[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$Z
} L/^I*p,
int i1=l; ?z u8)U
int i2=mid+1; >o,TZc\
for(int cur=l;cur<=r;cur++){ E4xa[iZ
if(i1==mid+1) !f6(Zho
data[cur]=temp[i2++]; LreP4dRe
else if(i2>r) Y nZiTe@
data[cur]=temp[i1++]; /u+e0BHo
else if(temp[i1] data[cur]=temp[i1++]; n'w.; q
else PFK '$
data[cur]=temp[i2++]; WuW^GC{7
} ;*&-C9b
} Yz<1 wt7;
@s^-.z
} RpYERAgT
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改进后的归并排序: )\^-2[;
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package org.rut.util.algorithm.support; ~u+9J}
5/z/>D;
import org.rut.util.algorithm.SortUtil; =nHgDrA_
gPc=2
/** t&DEb_"De
* @author treeroot jF*j0PkNdb
* @since 2006-2-2 29q _BR *:
* @version 1.0 ~F7gP{r
*/ iG?[<1~
public class ImprovedMergeSort implements SortUtil.Sort { C"enpc_C/
4xJQ!>6
private static final int THRESHOLD = 10; >yh2Lri
Y[S1$(K&*
/* >@AB<$A
* (non-Javadoc) RCLeA=/N@0
* ~^b/(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) u>/ TE
*/ \5cpFj5%
public void sort(int[] data) { g$o&Udgs
int[] temp=new int[data.length]; ;6hOx(>`=
mergeSort(data,temp,0,data.length-1); xAP+FWyV
} (_{yB[z>`
4nz35BLr
private void mergeSort(int[] data, int[] temp, int l, int r) { C2)2)
int i, j, k; YT8F#t8
int mid = (l + r) / 2; dnuu&Rv
if (l == r) ua `RJ
return; NW)1#]gg%
if ((mid - l) >= THRESHOLD) H7+,*
mergeSort(data, temp, l, mid); & "B=/-(
else ^y4Z+Gu[
insertSort(data, l, mid - l + 1); /|&*QLy
if ((r - mid) > THRESHOLD) .XhrCiZ
mergeSort(data, temp, mid + 1, r); :P=(k2
else Ld-_,-n
insertSort(data, mid + 1, r - mid); IdxzE_@
W'TaBuCb
for (i = l; i <= mid; i++) { <_KIK
temp = data; xi;`ecqS<
} RY*U"G0#w
for (j = 1; j <= r - mid; j++) { $,fX:x
temp[r - j + 1] = data[j + mid]; EDs\,f}
} _t}WsEQ+P
int a = temp[l]; B48={
int b = temp[r]; $ o#V#
for (i = l, j = r, k = l; k <= r; k++) { 8SS|a
if (a < b) { h3@v+Z<}
data[k] = temp[i++]; HiJE}V;Vq
a = temp; P}`H ~N~
} else { B^jc3 VsR
data[k] = temp[j--]; fa2kG&, _
b = temp[j]; S`m]f5u|
} U|j`e5)
} "8zDbdK
} ^L&iR0
, SnSW-P
/** G;XxBA
* @param data _2 osV[e
* @param l 5d!-G$@
* @param i yJe>JK~)
*/ u08mqEa
private void insertSort(int[] data, int start, int len) { qA5r
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); t.\dpBq
} i<g-+Qs
} %BB%pC
} ^D-/`d
} w917N4$
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堆排序： sds"%]rg
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package org.rut.util.algorithm.support; t#eTV@-
!m?-!:
import org.rut.util.algorithm.SortUtil; d9|<@A
.Rf_Cl
/** "`1bA"E
* @author treeroot }?v )N).kW
* @since 2006-2-2 Z>#i**
* @version 1.0 2Q:+_v
*/ k~FRD?[u
public class HeapSort implements SortUtil.Sort{ _``=cc
^@NU}S):yN
/* (non-Javadoc) pIKPXqA
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,UdVNA
*/ x.R4%Z
public void sort(int[] data) { Y% 5eZ=z
MaxHeap h=new MaxHeap(); ZO$%[ftb
h.init(data); jdJ>9O0A,
for(int i=0;i h.remove(); R]*K:~DM
System.arraycopy(h.queue,1,data,0,data.length); SGlNKA},A
} KL Xq\{X
[0D.K}7|
private static class MaxHeap{ ijx0gh`~
0>Z_*U~6
void init(int[] data){ *%@h(js
this.queue=new int[data.length+1]; =+d?x56
for(int i=0;i queue[++size]=data; 2*#|Nj=^
fixUp(size); 4d;8`66O
} gEE\y{y
} "@,}p\
i@M[>~
private int size=0; rguCp}r
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private int[] queue; k7usMVAA
a-L;*
public int get() { *,WU?tl&
return queue[1]; fIv*T[
} /FEVmH?
L8#5*8W6
public void remove() { !f&g-V
SortUtil.swap(queue,1,size--); @/-\k*T
fixDown(1); "C0Q(dr/n
} b(O3@Q6[
file://fixdown y:qUn!3
private void fixDown(int k) { 7o5BXF
int j; V[vl!XM
while ((j = k << 1) <= size) { s#=7IH30
if (j < size %26amp;%26amp; queue[j] j++; m5Di=8
if (queue[k]>queue[j]) file://不用交换 ]}2ZttQ?
break; '}bgLv
SortUtil.swap(queue,j,k); ;cN{a&
k = j; >[=^_8M
} 9j:"J` '
} C#Iybg
private void fixUp(int k) { \&gB)czEO
while (k > 1) { HEc+;O1<
int j = k >> 1; XFV!S#yEZ
if (queue[j]>queue[k]) ) M BQuiL
break; JbQ) sp
SortUtil.swap(queue,j,k); 63,H{
k = j; =^50FI|
} <1\Nb{5
} *N'p~LJ
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} OMg<V
>_ 2dvg=U
} L<{i,'M
ThbGQ"/
SortUtil： zi*R`;_`,
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package org.rut.util.algorithm; .$)
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import org.rut.util.algorithm.support.BubbleSort; ,>+p-M8ZL
import org.rut.util.algorithm.support.HeapSort; WKa~[j|-K
import org.rut.util.algorithm.support.ImprovedMergeSort; R/>@+
import org.rut.util.algorithm.support.ImprovedQuickSort; PxkOT*
import org.rut.util.algorithm.support.InsertSort; GD_hhDyD
import org.rut.util.algorithm.support.MergeSort; 2{G:=U
import org.rut.util.algorithm.support.QuickSort; b |p)9&^r
import org.rut.util.algorithm.support.SelectionSort; s 15oN
import org.rut.util.algorithm.support.ShellSort; +l{=
t"'7m^j
/** LsS
* @author treeroot R2]Z kg
* @since 2006-2-2 .O}%
* @version 1.0 l u%}h7ng
*/ `W/>XZl+t
public class SortUtil { CDR@ `1-
public final static int INSERT = 1; h/hmlnOQl
public final static int BUBBLE = 2; [>5-$YOT
public final static int SELECTION = 3; $F+ LDs
public final static int SHELL = 4; ls:w8&`*
public final static int QUICK = 5; ~d*(=G
public final static int IMPROVED_QUICK = 6; p/@smke
public final static int MERGE = 7; 74k dsgQf
public final static int IMPROVED_MERGE = 8; p\aaJ
public final static int HEAP = 9; @>>~CZ`l
bsA-2*Q+
public static void sort(int[] data) { 3/W'V,5G6
sort(data, IMPROVED_QUICK); 3c6b6
} oij}'|/Jc
private static String[] name={ .qZ~_xkd
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" '|p$)yx2
}; 9b"=9y,
9=h'9Wo
private static Sort[] impl=new Sort[]{ ^)*-Bo)I
new InsertSort(), ^J)mH[
new BubbleSort(), !"/n/jz
new SelectionSort(), @wo(tf=@P
new ShellSort(), 8jo p_PG'
new QuickSort(), 90*5 5\>{
new ImprovedQuickSort(), YU5(g^<
new MergeSort(), J!pygn O
new ImprovedMergeSort(), rb+j*5Es
new HeapSort() =wOm}V8N&
}; mtmjZP(w
Y^}Z>
public static String toString(int algorithm){ 3L}!RB
return name[algorithm-1]; `q*M4,
} W~9tKT4
qjdMqoOCjl
public static void sort(int[] data, int algorithm) { v~V!ayn)wQ
impl[algorithm-1].sort(data); [)zP6\I
} A5R<p+t6
xQXXC|T
public static interface Sort { ,-d0b0
public void sort(int[] data); /-+xQn]
} ]cZ!y ~
cir$voL
public static void swap(int[] data, int i, int j) { 5aZ2j26
int temp = data; Xi,CV[L\
data = data[j]; ^c4@(]v'G
data[j] = temp; :^WKT
} BB*f4z$Y%
} ?+W9az]+