[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; jCkYzQUPz
} aVEg%8
int i1=l; ;BsyN[bF
int i2=mid+1; }Til $TT%H
for(int cur=l;cur<=r;cur++){ x^&D8&4^
if(i1==mid+1) ; &$djP
data[cur]=temp[i2++]; rz5AIe>Hm
else if(i2>r) Cjdw@v0;
data[cur]=temp[i1++]; 7xqTTN6h
else if(temp[i1] data[cur]=temp[i1++]; a%cCR=s=
else =XuBan3B>
data[cur]=temp[i2++]; !;>j(xc
} Y<odXFIS
} M, f6UYo=
n'>`2 s
} #fd;]
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改进后的归并排序: _46 y
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package org.rut.util.algorithm.support; v,^2'C$o
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import org.rut.util.algorithm.SortUtil; #!qa#.Yi
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/** f5'Cq)Vw_
* @author treeroot < j^8L^
* @since 2006-2-2 {FNmYneh?6
* @version 1.0 4-1=1)c*
*/ +G)L8{FY(
public class ImprovedMergeSort implements SortUtil.Sort { hX;JMQ915
e'Njl?>3
private static final int THRESHOLD = 10; 5o-WA1
`saDeur#X
/* D<%/:M
* (non-Javadoc) Wb4+U;C^!'
* .'aW~WR
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) XnR9/t
*/ /x\{cHAt8J
public void sort(int[] data) { j\@Ht~G
int[] temp=new int[data.length]; k/srT<
mergeSort(data,temp,0,data.length-1); _P,3~ ;
} xA/Ein0
d.>Zn?u4L
private void mergeSort(int[] data, int[] temp, int l, int r) { _[M*o0[@W
int i, j, k; Qu]F<H*Y|
int mid = (l + r) / 2; ^26vP7
if (l == r) 6_}& WjU'
return; 4Cm+xAXG
if ((mid - l) >= THRESHOLD) Vh=10Et
mergeSort(data, temp, l, mid); m%7T ~
else I8M^]+c
insertSort(data, l, mid - l + 1); 7 G37V"''
if ((r - mid) > THRESHOLD) D[#6jJAb
mergeSort(data, temp, mid + 1, r); `,~8(rIM
else "0Ca;hSLM2
insertSort(data, mid + 1, r - mid); IHC {2 ^
,0k3Qi%
for (i = l; i <= mid; i++) { PLoD^3uG)
temp = data; nz+k ,
} @~g][O#Fu
for (j = 1; j <= r - mid; j++) { cug=k
temp[r - j + 1] = data[j + mid]; ey!QAEg"X1
} I.'(n8*
int a = temp[l]; df9jT?l
int b = temp[r]; ~&{LMf
for (i = l, j = r, k = l; k <= r; k++) { pd%h5|*n;
if (a < b) { A-S!Z2m\
data[k] = temp[i++]; a>6@1liT
a = temp; mLGbwm'K
} else { S1SsJo2\
data[k] = temp[j--]; u?xXZ]_u-
b = temp[j]; L JW0UF|
} s[2>r#M
} MbbKo-7F$
} ` b$u w
h_*!cuH
/** }LYK:?_/
* @param data I)s~kA.e
* @param l KdN+$fe*g
* @param i v2K6y|6,
*/ k z{_H`5.
private void insertSort(int[] data, int start, int len) { nNj<!}HvV
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); *gGL5<%T:
} VelR8tjP
} ais@|s;
} crvq]J5
} i`st'\I
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堆排序： lJ>OuSd
n=_jmR1
package org.rut.util.algorithm.support; v#Xl
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import org.rut.util.algorithm.SortUtil; ^s.necg0
vXI2u;=y
/** 5oOF|IYi
* @author treeroot I l2`c}9
* @since 2006-2-2 ~Y)h[
* @version 1.0 t?l0L1;
*/ ))9w)A@
public class HeapSort implements SortUtil.Sort{ JnodDH ?
(Vz\02,K
/* (non-Javadoc) Thc"QIk&4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !TwH;#U w
*/ xQKRUHDc
public void sort(int[] data) { D:Rr|m0Tk
MaxHeap h=new MaxHeap(); k\/idd[
h.init(data); qi51'@
for(int i=0;i h.remove(); #^i.[7p
System.arraycopy(h.queue,1,data,0,data.length); :@oy5zib
} i!KZg74V
+ $Yld{i
private static class MaxHeap{ P&kjtl68Y
09_5niaz[
void init(int[] data){ SW; %2
this.queue=new int[data.length+1]; L!qXt(`
for(int i=0;i queue[++size]=data; ~[*\YN);
fixUp(size); 42B_8SK
} SI"y&[iw
} X6Wj,a
0r/pZ3/
private int size=0; kklM"Av
n-)Xs;`2
private int[] queue; 31*0b|Z
.$]%gjIBCl
public int get() { +CaA%u
return queue[1]; ;l$F<CzJay
} kZU v/]Y.
ud`!X#e~
public void remove() { n`TXmg
SortUtil.swap(queue,1,size--); Pbo759q1
fixDown(1); aK+jpi4?
} IUZ@n0/T
file://fixdown K (!+l
private void fixDown(int k) { ?7k%4~H t
int j; FBk_LEcX
while ((j = k << 1) <= size) { ]>_Ie?L)<
if (j < size %26amp;%26amp; queue[j] j++; v<u`wnt
if (queue[k]>queue[j]) file://不用交换 |,)=-21&;
break; 9V/:1I0?&0
SortUtil.swap(queue,j,k); ^hyY,X
k = j; &)Z!A*w]
} K3I|d;Y~X!
} A8jj]J+
private void fixUp(int k) { drkY~!a
while (k > 1) { %Bf;F;xuB
int j = k >> 1; B\mRHV!
if (queue[j]>queue[k]) hH3~O`~
break; [OU[i(,{
SortUtil.swap(queue,j,k); W? SFtz
k = j; uKF)'gj
} |f}1bJE+
} H4Lvw8G
gq|]t<'
} H="E#AC%8/
*Y\C5L]
} {wq~+O
B{6wf)[O
SortUtil： lXnzomU
sngM4ikhs
package org.rut.util.algorithm; Bkaupvv9S
]Te,m}E
import org.rut.util.algorithm.support.BubbleSort; e{RhMjX<D
import org.rut.util.algorithm.support.HeapSort; 7}%Z>
import org.rut.util.algorithm.support.ImprovedMergeSort; fC<pCdsg
import org.rut.util.algorithm.support.ImprovedQuickSort; Jb1L[sT2
import org.rut.util.algorithm.support.InsertSort; ze_q+Z
import org.rut.util.algorithm.support.MergeSort; 8G<{L0J%!
import org.rut.util.algorithm.support.QuickSort; r&0IhE
import org.rut.util.algorithm.support.SelectionSort; >u=Dc.lX
import org.rut.util.algorithm.support.ShellSort; tX'2 $}
dd6m/3uUW
/** 9Z!|oDP-
* @author treeroot [!'fE#"a
* @since 2006-2-2 58>C,+
* @version 1.0 [19QpK WM
*/ P;7 Y9}
public class SortUtil { zxhE9 [`*e
public final static int INSERT = 1; #*|Gp_l+%
public final static int BUBBLE = 2; +5xVgIk#
public final static int SELECTION = 3; "'@>cJ=
public final static int SHELL = 4; +B#+'
public final static int QUICK = 5; *^=zQ~
public final static int IMPROVED_QUICK = 6; E,wOWs*
public final static int MERGE = 7; ,2MLYW,
public final static int IMPROVED_MERGE = 8; ?#]wxH,
public final static int HEAP = 9; ^Yg}>?0
VlbS\Y.
public static void sort(int[] data) { wRsh@I<
sort(data, IMPROVED_QUICK); tH^]`6"QUa
} i[7<l&K]
private static String[] name={ 2M$^|j:[
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" n=1_-)
}; 8{)j"rghah
l1#F1q`^t
private static Sort[] impl=new Sort[]{ }T1.~E
new InsertSort(), K?$|Y-_D^M
new BubbleSort(), U,7O{YM
new SelectionSort(), 0E^6"nt7N
new ShellSort(), chs] ,7R
new QuickSort(), QTLGM-Z
new ImprovedQuickSort(), ww#]i&6
new MergeSort(), H$44,8,m
new ImprovedMergeSort(), "xxt_
new HeapSort() Uz$.sa
}; HpGI\s
Zv|TvlyT"
public static String toString(int algorithm){ Uw5AHq).
return name[algorithm-1]; a]4h5kJ';
} 'fS&WVR?
i8Xz'Sw07
public static void sort(int[] data, int algorithm) { FhJtiw@
impl[algorithm-1].sort(data); bg/a5$t
} |SSe n#PYp
!E.CpfaC
public static interface Sort { t;/s^-}
public void sort(int[] data); b-Xc6f
} J*nWCL
1ww#]p`1
public static void swap(int[] data, int i, int j) { mi'3ibCG
int temp = data; HY>zgf,0
data = data[j]; O;83A
data[j] = temp; , aJC7'(
} ZgI?#e
} oUNuM%g9Dy