[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; t$Irr*
} B>a`mFM
int i1=l; .7E-
int i2=mid+1; >{Lfrc1
for(int cur=l;cur<=r;cur++){ sY1@ch"
if(i1==mid+1) ;M4N=G Wd4
data[cur]=temp[i2++]; y^M'&@F
else if(i2>r) 0FTiTrTn
data[cur]=temp[i1++]; y~ ^>my7G
else if(temp[i1] data[cur]=temp[i1++]; VFA1p)n
else s/Q}fW$ex
data[cur]=temp[i2++]; >2$Ehw:K^
} [HQ17
} y<3v/,Y
G/<{:R"
} /:awPYGH<1
iP'}eQn]c
改进后的归并排序: {fIH9+v
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package org.rut.util.algorithm.support; ~}4H=[Zu
aoF>{Z4&B
import org.rut.util.algorithm.SortUtil; 8Bhot,u'T
s8eiq`6\H}
/** 36Wuc@<H
* @author treeroot F)DL/';
* @since 2006-2-2 @J" }~Y
* @version 1.0 UxzwgVT
*/ #Kn7 xn[
public class ImprovedMergeSort implements SortUtil.Sort { bmT J
)#*c|.
private static final int THRESHOLD = 10; H~Q UN
"lN<v=
/* :VLuI
* (non-Javadoc) rD$7;
* mjs*Z{_F^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) iCv &<C@
*/ 66Hu<3X P
public void sort(int[] data) { >|z=-hqPK
int[] temp=new int[data.length]; #/1A:ig
mergeSort(data,temp,0,data.length-1); pR\etXeLd
} \I'A:~b)L
#+ n &
private void mergeSort(int[] data, int[] temp, int l, int r) { }$AC0
int i, j, k; X4%*&L
int mid = (l + r) / 2; ;y5cs;s
if (l == r) I X\&lV
return; ?>lmLz!e
if ((mid - l) >= THRESHOLD) `I m;@_J
mergeSort(data, temp, l, mid); <;U"D.'
else cpE&Fba}"
insertSort(data, l, mid - l + 1); wQ[2yq
if ((r - mid) > THRESHOLD) !lu$WJ{M
mergeSort(data, temp, mid + 1, r); Z|wZyt$$
else *+@/:$|U
insertSort(data, mid + 1, r - mid); WWE?U-o
vO4 &ZQ>6
for (i = l; i <= mid; i++) { kO2im+y
temp = data; WQ"ZQ
} #NL1N_B
for (j = 1; j <= r - mid; j++) { EidIi"sr
temp[r - j + 1] = data[j + mid]; DlIfr6F
} Pu axS
int a = temp[l]; _f34p:B%s
int b = temp[r]; |ZRl.C/e
for (i = l, j = r, k = l; k <= r; k++) { hj4A&`2
if (a < b) { 9lA YCsX
data[k] = temp[i++]; ?hDEFW9&^x
a = temp; Ud{-H_m+
} else { luC',QJB
data[k] = temp[j--]; 8,kbGlSD
b = temp[j]; 7g&_`(
} OQ[>s(`*{
} (<%i8xu2
} SAo"+%
Y{p *$
/** AA05wpu8
* @param data ~r=TVHjqi
* @param l |: nuT$(
* @param i :;??!V
*/ >Zmpsa+
private void insertSort(int[] data, int start, int len) { 1 !\pwd@{
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); UdLC]
} G.oaDGy
} E,C<ox4e
} eMh:T@SN
} cwpDad[Kx
5~.\rcr%
堆排序： *]Vx=7D
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package org.rut.util.algorithm.support; Ke'bH
C2Y&qX,
import org.rut.util.algorithm.SortUtil; Wm3H6o*
EB> RY+\
/** MuO>O97
* @author treeroot q2/Vt0aYx
* @since 2006-2-2 ^5;Y
* @version 1.0 u\t ;
*/ C($`'~b
public class HeapSort implements SortUtil.Sort{ wbr"z7}
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/* (non-Javadoc) /H3,v8J@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9qqEr~
*/ jpBE| Nm
public void sort(int[] data) { 4|:{apH
MaxHeap h=new MaxHeap(); 8-SVgo(
h.init(data); 9)4N2=
for(int i=0;i h.remove(); b]Z@zS<8
System.arraycopy(h.queue,1,data,0,data.length); uHf~KYL
} aMz%H|/$
{s`1+6_&Vz
private static class MaxHeap{ @cjhri|vH
*`l>1)B>
void init(int[] data){ &Vonu*
this.queue=new int[data.length+1]; {b#c0>.8-
for(int i=0;i queue[++size]=data; 8^4X/n
fixUp(size); jN*A"m
} (U7%Z<
} h_A}i2/{
LRbevpZ,
private int size=0; 2%@j<yS
uF^+}Y ZT
private int[] queue; Cch1"j<k$
sV77WF
public int get() { XhIgzaGVu
return queue[1]; ^ePSI|EW
} 0kiW629o
Rw. Uz&
public void remove() { L)w& f
SortUtil.swap(queue,1,size--); ~F' $p
fixDown(1); \!YPht
} nFB;!r
file://fixdown -D(UbkPw
private void fixDown(int k) { FlkAo]
int j; J'7){C"G$
while ((j = k << 1) <= size) { Gwvs~jN
if (j < size %26amp;%26amp; queue[j] j++; c/x(v=LW
if (queue[k]>queue[j]) file://不用交换 $[|8bE
break; "0/OpT7h7
SortUtil.swap(queue,j,k); [tBIABr
k = j; tDi=T]-bt
} %9zcc)cP
} H}}t)H
private void fixUp(int k) { #Xn#e
while (k > 1) { x?j&Jn_@w
int j = k >> 1; ,g6.d#c
if (queue[j]>queue[k]) [J*)r8ys
break; AN.`tv
SortUtil.swap(queue,j,k); 2ag]p
k = j; [M;P:@
} Ot,sMRk'
} riBT5
[I^SKvM
} 'Lm.`U
}'Z(J)Bg
} UPgZj\t%{
G A7
SortUtil： VvltVYOZA
B\("08x
package org.rut.util.algorithm; dj]sr!q+
Nf;vUYP
import org.rut.util.algorithm.support.BubbleSort; TvQAy/Y0
import org.rut.util.algorithm.support.HeapSort; <"\K|2Sg
import org.rut.util.algorithm.support.ImprovedMergeSort; APLu?wy7s5
import org.rut.util.algorithm.support.ImprovedQuickSort; Qe4
import org.rut.util.algorithm.support.InsertSort; RCmPZ
import org.rut.util.algorithm.support.MergeSort; wZOO#&X#r
import org.rut.util.algorithm.support.QuickSort; 10 p+e_@
import org.rut.util.algorithm.support.SelectionSort; |]I?^:I
import org.rut.util.algorithm.support.ShellSort; Ik}*7D
!c*^:0
/** T}\U:@b
* @author treeroot &O%Kj8)
* @since 2006-2-2 ;nC+Kz:
* @version 1.0 J%[K;WjrZJ
*/ WUHx0I
public class SortUtil { c/hml4
public final static int INSERT = 1; kQH!`-n:T
public final static int BUBBLE = 2; .<j8>1
public final static int SELECTION = 3; I5bi^!i
public final static int SHELL = 4; 0CDTj,eK
public final static int QUICK = 5; t>25IJG
public final static int IMPROVED_QUICK = 6; B@s\>QMm
public final static int MERGE = 7; <&x_e-;b'
public final static int IMPROVED_MERGE = 8; QOP*vH >J
public final static int HEAP = 9; tq*Q|9j7VG
_@@S,(MA
public static void sort(int[] data) { n@%'Nbc>b
sort(data, IMPROVED_QUICK); 8l}|.Q#--
} v)pdm\P
private static String[] name={ ae^xuM?7
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" c{852R
}; Y8AU<M
%V+,#
private static Sort[] impl=new Sort[]{ k?";$C}#
new InsertSort(), -(59F
new BubbleSort(), j"NqNv
new SelectionSort(), ^|x{E20
new ShellSort(), bqe;) A7
new QuickSort(), lLg23k{'
new ImprovedQuickSort(), s@q54
new MergeSort(), zcNV<tx
new ImprovedMergeSort(), (ncfR
new HeapSort() T2Vj&EA@
}; )kd)v4#
%r>vZ/>a
public static String toString(int algorithm){ @TH \hr]
return name[algorithm-1]; M)LdGN?$
} MDB}G '
W5x]bl#
public static void sort(int[] data, int algorithm) { UGN. ]#"#
impl[algorithm-1].sort(data); jAJkCCG
} iD]!PaFD`
'kC$R;#\7
public static interface Sort { b#]in0MT?@
public void sort(int[] data); B;-oa;m:E=
} \u)(+t{
("TI~
public static void swap(int[] data, int i, int j) { |FNP~5v
int temp = data; ;N j5NB7
data = data[j]; 2+^#<Uok
data[j] = temp; &=/.$i-w$
} 5(F!*6i>
} kPxEGuL'