[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; oy5+}`
} -k{Jp/-D
int i1=l; L\L"mc|O
int i2=mid+1; J`<f
for(int cur=l;cur<=r;cur++){ +"uwV1)b"
if(i1==mid+1) <d"Gg/@a
data[cur]=temp[i2++]; 0`n 5x0R
else if(i2>r) 8=F%+
data[cur]=temp[i1++]; jDTUXwx7V
else if(temp[i1] data[cur]=temp[i1++]; SF< [FM%1
else "PzP;Br
data[cur]=temp[i2++]; DA=1KaJ.
} ug#<LO-.Rd
} o&$hYy"<.L
fHfY}BQS
} 2~FPw{]j
|I^y0Q:K
改进后的归并排序: !SF^a6jT
{mSJUK?TKl
package org.rut.util.algorithm.support; 8lwM{?k$
%F J#uQXZ
import org.rut.util.algorithm.SortUtil; K-(;D4/sQE
d>!p=O`>{q
/** {/ &B!zvl
* @author treeroot h8=h >W-
* @since 2006-2-2 Qra>}e%*
* @version 1.0 &{W^W8,%
*/ WZ?!!
public class ImprovedMergeSort implements SortUtil.Sort { *jF#^=
>^3zU
private static final int THRESHOLD = 10; >nry0 ;z0,
"EH,J
/* ~/|zlu*jpc
* (non-Javadoc) |C D}<r(N
* _M5Xk?e=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;|TT(P:d
*/ K@r*;T
public void sort(int[] data) { O<GF>
int[] temp=new int[data.length]; zu<3^=3
mergeSort(data,temp,0,data.length-1); @^?XaU
} YwAnqAg
9=$!gC)
private void mergeSort(int[] data, int[] temp, int l, int r) { bk3Unreh
int i, j, k; kG^dqqn6
int mid = (l + r) / 2; 'msmXX@q
if (l == r) U9#WN.noG
return; 5AOfp2O
if ((mid - l) >= THRESHOLD) 2OalAY6RS
mergeSort(data, temp, l, mid); Jqru AW<
else @!\K>G >9[
insertSort(data, l, mid - l + 1); -0 0}if7
if ((r - mid) > THRESHOLD) GZ8:e3ri
mergeSort(data, temp, mid + 1, r); I7mG/
else <zfKC
insertSort(data, mid + 1, r - mid); F_ljx
(M`|'o!
for (i = l; i <= mid; i++) { *IZf^-=Q
temp = data; LC-)'Z9}5
} R0<< f]
for (j = 1; j <= r - mid; j++) { U:|H9+5
temp[r - j + 1] = data[j + mid]; J&6:d
} Gzm$OHbn
int a = temp[l]; o~C('1Fdb
int b = temp[r]; ez*jjm
for (i = l, j = r, k = l; k <= r; k++) { iP "EA8
if (a < b) { -_~)f{KN@
data[k] = temp[i++]; jTSOnF}C~+
a = temp; 5 =Z!hQ}
} else { Uix{"
data[k] = temp[j--]; qI2'u%
b = temp[j]; #D)x}#V\
} }.{}A(^YR
} 9;KJr[FQV
} j|K.i/
&U&%ka<*
/** Coa-8j*R7
* @param data @J vZ[T/
* @param l >V!LitdJ
* @param i sR*Nq5F#9
*/ '[Gm8K5
private void insertSort(int[] data, int start, int len) { Fu)Th|5GZ
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); arh@`'Q
} @E_zR
} ^ vbWRG~
} 2F?kjg,
} 8QF`,oXQO
gb 4pN
堆排序： nGrVw&
;nB2o-%
package org.rut.util.algorithm.support; 3s(Ia^
v8@eW.I1
import org.rut.util.algorithm.SortUtil; @Fx@5e
FA$zZs10\
/** EOVZGZF
* @author treeroot b3U6;]|x
* @since 2006-2-2 @]'SeiNp
* @version 1.0 V(mnyI
*/ qm(1:iK,0
public class HeapSort implements SortUtil.Sort{ 1^{`lK~2
._<ii2K'
/* (non-Javadoc) JSW&rn
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =n0*{~r
*/ -(;LQDG |
public void sort(int[] data) { 8/Rm!.8+~
MaxHeap h=new MaxHeap(); c8DZJSO
h.init(data); `ROEV~
for(int i=0;i h.remove(); Dip*}8$o(w
System.arraycopy(h.queue,1,data,0,data.length); $a.u05
} n33kb/q*
U9ZbVjqv@
private static class MaxHeap{ a8s4T$
b!a %YLL
void init(int[] data){ ^M Ey,
this.queue=new int[data.length+1]; nGa1a
for(int i=0;i queue[++size]=data; ;f%|3-q1[
fixUp(size); QN G&
} J22rv(
} '29WscU
R&So4},B
private int size=0; 3g'+0tEl
a%K}j\M
private int[] queue; )HVcG0H1
QIAR
public int get() { D ,M@8h,
return queue[1]; M|%c(K#E,3
} |.w;r
arj$dAW
public void remove() { uO'/|[`8
SortUtil.swap(queue,1,size--); ,sDr9h/'C3
fixDown(1); ?q Xs-
} l3J$md|f
file://fixdown ;~/4d-
private void fixDown(int k) { a[C&e,)}
int j; H/jm f5
while ((j = k << 1) <= size) { l{%a&/
if (j < size %26amp;%26amp; queue[j] j++; Y';>O`
if (queue[k]>queue[j]) file://不用交换 !_^g8^>2(
break; Y4To@TrN#\
SortUtil.swap(queue,j,k); IZ~.{UQ
k = j; <lo`q<q
} GqUSVQ
} 3j*'HST
private void fixUp(int k) { sh6(z?KP
while (k > 1) { =_QkH!vI
int j = k >> 1; i6>R qP!69
if (queue[j]>queue[k]) pP\h6b+B
break; knSuzq%*
SortUtil.swap(queue,j,k); n,nisS
k = j; }O*WV1
} V/bH^@,sA
} ~`Sle xK|}
)w"0w(
} yNva1I
4<}A]BQVkJ
} ']?=[`#NL
Y6VQ:glDT-
SortUtil： 8"M<{72U]
CEqZ:c
package org.rut.util.algorithm; r~oSP^e'
ct0v$ct>f
import org.rut.util.algorithm.support.BubbleSort; }1m_o@{3P
import org.rut.util.algorithm.support.HeapSort; "{( [!
import org.rut.util.algorithm.support.ImprovedMergeSort; ( V4G<-jG
import org.rut.util.algorithm.support.ImprovedQuickSort; O5-;I,)H
import org.rut.util.algorithm.support.InsertSort; x!?Z*v@I
import org.rut.util.algorithm.support.MergeSort; M 9"-WIG@h
import org.rut.util.algorithm.support.QuickSort; :]c=pH
import org.rut.util.algorithm.support.SelectionSort; F<r4CHfh;
import org.rut.util.algorithm.support.ShellSort; ;r!\-]5$
0w3b~RJ
/** 0&$xX!]
* @author treeroot Gvn: c/m;
* @since 2006-2-2 c]v +
* @version 1.0 Taasi` k
*/ Mi74Xl i
public class SortUtil { QymD-A"P
public final static int INSERT = 1; O71BM@2<
public final static int BUBBLE = 2; s.y}U5Ty?P
public final static int SELECTION = 3; g1qi\axm
public final static int SHELL = 4; sqG`"O4W
public final static int QUICK = 5; h{/ve`F>@
public final static int IMPROVED_QUICK = 6; /=ylQn3 *
public final static int MERGE = 7; (C`@a/q
public final static int IMPROVED_MERGE = 8; RVP18ub.S
public final static int HEAP = 9; z!CD6W1n
-N z}DW>
public static void sort(int[] data) { t w!.%_1^
sort(data, IMPROVED_QUICK); XV5`QmB9
} U;gp)=JNT
private static String[] name={ 4$Pr|gx
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" #!d]PH746
}; b-nYxd
mV zu~xym
private static Sort[] impl=new Sort[]{ *<k&#D"m
new InsertSort(), DV,DB\P$
new BubbleSort(), N84qcc
new SelectionSort(), {^wdJZ~QLK
new ShellSort(), rfTe
new QuickSort(), XnY"oDg^>
new ImprovedQuickSort(), ]) n0MF)p
new MergeSort(), o?dR\cxj
new ImprovedMergeSort(), la702)N{
new HeapSort() PP-kz;|
}; 'w6hW7"L
i+AUQ0Zbf6
public static String toString(int algorithm){ `,Zb2"
return name[algorithm-1]; g)cY\`&W8
} } J(1V!EA
x@Vt[}e
public static void sort(int[] data, int algorithm) { (UcFNeo
impl[algorithm-1].sort(data); tgW kX
} /e<5Np\X
6 [ _fD
public static interface Sort { Ilef+V^qr
public void sort(int[] data); GZ"/k<~0
} CWvlr nv
n?Zf/T
public static void swap(int[] data, int i, int j) { Y)OBTX
int temp = data; M5u_2;3
data = data[j]; [R\=M'
data[j] = temp; |."G?*
} h0XH`v
} Bb_Q_<DTs