[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; W.BX6
} K-[;w$np0
int i1=l; qSt\ 6~
int i2=mid+1; vj9'5]!~q
for(int cur=l;cur<=r;cur++){ U".5x~UC
if(i1==mid+1) f7/M_sx
data[cur]=temp[i2++]; :.u2^*<
else if(i2>r) zX]l$Q+
data[cur]=temp[i1++]; <%.lPO]&E
else if(temp[i1] data[cur]=temp[i1++]; _Kbj?j
else De2$:?
data[cur]=temp[i2++]; yz"hU
} /ke[nr
} kD(#LM<9s
f>|Wd;7l:
} "B>8on8O
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改进后的归并排序: jq%}=-%KE
<G'M/IR a
package org.rut.util.algorithm.support; a"l\_D'.K8
(/FG#D.
import org.rut.util.algorithm.SortUtil; dQ_hlx!J
Rg^ps
/** 9N<=,!;5~s
* @author treeroot U>sEFzBup
* @since 2006-2-2 v#EFklOP
* @version 1.0 I^HwXp([
*/ #lO ^PK
public class ImprovedMergeSort implements SortUtil.Sort { T;]Ob3(BpW
9Y@ eXP
private static final int THRESHOLD = 10; vqZBDQ0
ZL:SJ,C
/* zI\+]U'
* (non-Javadoc) jYvl-2A'
* upZtVdd
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 10)RLh|+
*/ ZtmaV27s/
public void sort(int[] data) { L6#4A3yh
int[] temp=new int[data.length]; nSRNd A
mergeSort(data,temp,0,data.length-1); 7dv!
} B3pjli
pRzL}-[/v
private void mergeSort(int[] data, int[] temp, int l, int r) { )%PMDG|
int i, j, k; hiEYIx
int mid = (l + r) / 2; 1wm`a
if (l == r) Y`(~eNX^%
return; X%iJPJLza
if ((mid - l) >= THRESHOLD) Eg8b|!-')8
mergeSort(data, temp, l, mid); IRueq @4
else |sY
insertSort(data, l, mid - l + 1); D/JSIDd
if ((r - mid) > THRESHOLD) }+Q4s]
mergeSort(data, temp, mid + 1, r); b^&azUkMN
else bWSc&/9y
insertSort(data, mid + 1, r - mid); |28'<BL
;xiwyfqgE
for (i = l; i <= mid; i++) { axDa&7%
temp = data; >rJ**y
} cGR)$:
for (j = 1; j <= r - mid; j++) { <*WGvCh%w
temp[r - j + 1] = data[j + mid]; 3fA+{Y8S
} X6T[+]Gc
int a = temp[l]; W#E(?M[r
int b = temp[r]; h"/'H)G7_&
for (i = l, j = r, k = l; k <= r; k++) { 2W`WOBz
if (a < b) { Xs# _AX
data[k] = temp[i++]; >{9VXSc
a = temp; J@"UFL'^
} else { ,RM8D)m\
data[k] = temp[j--]; \I-e{'h
b = temp[j]; G.^)5!By
} QqRF?%7q"q
} cTS.yN({G
} \#WWJh"W
jvAjnh#
/** ;]b4O4C\
* @param data TLp2a<Iy
* @param l a DXaQ
* @param i Sc#3<nVg
*/ @}:E{J#g
private void insertSort(int[] data, int start, int len) { ?qi~8.<w
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); K~2sX>l
} j*[P\Cm
} /zb/am1#
} (z.n9lkfi
} ZNM9@;7
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堆排序： TET=>6
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package org.rut.util.algorithm.support; iF":c}$.
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import org.rut.util.algorithm.SortUtil; /CMgWGI
09trFj$L
/** 7(uz*~Z?`0
* @author treeroot :CK`v6 Qs
* @since 2006-2-2 DB65vM
* @version 1.0 ,|3_@tUl
*/ +RJKJ:W
public class HeapSort implements SortUtil.Sort{ WJu(,zM?G
>j3':>\U
/* (non-Javadoc) 7}y@VO6]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6wj o:I
*/ 9(OeH7
public void sort(int[] data) { d(TN(6g@
MaxHeap h=new MaxHeap(); ]jC{o,?s
h.init(data); h#KSKKNW
for(int i=0;i h.remove(); bmK
System.arraycopy(h.queue,1,data,0,data.length); 1#%H!GKvTU
} ot[ZFF\
|59)6/i
private static class MaxHeap{ |JF,n~n
*4NY"EwjN
void init(int[] data){ gzn:]Y^
this.queue=new int[data.length+1]; D)?%kNeA
for(int i=0;i queue[++size]=data; jf`w8*R
fixUp(size); fP5i3[T
} 5>+@.hPX
} TfT^.p*
r~YBj>}
private int size=0; }$ySZa9
.r{t&HO;Y
private int[] queue; M2p|&Z%
)[J!{$&y
public int get() { ~tyqvHC
return queue[1]; 9#:fQ!3`
} c0o Z7)*}
"igA^^?X1N
public void remove() { R9 Ab.t
SortUtil.swap(queue,1,size--); ]Idwy|eG
fixDown(1); \8!CKnfs
} {U$XHG
file://fixdown R]e&JoY
private void fixDown(int k) { Z37Dv;&ZD
int j; dor1(@no|
while ((j = k << 1) <= size) { |LZ{kD|
if (j < size %26amp;%26amp; queue[j] j++; G+Z ,ic
if (queue[k]>queue[j]) file://不用交换 ,Yx<"2 W
break; #b;k+<n[X
SortUtil.swap(queue,j,k); mRRZ/m?A(
k = j; E;{CoL
} E:B"!Y6
} vs[!B-
private void fixUp(int k) { !j`<iPI7B
while (k > 1) { u"V,/1++\
int j = k >> 1; q[W6I9
if (queue[j]>queue[k]) Khi;2{`
break; 6E K<9M
SortUtil.swap(queue,j,k); 5,##p"O(
k = j; -dO8Uis$
} q4w]9b/
} p+|8(w9A${
Z!~_#_Ugl
} ;$zvm`|:
.Z'NH wCy
} \wsVO"/
2wB*c9~
SortUtil： %L-qAI&V
p7-\a1P3
package org.rut.util.algorithm; FXDB> }8
hZ452W
import org.rut.util.algorithm.support.BubbleSort; K$,<<hl
import org.rut.util.algorithm.support.HeapSort; mz%l4w?'
import org.rut.util.algorithm.support.ImprovedMergeSort; }q]*aADe
import org.rut.util.algorithm.support.ImprovedQuickSort; }A@:JR+|
import org.rut.util.algorithm.support.InsertSort; W)bSLD
import org.rut.util.algorithm.support.MergeSort; j3;W-c`5
import org.rut.util.algorithm.support.QuickSort; &U?4e'N)T
import org.rut.util.algorithm.support.SelectionSort; Z8FgxR
import org.rut.util.algorithm.support.ShellSort; <!FcQVH+L
>AX_"Q~
/** ZCj1Cz]"l<
* @author treeroot SyI~iW#Y1
* @since 2006-2-2 9v`sSTlSd
* @version 1.0 Q"~%T@e
*/ oF>`>
public class SortUtil { O2ktqAWx@
public final static int INSERT = 1; HM0&%
public final static int BUBBLE = 2; Q"u2<
public final static int SELECTION = 3; yOQae m^O
public final static int SHELL = 4; n@ba>m4{
public final static int QUICK = 5; F7O*%y.';
public final static int IMPROVED_QUICK = 6; FCEmg0qdjD
public final static int MERGE = 7; LH_H yP_
public final static int IMPROVED_MERGE = 8; r'#!w3*Cy
public final static int HEAP = 9; /"st sF
rZpsC}C'
public static void sort(int[] data) { }=R0AKz!Cv
sort(data, IMPROVED_QUICK); Mz(?_7
} n.8870.BW
private static String[] name={ f!yl&ulKU
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ~K#92
}; )#M$ov
G\MeJSt*
private static Sort[] impl=new Sort[]{ //|B?4kk
new InsertSort(), \ [OB.
new BubbleSort(), lMu9Dp
new SelectionSort(), ~<<32t'S:
new ShellSort(), N atC}k
new QuickSort(), 4(P<'FK $
new ImprovedQuickSort(), ~A5NseWCK
new MergeSort(), 1)h<)
new ImprovedMergeSort(), z(Uz<*h8
new HeapSort() /cx'(AT
}; nTo?~=b
`3ha~+Goo!
public static String toString(int algorithm){ AEnkx!o
return name[algorithm-1]; ]!sCWR
} u(8{5"C
;}f {o^]'
public static void sort(int[] data, int algorithm) { 7K.],eo0
impl[algorithm-1].sort(data); h>*3i#
} Hs8JJGXWB
mD% qDKI
public static interface Sort { H'udxPF
public void sort(int[] data); >f Hu
} --"5yGOL
P3W3+pwq
public static void swap(int[] data, int i, int j) { 6(7{|iY
int temp = data; &L?]w=*
data = data[j]; J5jI/P
data[j] = temp; Tf!6N<dRXR
} cE`qfz
} eQ)*jeD