[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; 3X0^xUA6
} * _C6.%{
int i1=l; ,0<|&D
int i2=mid+1; QEUg=*3W=
for(int cur=l;cur<=r;cur++){ }5OlX
if(i1==mid+1) ,a$LT
data[cur]=temp[i2++]; 4s`*o/it
else if(i2>r) 3z&,>CEX
data[cur]=temp[i1++]; Zi7(lG
else if(temp[i1] data[cur]=temp[i1++]; d7Q. 'cyQ
else "5XD+qi
data[cur]=temp[i2++]; ,n &|+&
} 4x8mJ4[H^
} I$qL=
JEY%(UR8
} sF_.9G)S0
_}jj>+zA`
改进后的归并排序: Gpe h#Q4x
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package org.rut.util.algorithm.support; ?ZlwRjB\
mg'-]>$$]
import org.rut.util.algorithm.SortUtil; 3zWY%(8t4?
_PNU*E%s<
/** LdWeI
* @author treeroot /;HytFP
* @since 2006-2-2 3h0w8(k;
* @version 1.0 aH"tSgi
*/ 0%FC;v0
public class ImprovedMergeSort implements SortUtil.Sort { ?\$77k
s.zH.q,
private static final int THRESHOLD = 10; F\-qXSA
^N Et{]x
/* ]o,)#/' $
* (non-Javadoc) qcQ`WU{
* X:8=jHkz
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ( }JX ]-
*/ 22tY%Y9
public void sort(int[] data) { 6EX:qp^`
int[] temp=new int[data.length]; BAoqO Xv
mergeSort(data,temp,0,data.length-1); ?H*_:?=6
} z_JZx]*/
s)/i_Oe$\
private void mergeSort(int[] data, int[] temp, int l, int r) { ,Hys9I
int i, j, k; Qg9{<0{u
int mid = (l + r) / 2; ~Gwn||g78
if (l == r) zKfb
return; rQisk8%
if ((mid - l) >= THRESHOLD) '|Q=J)
mergeSort(data, temp, l, mid); 0C3Yina9 *
else 'ARQ7 Q[`
insertSort(data, l, mid - l + 1); cO(|>&tJ
if ((r - mid) > THRESHOLD) =N7N=xY
mergeSort(data, temp, mid + 1, r); +#&2*nY
else )}WG`
insertSort(data, mid + 1, r - mid); wy) Frg
%HYC-TF#
for (i = l; i <= mid; i++) { I &{dan2
temp = data; ZP%^.wxC
} 5^* d4[&+
for (j = 1; j <= r - mid; j++) { X/gh>MJJ<
temp[r - j + 1] = data[j + mid]; ",Q\A I
} !EpP-bq'*
int a = temp[l]; Grjm9tbX}
int b = temp[r]; d8]6<\g
for (i = l, j = r, k = l; k <= r; k++) { 6"_FjS3Sl
if (a < b) { o`RTvGXk
data[k] = temp[i++]; l[\[)X3$
a = temp; 0dIJgKanGP
} else { |&RdOjw$u
data[k] = temp[j--]; ,3fw"P$
b = temp[j]; m?<C\&)6x
} |dX#4Mq^,
} FpW{=4yk
} L]HY*e
xZ,g6s2o
/** uE5kL{Fv
* @param data EWqKd/
* @param l hrcR"OZ~X
* @param i ?c>j^}A/N
*/ d>vGx
private void insertSort(int[] data, int start, int len) { H,H'bd/
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Q`19YX
} eKStt|M'
} 5vP*oD
} cp.)K!$
} <'GI<Hc
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堆排序： N@j|I* y|
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package org.rut.util.algorithm.support; 1L &_3}
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import org.rut.util.algorithm.SortUtil; /3+7a\|mKr
$orhY D3gv
/** hsfVKlw-
* @author treeroot 1RcaE!\p
* @since 2006-2-2 ?"sk"{
* @version 1.0 rvr Ok
*/ dnNc,l&g
public class HeapSort implements SortUtil.Sort{ UTs0=:+,t
-} Z
/* (non-Javadoc) pOS.`rSK
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~9'VP}\
*/ z@iY(;Qo
public void sort(int[] data) { B~~rLo:a
MaxHeap h=new MaxHeap(); oPWvZI(\&
h.init(data); .[O*bk
for(int i=0;i h.remove(); T+2?u.{I
System.arraycopy(h.queue,1,data,0,data.length); =AR'Pad
} *5|\if\
#Va@4<4r
private static class MaxHeap{ :&TOQ<vM
XM8C{I1
void init(int[] data){ im1]:kr7
this.queue=new int[data.length+1]; I{1w8m4O6
for(int i=0;i queue[++size]=data; g~Q#U;]
fixUp(size); pu`|HaQaE
} 2V F|T'h
} y f+/Kj< a
]Fjz+CGg
private int size=0; 9"<)DS
o.k#|q
private int[] queue; tk, HvE
0Y"==g+>f
public int get() { pK$^@~DE
return queue[1]; tnKzg21%
} OwDjUKeN
L{5zA5#m
public void remove() { M(/%w"R
SortUtil.swap(queue,1,size--); B>~E6j7[Mp
fixDown(1); nTYqZlI,
} }-8K*A3
file://fixdown XPX{c|]>.
private void fixDown(int k) { IlS{>6
int j; |4-Ey! P
while ((j = k << 1) <= size) { m0\(a_0V
if (j < size %26amp;%26amp; queue[j] j++; qe\j$Cjy
if (queue[k]>queue[j]) file://不用交换 Wxp^*._q3I
break; VMtR4!:q
SortUtil.swap(queue,j,k); k,q` ^E8k
k = j; O gycP4z[
} ~8|$KD4I
} &O!d!Pf
private void fixUp(int k) { gw5CU)r4$
while (k > 1) { S9xC> |<
int j = k >> 1; r{Fu|aoa;5
if (queue[j]>queue[k]) qLPI^g,
break; } 10Dvt>+
SortUtil.swap(queue,j,k); wePMBL1P*
k = j; w|$;$a7)
} l sUQ7%f
} oM< &4F
~%sDQt\S
} {~d4;ht1Y
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} Q0M8}
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SortUtil： guf+AVPno
@o>2:D1G
package org.rut.util.algorithm; $Y ]*v)}X
qnT:x{o
import org.rut.util.algorithm.support.BubbleSort; NP|U |zn
import org.rut.util.algorithm.support.HeapSort; @Yt[%tOF+
import org.rut.util.algorithm.support.ImprovedMergeSort; Lp{l&-uQ
import org.rut.util.algorithm.support.ImprovedQuickSort; ,',fO?Qv'
import org.rut.util.algorithm.support.InsertSort; "w|GIjE+
import org.rut.util.algorithm.support.MergeSort; .>H7i`1D`
import org.rut.util.algorithm.support.QuickSort; `#9ZP
import org.rut.util.algorithm.support.SelectionSort; UkeW2l`:
import org.rut.util.algorithm.support.ShellSort; )_f "[m%
wdp4-*
/** XSZW9/I-(|
* @author treeroot ]bX.w/=
* @since 2006-2-2 ^ *m;![$[
* @version 1.0 8 A2k-X,
*/ 6i&WF<%D
public class SortUtil { w+ _'BU1#
public final static int INSERT = 1; )b5MP1H
public final static int BUBBLE = 2; a0.)zgWr
public final static int SELECTION = 3; Lx(Y=
public final static int SHELL = 4; >\VZ9bP<
public final static int QUICK = 5; ,"*[T\u
public final static int IMPROVED_QUICK = 6; N!btj,vx
public final static int MERGE = 7; &;C|=8eB
public final static int IMPROVED_MERGE = 8; WRD^S:`BH
public final static int HEAP = 9; ;1F3.ibE
`)SkA?yKI
public static void sort(int[] data) { m2\ZnC
sort(data, IMPROVED_QUICK); (+T|B E3*#
} b%pLjvU
private static String[] name={ EP{y?+E2
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 0R*!o\y
}; ~/gqXT">
q?\3m3GM
private static Sort[] impl=new Sort[]{ ~9x$tb x-
new InsertSort(), "9R3S[
new BubbleSort(), ="Dmfy7
new SelectionSort(), n {^D_S
new ShellSort(), ;2&(]1X
new QuickSort(), $'kIo*cZ
new ImprovedQuickSort(), i) :Q{[D
new MergeSort(), +}*]9nG
new ImprovedMergeSort(), 6``!DMDt/P
new HeapSort() YZ'gd10T
}; NlWIb2,
\}G/F!
public static String toString(int algorithm){ B;_M52-B
return name[algorithm-1]; .K:>`~<)
} G$`/86A)
4.R >mN[
public static void sort(int[] data, int algorithm) { &~uzu{
impl[algorithm-1].sort(data); K{"(|~=U
} wYNh0QlBH
].`i`.T
public static interface Sort { N"FQMxqm
public void sort(int[] data); &K|CH? D
} Qs</.PO
[ tmJ6^s
public static void swap(int[] data, int i, int j) { Jfo#IRC
int temp = data; *`mwm:4
data = data[j]; R%54!f0 %
data[j] = temp; 2sWM(SN
} 7pr@aA"vgj
} * 496"kU