[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; -3y $j+
} a63Ud<_a7
int i1=l; 01%0u8U
int i2=mid+1; gHWsKE %
for(int cur=l;cur<=r;cur++){ mI;\ UOh'
if(i1==mid+1) NeewV=[%
data[cur]=temp[i2++]; (I1^nrDP.
else if(i2>r) 1:I _;O_
data[cur]=temp[i1++]; b^P\Kky
else if(temp[i1] data[cur]=temp[i1++]; Ob|tA
else Q'^$;X~-<
data[cur]=temp[i2++]; $D*Yhv!/
} [XA:pj;rg'
} vcOw`oS
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} cdL0<J b,
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改进后的归并排序: &c= 3BEh
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package org.rut.util.algorithm.support; cm>+f^4?n
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import org.rut.util.algorithm.SortUtil; ge{%B~x
j W-K
/** clT[?8*
* @author treeroot HNX/#?3
* @since 2006-2-2 [hiV#
* @version 1.0 3HndE~_C&
*/ lp1GK/!s
public class ImprovedMergeSort implements SortUtil.Sort { wr6(C:
WsmP]i^Q
private static final int THRESHOLD = 10; 8/|1FI
R8j\CiV17
/* +DSZ(Zb4qY
* (non-Javadoc) pf&SIG
* xwijCFI*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) '^:q|h
*/ [5P1 pkZ
public void sort(int[] data) { &:=[\Ws R
int[] temp=new int[data.length]; ~2XiKY;W?
mergeSort(data,temp,0,data.length-1); 9@ ^*\s
} X/S%0AwZ
,Mn?h\
private void mergeSort(int[] data, int[] temp, int l, int r) { 2cv=7!K4Uv
int i, j, k; 5pxw[c53#
int mid = (l + r) / 2; ~/Kqkhq+c
if (l == r) 2&<&q J
return; 6?l|MU"Q.
if ((mid - l) >= THRESHOLD) ~:UAL}b{\~
mergeSort(data, temp, l, mid); ~=Fp0l)#
else Rdy-6
insertSort(data, l, mid - l + 1); Ke\FzZ]
if ((r - mid) > THRESHOLD) U]iZ3^8VT
mergeSort(data, temp, mid + 1, r); W=!D[G R
else 5e c T.
insertSort(data, mid + 1, r - mid); 6"o@d8>v
)!l1
for (i = l; i <= mid; i++) { ]~'pYOB
temp = data; -$f$z(h
} G>+iisb%
for (j = 1; j <= r - mid; j++) { 11-?M
temp[r - j + 1] = data[j + mid]; |+aD%'|
} w`>g^_xsg
int a = temp[l]; S\A9r!2
int b = temp[r]; tfd!;`B
for (i = l, j = r, k = l; k <= r; k++) { 212
if (a < b) { YM +4:P2
data[k] = temp[i++]; D^H4]7wG@
a = temp; SrvC34<7
} else { }vX/55
data[k] = temp[j--]; n'<F'1SWv
b = temp[j]; b5UIX Kim
} g;</|Z
} pIvr*UzY
} {9h`h08?z
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/** yJHFo[wGMJ
* @param data (!diPwcv
* @param l D~f[Rg
* @param i (fC U+
*/ h_xzqElZu
private void insertSort(int[] data, int start, int len) { FmtV[C#
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 5[rA>g~
} M}!E :bv'
} S>EO6z#
} j:J7
} 0/b3]{skK
G\H|\i
堆排序： K]Z];C#)
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package org.rut.util.algorithm.support; xayd_RB9
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import org.rut.util.algorithm.SortUtil; TM`6:5ONv
w?A6S-z
/** p!p:LSk"/b
* @author treeroot ,Zs*07!$f
* @since 2006-2-2 4k=LVu]Kcr
* @version 1.0 43o!Vr/S
*/ Gq;!g(
public class HeapSort implements SortUtil.Sort{ tp3 !6I6
Z oQPvs7_
/* (non-Javadoc) G:!'hadw
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :LX (9f
*/ [|oOP$u
public void sort(int[] data) { JCZ5q9b
MaxHeap h=new MaxHeap(); kk7M$)>d
h.init(data); E'F87P^>
for(int i=0;i h.remove(); HmVpxD+
System.arraycopy(h.queue,1,data,0,data.length); s7na!A[
} oD7^9=#
_[ufH*
private static class MaxHeap{ >$N ?\\#
sGFC?1r?\
void init(int[] data){ OA8iTn
this.queue=new int[data.length+1]; aX(Y `g)|
for(int i=0;i queue[++size]=data; OW1\@CC-69
fixUp(size); OmC F8:\/
} rsC^Re:*jr
} f-a+&DB9
{t QZqqdn@
private int size=0; 5jK9cF$>
v L!?4k
private int[] queue; f!+G1z}iA
]sV) '-
public int get() { CC{{@
return queue[1]; ev%}\^Vl[
} 8/+x1,S%
aj@<4A=;
public void remove() { K6@9=_A
SortUtil.swap(queue,1,size--); 'mU7N<Q$qQ
fixDown(1); ,L9ioYbp
} C:<TJ
file://fixdown *WZ?C|6+
private void fixDown(int k) { (eF "[,z
int j; s N|7
while ((j = k << 1) <= size) { ~<Sb:Izld
if (j < size %26amp;%26amp; queue[j] j++; szU_,.\
if (queue[k]>queue[j]) file://不用交换 ZH8Oidj`
break; x"n)y1y
SortUtil.swap(queue,j,k); &{H LYxh
k = j; <&p0:S7
} _q1E4z
} @}iY(-V
private void fixUp(int k) { B>,&{ah/5J
while (k > 1) { Fd/.\s
int j = k >> 1; wA7^
if (queue[j]>queue[k]) %LeZd}v
break; Jx4"~ 4
SortUtil.swap(queue,j,k); %tJ@)
k = j; !O*uQB
} xE%sPWbj
} )NL_))\
$WHmG!)*
} B0eKj=y;
qB44;!(
} Z2hIoCT
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SortUtil： (b>B6W\&
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package org.rut.util.algorithm; Ob>M]udn
hTK6N
import org.rut.util.algorithm.support.BubbleSort; M|uWSG
import org.rut.util.algorithm.support.HeapSort; /$?7L(
import org.rut.util.algorithm.support.ImprovedMergeSort; %:hU:+G E
import org.rut.util.algorithm.support.ImprovedQuickSort; v\b@;H`
import org.rut.util.algorithm.support.InsertSort; ,T\)%q
import org.rut.util.algorithm.support.MergeSort; 5t-dvYgU
import org.rut.util.algorithm.support.QuickSort; mnS F=l;;
import org.rut.util.algorithm.support.SelectionSort; sDzlNMr?P+
import org.rut.util.algorithm.support.ShellSort; BP`'1Ns
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/** PcK;L(
* @author treeroot 4J6,_8`U
* @since 2006-2-2 %$H~
* @version 1.0 ~AbTbQ3
*/ leomm+f^
public class SortUtil { ej&ZE n
public final static int INSERT = 1; La#otuw+?
public final static int BUBBLE = 2; STY\c5
public final static int SELECTION = 3; :r,o-D
public final static int SHELL = 4; `' "125T
public final static int QUICK = 5; ^t#W?rxp&
public final static int IMPROVED_QUICK = 6; !%s&GD8&l
public final static int MERGE = 7; {Wp5Ane
public final static int IMPROVED_MERGE = 8; $MB/j6#j
public final static int HEAP = 9; huw|J<$
wc.T;(
public static void sort(int[] data) { H|i39XV
sort(data, IMPROVED_QUICK); J_ S]jE{
} ?,0 5!]
private static String[] name={ An0Zg'o!G
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" OD\F*Ry~
}; SBynu
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private static Sort[] impl=new Sort[]{ 3iC$ "9!p
new InsertSort(), $X%'je
new BubbleSort(), i`)h~V|G
new SelectionSort(), ~i ImM|*0
new ShellSort(), g8^YDrH
new QuickSort(), ,Kw]V %xOb
new ImprovedQuickSort(), BqA
new MergeSort(), 2AK]x`GY
new ImprovedMergeSort(), Gcz@z1a=n
new HeapSort() 4OOH 3O
}; tjIT4
Yf=Puy}q
public static String toString(int algorithm){ 3Sb'){.MT+
return name[algorithm-1]; , e6}p
} ]-b`uYb
Q7vTTn\
public static void sort(int[] data, int algorithm) { cXY;Tw45
impl[algorithm-1].sort(data); cun&'JOH?U
} /degBL+
<B%s9Zy
public static interface Sort { =Pu;wx9
public void sort(int[] data); xOAA1#
} ~$\9T.tre2
;5(ptXX1W
public static void swap(int[] data, int i, int j) { 8vL2<VT;
int temp = data; /PuN+M
data = data[j]; SlRQi:
data[j] = temp; cB ,l=/?
} vm y?8E6+
} 2GRdfX