[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; bWL!=
} 'v'[_(pq
int i1=l; x& _Y( bHA
int i2=mid+1; 8jCho
for(int cur=l;cur<=r;cur++){ zFOtOz`9H
if(i1==mid+1) >V.?XZ nt
data[cur]=temp[i2++]; 0d[O/Q`
else if(i2>r) ,u@:(G
data[cur]=temp[i1++]; t %u0=V
else if(temp[i1] data[cur]=temp[i1++]; L#`X ]E
else J@_M%eN
data[cur]=temp[i2++]; Qi\]='C
} i~x]!!
} EG4~[5[YgI
Kmx4bp4
} 5kqI
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改进后的归并排序: km>ZhsqD
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package org.rut.util.algorithm.support; QXj#Brp
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import org.rut.util.algorithm.SortUtil; n\9IRuYO
l_k:OZ
/** WG,Il/
* @author treeroot W,8Uu1X =
* @since 2006-2-2 Xg.Lo2s
* @version 1.0 W. d',4)
*/ [fCnq
public class ImprovedMergeSort implements SortUtil.Sort { t<Sa;[+
0SD'&
private static final int THRESHOLD = 10; )4fQ~)
(tO4UI5!
/* dr#%~I
* (non-Javadoc) T=NLBJ
* g)f& mQ)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5[g&0
*/ \<I&utn
public void sort(int[] data) { /y1+aTiJ
int[] temp=new int[data.length]; L%[>z'Zp
mergeSort(data,temp,0,data.length-1); ="G2I\
} [<r.M<3
x7B;\D#`i/
private void mergeSort(int[] data, int[] temp, int l, int r) { HH6n3c!:mm
int i, j, k; KrP?*yk
int mid = (l + r) / 2; "T[BSj?E
if (l == r) b1^wK"#
return; NJJ=ch
if ((mid - l) >= THRESHOLD) %,$xmoj9O]
mergeSort(data, temp, l, mid); Sv=e|!3f[k
else #n&/v'!\
insertSort(data, l, mid - l + 1); y?cN
if ((r - mid) > THRESHOLD) 0.m-}
mergeSort(data, temp, mid + 1, r); G9&2s%lu.e
else I>rTqOK
insertSort(data, mid + 1, r - mid); ,g'>Ib%
xi"ff.
for (i = l; i <= mid; i++) { |t"CH'KJZ
temp = data; :tbI=NDb
} }72\Aw5
for (j = 1; j <= r - mid; j++) { I[rR-4.F]
temp[r - j + 1] = data[j + mid]; r4cz?e|
} o]V.6Ge-
int a = temp[l]; XD8Cf!
int b = temp[r]; Qu<6X@+5
for (i = l, j = r, k = l; k <= r; k++) { |L*=\%t8
if (a < b) { X}G$ON
data[k] = temp[i++]; >/RFff]Fh0
a = temp; E el*P M
} else { M8:i]
data[k] = temp[j--]; D,*|:i
b = temp[j]; &I-T
} VZ IY=Q>g
} ,ye[TQ\,M
} VJ h]j(
s;Bh69
/** ]'n4e*
* @param data YeT{<9p
* @param l K%`]HW@I{
* @param i C ]B P}MY<
*/ AEM;ZQU
private void insertSort(int[] data, int start, int len) { DXj>u9*%
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); yQ^,>eh
} QiA}0q3]0
} H9'psv
} c?<)!9:
} tKyGD|g S
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堆排序： 6jm?d"9
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package org.rut.util.algorithm.support; 67/\0mV:~
xC5Pv">
import org.rut.util.algorithm.SortUtil; (!b)<V*
!\VEUF,K?
/** *[i49X&rd
* @author treeroot 5"G-r._
* @since 2006-2-2 Nk7=[y#z
* @version 1.0 u,:hT] ~+
*/ 0datzEns`
public class HeapSort implements SortUtil.Sort{ #?\(l%
7MZH'nO
/* (non-Javadoc) |_g7k2oLY
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) EF$ASNh"
*/ Q3hSWXq'
public void sort(int[] data) { ]5@n`;&#.
MaxHeap h=new MaxHeap(); 5|jY
h.init(data); a0k;way
for(int i=0;i h.remove(); ]iW:YNvXA
System.arraycopy(h.queue,1,data,0,data.length); QoUdTIIL
} ^B%ki
'y>Y*/
private static class MaxHeap{ y:Gn58\o
?Hdu=+ZV
void init(int[] data){ ) x+edYw
this.queue=new int[data.length+1]; z}==6|{
for(int i=0;i queue[++size]=data; aso8,mpZuA
fixUp(size); nVoWER:
} _pb*kJ
} "uL~D5!f
)w<Z4_!N4s
private int size=0; 9iJ$M!
Nw9:Gi
private int[] queue; UpD4'!<buV
%t6-wWM97
public int get() { "doiD=b
return queue[1]; :81d~f7
} {A< 961
h|PC?@jp
public void remove() { cR!M{U.q
SortUtil.swap(queue,1,size--); T(Yp90'6
fixDown(1); G0Z5h
} Vg,nNa3
file://fixdown \K"7U
private void fixDown(int k) { }:0ru_F)(4
int j; QL7.QG
while ((j = k << 1) <= size) { qs\Cwn!
if (j < size %26amp;%26amp; queue[j] j++; y]PuY\+
if (queue[k]>queue[j]) file://不用交换 | @ ut/
break; [aA@V0l
SortUtil.swap(queue,j,k); fwA8=oSZd
k = j; L58#ri=
} C+M]"{Y+
} zx$1.IM"4
private void fixUp(int k) { du~V=%9
while (k > 1) { h*40jZ
int j = k >> 1; 4sORp^t'Q
if (queue[j]>queue[k]) rp"5176
break; Id`V`|q
SortUtil.swap(queue,j,k); M:oM(K+
k = j; $kN=45SR
} oj{CNa
} \1<|X].jNY
^>ir&$
} 2z#S|$
<%d!Sk4
} xk/-TXB 0
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SortUtil： W,H8B%e
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package org.rut.util.algorithm; QnP3U
%x{kd8>u!
import org.rut.util.algorithm.support.BubbleSort; / yBrlf
import org.rut.util.algorithm.support.HeapSort; /W*Z.
import org.rut.util.algorithm.support.ImprovedMergeSort; gd7r9yV
import org.rut.util.algorithm.support.ImprovedQuickSort; _#r00Ze
import org.rut.util.algorithm.support.InsertSort; \X\f~CB
import org.rut.util.algorithm.support.MergeSort; | ?vm.zp
import org.rut.util.algorithm.support.QuickSort; eC%Skw
import org.rut.util.algorithm.support.SelectionSort; Cy/VH"G=
import org.rut.util.algorithm.support.ShellSort; eCsk\f`
vK+reXE
/** A-uIZ zC
* @author treeroot LWTPNp:"{w
* @since 2006-2-2 1,) yEeHjU
* @version 1.0 8TAJ#Lm
*/ <B0f
public class SortUtil { V7nOT*N:Q
public final static int INSERT = 1; l"}_+5
public final static int BUBBLE = 2; BK=w'1U
public final static int SELECTION = 3; ?$)5NQB%
public final static int SHELL = 4; RzL(Gnb
public final static int QUICK = 5; |BZrV3;H
public final static int IMPROVED_QUICK = 6; =+wd"Bu
public final static int MERGE = 7; jZkc yx
public final static int IMPROVED_MERGE = 8; NNbdP;=:u
public final static int HEAP = 9; TvDC4tm-:
kD;pj3o&"2
public static void sort(int[] data) { g6lWc@]F
sort(data, IMPROVED_QUICK); &*7KQd
} 9NU0K2S
private static String[] name={ p$|7T31 *
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" eZU9L/w:
}; @j}%{Km]Y
m#8PX$_
private static Sort[] impl=new Sort[]{ ;9h;oB@
new InsertSort(), %EVgSF!r
new BubbleSort(), hPNMp@Nm6
new SelectionSort(), #I453
new ShellSort(), n}A!aC
new QuickSort(), Mhti
new ImprovedQuickSort(), :zKMw=
new MergeSort(), 4L8hn4F
new ImprovedMergeSort(), `q<W %'Tb$
new HeapSort() U7D!w$4
}; HBOyiIm Q
#L+:MA7H
public static String toString(int algorithm){ h,m 90Hd+
return name[algorithm-1]; r <5}& B`
} `a MU2
9>9EZ?4m
public static void sort(int[] data, int algorithm) { fM"*;LN!N
impl[algorithm-1].sort(data); =s4(Y
} Lm2!<<<
A|+QUPD
public static interface Sort { ]'(D*4
public void sort(int[] data); n:`f.jG |
} gHstdp_3
9ZJ 8QH
public static void swap(int[] data, int i, int j) { Px=@Tw N,
int temp = data; ;mk[!
data = data[j]; -g2l-N{&
data[j] = temp; \_8wU'7
} xxu
} ]1<GZ`