[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; V<:kS
} HR.S.(t[_
int i1=l; +qD4`aI
int i2=mid+1; o PR^Z pt
for(int cur=l;cur<=r;cur++){ H8Pil H
if(i1==mid+1) rAn''X6H
data[cur]=temp[i2++]; r_FW)Fu^
else if(i2>r) 9]1-J5iO
data[cur]=temp[i1++]; wb"Jj
else if(temp[i1] data[cur]=temp[i1++]; fG0rUi(8
else T>kJB.V:oQ
data[cur]=temp[i2++]; W_O,Kao
} &,{cm^*
} *ZKfyn$+~
&p=|z2 J
} O 4l[4,`
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改进后的归并排序: =WJ*$j(
:9_K@f?n
package org.rut.util.algorithm.support; 1p+2*c
- Kj$A@~x
import org.rut.util.algorithm.SortUtil; ,UH`l./3DX
o=w&&B
/** B%^B_s
* @author treeroot <4rF3 aB-
* @since 2006-2-2 ;G;vpl
* @version 1.0 e9k}n\t3
*/ 2ZNTg@o
public class ImprovedMergeSort implements SortUtil.Sort { 0(@8
g#9KG
private static final int THRESHOLD = 10; /<zBcpVNV
Ju)2J?Xs5
/* Il~ph9{JH
* (non-Javadoc) 9)aXLM4Y
* 0-l @U{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) uAK-%Uu?
*/ 6H.D`"cj
public void sort(int[] data) { X<,sc;"b`k
int[] temp=new int[data.length]; OHp 121
mergeSort(data,temp,0,data.length-1); ra_`NsKF}
} ^0~?3t5
UMx>n18;f9
private void mergeSort(int[] data, int[] temp, int l, int r) { 'n)M0e
int i, j, k; <3Co/.VQd
int mid = (l + r) / 2; Uu }ai."iB
if (l == r) w/h?, L|
return; } Yjic4?
if ((mid - l) >= THRESHOLD) xJ^Gtq Um
mergeSort(data, temp, l, mid); SobK<6
else Fg5>CppH
insertSort(data, l, mid - l + 1); {B\ar+9>
if ((r - mid) > THRESHOLD) )q&uvfQ1(
mergeSort(data, temp, mid + 1, r); 4q~+K'Z
else Ct$e`H!;
insertSort(data, mid + 1, r - mid); QOy+T6en
DH)@8)C
for (i = l; i <= mid; i++) { niqiDT/
temp = data; D-E30b]e
} _2}i8q:
for (j = 1; j <= r - mid; j++) { &wK%p/?
temp[r - j + 1] = data[j + mid]; CIj3D"
} 1 /7H` O?
int a = temp[l]; [M Z'i/
int b = temp[r]; IUbYw~f3
for (i = l, j = r, k = l; k <= r; k++) { 2[qO;js
if (a < b) { X/2Xr(z"k
data[k] = temp[i++]; {xr4CDP
a = temp; LPO3B W
} else { uDQ d48>
data[k] = temp[j--]; uJF,:}qA
b = temp[j]; HMrS::
} _4xX}Z;
} Tx`;y|
} "eZNci
9_5Fl,u z
/** Tj<W4+p{
* @param data Ko>pwhR}
* @param l {p yo
* @param i $@}6P,mg
*/ |a3)U%rUEQ
private void insertSort(int[] data, int start, int len) { )z2Tm4>iql
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); \96?OCdr
} D0lgKQ
} ]\sBl
} h&NcN-["
} wrac\.
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堆排序： I/pavh
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package org.rut.util.algorithm.support; na(@`(j[
bn~=d@'
import org.rut.util.algorithm.SortUtil; 6_^u}me
m`I6gnLj
/** z<sf}6q
* @author treeroot 2Z\6xb|u
* @since 2006-2-2 aOyAP-m,
* @version 1.0 -81usu&NH
*/ O292JA
public class HeapSort implements SortUtil.Sort{ V78QV3
O}Fp\"
/* (non-Javadoc) Nt$/JBB[$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4g$mz:vo
*/ 4WzB=C(f
public void sort(int[] data) { )+u|qT3%
MaxHeap h=new MaxHeap(); CmY'[rI
h.init(data); Gv?'R0s
for(int i=0;i h.remove(); " F~uTo
System.arraycopy(h.queue,1,data,0,data.length); C.}Z5BwS
} ZiSy&r:(
kQsyvE
private static class MaxHeap{ dAm(uJ
~Q0jz/#c
void init(int[] data){ 6f\0YU<C&
this.queue=new int[data.length+1]; CJ {?9z@$.
for(int i=0;i queue[++size]=data; :PY~Cws
fixUp(size); 9"I/jd0B
} eH(8T
} C-@@`EP
6wqq"6w
private int size=0; b U-Cd
\3O#H
private int[] queue; =V/$&96Q
: \:jIP
public int get() { O<)"kj 7
return queue[1]; Z>wg o@z%
} <6Y o%xt
ppM d
public void remove() { 4 "@BbVYR
SortUtil.swap(queue,1,size--); .%M=dL>
fixDown(1); %)i?\(/
} p*-o33Ve
file://fixdown T,TKt%
private void fixDown(int k) { r[Qk-}@vp
int j; 13'tsM&
while ((j = k << 1) <= size) { kbI:}b7H
if (j < size %26amp;%26amp; queue[j] j++; n-#?6`>a
if (queue[k]>queue[j]) file://不用交换 gk>A
break; ALiA+k N
SortUtil.swap(queue,j,k); "F7g8vu
k = j; S5-}u)XnH
} AVZ-g/<
} _`+ !,kG[
private void fixUp(int k) { g%4-QCZ,
while (k > 1) { K9mL1[B
int j = k >> 1; V2^(qpM!
if (queue[j]>queue[k]) {I@@i8)]
break; yCf*ts1
SortUtil.swap(queue,j,k); Vx~[;*{,C9
k = j; #?@k=e\
} ZcYxH|Gn
} i jg'X#E
$83TA><a
} bO>Mvf
3R !Mfz*
} V/.Y]dN5
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SortUtil： S@k4k^Vg
@-NdgM<
package org.rut.util.algorithm; |4\.",Bg
>/.-N
import org.rut.util.algorithm.support.BubbleSort; =4RnXZ[P0
import org.rut.util.algorithm.support.HeapSort; )U6T]1
import org.rut.util.algorithm.support.ImprovedMergeSort; $"!"=v%B
import org.rut.util.algorithm.support.ImprovedQuickSort; *S~gF/*kP
import org.rut.util.algorithm.support.InsertSort; W=M]1hy
import org.rut.util.algorithm.support.MergeSort; CKNC"Y*X
import org.rut.util.algorithm.support.QuickSort; )|x)KY
import org.rut.util.algorithm.support.SelectionSort; &y;('w
import org.rut.util.algorithm.support.ShellSort; '{5|[
Be68 Fu0
/** RnE=T/VZJ
* @author treeroot xx)egy_
* @since 2006-2-2 D^E1
* @version 1.0 /(bPc12
*/ pUZbZ U
public class SortUtil { ssoIC
public final static int INSERT = 1; ]uI#4t~
public final static int BUBBLE = 2; W~$YKBW
public final static int SELECTION = 3; V)mRG`L
public final static int SHELL = 4; (%rO'X
public final static int QUICK = 5; qSlC@@.>
public final static int IMPROVED_QUICK = 6; [>A%%
public final static int MERGE = 7; 6#MIt:#
public final static int IMPROVED_MERGE = 8; !_QE|tVeR
public final static int HEAP = 9; .RxH-]xk
V2W)%c'
public static void sort(int[] data) { I0h/x5
sort(data, IMPROVED_QUICK); XkHO=
} \S{ise/U
private static String[] name={ U]riBlg>
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" fil'._
}; wN-3@
gI~Ru8
private static Sort[] impl=new Sort[]{ (|(#~o]40t
new InsertSort(), _Jn-#du
new BubbleSort(), T\eOrWt/
new SelectionSort(), >V2Tr$m j
new ShellSort(), +/'3=!oyd
new QuickSort(), UiqHUrx
new ImprovedQuickSort(), Z 7rVM
new MergeSort(), C:\BvPoO
new ImprovedMergeSort(), ~e~iCyW;S
new HeapSort() byR|L:L
}; 4eMNKIsvY$
9+)5#!0
public static String toString(int algorithm){ &> tmzlww
return name[algorithm-1]; 8 ;y N
} +Em+W#i%?
vn}:$|r$J
public static void sort(int[] data, int algorithm) { l`G .lM(
impl[algorithm-1].sort(data); 7E*d>:5I
} ujGvrYj
81u}J9z;
public static interface Sort { :@a8>i1&
public void sort(int[] data); hg_@Ui@[z
} 9!6sf GZ
;i\m:8!;
public static void swap(int[] data, int i, int j) { "q5Tw+KCfu
int temp = data; WI/&r5rq
data = data[j]; ?B3
data[j] = temp; `?+lM
} (%=[J/F/
} oswS<t{Z