[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; X,CFY
} nECf2>Yp v
int i1=l; y{P9k8v!z
int i2=mid+1; dR{ V,H7N
for(int cur=l;cur<=r;cur++){ .Sw'Bo!Ee
if(i1==mid+1) I"?&X4%e
data[cur]=temp[i2++]; l[{}ZKZ
else if(i2>r) 84cH|j`w
data[cur]=temp[i1++]; XmR5dLc8
else if(temp[i1] data[cur]=temp[i1++]; cYS+XBz
else k;X1x65uP
data[cur]=temp[i2++]; Lxrn#Z eM
} Xh!Pg)|E
} Lwk-
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} 3o^M%
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改进后的归并排序: j)*nE./3
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package org.rut.util.algorithm.support; `vBa.)u
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import org.rut.util.algorithm.SortUtil; (Ad!hyE(
}Cf[nGh|B
/** Okc*)crw
* @author treeroot Dw,f~D$+ic
* @since 2006-2-2 KHiJOeLc
* @version 1.0 DJUtuex
*/ ~Wv?p4
public class ImprovedMergeSort implements SortUtil.Sort { +06j+I
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private static final int THRESHOLD = 10; 5!*a,$S
OSk9Eb4ld
/* B[50{;X
* (non-Javadoc) nsk 6a
* E~^'w.1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !CKUkoX
*/ Df^S77&c!
public void sort(int[] data) { 3}Qh`+Yj]
int[] temp=new int[data.length]; Y1IlH8+0
mergeSort(data,temp,0,data.length-1); '"^JNb^I
} Xi.?9J`@
,pzCJ@5
private void mergeSort(int[] data, int[] temp, int l, int r) { TVA1FD
int i, j, k; Nig-D>OS
int mid = (l + r) / 2; g(k|"g`*
if (l == r) H=C;g)R
return; Y2n*T KXI,
if ((mid - l) >= THRESHOLD) 566Qikw2
mergeSort(data, temp, l, mid); qzz'v
else Y{=@^4|]
insertSort(data, l, mid - l + 1); -f=hL7NW
if ((r - mid) > THRESHOLD) _!7o
mergeSort(data, temp, mid + 1, r); %3j5Q
else >^&+,*tsS4
insertSort(data, mid + 1, r - mid); 2X_ef
.&y1gh!=
for (i = l; i <= mid; i++) { E3!twR*Aw
temp = data; {W]jVh p
} #ZA YP
for (j = 1; j <= r - mid; j++) { P>|2~YxjU
temp[r - j + 1] = data[j + mid]; v&n&i?
} }^muAr
int a = temp[l]; V_!i KEU
int b = temp[r]; 5oS\uX|
for (i = l, j = r, k = l; k <= r; k++) { tANG ]
if (a < b) { .+>}},
data[k] = temp[i++]; YVT^}7#
a = temp; -bwl~3ZTi
} else { &^.'g{\Y
data[k] = temp[j--]; bb{+
b = temp[j]; 0*)79Sz
} `c(@WK4
} DN+`Q{KS
} '&d4xc
#=rR[:M
/** cc[w%jlA#
* @param data }MNm>3
* @param l (]:G"W8f
* @param i @lwqkJ
*/ a|.u;
private void insertSort(int[] data, int start, int len) { Ero3A'f
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); x>^S..K}L%
} _bX)fnUu
} 7u zN/LAF
} x?3p3[y
} XL:7$
:|a[6Uwl\V
堆排序： <\5{R@A*6
y{&,YV&_h
package org.rut.util.algorithm.support; '&9b*u";x(
x-1[2K1"[
import org.rut.util.algorithm.SortUtil; `JRdOe
*4ID$BmO
/** KvQ9R!V
* @author treeroot _#+i;$cO-X
* @since 2006-2-2 y.zW>Mfl
* @version 1.0 9;PtYdJ8
*/ jzQgDed ]
public class HeapSort implements SortUtil.Sort{ O'k"6sBb
yxH[uJpb
/* (non-Javadoc) KLX>QR@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >(3y(1;
*/ 8:f(PN
public void sort(int[] data) { w"~T5%p
MaxHeap h=new MaxHeap(); 9I,Trk@&
h.init(data); #u~8Txt
for(int i=0;i h.remove(); aa|xZ
System.arraycopy(h.queue,1,data,0,data.length); y=t -/*K
} v"j7},P@
){v nmJJ%
private static class MaxHeap{ p|zW2L
^Kn}{m/3Y
void init(int[] data){ ^Oo%`(D?
this.queue=new int[data.length+1]; }u :sh >2
for(int i=0;i queue[++size]=data; BwR)--75
fixUp(size); +7=3[K
} Z',pQ{rD
} 0VPa=AW
xu3qX"
private int size=0; WkT4&|POJ
:>|[ o&L
private int[] queue; SO|$X
-0Ps.B
public int get() { 'h$1vT
return queue[1]; &Mol8=V)
} uKK+V6}!kj
|1#*`2j\=9
public void remove() { =m UtBD.;
SortUtil.swap(queue,1,size--); W+e
fixDown(1); T{Av[>M
} Z\n nVM=
file://fixdown XOU 9r(
private void fixDown(int k) { 0y*8;7-|r)
int j; @,$>H7o
while ((j = k << 1) <= size) { nBR4j?':i
if (j < size %26amp;%26amp; queue[j] j++; svN&~@l
if (queue[k]>queue[j]) file://不用交换 (<|,LagTuc
break; J%{>I
SortUtil.swap(queue,j,k); *&XOzaVU
k = j; MGK%F#PM
} arm26YA-,
} r3'0{Nn+
private void fixUp(int k) { cJMp`DQzc
while (k > 1) { U`z=!KI+g
int j = k >> 1; tmKHT
if (queue[j]>queue[k]) Ch>r.OfP
break; =XVw{\#9 b
SortUtil.swap(queue,j,k); a0~LZQ?
k = j; nH_M#
} m9 1Gc?c
} Ejmpg_kux
a5caryZ"z
} gamE^Ee
f\xmv|8
} TXdo,DPv7
42M_ %l_
SortUtil： 0Xb,ne 7
2)hfYLi
package org.rut.util.algorithm; xIA]5@;a
[n4nnmM
import org.rut.util.algorithm.support.BubbleSort; 9:R3+,ZN
import org.rut.util.algorithm.support.HeapSort; b+1!qNuCW#
import org.rut.util.algorithm.support.ImprovedMergeSort; nr&bpA/
import org.rut.util.algorithm.support.ImprovedQuickSort; iYD5~pK8
import org.rut.util.algorithm.support.InsertSort; rU+3~|m
import org.rut.util.algorithm.support.MergeSort; xpX<iT>5u
import org.rut.util.algorithm.support.QuickSort; oz:"w nX
import org.rut.util.algorithm.support.SelectionSort; 1oe,>\\
import org.rut.util.algorithm.support.ShellSort; +-C.E
/%g+|C
/** $GP66Ev
* @author treeroot ":0u%E?s
* @since 2006-2-2 rGQ2 ve
* @version 1.0 eR%\_;}7;
*/ 0<7sM#sI!
public class SortUtil { &(oA/jFQ
public final static int INSERT = 1; 63'm @oZ
public final static int BUBBLE = 2; ~UJ.A<>Fh
public final static int SELECTION = 3; @^T~W^+
public final static int SHELL = 4; O}>@G
public final static int QUICK = 5; R2v9gz;W
public final static int IMPROVED_QUICK = 6; A 0v=7 ]
public final static int MERGE = 7; ]DKRug5
public final static int IMPROVED_MERGE = 8; EsGf+-}|!0
public final static int HEAP = 9; d(|q&b:
~Oa$rqu%m
public static void sort(int[] data) { Li]bU
sort(data, IMPROVED_QUICK); WG A1XQ{
} 0N^+d,Xt.
private static String[] name={ U$mDAi$
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 6#7hMQ0&;O
}; iLch3[p%
y_X jY
private static Sort[] impl=new Sort[]{ 4d\^
new InsertSort(), N"}>);r
new BubbleSort(), 'y\Je7
new SelectionSort(), <4+P37^~
new ShellSort(), 9v_s_QkL2
new QuickSort(), ;Ax-f04gG
new ImprovedQuickSort(), s>m2qSu
new MergeSort(), Z/%FQ
new ImprovedMergeSort(), )i}j\";>L
new HeapSort() A+="0{P
}; @Wc5r#
ss[`*89
public static String toString(int algorithm){ u Jqv@GFv
return name[algorithm-1]; g35!a<JW
} Xd=KBB[r?
AY{KxCrb^
public static void sort(int[] data, int algorithm) { K_;vqi^1^&
impl[algorithm-1].sort(data); UB.1xcI
} jd](m:eG
}9+;-*m/
public static interface Sort { is4}s,]$6
public void sort(int[] data); sSh{.XuB+3
} gom!dB0J
3Do0?~n
public static void swap(int[] data, int i, int j) { ^FKiVKI:
int temp = data; Z#Mm4(KNh
data = data[j]; HEBeJ2w
data[j] = temp; eAfi!!Z<
} [3jJQ3O,
} =0pt-FQ