&^
new ImprovedQuickSort(), +{Qk9Z
new MergeSort(), BDW%cs
new ImprovedMergeSort(), aCu 8 D!
new HeapSort() \2q!2XWgK
}; ^Ge3"^x1
-)biSU,
public static String toString(int algorithm){ 3$fzqFo
return name[algorithm-1]; 6#sd"JvtQ
} 9oOr-9t3
_*d8:|qw
public static void sort(int[] data, int algorithm) { o!q3+Pp;}
impl[algorithm-1].sort(data); D4e*Wwk
} U)Cv_qe
i%jti6z$Hr
public static interface Sort { hn:
public void sort(int[] data); -YF]k}|
} ,>6s~'
sEpY&6*
public static void swap(int[] data, int i, int j) { @" -[@
int temp = data; Z`L-UQJ.
data = data[j]; UY@^KT]
data[j] = temp; 9ihB;m'C)
} H_*;7/&
} q*`1<9{H