[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; DPlmrN9@=
} ENZYrWl
int i1=l; 69``j{Z+
int i2=mid+1; v*@R U
for(int cur=l;cur<=r;cur++){ %wmbFj}
if(i1==mid+1) J~5+=V7OV
data[cur]=temp[i2++]; 4~0@(3
else if(i2>r) $4>x4*
data[cur]=temp[i1++]; '&iAPc4=
else if(temp[i1] data[cur]=temp[i1++]; %uy?@e
else }vX/55
data[cur]=temp[i2++]; X}]g;|~SN
} ]nx5E_j2
} lT F#efcW
yJHFo[wGMJ
} I- WR6s=
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改进后的归并排序: NS^+n4
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package org.rut.util.algorithm.support; 6w$pL(
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import org.rut.util.algorithm.SortUtil; LhtA]z,m
G/_9!lE
/** |F?/L>
* @author treeroot {'q(a4
* @since 2006-2-2 -f%J_`
* @version 1.0 rPoq~p[Y
*/ sFonc
public class ImprovedMergeSort implements SortUtil.Sort { "I&,':O+
;cW9NS3:
private static final int THRESHOLD = 10; #~;:i
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/* q `^5<
* (non-Javadoc) 5,K*IH
* \PgMMc4'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) t,R4q*
*/ #P-T4R
public void sort(int[] data) { aX(Y `g)|
int[] temp=new int[data.length]; LP5@ID2G
mergeSort(data,temp,0,data.length-1); s%S; 9T
} 9i/VvW
`ouCQ]tKz
private void mergeSort(int[] data, int[] temp, int l, int r) { dp#'~[j
int i, j, k; {x/)S*:Z
int mid = (l + r) / 2; kU[#. y=%p
if (l == r) jL9to6 Hmr
return; C:<TJ
if ((mid - l) >= THRESHOLD) IRB BLXv7\
mergeSort(data, temp, l, mid); zUd{9B$
else \tZZn~ex
insertSort(data, l, mid - l + 1); p+O,C{^f
if ((r - mid) > THRESHOLD) ]R8JBnA
mergeSort(data, temp, mid + 1, r); '"o&BmF
else !Di*y$`}b
insertSort(data, mid + 1, r - mid); 29AWg(9?aS
#a=~a=c(^
for (i = l; i <= mid; i++) { D0a3%LBS/2
temp = data; xO2CgqEb
} !_#2$J*s^D
for (j = 1; j <= r - mid; j++) { oV Hh
temp[r - j + 1] = data[j + mid]; [_wenlkm
} ?PST.+l
int a = temp[l]; -x0VvkHu
int b = temp[r]; m(?ZNtBQt
for (i = l, j = r, k = l; k <= r; k++) { ,CA3Q.y>|
if (a < b) { 7z^\}&
data[k] = temp[i++]; NoG`J$D
a = temp; h,%b>JFo
} else { yi$Jk}w
data[k] = temp[j--]; etkKVr;Kv
b = temp[j]; :r,o-D
} Vv3{jn6%
} vgvJ6$#
} @#= ail
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/** v<c@bDZ>
* @param data An0Zg'o!G
* @param l 1hnw+T<<W
* @param i tV5Uz&:b
*/ F1aI4H<(T
private void insertSort(int[] data, int start, int len) { KaGG4?=V
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ^~Dmb2h
} :`w'}h7m
} a= *qsgPGL
} Yf=Puy}q
} nNJMQb'K
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堆排序： A:-r2;xB
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package org.rut.util.algorithm.support; :xz,PeXo7
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import org.rut.util.algorithm.SortUtil; sa26u`?
8vL2<VT;
/** ,m)k;co^
* @author treeroot -lNq.pp3-$
* @since 2006-2-2 9< $n'g
* @version 1.0 ~& @UH
*/ GV"HkE;
public class HeapSort implements SortUtil.Sort{ Xbp~cn
[G/ti&Od^
/* (non-Javadoc) dvl'Sq<
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [_pw|BGp
*/ hhU: nw
public void sort(int[] data) { ".Q``d&X
MaxHeap h=new MaxHeap(); Z&VH7gi
h.init(data); E1&9( L5
for(int i=0;i h.remove(); %gb4(~E+N
System.arraycopy(h.queue,1,data,0,data.length); *49lM;
} 3?+CP-T-j
N#Y|MfLc
private static class MaxHeap{ =5v=<, ]
Mt93YD-2+
void init(int[] data){ yDil
this.queue=new int[data.length+1]; ls928
for(int i=0;i queue[++size]=data; 7`c\~_Df_
fixUp(size); qZS]eQW.
} -szSA
} |*T3TsP u
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private int size=0; 7%Q?BH7{
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private int[] queue; l[AQyR1+/
-*<4 hFb
public int get() { 1[g -f,
return queue[1]; L^{1dVGWNa
} `u't
;Eer
public void remove() { 6VsgZ"Il
SortUtil.swap(queue,1,size--); `Q@w*ta)
fixDown(1); `Nnaw+<]
} pXy'Ss@y
file://fixdown 0'3f^Ajf
private void fixDown(int k) { KmYSYNr@,
int j; 2:6W_[7l!
while ((j = k << 1) <= size) { l:i&l?>_
if (j < size %26amp;%26amp; queue[j] j++; S <RbC
if (queue[k]>queue[j]) file://不用交换 T@4R|P&{)
break; %2;Nj; J$
SortUtil.swap(queue,j,k); +I$,Y~&`>
k = j; %tvP\(]h
} 'e(]woe
} ~Oc:b>~
private void fixUp(int k) { 3i;sB
while (k > 1) { `B A'a" $
int j = k >> 1; LJc"T)>$`
if (queue[j]>queue[k]) @fc-[pv
break; q^w@l
SortUtil.swap(queue,j,k); RDSkFK( D
k = j; x<'<E@jpU;
} {M^BY,%*
} T2ZB(B D
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} LsI8T uv
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} T\wfYuc&X
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SortUtil： E Xxv
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package org.rut.util.algorithm; YZk.{#^c
xjy(f~'
import org.rut.util.algorithm.support.BubbleSort; W;T5[
import org.rut.util.algorithm.support.HeapSort; "}x%5/(
import org.rut.util.algorithm.support.ImprovedMergeSort; S?[@/35)
import org.rut.util.algorithm.support.ImprovedQuickSort; _M) G
import org.rut.util.algorithm.support.InsertSort; x:6c@2
import org.rut.util.algorithm.support.MergeSort; %xv*#.<Vj
import org.rut.util.algorithm.support.QuickSort; 3`TD>6rs
import org.rut.util.algorithm.support.SelectionSort; T'> MXFLh
import org.rut.util.algorithm.support.ShellSort; {[)n<.n[g
CUN1.i<pk8
/** i*((@:
* @author treeroot TjE'X2/
* @since 2006-2-2 NZ"nG<;5
* @version 1.0 E1`TQA
*/ Am!OLGG4
public class SortUtil { \c}pzBFd
public final static int INSERT = 1; \iP5.3C
public final static int BUBBLE = 2; U,K=(I7OBX
public final static int SELECTION = 3; q5G`q&O5
public final static int SHELL = 4; fKW)h?.Kd
public final static int QUICK = 5; bXi!_'z$
public final static int IMPROVED_QUICK = 6; ,`bmue5
public final static int MERGE = 7; $MIDCZ@-
public final static int IMPROVED_MERGE = 8; 9:P$'y?
public final static int HEAP = 9; aJQzM
2){O&8A
public static void sort(int[] data) { n?778Wo}
sort(data, IMPROVED_QUICK); )Dp0swJ
} IZLBv2m
private static String[] name={ Z(t7QFd
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" r )HZaq
}; U&ytZ7iB
UM/!dt}DnF
private static Sort[] impl=new Sort[]{ I^nDO\m <
new InsertSort(), +n<W#O%
new BubbleSort(), wB bCGU
new SelectionSort(), wn;)La
new ShellSort(), T 5F)
new QuickSort(), mPhu#oK'f
new ImprovedQuickSort(), T%;V_iW-
new MergeSort(), _RIlGs\.
new ImprovedMergeSort(), ap8q`a{j^
new HeapSort() I(Z\$
}; YS#*#!ZMn?
yVp,)T9
public static String toString(int algorithm){ ?;_*8Doq-a
return name[algorithm-1]; L+*:VP6WD
} e=l:!E10
'zbvg0T
public static void sort(int[] data, int algorithm) { ?%[~J
impl[algorithm-1].sort(data); yVgC1-8i*
} R*!s'R
DR{O.TX
public static interface Sort { @TQ/Z$y
public void sort(int[] data); MI'"Xzp{s
} 0QT:@v2R
ALy7D*Z]w
public static void swap(int[] data, int i, int j) { + c+i u6+"
int temp = data; k qL.ZR
data = data[j]; 14"57Jt8
data[j] = temp; l=b!O
} K2yu}F^}
} ,:e~aG,B