[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; LEhi/>T
} (Q'XjN\#
int i1=l; ;wN.RPE_^
int i2=mid+1; R]r~TJ o
for(int cur=l;cur<=r;cur++){ }U(^QB
if(i1==mid+1) cKxJeM07
data[cur]=temp[i2++]; -,i1T(p1
else if(i2>r) ;0BCM(>Wo
data[cur]=temp[i1++]; #A))#sT'R
else if(temp[i1] data[cur]=temp[i1++]; mj,r@@k:=+
else d3![b1
data[cur]=temp[i2++]; |MRxm"]A
} JZ<O-G+
} @vv`86bm
UtWoSFZ'o!
} -meKaQv
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改进后的归并排序: q&N&n%rbm
h?R-t*G?
package org.rut.util.algorithm.support; 6iTDk
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import org.rut.util.algorithm.SortUtil; F0|T%!FB>%
'WOWm$2
/** Ft|a/e
* @author treeroot eIEcj<f
* @since 2006-2-2 Qv?jo(]
* @version 1.0 =uvv|@Z
*/ J L Z
public class ImprovedMergeSort implements SortUtil.Sort { \Js9U|lY
=X1$K_cN
private static final int THRESHOLD = 10; $DQ -.WI
gz88$BT
/* (&x[>):6?
* (non-Javadoc) I#mT#xs6
* 7 yi>G
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *&U9npN
*/ T0SD|'
public void sort(int[] data) { Z$pR_dazU
int[] temp=new int[data.length]; Te.hXCFD
mergeSort(data,temp,0,data.length-1); <iMkHch
} {<_}[} XY
XRz.R/
private void mergeSort(int[] data, int[] temp, int l, int r) { `Yut1N
int i, j, k; p"X\]g^jA>
int mid = (l + r) / 2; 4dy)g)wM
if (l == r) :wF(([&4p!
return; }W YY5L8^
if ((mid - l) >= THRESHOLD) X%gJ,c(4
mergeSort(data, temp, l, mid); _I-0[w
else H`".L^
insertSort(data, l, mid - l + 1); sn*s7v:
if ((r - mid) > THRESHOLD) l9<+4rK2
mergeSort(data, temp, mid + 1, r); `^6}Dn
else p]>bN
insertSort(data, mid + 1, r - mid); d82IEhZ#
!",@,$
for (i = l; i <= mid; i++) { CZuxH
temp = data; YGNX+6Lz
} zxj!ihs<
for (j = 1; j <= r - mid; j++) { &,#VhT![
temp[r - j + 1] = data[j + mid]; P"%/
} [oYe/<3
int a = temp[l]; \myj Y
int b = temp[r]; N-NwGD{
for (i = l, j = r, k = l; k <= r; k++) { )HU?7n.{
if (a < b) { ~\Ynih
data[k] = temp[i++]; &B3kzs
a = temp; .f6_[cS;g
} else { SGbo|Xe7:
data[k] = temp[j--]; 3Fr}8Dy
b = temp[j]; PffwNj/l
} 4o|~KX8Qz
} $4L=Dg
} Q;Oc# u
8ZahpB
/** {1qEN_ERx
* @param data YV2^eGr.
* @param l 3NJ-.c@(p
* @param i ``O\'{o&
*/ 3$RII-}>
private void insertSort(int[] data, int start, int len) { 5= F-^
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ~L1N1Z)Kk
} p@^2.O+
} Y /wvn8~C
} jRBx7|ON
} (*2"dd
x~(Ul\EX
堆排序： 8m9G^s`[
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package org.rut.util.algorithm.support; 'fgDe
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import org.rut.util.algorithm.SortUtil; XM)|v|
,CvU#ab8$
/** 5Q^~Z},
* @author treeroot Q647a}
* @since 2006-2-2 }x8fXdd
* @version 1.0 PzF)Vg
*/ [Z[)hUXE?
public class HeapSort implements SortUtil.Sort{ 0zfrx-'zN
Le}q>>o;q
/* (non-Javadoc) H37Z\xS
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?Jma^ S
*/ O/5W-u
public void sort(int[] data) { mki=.l$O
MaxHeap h=new MaxHeap(); Kp99y
h.init(data); 9R E;50h
for(int i=0;i h.remove(); w"Z>F]YZ
System.arraycopy(h.queue,1,data,0,data.length); Uligr_c?
} pu^1s#g8w
-ss2X
private static class MaxHeap{ Wd%j;glG
h&Sl8$jVp
void init(int[] data){ >LNl8X:Cz*
this.queue=new int[data.length+1]; FKzqJwT
for(int i=0;i queue[++size]=data; }\irr9,
fixUp(size); 5<S1,u5
} 6jnRC*!?
} -~xd-9v?
R0+m7mx#E
private int size=0; !7w-?1?D
H11Wb(6Wu
private int[] queue; i?R qv<n
(g;Ff`P Pc
public int get() { w(@`g/b
return queue[1]; SHaZ-d
} vuK 5DG4
SY{J
public void remove() { WH/a#F
SortUtil.swap(queue,1,size--); D~{)\;w^!
fixDown(1); H1@"Yg8
} 6?Wsg`9
file://fixdown l%)XPb2$J
private void fixDown(int k) { {wm `
int j; vD*KJ3(c
while ((j = k << 1) <= size) { [;b9'7j'
if (j < size %26amp;%26amp; queue[j] j++; a#{a{>
if (queue[k]>queue[j]) file://不用交换 ;J_d%
break; J)(pGS@
SortUtil.swap(queue,j,k); B[*i}k%i
k = j; qzG'Gz{{qu
} :')<|(Zy
} D?E5p.!A
private void fixUp(int k) { Wl,yznT
while (k > 1) { Xu T|vh
int j = k >> 1; ="4jk=on
if (queue[j]>queue[k]) >SzTZ3!E
break; '.bMkty#
SortUtil.swap(queue,j,k); F%Xq}LMd
k = j; (O&b:D/Y
} /q^( uWu
} cEN^H
N0XGW_f
} z C``G<TB
?LW1D+
} 1k7E[G~G|
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SortUtil： $pD^O!I)?
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package org.rut.util.algorithm; eD/?$@y
EEaFi8
import org.rut.util.algorithm.support.BubbleSort; |GsLcUv6
import org.rut.util.algorithm.support.HeapSort; Qejzp/2
import org.rut.util.algorithm.support.ImprovedMergeSort; @B[V'|
import org.rut.util.algorithm.support.ImprovedQuickSort; 59)PJ0E
import org.rut.util.algorithm.support.InsertSort; g,1\Gj%y
import org.rut.util.algorithm.support.MergeSort; _7;#0B
import org.rut.util.algorithm.support.QuickSort; ru U|
import org.rut.util.algorithm.support.SelectionSort; #8(@a Y
import org.rut.util.algorithm.support.ShellSort; ugL$W@
rN*4Y
/** "44X'G8N
* @author treeroot OU[Sm7B
* @since 2006-2-2 c2y5[L7?
* @version 1.0 4v{gc/g
*/ c1Hv^*Y
public class SortUtil { )9*-Q%zc
public final static int INSERT = 1; aR3W9
public final static int BUBBLE = 2; ._nhW*
public final static int SELECTION = 3; 5-sxTp
public final static int SHELL = 4; \;sUJr"$
public final static int QUICK = 5; ]__M*
public final static int IMPROVED_QUICK = 6; rzex"}/ly
public final static int MERGE = 7; ?iq:Gf
public final static int IMPROVED_MERGE = 8; %@IR7v~
public final static int HEAP = 9; c~Ha68
X-%*`XG'
public static void sort(int[] data) { PeG8_X}u9
sort(data, IMPROVED_QUICK); ;+5eE`]a/L
} 7[K$os5al
private static String[] name={ %8v?dB;>x`
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ,,6e }o6
}; /1^%32c
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private static Sort[] impl=new Sort[]{ S2Wxf>bt2
new InsertSort(), L-Hl.UV
new BubbleSort(), |+[bKqI5
new SelectionSort(), 5bAy@n
new ShellSort(), !W6]+
new QuickSort(), [#.QDe
new ImprovedQuickSort(), .NPai4V'
new MergeSort(), NQOdgp
new ImprovedMergeSort(), ^ sz4rk
new HeapSort() e06r5%|.%
}; VJPt/Dy{
Vdjca:`
public static String toString(int algorithm){ f6z[k_lLN
return name[algorithm-1]; w+JDu_9+A]
} {? 6]_J
K}*s^*X
public static void sort(int[] data, int algorithm) { FkRrW^?5G
impl[algorithm-1].sort(data); Z*oGVr g
} \Q &Kd|
/|>z7#?m^
public static interface Sort { Iz ,C!c
public void sort(int[] data); P>)qN,a
} p{88v3b6
}3QEclZr
public static void swap(int[] data, int i, int j) { yYW>)
int temp = data; w 5,-+&;
data = data[j]; z S^:Ng5
data[j] = temp; K)&AR*Tc
} |{Oe&j3|
} VkUMMq{