[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; BEQ$p) h
} 8sDbvVh1F
int i1=l; 23lLoyN
int i2=mid+1; x}g5
for(int cur=l;cur<=r;cur++){ ECO4ut.d
if(i1==mid+1) F/"Q0%(m
data[cur]=temp[i2++]; "Ih>>|r
else if(i2>r) V)$y
data[cur]=temp[i1++]; NZJ:@J=-
else if(temp[i1] data[cur]=temp[i1++]; jm-J_o;}z6
else QFP3S(
data[cur]=temp[i2++]; c]#+W@$
} `5[$8;
} B?Vr9H7n
S~dD;R
} fpjy[$8
#Ub"Ii
改进后的归并排序: 6m.ChlO/
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package org.rut.util.algorithm.support; Zu4|1W
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import org.rut.util.algorithm.SortUtil; F{:ZHCm
pjC2jlwm*
/** b7 pD#v
* @author treeroot X5@SLkJ-`
* @since 2006-2-2 >-2eZ(n)"
* @version 1.0 e}x}Fj</(
*/ *K9I+t"g
public class ImprovedMergeSort implements SortUtil.Sort { dLtSa\2Hn
+E8Itb,
private static final int THRESHOLD = 10; 4"OUmh9LHB
E+Jh4$x{
/* 4G:I VK9
* (non-Javadoc) ~?V+^<P
* ?_\t7f
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >^1|Mg/!>
*/ hSxlj7Eo^T
public void sort(int[] data) { R W=<EF&
int[] temp=new int[data.length]; 6GxQ<
mergeSort(data,temp,0,data.length-1); y$n7'W6
} \m.ap+dFa
ISQC{K']J
private void mergeSort(int[] data, int[] temp, int l, int r) { Cm~h\+"
int i, j, k; \9U4V>p
int mid = (l + r) / 2; b#**`Y
if (l == r) =h?Q.vad
return; .Z,3:3,]
if ((mid - l) >= THRESHOLD) 5yvaY "B
mergeSort(data, temp, l, mid); FmfPi .;1
else 2?",2x09
insertSort(data, l, mid - l + 1); 5ryzAB O\2
if ((r - mid) > THRESHOLD) }pE8G#O&
mergeSort(data, temp, mid + 1, r); \htL\m^$9
else K!X>k
insertSort(data, mid + 1, r - mid); rAc Yt9M#
sU {'
for (i = l; i <= mid; i++) { %5N;SRtv
temp = data; @WppiZ$
} R&z)
for (j = 1; j <= r - mid; j++) { qz|`\^
temp[r - j + 1] = data[j + mid]; )+^1QL
} .g CC$
int a = temp[l]; x^UE4$oo
int b = temp[r]; E$$pO.\
for (i = l, j = r, k = l; k <= r; k++) { Mo+mO&B
if (a < b) { NDG3mCl
data[k] = temp[i++]; tMN^"sjf*
a = temp; ~, hPi
} else { 0D[D;MW
data[k] = temp[j--]; $rB20!
b = temp[j]; |E\0Rv{H3
} aZ$$a+
} 3pxm0|
} sZ,MNF8i
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/** LPjsR=xi
* @param data DVu_KT[Hd
* @param l +O<0q"E
* @param i ~R`Rj*Q2Y
*/ GP"(+5
private void insertSort(int[] data, int start, int len) { 7g-#v'.N
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); pRsYA7Ti
} <Sxsmf0"
} >".,=u'
} ]J^9iDTTA
} .s4hFB^n
U] 2fV|Hn
堆排序： 9aLS%-x!+
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package org.rut.util.algorithm.support; N-x~\B!
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import org.rut.util.algorithm.SortUtil; )I80Nq
#A8d@]Ps
/** Cdjh/+!f
* @author treeroot fvajNP
* @since 2006-2-2 V?g@pnN"
* @version 1.0 >Z#=<
*/ `aFy2x`3
public class HeapSort implements SortUtil.Sort{ <1(:W[M
j@c fR
/* (non-Javadoc) M@a?j<7P,m
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) zu<8%
*/ 1Aq*|JSk(
public void sort(int[] data) { )7mX]@
MaxHeap h=new MaxHeap(); y(pHt
h.init(data); r7tN(2;5
for(int i=0;i h.remove(); SrV+Ox
System.arraycopy(h.queue,1,data,0,data.length); ;H#'9p,2
} lFWN[`H
P)fv:a
private static class MaxHeap{ b\zRwp
>uN`q1?l'
void init(int[] data){ &a?&G'?
this.queue=new int[data.length+1]; &"dT/5}6
for(int i=0;i queue[++size]=data; KKm0@Y
fixUp(size); CroI,=a&,
} gf]biE"k
} !GkwbHr+p
<!.'"*2
private int size=0; -b>"2B?
k^q}F%UV
private int[] queue; bl|k6{A
z/*nY?
public int get() { Si<9Oh
return queue[1]; ^7`"wj14
} 0_HdjK
2e}${NZN
public void remove() { -GkNA"2M[
SortUtil.swap(queue,1,size--); ~L!*p0dS^
fixDown(1); 7@g8nv(p
} ,63hO.4M
file://fixdown i/rdPbq
private void fixDown(int k) { IxT[1$e
int j; ; Xy\7tx
while ((j = k << 1) <= size) { uLYz!E+E
if (j < size %26amp;%26amp; queue[j] j++; e{edI{g
if (queue[k]>queue[j]) file://不用交换 W1X\!Y
break; `nccRy<l
SortUtil.swap(queue,j,k); a^qLyF&F
k = j; \Q"o\:IoIT
} [>"bL$tlo*
} 6JWCB9$4
private void fixUp(int k) { k%\_UYa
while (k > 1) { **rA/*Oc
int j = k >> 1; `"v5bk
if (queue[j]>queue[k]) .BGM1ph}~
break; @;}bBHQz{p
SortUtil.swap(queue,j,k); ^(I4Do~}
k = j; mrDIt4$D
} P&3'N~k-
} 96aA2s1
:>to?~Z1
} &6A'}9Ch
yH>`Kbf T
} i<|5~tm
@psyO]D=j%
SortUtil： [B9'/:
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package org.rut.util.algorithm; 0bxB@(NO
3X$)cZQ
import org.rut.util.algorithm.support.BubbleSort; .$+]N[-=
import org.rut.util.algorithm.support.HeapSort; ZCi~4&Z#
import org.rut.util.algorithm.support.ImprovedMergeSort; I]P'wav~O
import org.rut.util.algorithm.support.ImprovedQuickSort; E6n3[Z
import org.rut.util.algorithm.support.InsertSort; kVs'>H@FY
import org.rut.util.algorithm.support.MergeSort; =>Y b~r71
import org.rut.util.algorithm.support.QuickSort; &LE,.Q34
import org.rut.util.algorithm.support.SelectionSort; ^yUel.N5"
import org.rut.util.algorithm.support.ShellSort; l%*KBME
PL/as3O^A
/** .Gv9RKgd~
* @author treeroot E"5 zT1d
* @since 2006-2-2 #q1Qa_LXc
* @version 1.0 U'S}7gya
*/ ]Q=D'1MM
public class SortUtil { k"|4 LPv[
public final static int INSERT = 1; '3Yci(t+
public final static int BUBBLE = 2; FjIS:9^)t5
public final static int SELECTION = 3; gK/mm\K@
public final static int SHELL = 4; D<$~bUkxR
public final static int QUICK = 5; <A&mc,kj
public final static int IMPROVED_QUICK = 6; i"%X[(U7
public final static int MERGE = 7; /_E8'qlx
public final static int IMPROVED_MERGE = 8; LZm6\x
public final static int HEAP = 9; @sJ[<V
Pw/Z;N;:V
public static void sort(int[] data) { +MPM^m
sort(data, IMPROVED_QUICK); zVe@`gc
} W HO;;j
private static String[] name={ }l&Uh&B`
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Vh^fbv`?
}; J&}/Xw)
)n 1b
private static Sort[] impl=new Sort[]{ Ddde,WJA
new InsertSort(), ~H/|J^ J
new BubbleSort(), yiGq?WA7
new SelectionSort(), naCPSsei
new ShellSort(), 2bxkZS]
new QuickSort(), 'EJ8)2
new ImprovedQuickSort(), O[f*!
new MergeSort(), Ed,`1+
new ImprovedMergeSort(), zu&5[XL
new HeapSort() (Da/$S.
}; / <WB%O
\|nF55W [
public static String toString(int algorithm){ 1"3|6&=
return name[algorithm-1]; ^RytBwzKM
} Rk.YnA_J6
o^;$-O!/
public static void sort(int[] data, int algorithm) { 6H67$?jMyJ
impl[algorithm-1].sort(data); <jF]SN
} cc7*O
^D\1F$AjC
public static interface Sort { xc[@lr
public void sort(int[] data); YLVV9(
} ]&\HAmOQS
4k_&Q?1
public static void swap(int[] data, int i, int j) { zQ9"i
int temp = data; $j:$ `
data = data[j]; $u_0"sUV
data[j] = temp; Qk<W(
} 3}=r.\]U
} :S}!i?n