[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; IPpN@
} y.k~Y0
int i1=l; 8Fh)eha9f
int i2=mid+1; 372rbY
for(int cur=l;cur<=r;cur++){ u#~RkY7s
if(i1==mid+1) ; 2#y7!
data[cur]=temp[i2++]; Jpq~
else if(i2>r) t?gic9 q
data[cur]=temp[i1++]; T!{w~'=F
else if(temp[i1] data[cur]=temp[i1++]; NxY#NaE:?4
else ^76]0`gS
data[cur]=temp[i2++]; re<{ >
} ="H%6S4'
} wlvgg
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} P+sW[:
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改进后的归并排序: (CL%>5V
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package org.rut.util.algorithm.support; n@i HFBb
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import org.rut.util.algorithm.SortUtil; r6qj7}\
z<;HQX,
/** Or+U@vAnk
* @author treeroot _[3D
* @since 2006-2-2 }X6m:#6
* @version 1.0 "sCRdx]_
*/ +\A,&;!SR
public class ImprovedMergeSort implements SortUtil.Sort { Qv-_ jZ
rlLMT6r.8
private static final int THRESHOLD = 10; _VN?#J)o
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/* B9 uoVcW
* (non-Javadoc) ObS3 M
* !.gIHY
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ITBE|b
*/ p l0\2e)
public void sort(int[] data) { /6*42[r
int[] temp=new int[data.length]; +'a^f5
mergeSort(data,temp,0,data.length-1); !pW0qX\1n
} d0ksG$
/~?*=}c^m
private void mergeSort(int[] data, int[] temp, int l, int r) { )akoa,#%6c
int i, j, k; LL!Dx%JZ
int mid = (l + r) / 2; 8<.Oq4ku
if (l == r) ki!0^t:9
return; t*u:hex
if ((mid - l) >= THRESHOLD) +6\Zj)
mergeSort(data, temp, l, mid); n\53wh@+
else W!(zT6#
insertSort(data, l, mid - l + 1); Sm|6 %3
if ((r - mid) > THRESHOLD) AkV#J, 3LC
mergeSort(data, temp, mid + 1, r); eMsd37J
else u#.2w)!D
insertSort(data, mid + 1, r - mid); x;d6vBTUb
4HlQ&2O%#
for (i = l; i <= mid; i++) { IJ"q~r$
temp = data; D@.6>:;il
} eauF~md,
for (j = 1; j <= r - mid; j++) { 0h_|t-9j
temp[r - j + 1] = data[j + mid]; Y3b *a".X
} /x$nje,.
int a = temp[l]; ;_(4Q*Yx
int b = temp[r]; 7:1Lol-V
for (i = l, j = r, k = l; k <= r; k++) { c@7rqHU-0
if (a < b) { p5iuYHKk?
data[k] = temp[i++]; &QgR*,5eo
a = temp; Rm( "=(
} else { }7Q%6&IR
data[k] = temp[j--]; 5b*C1HS@X
b = temp[j]; 8ib:FF(= u
} |{ip T SH
} L8B!u9%
} 77Y/!~kd
V,njO{Q
/** 7.oM J
* @param data fHFE){
* @param l z} #JK?u
* @param i k(HUUH_z
*/ |L ev.,,Ph
private void insertSort(int[] data, int start, int len) { %ET+iIhK
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); g7H(PF?
} Z T%5T}i
} /N{*"s2)
} (LCfUI6;
} })%{AfDRF
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堆排序： AwR=]W;j
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package org.rut.util.algorithm.support; GbI/4<)l}
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import org.rut.util.algorithm.SortUtil; [/r(__.
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/** _[BP0\dPW
* @author treeroot hZb_P\1X
* @since 2006-2-2 E1 2uZ$X
* @version 1.0 FSO).=#
*/ F== p<lrs
public class HeapSort implements SortUtil.Sort{ XiWmV ?
K&-"d/QuLg
/* (non-Javadoc) !N^@4*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {.Jlbi9!
*/ gSj,E8-g
public void sort(int[] data) { :3 mh@[V
MaxHeap h=new MaxHeap(); +}AI@+
h.init(data); "AqB$^S9t
for(int i=0;i h.remove(); 8oGRLYU N
System.arraycopy(h.queue,1,data,0,data.length); -~w'Xo#
} $??I/6
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private static class MaxHeap{ 2=}FBA,2
QJ;2ZN,
void init(int[] data){ tuX|\X
this.queue=new int[data.length+1]; ueNS='+m
for(int i=0;i queue[++size]=data; *un^u-;
fixUp(size); u3D)M%e
} H5an%kU|j
} sLk-x\P]|
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private int size=0; x+]"
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private int[] queue; (9)Q ' 'S
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public int get() { ['D]>Ot68
return queue[1]; <_+X 88
} BA.uw_^4
XjBD{m(
public void remove() { /$m;y[[
SortUtil.swap(queue,1,size--); zQ PQ
fixDown(1); #-J>NWdt
} /bmN\I
file://fixdown a+QpM*n7Lq
private void fixDown(int k) { !,PWb3S
int j; j>kqz>3
while ((j = k << 1) <= size) { y();tsWqc
if (j < size %26amp;%26amp; queue[j] j++; q^nVN#
if (queue[k]>queue[j]) file://不用交换 W,u:gzmhw
break; wd6owr
SortUtil.swap(queue,j,k); &^nGtW%a 9
k = j; %so]L+r2!
} wL[ M:
} ,zc(t<|-y
private void fixUp(int k) { \M-OC5fQv
while (k > 1) { rC5O")I<
int j = k >> 1; `vV7c`K?
if (queue[j]>queue[k]) !r-F>!~
break; Q2>gU#
SortUtil.swap(queue,j,k); 7HWmCaa[
k = j; []T8k9g/-
} v@pky0
} 5r0YA IJ
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} 30{ gI0jk
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} I1J-)R+
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SortUtil： =~gvZV-<
9YGY,sx
package org.rut.util.algorithm; Y/oHu@ _
+C)~bb*
import org.rut.util.algorithm.support.BubbleSort; /wv0i3_e
import org.rut.util.algorithm.support.HeapSort; <3 uNl
import org.rut.util.algorithm.support.ImprovedMergeSort; ~#/
import org.rut.util.algorithm.support.ImprovedQuickSort; Dp:BU|r
import org.rut.util.algorithm.support.InsertSort; jiGTA:v
import org.rut.util.algorithm.support.MergeSort; EM_d8o)`B
import org.rut.util.algorithm.support.QuickSort; gM]:Ma
import org.rut.util.algorithm.support.SelectionSort; d zMb5puH
import org.rut.util.algorithm.support.ShellSort; MK*r+xfSae
.)3<Q}>
/** TqQ[_RKg2
* @author treeroot Ort(AfW
* @since 2006-2-2 +7a6*;\ y
* @version 1.0 OTv)
*/ \7_y%HR
public class SortUtil { @VI@fN
public final static int INSERT = 1; @6]JIJE
public final static int BUBBLE = 2; {..6>fS
public final static int SELECTION = 3; N>E_%]Ch
public final static int SHELL = 4; gDzK{6Z}
public final static int QUICK = 5; jWgX_//!
public final static int IMPROVED_QUICK = 6; FTldR;}(
public final static int MERGE = 7; %2h>-.tY
public final static int IMPROVED_MERGE = 8; 8XaQAy%d]
public final static int HEAP = 9; |BYRe1l6l
iRBfx
public static void sort(int[] data) { GX%g9f!O
sort(data, IMPROVED_QUICK); u@^LW<eD
} (?];VG
private static String[] name={ mZBo~(}
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ig"L\ C"T
}; tX[WH\(xI
l"]V6!-U
private static Sort[] impl=new Sort[]{ 1Ws9WU
new InsertSort(), H*6W q
new BubbleSort(), R-14=|7a-
new SelectionSort(), _dU\JD
new ShellSort(), v^PO|Z
new QuickSort(), NlXimq
new ImprovedQuickSort(), 1mJHued=6
new MergeSort(), sRfcF`7
new ImprovedMergeSort(), zeRyL3fnmb
new HeapSort() }a/Cro.~4
}; @]0%L0u
(%9$!v{3
public static String toString(int algorithm){ 0{mex4
return name[algorithm-1]; Zd&S@Z
} ?cZlN!
[Qr"cR^
public static void sort(int[] data, int algorithm) { !m$jk2<
impl[algorithm-1].sort(data); ,,TnIouy
} $Q0n
W3RT{\
public static interface Sort { ]'S^]
public void sort(int[] data); Y*hCMy;
} >sbu<|]a 7
S>{~nOYt-`
public static void swap(int[] data, int i, int j) { =c7;r]Ol
int temp = data; V8(-
data = data[j]; pot~<d`:K"
data[j] = temp; 9u:Q,0\
} 2rMpgV5
} #"an9<