[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; W$o27f
} NU\ 5{N<
int i1=l; maY4g&'f
int i2=mid+1; sv(f;ib
for(int cur=l;cur<=r;cur++){ I3:[= ,5
if(i1==mid+1) (?kl$~&|
data[cur]=temp[i2++]; l|+BC
else if(i2>r) ?D)<,
data[cur]=temp[i1++]; TLf9>= OVh
else if(temp[i1] data[cur]=temp[i1++]; {d%&zvJnD
else 1w0OKaF5
data[cur]=temp[i2++]; G"59cv8z4R
} KkMay
} CBKkBuKuk
C"qU-&*v
} lvpc*d|K
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改进后的归并排序: 9Sq%s&
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package org.rut.util.algorithm.support; <U9/InN0[
f8<o8*`7
import org.rut.util.algorithm.SortUtil; R%H$%cnj
b7\ cxgRq
/** \zkw2*t
* @author treeroot vF/ =J
* @since 2006-2-2 )|<_cwz
* @version 1.0 n*'<uKpM
*/ Grz 3{U
public class ImprovedMergeSort implements SortUtil.Sort { 0Hw-59MK
iH2n.M "
private static final int THRESHOLD = 10; m&0"<V!H/B
"SoHt]%#
/* /DO/Tqdfe
* (non-Javadoc) b2^AP\: k
* uw7{>9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -g/hAxb5
*/ N_Af3R1_
public void sort(int[] data) { !b-bP,q
int[] temp=new int[data.length]; Na,_
mergeSort(data,temp,0,data.length-1); pA#}-S%
} (|fm6$
Ld,5iBiO:
private void mergeSort(int[] data, int[] temp, int l, int r) { B 2.q3T
int i, j, k; 5;TuVU.8Q
int mid = (l + r) / 2; x2#qg>`l
if (l == r) XfzVcap
return; PaCzr5!~f
if ((mid - l) >= THRESHOLD) jSQ9.%4
mergeSort(data, temp, l, mid); >(tn"2
else B)h>8 {
insertSort(data, l, mid - l + 1); X0+fsf<H}
if ((r - mid) > THRESHOLD) 7W9d6i)
mergeSort(data, temp, mid + 1, r); 0i8hI6d
else oXt,e
insertSort(data, mid + 1, r - mid); hsG#6?l3
=`C4qC_
for (i = l; i <= mid; i++) { DV]7.Bm
temp = data; l??;3kh1
} |__=d+M'
for (j = 1; j <= r - mid; j++) { .`Zf}[5[
temp[r - j + 1] = data[j + mid]; i!dv0|_
} =S]a&*M
int a = temp[l]; Px'!;
int b = temp[r]; F[7x*-NO-
for (i = l, j = r, k = l; k <= r; k++) { ` e{BId
if (a < b) { B7-RU<n
data[k] = temp[i++]; 9f}XRz
a = temp; )06iV
} else { "n\%_'R\hH
data[k] = temp[j--]; E)t
b = temp[j]; 8C.!V =@\
} 6j8<Q 2
} jUjr6b"
} !m{2WW-
9-bG<`v\E
/** H.O(*Q=
* @param data [H"#7t.V-~
* @param l [ij,RE7,T
* @param i g>7Y~_}
*/ {lzG*4?
private void insertSort(int[] data, int start, int len) { jV7&Y.$zF]
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); >n7["7HHk
} z]$j7dp
} eE/%6g
} {rkn q_;0
} 8R69q:
af+}S9To
堆排序： 8h?X!2Nq
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package org.rut.util.algorithm.support; q:HoKJv4
Ew^ @Aq
import org.rut.util.algorithm.SortUtil; dNVv4{S
hK}bj
/** }Pg' vJW
* @author treeroot 0v"&G<J
* @since 2006-2-2 ?Nl"sVCo
* @version 1.0 A@$fb}CF
*/ iTNqWU-o
public class HeapSort implements SortUtil.Sort{ ?:|YGLaB
U?U(;nSR\A
/* (non-Javadoc) j/<??v4F4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :?r*p>0$
*/ A1,4kqmE
public void sort(int[] data) { g^o_\hp
MaxHeap h=new MaxHeap(); `.k5v7!o
h.init(data); o|287S|$
for(int i=0;i h.remove(); C?QfF{!7
System.arraycopy(h.queue,1,data,0,data.length); t,vTAq.))
} $M]%vG
A"/aGCG0z
private static class MaxHeap{ >7>7/7=O
%9c|%#3
void init(int[] data){ ^)cM&Bxt%
this.queue=new int[data.length+1]; hBCR]=']
for(int i=0;i queue[++size]=data; GMFc K=
fixUp(size); s%dF~DSK
} ehc<|O9tY
} C"T,MH
'}O!2W&Y]%
private int size=0; PF ;YE6
|qL;Nu,d
private int[] queue; FH n,]Tfx
owMuT^x?
public int get() { {qAu/ixp
return queue[1]; tvWH04T
} KHJ=$5r)
mW$ot.I
public void remove() { -iQsi4
SortUtil.swap(queue,1,size--); E0bFx5e5fu
fixDown(1); M5+W$W
} q=[U}{
file://fixdown tq E>Zx=X
private void fixDown(int k) { Q}uG/HI
int j; > I%zd/q?
while ((j = k << 1) <= size) { UIw?;:Y
if (j < size %26amp;%26amp; queue[j] j++; s4IKSX
if (queue[k]>queue[j]) file://不用交换 ip5u_Xj?
break; r|8V @.@i
SortUtil.swap(queue,j,k); !\w\ ]7ls
k = j; @dhH;gt.I
} H5q:z=A
} Nzc>)2% N
private void fixUp(int k) { :Ba-u
while (k > 1) { U5wTGv4S|
int j = k >> 1; jg^^\n
if (queue[j]>queue[k]) mSj76'L#
break; /lUk5g^j
SortUtil.swap(queue,j,k); /Y^7Rl
k = j; 0N1' $K$\
} VEo^ :o)r
} xDe47&qKM
]EX--d<_`
} 7+]F^ 6
y84XoDQ
} 2vXGO|W
uk{J@&F
SortUtil： G+Ei#:W,
;G$)MS'nB
package org.rut.util.algorithm; 9l=Fv6
}moz9a
import org.rut.util.algorithm.support.BubbleSort; &@oq~j_7
import org.rut.util.algorithm.support.HeapSort; bfc.rZ
import org.rut.util.algorithm.support.ImprovedMergeSort; tYI]=:
import org.rut.util.algorithm.support.ImprovedQuickSort; e>(Wvb&4
import org.rut.util.algorithm.support.InsertSort; ?',}?{"c
import org.rut.util.algorithm.support.MergeSort; p d%LL?O
import org.rut.util.algorithm.support.QuickSort; D;yd{]<
import org.rut.util.algorithm.support.SelectionSort; R]fYe#!"
import org.rut.util.algorithm.support.ShellSort; Dpp@*xX>
0kz7 >v
/** f8F1~q
* @author treeroot "x.88,T6
* @since 2006-2-2 S%P3ek>3
* @version 1.0 `w(sXkeaI
*/ cl#OvQ
public class SortUtil { `i{4cT8:
public final static int INSERT = 1; ^"/Dih\_
public final static int BUBBLE = 2; 9/QS0
public final static int SELECTION = 3; GfQ^@Tl
public final static int SHELL = 4; kOzt"t&
public final static int QUICK = 5; 8Y]}Gb!
public final static int IMPROVED_QUICK = 6; 7vdHR\#;$
public final static int MERGE = 7; T7X!#j"\
public final static int IMPROVED_MERGE = 8; iPJ9Gh7
public final static int HEAP = 9; FL~9</
Wpa$B )xg
public static void sort(int[] data) { K-ju,4A
sort(data, IMPROVED_QUICK); Ny[s+2?
} DD)mN) &T
private static String[] name={ Xd5! Ti}
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" !4!S{#<q
}; jm~mhAE#
@b>YkJDk
private static Sort[] impl=new Sort[]{ T[mw}%3<v
new InsertSort(), V=Ww>
new BubbleSort(), fa/P%9db
new SelectionSort(), R0z?)uU#
new ShellSort(), Udg& eEF
new QuickSort(), hu`Lv
new ImprovedQuickSort(), 1@s^$fvW
new MergeSort(), K7y!s :rg!
new ImprovedMergeSort(), D'Jm!Ap
new HeapSort() /"g[Ay
}; f45;fT>
v_[)FN"]Y.
public static String toString(int algorithm){ :tg@HyY)
return name[algorithm-1]; P((S2"D<4
} 1NB2y[
:$+D 2*(
public static void sort(int[] data, int algorithm) { j P{:A9T\
impl[algorithm-1].sort(data); pXGK:ceFu
} []sB^UT
7/[TE
public static interface Sort { [w+yQ7P
public void sort(int[] data); yd{Y}.
} K*J4&5?/
dVjcK/T<
public static void swap(int[] data, int i, int j) { mRg ,A\
int temp = data; \pT^Zhp)
data = data[j]; $l0eI
data[j] = temp; 58a)&s[+
} Ew)n~!s
} H'j_<R N