[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; `f*Q$Ulqx
} Q9Kve3u-i
int i1=l; mi,E-
int i2=mid+1; tjdaaN#,V
for(int cur=l;cur<=r;cur++){ kXi6lh
if(i1==mid+1) B?'#4J
data[cur]=temp[i2++]; =;2%a(
else if(i2>r) MP_ ~<Q
data[cur]=temp[i1++]; ;C3US)j
else if(temp[i1] data[cur]=temp[i1++]; VGpWg rmHk
else -jb0o/:
data[cur]=temp[i2++]; i}.&0Fp
} lT&eJO~?5
} uRZZxZ
_kU:Z
} o<COm9)i
0K`#>}W#X
改进后的归并排序: y5?RVlKJ
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package org.rut.util.algorithm.support; :6vm+5!
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import org.rut.util.algorithm.SortUtil; E\as@pqo\p
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/** ^c^#dpn
* @author treeroot Fcd3H$Na;
* @since 2006-2-2 ST:A<Da"
* @version 1.0 IC1NKn<k
*/ @~!wDDS
public class ImprovedMergeSort implements SortUtil.Sort { 8FKXSqhVM
zgNc4B
private static final int THRESHOLD = 10; zNxW'?0Z?
'98VYCL
/* kEOS{C%6R
* (non-Javadoc) "B3N*R(["
* JBE!j-F
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) M>~Drul
*/ `$,GzS(
public void sort(int[] data) { y9q8i(E0
int[] temp=new int[data.length]; [d(U38BI
mergeSort(data,temp,0,data.length-1); nbm&wa[
} 1FlX'[vh
8ZM&(Lz7u
private void mergeSort(int[] data, int[] temp, int l, int r) { *K|W /'_&
int i, j, k; pA9+Cr!0Q
int mid = (l + r) / 2; &7PG.Ff!r
if (l == r) nExU#/*~^
return; wO'TBP
if ((mid - l) >= THRESHOLD) YG@t5j#b
mergeSort(data, temp, l, mid); w<Wf?aG
else YG3J$_?y0
insertSort(data, l, mid - l + 1); Cs9.&Y
if ((r - mid) > THRESHOLD) 8u6:=fxb
mergeSort(data, temp, mid + 1, r); VH9dleZ
else /{+y2.{j
insertSort(data, mid + 1, r - mid); mRL"nC
LhOa{1SY
for (i = l; i <= mid; i++) { M+U9R@
temp = data; [@J/eWB
} X-6de>=
for (j = 1; j <= r - mid; j++) { nuk*.Su
temp[r - j + 1] = data[j + mid]; '*5i)^
} 4]?<hH9
int a = temp[l]; a%kQl^I4
int b = temp[r]; gp>3I!bo[K
for (i = l, j = r, k = l; k <= r; k++) { g)#W>.Asd
if (a < b) { d:BG#\e]v
data[k] = temp[i++]; Yw^m
a = temp; wSa)*]%
} else { &dM. d!
data[k] = temp[j--]; 41`n1:-]
b = temp[j]; R=gb'
} lR )67a
} .E`\MtA
} |bTPtrT8
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/** ZrPbl"`7
* @param data j[`j9mM8
* @param l n^Hm;BiE#
* @param i NQBpX
*/ s}w{:Hk,x8
private void insertSort(int[] data, int start, int len) { h2Ld[xvCu%
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); )J2mM
} }>>1<P<8-
} 'u*DA|HC
} ,:%CB"J
} [pbo4e,4O
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堆排序： @.$|w>>T
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package org.rut.util.algorithm.support; IpYM;tYw&
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import org.rut.util.algorithm.SortUtil; '(U-(wTC'/
&dqLP95
/** EMY/~bQW
* @author treeroot idLWe9gC
* @since 2006-2-2 .nrMfl_
* @version 1.0 q]T1dz?
*/ z[b@V
public class HeapSort implements SortUtil.Sort{ s'!Cp=xQF"
J1( 9QN[w
/* (non-Javadoc) S0zD"T
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^uKwB;@
*/ |Luqoa
public void sort(int[] data) { 3@kf@Vf
MaxHeap h=new MaxHeap(); +ieY:H[
h.init(data); @:+8?qcP
for(int i=0;i h.remove(); 6n,i0W
System.arraycopy(h.queue,1,data,0,data.length); |:nn>E}ZA/
} cz >V8
/)YNs7gR
private static class MaxHeap{ ,]bhyp
:ci5r;^
void init(int[] data){ \hTm)-FP
this.queue=new int[data.length+1]; &5\iM^
for(int i=0;i queue[++size]=data; dG@%jD)
fixUp(size); %RTBV9LIXr
} <^&ehy:7y
} z06r6
`F-/QX[:
private int size=0; Oxm>c[R
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private int[] queue; (up~[
w mn+
public int get() { %'bM){
return queue[1]; /a{la8Ni
} * aN
umjt]Gu[
public void remove() { }q_<_lQ
SortUtil.swap(queue,1,size--); 2M.fLQ?
fixDown(1); Ur9?Td'*>
} D9<!mH
file://fixdown N4v~;;@(
private void fixDown(int k) { NSxoF3
int j; PRx8I .
while ((j = k << 1) <= size) { 2<i!{;u$qL
if (j < size %26amp;%26amp; queue[j] j++; '=39+*6?
if (queue[k]>queue[j]) file://不用交换 I@T8Iv=
break; *w|:~g
SortUtil.swap(queue,j,k); SEo'(-5
k = j; tI`Q/a5@
} BBaQ}{F8>2
} APvDP?
private void fixUp(int k) { W<bGDh
while (k > 1) { @P#N2:jwj
int j = k >> 1; w^Sz#_2
if (queue[j]>queue[k]) CNih6R
break; ( Z619w
SortUtil.swap(queue,j,k); !=pn77`g>
k = j; $|L Sx
} ynq}76 H0k
} N@2dA*T,
,kiv>{
} y`VyQWW
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} I5`4Al
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SortUtil： 0pK=o"^?@
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package org.rut.util.algorithm; ;ic3).H
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import org.rut.util.algorithm.support.BubbleSort; { d=^}-^
import org.rut.util.algorithm.support.HeapSort; iJ-23_D
import org.rut.util.algorithm.support.ImprovedMergeSort; #H)vK"hF
import org.rut.util.algorithm.support.ImprovedQuickSort; 02f~En}>6
import org.rut.util.algorithm.support.InsertSort; 4QH3fTv
import org.rut.util.algorithm.support.MergeSort; !02`t4Zc-
import org.rut.util.algorithm.support.QuickSort; ~Y`ldL
import org.rut.util.algorithm.support.SelectionSort; ,`|3KE9
import org.rut.util.algorithm.support.ShellSort; y<?kzt
/sUYU(3
/** Ghu#XJB?
* @author treeroot h`]Iy
* @since 2006-2-2 \RNNg
* @version 1.0 ?ME6+Z\
*/ [glLre^
public class SortUtil { 35A|BD)q
public final static int INSERT = 1; ?8I?'\F;
public final static int BUBBLE = 2; zkt+7,vI
public final static int SELECTION = 3; <->{
public final static int SHELL = 4; $ZUdT
public final static int QUICK = 5; 18|m)(W
public final static int IMPROVED_QUICK = 6; '<jyw
public final static int MERGE = 7; u#Pa7_zBj]
public final static int IMPROVED_MERGE = 8; /'Ass(=6
public final static int HEAP = 9; 7TgOK
\MsTB|Z
public static void sort(int[] data) { Umz KY
sort(data, IMPROVED_QUICK); <5-[{Q/2z
} xmNB29#
private static String[] name={ -Y1e8H ='
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Z)e/!~""]
}; i/65v
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private static Sort[] impl=new Sort[]{ SAH-p*.
new InsertSort(), c-x,fS"&W
new BubbleSort(), 61,;Uc\T
new SelectionSort(), ?274uAO'
new ShellSort(), ]jtK I4
new QuickSort(), J}*,HT*
new ImprovedQuickSort(), 8Ry3`ct
new MergeSort(), &x=.$76
new ImprovedMergeSort(), F<ZYh
new HeapSort() =qoWCmg"&
}; l\E%+?K+^
",p;Sd
public static String toString(int algorithm){ 0QBiC]9
return name[algorithm-1]; 6|K5!2
} d:_t-ZZo
3YeG$^y"
public static void sort(int[] data, int algorithm) { P!$Zx)T
impl[algorithm-1].sort(data); o906/5M
} bH-ub2@qO
}HL]yDO
public static interface Sort { 9"@\s$ OBk
public void sort(int[] data); q YC;cKv
} {i1|R"ta
xVf|G_5$
public static void swap(int[] data, int i, int j) { 6 +Sxr
int temp = data; z F_M*8=
data = data[j]; &LmJ!^#
data[j] = temp; 4ae`pAu
} ?# Mr
} 8/DS:uM