[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; ^9f`3~!#bc
} 6XCX#4'i%
int i1=l; w\;9&;;
int i2=mid+1; *SG2k .$
for(int cur=l;cur<=r;cur++){ ?g#t3j>zoF
if(i1==mid+1) bFxJ|
data[cur]=temp[i2++]; ex!wY
else if(i2>r) Gy7x?
data[cur]=temp[i1++]; adPU)k_j:
else if(temp[i1] data[cur]=temp[i1++]; Lj* =*V
else X^ ]$/rI)
data[cur]=temp[i2++]; <hC3#dNRd
} 8PVs!?Nne
} _eeX]xSSl
v2=!*
} [?6D1b[
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改进后的归并排序: YhK/pt43C
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package org.rut.util.algorithm.support; UNLNY,P/!)
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import org.rut.util.algorithm.SortUtil; v5ddb)
JkDZl?x5
/** 'Mhdw}
* @author treeroot tSLl'XeN
* @since 2006-2-2 V>j`
* @version 1.0 f9=X7"dzP
*/ &fhurzzAm
public class ImprovedMergeSort implements SortUtil.Sort { ]8nm9qmF<
?(UXK hs
private static final int THRESHOLD = 10; !td.ks0
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/* / H/Ne )r
* (non-Javadoc) =QO[zke:
* fv'P!+)t
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) b'"%
*/ 0c6AQP"=V
public void sort(int[] data) { -t#a*?"$w
int[] temp=new int[data.length]; o5@P>\u>
mergeSort(data,temp,0,data.length-1); 5!{g6=(
} vszAr( t
3t6'5{
private void mergeSort(int[] data, int[] temp, int l, int r) { eL4@% ]o
int i, j, k; #{cpG2Rs
int mid = (l + r) / 2; yj9gN}+
if (l == r) PY<V
return; Y[]t_o)
if ((mid - l) >= THRESHOLD) {NqGWkGt*b
mergeSort(data, temp, l, mid); w:@M|O4`
else <:t\P.
insertSort(data, l, mid - l + 1); +ANIm^@
if ((r - mid) > THRESHOLD) S.>9tV2Ca
mergeSort(data, temp, mid + 1, r); +-137!x\q
else A0sW 9P6F
insertSort(data, mid + 1, r - mid); B y8Tw;aL
FLOJ
for (i = l; i <= mid; i++) { F=c_PQO
temp = data; u;1NhD<n
} f^)nZ:~
for (j = 1; j <= r - mid; j++) { xF31%b`z:
temp[r - j + 1] = data[j + mid]; 'J2P3t
} 3goJ(XI
int a = temp[l]; _j tS-CnO
int b = temp[r]; aJ@qB9(ZBe
for (i = l, j = r, k = l; k <= r; k++) { ]}c=U@D,9
if (a < b) { . M$D
data[k] = temp[i++]; a{.n(M
a = temp; pD/S\E0@t
} else { 9}_f\Bs
data[k] = temp[j--]; DYl{{L8@
b = temp[j]; `Pbn
} >p:fWQ6
} O:R{4Q*5
} $QnfpM%+=
0P >dXd)T
/** yln.E vJjD
* @param data |{"7/~*[
* @param l !A0bbJ
* @param i h:90K
*/ ir?9{t/()
private void insertSort(int[] data, int start, int len) { Ip-jqN J~
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); }H.vH
} cv1L!Ce,
} w;_=$L'H&G
} 7NEn+OI4
} AV! cCQ
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堆排序： +y(h/NcQ
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package org.rut.util.algorithm.support; g/gLG:C
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import org.rut.util.algorithm.SortUtil; =0Sa
~`.%n7
/** |XZf:}q5:
* @author treeroot [%Xfl7;Wh
* @since 2006-2-2 9$i`B>C~
* @version 1.0 ;& +75n
*/ ?^p8]Va%
public class HeapSort implements SortUtil.Sort{ D._r@~o
T]`" Xl8
/* (non-Javadoc) SO"P3X
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1)ne-e
*/ #Xly5J
public void sort(int[] data) { iDJ2dM}v
MaxHeap h=new MaxHeap(); sJ=B:3jS0
h.init(data); {D< ?.'
for(int i=0;i h.remove(); #n r1- sf|
System.arraycopy(h.queue,1,data,0,data.length); M$9h)3(B
} y0]O 6.{
sqRuqUj+
private static class MaxHeap{ Vo[4\h#$
,Nh X%
void init(int[] data){ RPwSo.c4
this.queue=new int[data.length+1]; Cv33?l-8%_
for(int i=0;i queue[++size]=data; *^()el,d
fixUp(size); 4+"SG@i`W
} $la,_Sr
} Y.J$f<[R
gX<C-y6o
private int size=0; C? S%fF
*1Q?~
private int[] queue; GYO"1PM
9:s!#FYFM
public int get() { ;{RQ+ZX'[
return queue[1]; db|$7]!w
} IZLX[y
O8%/Id
public void remove() { r9[J3t*({~
SortUtil.swap(queue,1,size--); g;T`~
fixDown(1); pz+#1=b]
} ?*=Jq
file://fixdown 5B6:pH6e
private void fixDown(int k) { (B5G?cB9
int j; L\I/2aiE
while ((j = k << 1) <= size) { ~MF. M8
if (j < size %26amp;%26amp; queue[j] j++; 4<|]k?@
if (queue[k]>queue[j]) file://不用交换 "^`AS"z'
break; m{|n.b
SortUtil.swap(queue,j,k); R}FN6cH
k = j; X*@Sj;|m
} ; V8 =B8w
} t)h3GM
private void fixUp(int k) { X@rAe37h+
while (k > 1) { RWYA`
int j = k >> 1; ="4)!
if (queue[j]>queue[k]) NT0q!r/!
break; 3;AAC (X
SortUtil.swap(queue,j,k); e!#:h4I
k = j; wuCODz@~
} t [f]
} #"l=Lv
%|Vq"MW,I
} 1ARIZ;H
^Ue>T8
} ?uQpt(
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SortUtil： A]1](VQ)4
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package org.rut.util.algorithm; udMq>s;
~9=g"v
import org.rut.util.algorithm.support.BubbleSort; qmhHHFjQ
import org.rut.util.algorithm.support.HeapSort; =x>KA*O1
import org.rut.util.algorithm.support.ImprovedMergeSort; MFrVGEQBRL
import org.rut.util.algorithm.support.ImprovedQuickSort; L,$9)`j
import org.rut.util.algorithm.support.InsertSort; 4?`7XJ0a
import org.rut.util.algorithm.support.MergeSort; P:G^@B3^
import org.rut.util.algorithm.support.QuickSort; CKK8 o9W
import org.rut.util.algorithm.support.SelectionSort; Y&nY]VV
import org.rut.util.algorithm.support.ShellSort; :|bPr_&U$
{>#Ya;E
/** YRFM1?*
* @author treeroot _ ._'\
* @since 2006-2-2 e([}dz
* @version 1.0 Ad[-YT
*/ xpae0vw
public class SortUtil { [1Rs~T"
public final static int INSERT = 1; ]*).3<Lw
public final static int BUBBLE = 2; #H|]F86(
public final static int SELECTION = 3; 8WMC ~
public final static int SHELL = 4; +u7mw<A 8
public final static int QUICK = 5; dXZV1e1b&#
public final static int IMPROVED_QUICK = 6; YIfbcR5
public final static int MERGE = 7; ]'{<O3:7
public final static int IMPROVED_MERGE = 8; z,vjY$t:/
public final static int HEAP = 9; +]G;_/[2
?(Nls.c
public static void sort(int[] data) { cOcm9m#
sort(data, IMPROVED_QUICK); 5=eGiF;0\
} Q/':<QY
private static String[] name={ :EZTJu
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ne%ckW?ks
}; Gmc0yRN
/J^yOR9
private static Sort[] impl=new Sort[]{ O3S_P]{*ny
new InsertSort(), |#k1a:
new BubbleSort(), <Fi/!
new SelectionSort(), =4G9ev 4
new ShellSort(), Hc71 .rqS
new QuickSort(), krgsmDi7
new ImprovedQuickSort(), _15r!RZ:1
new MergeSort(), :2La,
new ImprovedMergeSort(), I_Q'+d
new HeapSort() >Py=H+d!j
}; UPH:$Fk&
n<MH\.!tM
public static String toString(int algorithm){ Xr-eDUEi
return name[algorithm-1]; "[76>\'H
} >k"/:g^t
Zx@{nVoYe~
public static void sort(int[] data, int algorithm) { EI'(
impl[algorithm-1].sort(data); N/(&&\3
} OX!9T.j
QM OOJA
public static interface Sort { p tMysYT'
public void sort(int[] data); tR1 kn&w
} N]gdS]pP2{
ip~PF5
public static void swap(int[] data, int i, int j) { ^b'[81%
int temp = data; A>Js`s
data = data[j]; C]82Mt
data[j] = temp; Jjv, )@yo
} 9M<{@<]dm
} d+$a5 [^9