[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; =iQ`F$M
} =FC;d[U
int i1=l; "#"Fp&Z7
int i2=mid+1; e&VR>VJEA
for(int cur=l;cur<=r;cur++){ ;gw!;!T
if(i1==mid+1) c&iK+qvh{
data[cur]=temp[i2++]; 4FP~+
else if(i2>r) t,as{.H{h
data[cur]=temp[i1++]; L@x8hUG"
else if(temp[i1] data[cur]=temp[i1++]; hghto \G5Y
else x%Y a*T
data[cur]=temp[i2++]; DqC}f#
} 8;dbU*
} E* DVQ3~
wh[:wE]eX
} 8Nl|\3nl-
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改进后的归并排序: a(QZZq};S
dzC&7 9$
package org.rut.util.algorithm.support; $9u
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import org.rut.util.algorithm.SortUtil; YnL?t-$Gg
SwmPP-n
/** T"0)%k8lJ
* @author treeroot <38@b ]+
* @since 2006-2-2 !B38! L
* @version 1.0 jH#^O;A
*/ 9Z_OLai
public class ImprovedMergeSort implements SortUtil.Sort { "rlSK >`
OgpH{"
private static final int THRESHOLD = 10; U=<.P;+f9
-W"0,.Dvg
/* x~Esu}x7
* (non-Javadoc) i1H80m s
* F/,<dNJ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;<ma K*f\S
*/ :{='TMJ7
public void sort(int[] data) { Q)i`.mHfFI
int[] temp=new int[data.length]; OU964vv
mergeSort(data,temp,0,data.length-1); R;m0eG`
} .Yv.-A=ZIg
jm!C^5!
private void mergeSort(int[] data, int[] temp, int l, int r) { af5`ktx
int i, j, k; _=M'KCL*)
int mid = (l + r) / 2; ;.[$
if (l == r) *Zo o
return; |~vQ0D
if ((mid - l) >= THRESHOLD) GZ>% &^E
mergeSort(data, temp, l, mid); ~m=%a
else }u*@b10
insertSort(data, l, mid - l + 1); YD>>YaH_3@
if ((r - mid) > THRESHOLD) zbKW.u]v
mergeSort(data, temp, mid + 1, r); (6y3"cbe
else Y8xnvK*
insertSort(data, mid + 1, r - mid); r{3`zqo
Xv(9 YhS
for (i = l; i <= mid; i++) { X!+ a;wr
temp = data; ,$(v#Tz
} v/6,eIz
for (j = 1; j <= r - mid; j++) { CoN/L`.SN
temp[r - j + 1] = data[j + mid]; z7}zf@Y-qv
} >Ezwl5b
int a = temp[l]; Rm1`D
int b = temp[r]; CO+jB
for (i = l, j = r, k = l; k <= r; k++) { .7^-*HT}
if (a < b) { 1X}Tp\e
data[k] = temp[i++]; 93eqFCF.
a = temp; 8 =Lv7G%
} else { 40sLZa)e
data[k] = temp[j--]; P+|8MT0
b = temp[j]; %H~gN9Vn#@
} #\;w::
} HPH{{p
} NB#*`|qt
2cL)sP}
/** NKh{iSLm
* @param data ~"YNG?Rre
* @param l bHT@]`@@
* @param i %hb5C 4q
*/ RL)3k8pk
private void insertSort(int[] data, int start, int len) { d*(\'6?
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); "8 mulE,
} @{a-IW3
} _Cs}&Bic_
} Oydmq,sVe(
} TmZ[?IL,
6(^9D_"@
堆排序： w1G.^
diLl>z
package org.rut.util.algorithm.support; lH>XIEj
nEEGO~e
import org.rut.util.algorithm.SortUtil; RUtS_Z&
meD (ja
/** E,:pIw
* @author treeroot Czxrn2p/
* @since 2006-2-2 cY]Y8T)
* @version 1.0 <~*Ol+/
*/ j7+t@DqQ
public class HeapSort implements SortUtil.Sort{ vp9<.*h
_7.y4zQJ
/* (non-Javadoc) 5hK\YTU
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) LkB!:+v |B
*/ GK%ovK
public void sort(int[] data) { *03/:q^(
MaxHeap h=new MaxHeap(); v('d H"Y
h.init(data); W>nb9Isp
for(int i=0;i h.remove(); gD=5M\
System.arraycopy(h.queue,1,data,0,data.length); * v]UgPk
} {f3fc8(p
y]%,Y=%X
private static class MaxHeap{ ;O11)u?/s|
u.FDe2|[)
void init(int[] data){ 3:#rFb
this.queue=new int[data.length+1]; mnjA8@1
for(int i=0;i queue[++size]=data; eF1%5;" W
fixUp(size); XOU$3+8q5
} Q0_W<+`
} c/U6K yiK
@v=q,A8_
private int size=0; fMaNv6(
NyLnE
private int[] queue; loe>"_`Cq
lM"7 Z
public int get() { R |%
return queue[1]; d vxEXy
} wCmv/m
jtY~-@*
public void remove() { 59]9-1" +
SortUtil.swap(queue,1,size--); [1GEe
fixDown(1); @NE#P&f
} ~Xw?>&
file://fixdown D|:sSld @
private void fixDown(int k) { :/qO*&i,N
int j; 9#6/c
while ((j = k << 1) <= size) { #Q7$I.O]
if (j < size %26amp;%26amp; queue[j] j++; N Z`hy>LF^
if (queue[k]>queue[j]) file://不用交换 i`'^ zR(`i
break; H-w|JH>g
SortUtil.swap(queue,j,k); RY<b]|
k = j; Uk6!Sb
} )&Bv\Tfjt
} j}l8k@f
private void fixUp(int k) { 3>Snd9Q
while (k > 1) { %/zZ~WIf
int j = k >> 1; w'XgW0j{
if (queue[j]>queue[k]) efR$s{n!
break; NM.B=<Aw*
SortUtil.swap(queue,j,k); `1]9(xwhQ0
k = j; fk1f'M)/8
} k;7.qhe:
} mO.U)tL[
I9>*Yy5RNS
} q+~CA[H5K
o+TZUMm
} ,eCXT=6
K67? d
SortUtil： ;i>E@
|lV9?#!
package org.rut.util.algorithm; W|U1AXU7/
]E^f8s0#V
import org.rut.util.algorithm.support.BubbleSort; U^\~{X
import org.rut.util.algorithm.support.HeapSort; BH a>2N
import org.rut.util.algorithm.support.ImprovedMergeSort; 6QQ oHYtZ
import org.rut.util.algorithm.support.ImprovedQuickSort; <vDm(-i3
import org.rut.util.algorithm.support.InsertSort; ?%Fk0E#>2
import org.rut.util.algorithm.support.MergeSort; UULL:vqq
import org.rut.util.algorithm.support.QuickSort; =:eE!
import org.rut.util.algorithm.support.SelectionSort; z?[DW*
import org.rut.util.algorithm.support.ShellSort; k)Wz b
F DX+
/** 2Zip8f!
* @author treeroot f34&:xz2U
* @since 2006-2-2 G|_aU8b|t
* @version 1.0 G.TX1
*/ 926oM77
public class SortUtil { "@$STptkc
public final static int INSERT = 1; ?UDO%`X
public final static int BUBBLE = 2; )A=g# D#
public final static int SELECTION = 3; %WR"85
public final static int SHELL = 4; U{(07GNm#
public final static int QUICK = 5; aS G2K0
public final static int IMPROVED_QUICK = 6; 7+4"+CA
public final static int MERGE = 7; ulJYJ+CC!
public final static int IMPROVED_MERGE = 8; ^MV%\0o
public final static int HEAP = 9; =]"|x7'!
ifZNl,
public static void sort(int[] data) { Ypj)6d
sort(data, IMPROVED_QUICK); ,$$$_+m\
} oW6<7>1M7
private static String[] name={ \}NWR{=
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" I=a$1%BzEX
}; Qpf]3
kH-b!
private static Sort[] impl=new Sort[]{ 0u2uYiE-l
new InsertSort(), yVzg<%CR^
new BubbleSort(), :G/]rDtd
new SelectionSort(), 7g+]
new ShellSort(), caD;V(
new QuickSort(), C/VYu-p%
new ImprovedQuickSort(), f om"8iL1
new MergeSort(), e}AJxBE
new ImprovedMergeSort(), (OQ @!R&
new HeapSort() ;NeEgqW"
}; MiM=fIuw@s
][#*h`I
public static String toString(int algorithm){ m]q!y3
return name[algorithm-1]; 6qpV53H
} >Fk`h=Wd
5zna?(#}
public static void sort(int[] data, int algorithm) { j88sE MZ
impl[algorithm-1].sort(data); Fxx2vTV4ag
} /+O8A}
15DK\_;
public static interface Sort { Hd`p_?3]
public void sort(int[] data); u?Mu*r?
} $OoN/^kv
ld:alEo
public static void swap(int[] data, int i, int j) { ~ O=|v/]
int temp = data; )^f Q@C8
data = data[j]; R9G)X]
data[j] = temp; 9yw/-nA
} pu*u[n
} 8w?\_P7QA