[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; V;~\+@
} Lo}/k}3Sx
int i1=l; -h8Z@r~a/
int i2=mid+1; 6D{70onY+
for(int cur=l;cur<=r;cur++){ uX1{K%^<TW
if(i1==mid+1) ,eqRI>,\
data[cur]=temp[i2++]; X?`mYoe
else if(i2>r) %Z*)<[cIE0
data[cur]=temp[i1++]; aouYPxA`
else if(temp[i1] data[cur]=temp[i1++]; wg:\$_Og
else 2IkyC`
data[cur]=temp[i2++]; :kjs: 6f]
} e\*(F3r
} '?X?'_3
I0^oaccM
} u:wijkx
jOK!k
改进后的归并排序: sY]pszjT
3z"%ht~;
package org.rut.util.algorithm.support; : 'jVA
87+u`~
import org.rut.util.algorithm.SortUtil; ~)ysEZl
PklJU:Pu\U
/** 4 .(5m\s!
* @author treeroot ~!%G2E!
* @since 2006-2-2 <si cldz
* @version 1.0 @;S)j!m`
*/ !y2yS/
public class ImprovedMergeSort implements SortUtil.Sort { #TeAw<2U
'I2[}>mj2
private static final int THRESHOLD = 10; ``rYzj_
h 3 J&
/* Q,ZV C
* (non-Javadoc) n# FkgXP$
* ._.Qf<7
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Yb:F,d-Ya
*/ MY(51)*
public void sort(int[] data) { Jt?`(H
int[] temp=new int[data.length]; 8CvNcO;H0
mergeSort(data,temp,0,data.length-1); m/,8\+
} xZQyH
{OS[0LB
private void mergeSort(int[] data, int[] temp, int l, int r) { 'BVI^H4
int i, j, k; 5T'viG}%
int mid = (l + r) / 2; b%VZPKA;
if (l == r) ,}Im^~5
return; -KqMSf&9
if ((mid - l) >= THRESHOLD) 'loko#6
mergeSort(data, temp, l, mid); /c7jL4oD
else (^<skx>
insertSort(data, l, mid - l + 1); =#&+w[4?&.
if ((r - mid) > THRESHOLD) N)KN!!
mergeSort(data, temp, mid + 1, r); kn&BGYt
else ;YBk.} %
insertSort(data, mid + 1, r - mid); 9h6siK(F
`vf]C'
for (i = l; i <= mid; i++) { C2DAsSw
temp = data; m*KI'~#$%
} U\[b qw
for (j = 1; j <= r - mid; j++) { 4'N 4,3d$
temp[r - j + 1] = data[j + mid]; )31xl6@
} EKmn@S-&P
int a = temp[l]; ;iUO1t)^
int b = temp[r]; Go[anf
for (i = l, j = r, k = l; k <= r; k++) { ~D/1U)kt
if (a < b) { b~TTz`HZ
data[k] = temp[i++]; A[:(#iR5-E
a = temp; fvA167\
} else { pE.TG4
data[k] = temp[j--]; r8o^8.
b = temp[j]; ;9vY5CxzC
} vOtILL6
} >V>GiSni
} TEC#owz
}rWg']
/** DMKtTt[}
* @param data JDOn`7!w
* @param l +9#qNkP
* @param i "`* >co6r
*/ %e+*&Z',
private void insertSort(int[] data, int start, int len) { F$O$Y[
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); &NI\<C7_Gw
} }CrWmJu0
} -L wz T
} w@a|_?
} ')(U<5y)
acj-*I
堆排序： 3u,B<
[-R[rF
package org.rut.util.algorithm.support; `SS[[FT$>
>U]KPL[%
import org.rut.util.algorithm.SortUtil; TA~ZN^xI
._&SS,I5VZ
/** ++=jh6
* @author treeroot Rq|]KAN
* @since 2006-2-2 x l=i_
* @version 1.0 Lo=n)cV1,
*/ TT&%[A+
public class HeapSort implements SortUtil.Sort{ :fnK`RnaQ
6 8Vxy
/* (non-Javadoc) iY5V4Gbo
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) vxrqUjK7
*/ Mh}vr%0;)
public void sort(int[] data) { _93:_L
MaxHeap h=new MaxHeap(); 7~L_>7;
h.init(data); -NA2+].
for(int i=0;i h.remove(); ZCNO_g
System.arraycopy(h.queue,1,data,0,data.length); *\`<=,H6<
} ?5j~"
$1k@O@F(4
private static class MaxHeap{ <%=<9~e
D@c@Dt
void init(int[] data){ fC$@m_-KD
this.queue=new int[data.length+1]; cPg{k}9Tvy
for(int i=0;i queue[++size]=data; y QGd<(
fixUp(size); 5>~D3?IAd
} OLqynY
} ^szi[Cj
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private int size=0; U7-*]ik
f#gV>.P;h\
private int[] queue; 2_)gJ_kP
@H}Hjg_>m
public int get() { 9d!mGnl
return queue[1]; nt%p@e!,
} Hv%$6,/*v
V$dhiP z
public void remove() { ;f} ']2
SortUtil.swap(queue,1,size--); !mUO/6Q hq
fixDown(1); 4AKPS&k;
} 9xFI%UOb#
file://fixdown t~8H~%T>v
private void fixDown(int k) { vD(:?M
int j; :Vw{ lB
while ((j = k << 1) <= size) { o3h>)4
if (j < size %26amp;%26amp; queue[j] j++; Q2* ~9QkU
if (queue[k]>queue[j]) file://不用交换 SEH[6W3
break; =uR3|U(.|u
SortUtil.swap(queue,j,k); (]zi;
k = j; -oB=7+g
} @0 [^SU?
} S,vdd7Y
private void fixUp(int k) { rCb#E}
while (k > 1) { (D{J|
int j = k >> 1; z:u)@>6D1
if (queue[j]>queue[k]) 0!tuUn
break; rU1Ri
SortUtil.swap(queue,j,k); ACpecG
k = j; QuC_sFP10
} tjx|;m7
} ZEvK
)g KC}_h=
} >B;KpO"+m
]kF1~kXBe
} + f:!9)C
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SortUtil： %OP|%^2
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package org.rut.util.algorithm; M0`1o p1
p8Z;QH*
import org.rut.util.algorithm.support.BubbleSort; #L57d
import org.rut.util.algorithm.support.HeapSort; dqO]2d
import org.rut.util.algorithm.support.ImprovedMergeSort; =r3g:j/>q
import org.rut.util.algorithm.support.ImprovedQuickSort; =y`-:j\
import org.rut.util.algorithm.support.InsertSort; 6;;2e> e
import org.rut.util.algorithm.support.MergeSort; l+X\>,
import org.rut.util.algorithm.support.QuickSort; d ,.=9
import org.rut.util.algorithm.support.SelectionSort; ]EG8+K6
import org.rut.util.algorithm.support.ShellSort; A8Km8"
SwM=?<
/** XWq"_$&LF
* @author treeroot U]g9t<jD
* @since 2006-2-2 P!!O~P
* @version 1.0 kfZ(:3W$
*/ 0|8cSE< i
public class SortUtil { @a,=ApS"
public final static int INSERT = 1; G2-0r.f
public final static int BUBBLE = 2; m!=5Q S3Z
public final static int SELECTION = 3; e>bARK<
public final static int SHELL = 4; "bQi+@
public final static int QUICK = 5; k;)mc+ ~+
public final static int IMPROVED_QUICK = 6; w^,Xa
public final static int MERGE = 7; WZh_z^rwn
public final static int IMPROVED_MERGE = 8; y,w_x,m
public final static int HEAP = 9; L!,@_
=d]}7PO~
public static void sort(int[] data) { ( GoPXh
sort(data, IMPROVED_QUICK); }}k*i0
} 5u3KL A
private static String[] name={ wSPmiJ/!
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" i'\-Y]?[
}; ?CcX>R-/
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private static Sort[] impl=new Sort[]{ H({m1v ~R
new InsertSort(), <FI*A+I4\
new BubbleSort(), IreY8.FND
new SelectionSort(), gyhy0
new ShellSort(), dczSW]%
new QuickSort(), u]i%<Yy89
new ImprovedQuickSort(), {7;QZk(
new MergeSort(), %5nEyZOq
new ImprovedMergeSort(), %~,Fe7#p
new HeapSort() R.vOYzo
}; _x^rHADp
i ^2A:6}?
public static String toString(int algorithm){ AlkHf]oB
return name[algorithm-1]; N">#fYix
} oK$Krrs0&
XODp[+xEEt
public static void sort(int[] data, int algorithm) { C ,|9VH
impl[algorithm-1].sort(data); ?<Lm58p8
} ]E'?#z.t
k8%@PC$
public static interface Sort { xEeHQ7J
public void sort(int[] data); 7AWq3i{
} A}&YK,$5ED
.rnT'""i<5
public static void swap(int[] data, int i, int j) { rBy0hGx
int temp = data; UBk:B
data = data[j]; c;06>1=wP5
data[j] = temp; OK YbEn#
} %d%?\jVb
} )VqPaKZl