[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; 6%8,OOS
} ]>%M%B
int i1=l; >kN%R8*Sx
int i2=mid+1; qyl9#C(a
for(int cur=l;cur<=r;cur++){ +:#x!i;W8[
if(i1==mid+1) rERHfr`OU
data[cur]=temp[i2++]; g,,'Pdd7Pn
else if(i2>r) "7RnT3
data[cur]=temp[i1++]; zwEZ?m!
else if(temp[i1] data[cur]=temp[i1++]; r:QLO~l/
else Z8yt8O
data[cur]=temp[i2++]; O*%@(w6
} re-;s
} 4#c-?mh_
DGY?4r7>y
} m0(]%Kdw
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改进后的归并排序: LE1#pB3TG
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package org.rut.util.algorithm.support; cIJqF.k
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import org.rut.util.algorithm.SortUtil; aVXk8zuL
%l.5c Sn@
/** zQNkjQ{mx
* @author treeroot ztRe\(9bL
* @since 2006-2-2 W? ^ ?Kx
* @version 1.0 3gcDc~~=
*/ SJXA
public class ImprovedMergeSort implements SortUtil.Sort { Z<2j#rd
btV Tt5
private static final int THRESHOLD = 10; NUvHY:
q]qKU`m!Q`
/* h jCkj(b
* (non-Javadoc) ^ rB7&96C,
* D')m8:>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) i4XE26B;e
*/ erW[q
public void sort(int[] data) { C72!::o
int[] temp=new int[data.length]; lNQ8$b
mergeSort(data,temp,0,data.length-1); `7))[._
} PU\?eA
r-,P
private void mergeSort(int[] data, int[] temp, int l, int r) { Y4 <
int i, j, k; }0 BKKU+
int mid = (l + r) / 2; H1bPNt63
if (l == r) (i"@{[IP
return; >>nt3q
if ((mid - l) >= THRESHOLD) uoIvFcb^
mergeSort(data, temp, l, mid); Y9K$6lz
else NdlJdq
insertSort(data, l, mid - l + 1); dg?[gD8!4&
if ((r - mid) > THRESHOLD) h ?Ni5
mergeSort(data, temp, mid + 1, r); 1syI%I1
else !RJuH;8
insertSort(data, mid + 1, r - mid); mqx#N%
fF\s5f#:
for (i = l; i <= mid; i++) { ~G;lEp
temp = data; 0CTUcVM#9
} eVVm"96Q.;
for (j = 1; j <= r - mid; j++) { ZMI!Sl
temp[r - j + 1] = data[j + mid]; t.7KS:
} 7E-1 #4
int a = temp[l]; b&i0)/;
int b = temp[r]; _2wU(XYH
for (i = l, j = r, k = l; k <= r; k++) { +-VkRr#
if (a < b) { is2OJ,
data[k] = temp[i++]; +].Zs<
a = temp; Wd R~
} else { I`~ofq?r
data[k] = temp[j--]; p7\}X.L
b = temp[j]; &6yh4-(7
} lhyWlO
} YCWt%a*I'
} Q}A*{9#|
^o*$OM7x
/** L*rND15
* @param data +~E;x1&'
* @param l G<S(P@ss
* @param i 3Pj 6(cf
*/ 6zJ<27
private void insertSort(int[] data, int start, int len) { " ^t3VjN
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); &<s[(w!%%
} ;{zgp
} h=fzX.dt
} .??[qBOTE
} J`&*r;""V
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堆排序： vp"b_x1-
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package org.rut.util.algorithm.support; *~t&Ux#hj
^F>C|FJ2
import org.rut.util.algorithm.SortUtil; ot"3 3I
) r8yt}
/** *gq~~(jH
* @author treeroot B.e3IM0
* @since 2006-2-2 -2{NIF^H
* @version 1.0 n#{z"G
*/ <"93
public class HeapSort implements SortUtil.Sort{ D8`dEB2|S
P6n9yJ$,cb
/* (non-Javadoc) 69z,_p$@:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @Kx@ 2#~b
*/ !9B`
public void sort(int[] data) { #s4v0auK
MaxHeap h=new MaxHeap(); (}]ae*
h.init(data); Gu3# y"a>
for(int i=0;i h.remove(); {Qe7/ln!
System.arraycopy(h.queue,1,data,0,data.length); zNZ"PYh<u
} Kx-s95t
XLog+F$`
private static class MaxHeap{ yX-h|Cr"
%\ifnIQ
void init(int[] data){ u%o2BLx
this.queue=new int[data.length+1]; \Ax[/J2aO
for(int i=0;i queue[++size]=data; ;tBc&LJ?
fixUp(size); aSN"MTw.
} ,?'":T1[
} qs["&\@
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private int size=0; f _ O
c]u^0X?&
private int[] queue; ?`,Rkg0fe
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public int get() { i^i^g5l!
return queue[1]; VGHy|5K$
} eJ=K*t|
\Y>!vh X
public void remove() { %[ Z[
SortUtil.swap(queue,1,size--); lZt{L0
fixDown(1); NoR=:Q 9e
} jt*VD>ji
file://fixdown &!adW@y
private void fixDown(int k) { ggy 7p44
int j; |JR;E$
while ((j = k << 1) <= size) { f&n6;N
if (j < size %26amp;%26amp; queue[j] j++; p^E}%0#
if (queue[k]>queue[j]) file://不用交换 -F]0Py8(
break; y[pU8QSt
SortUtil.swap(queue,j,k); |%i|P)]
k = j; M)<4|x
} >h[ {_+
} {m<NPtp910
private void fixUp(int k) { k=7+JI"J
while (k > 1) { _YT9zG
int j = k >> 1; ?>\JX
if (queue[j]>queue[k]) HxH.=M8S_
break; zRz7*o&l
SortUtil.swap(queue,j,k); @S-p[u
k = j; B!z-O*fLE1
} ff1Em.
} /.Fvl;!J;
Mzbbr57n
} |, Lp1
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} 7p!w(N?s
#U=}Pv~wM
SortUtil： f:).wi Ld
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package org.rut.util.algorithm; ?puZqVu5
c^$+=-G{fd
import org.rut.util.algorithm.support.BubbleSort; IIrXI8'}
import org.rut.util.algorithm.support.HeapSort; L, k\`9bQ
import org.rut.util.algorithm.support.ImprovedMergeSort; p?#cn
import org.rut.util.algorithm.support.ImprovedQuickSort; }'FNGn.~#
import org.rut.util.algorithm.support.InsertSort; .ZB/!WiF
import org.rut.util.algorithm.support.MergeSort; jW?siQO^
import org.rut.util.algorithm.support.QuickSort; b')Lj]%;k
import org.rut.util.algorithm.support.SelectionSort; Wb|xEwqd`
import org.rut.util.algorithm.support.ShellSort; %U4w@jp
Y?^1=9?6
/** z]d^%>Ef
* @author treeroot [T5z}!_y
* @since 2006-2-2 <0,szw
* @version 1.0 _;M46o%h
*/ w'Cn3b)`
public class SortUtil { 1e0O-aT#Q
public final static int INSERT = 1; a9OJC4\
public final static int BUBBLE = 2; N~w4|q!]
public final static int SELECTION = 3; +Y:L4`
public final static int SHELL = 4; wl*"Vagb
public final static int QUICK = 5; #kuk3}&
public final static int IMPROVED_QUICK = 6; <Bmqox0
public final static int MERGE = 7; )k@+8Yfa1p
public final static int IMPROVED_MERGE = 8; 0Q]p#;
public final static int HEAP = 9; +h*.%P}o
`wyX)6A|bt
public static void sort(int[] data) { Gob;dku
sort(data, IMPROVED_QUICK); )ZU=`!4
} .q>4?+
private static String[] name={ w84 ]s%y
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" T@GR Tg
}; l<](8oc. w
f>u{e~Q,
private static Sort[] impl=new Sort[]{ GisI/Ir[
new InsertSort(), A5lP%&tu(
new BubbleSort(), 4zF|}aiQ
new SelectionSort(), eBK s-2r
new ShellSort(), #$vef
new QuickSort(), i>Cxi ZT
new ImprovedQuickSort(), I)$of9
new MergeSort(), XZcT-w7
new ImprovedMergeSort(), HzO6hb{jJO
new HeapSort() I82?sQ7
}; !f(aWrw7e6
!~'\Ey
public static String toString(int algorithm){ U`j[Ni}"
return name[algorithm-1]; -jZP&8dPH
} }T?MWcG4
/S]W<8d
public static void sort(int[] data, int algorithm) { s[yIvlHw`
impl[algorithm-1].sort(data); (1bz.N8z
} hIj[#M&6
9`8\<a'rU
public static interface Sort { ."m6zq
public void sort(int[] data); imx/hz!
} ASuxty
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public static void swap(int[] data, int i, int j) { O<R6^0B42
int temp = data; q%4l!gzF3
data = data[j]; Z\=].[,w4
data[j] = temp; Nxu10
} 9o.WJ
} Lw=.LN