[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; !{LwX Kf
} PGDlSB^O
int i1=l; R&A.F+Zgt
int i2=mid+1; b/`'?| C
for(int cur=l;cur<=r;cur++){ j|9 2 g
if(i1==mid+1) I1jF`xQ&0
data[cur]=temp[i2++]; Q[^d{e*l
else if(i2>r) bx>D
data[cur]=temp[i1++]; vC1 `m
else if(temp[i1] data[cur]=temp[i1++]; d+;~x*
else ,`b9c=6;
data[cur]=temp[i2++]; #c_ZU\"h"
} ,\b5M`<c
} .#}R$}e+
)1ciO+_
} ~Gza$ K
*np|PyLP:
改进后的归并排序: 'u~use"
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package org.rut.util.algorithm.support; AmHIG_'
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import org.rut.util.algorithm.SortUtil; #Bjnz$KB
Qpc>5p![3
/** D]REZuHOI
* @author treeroot MtljI6
* @since 2006-2-2 5Z'pMkn3
* @version 1.0 BN0))p
*/ |{(ynZ]R
public class ImprovedMergeSort implements SortUtil.Sort { b%6_LK[
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private static final int THRESHOLD = 10; <ZLs+|1
qmGB~N|N
/* 3$TpI5A
* (non-Javadoc) L '=3y$"],
* |ONOF
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }N NyUwFa
*/ tQ"PCm
public void sort(int[] data) { Sk xaSJ"
int[] temp=new int[data.length]; #+$z`C`
mergeSort(data,temp,0,data.length-1); W-MQMHQ
} !Iqyt. .
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private void mergeSort(int[] data, int[] temp, int l, int r) { EW)]75o{QF
int i, j, k; LdcP0G\"VG
int mid = (l + r) / 2; ,fbO}
if (l == r) xYbF76B
return; rBaK$Ut
if ((mid - l) >= THRESHOLD) 6k-]2,\#
mergeSort(data, temp, l, mid); n:{yri+
else gg=z.`}
insertSort(data, l, mid - l + 1); 98l#+4+
if ((r - mid) > THRESHOLD) '`n\YO.N
mergeSort(data, temp, mid + 1, r); ufmFeeg
else lxbZM9A2
insertSort(data, mid + 1, r - mid); zPn8>J<.0Q
zT@vji%Y
for (i = l; i <= mid; i++) { &Ef'5
temp = data; \|kU{d0
} ry:tL0;;e#
for (j = 1; j <= r - mid; j++) { 2ma.zI@^u9
temp[r - j + 1] = data[j + mid]; /dIiFr"e}G
} "qF8'58
int a = temp[l]; `#~@f!';
int b = temp[r]; 7J)-WXk
for (i = l, j = r, k = l; k <= r; k++) { /}V9*mD2
if (a < b) { C]}0h!_V
data[k] = temp[i++]; ]0o78(/w2
a = temp; OF)X(bi4j
} else { fYpy5vc-dm
data[k] = temp[j--]; q^gd1K<N
b = temp[j]; jd#{66:
} @E1N9S?>
} ,MdCeA%`
} 9.<$&mVk7`
]C_6I\Z#=W
/** k5^'b#v
* @param data w1.~N`g$
* @param l rz4S"4
* @param i :E.mU{
*/ *fl1 =Rfr
private void insertSort(int[] data, int start, int len) { !JJY(o
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); "p<f#s}
} r]TeR$NJ
} =fm/l-P@
} Mv_4*xVc
} 0&<{o!>k
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堆排序： 3?C$Tl2G8
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package org.rut.util.algorithm.support; qRNGe8
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import org.rut.util.algorithm.SortUtil; "w N DjWv
!r$/-8b
/** oo`mVRVf
* @author treeroot R5Ti|k.~Y"
* @since 2006-2-2 KY@k4S+
* @version 1.0 o4d>c{p
*/ )x]/b=m
public class HeapSort implements SortUtil.Sort{ /Z-|E
'M&`l%dIPf
/* (non-Javadoc) ?=aQG0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) g=b'T-
*/ W;2y.2*
public void sort(int[] data) { (ue;O~
MaxHeap h=new MaxHeap(); (xMAo;s_
h.init(data); 'Kl} y,
for(int i=0;i h.remove(); 7z`)1^M
System.arraycopy(h.queue,1,data,0,data.length); a93Aj
} (g5T2(_6L
6ZX{K1_q
private static class MaxHeap{ d^4!=^HN
8g$pfHt|e
void init(int[] data){ :0r@o:H
this.queue=new int[data.length+1]; gmt`_Dpm$
for(int i=0;i queue[++size]=data; Tk)y*y
fixUp(size); pX"f "
} .^uNzN~
} k: D<Q
po!0j+r3
private int size=0; L\!Pa+Iod
OF!(BJL
private int[] queue; }{HlY?S
e_7a9:2e
public int get() { Ymx/N+Jl
return queue[1]; G$WMW@fy
} VP5_Y1e7
(;\JCeGA
public void remove() { !Vy/-N
SortUtil.swap(queue,1,size--); 7N 7W0Ky
fixDown(1); L -<!,CASW
} ZxY%x/K
file://fixdown Ee^2stc-
private void fixDown(int k) { XXvM*"3D5
int j; 1ih|b8)Dn
while ((j = k << 1) <= size) { 7iT#dpF/A
if (j < size %26amp;%26amp; queue[j] j++; ]v$VZ'
if (queue[k]>queue[j]) file://不用交换 eWE7>kwh
break; 624l5}@:
SortUtil.swap(queue,j,k); ELPzqBI
k = j; 5!-'~W
} w_PnEJa9
} ^_n(>$ EK
private void fixUp(int k) { B/AS|i] sM
while (k > 1) { >,7-cm=.
int j = k >> 1; ,x&T8o/a
if (queue[j]>queue[k]) #,lJ>mTe4
break; [s"xOP9R
SortUtil.swap(queue,j,k); ;5MI8
k = j; i1}Y;mj
} 274F+X
} ?31#:Mg6g+
7 wH9w
} /c6:B5G
^|gD;OED7O
} Sjv_% C$
M*$#j|
SortUtil： \$$DM"+:;H
) 7w%\i{M
package org.rut.util.algorithm; !o1+#DL)MU
rUmaKh?v|X
import org.rut.util.algorithm.support.BubbleSort; !E#FzY!}Pl
import org.rut.util.algorithm.support.HeapSort; [2ez"4e
import org.rut.util.algorithm.support.ImprovedMergeSort; Ia %> c
import org.rut.util.algorithm.support.ImprovedQuickSort; "w7wd5h
import org.rut.util.algorithm.support.InsertSort; C/_Z9LL?F
import org.rut.util.algorithm.support.MergeSort; ?)X0l
import org.rut.util.algorithm.support.QuickSort; Lk#8G>U
import org.rut.util.algorithm.support.SelectionSort; "V'<dn
import org.rut.util.algorithm.support.ShellSort; B OKY X
*:}9(8d
/** K!g!tA$
* @author treeroot $MhfGMk!'
* @since 2006-2-2 Z4KYVHD,
* @version 1.0 n%X5TJE
*/ G LU7?2`t
public class SortUtil { ';'gKX!9V
public final static int INSERT = 1; }6b" JoC
public final static int BUBBLE = 2; j2^Vz{
public final static int SELECTION = 3; N.(wR
public final static int SHELL = 4; -Ph"#R&
public final static int QUICK = 5; bS7%%8C
public final static int IMPROVED_QUICK = 6; @?e+;Sx
public final static int MERGE = 7; k}18 ~cWM
public final static int IMPROVED_MERGE = 8; NAgm?d
public final static int HEAP = 9; ecvQEK2L
;iq H:wO
public static void sort(int[] data) { {0?^$R8j
sort(data, IMPROVED_QUICK); \3q Z0
} a!guZUg6
private static String[] name={ jJbS{1z
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" D6N32q@
}; AO[/-Uij
=/kwUjC?
private static Sort[] impl=new Sort[]{ S3Dmc\f
new InsertSort(), h\-3Y U
new BubbleSort(), 46[k9T
new SelectionSort(), JIL(\d
new ShellSort(), q!f'?yFYK
new QuickSort(), GBSuTu8
new ImprovedQuickSort(), l\tg.O~
new MergeSort(), yVfF *nG
new ImprovedMergeSort(), vb.}SG>
new HeapSort() }-/oL+j
}; 0(qtn9;=2
0fE?(0pBj
public static String toString(int algorithm){ !KC4[;Y
return name[algorithm-1]; ,B2p\
} Q{=DLm`
_D"V^4^yqu
public static void sort(int[] data, int algorithm) { tXfXuHa
impl[algorithm-1].sort(data); JIatRc?g
} !(A<
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public static interface Sort { ,76Q*p
public void sort(int[] data); ^i[bo3
} ,4mb05w;d
F rd>+
public static void swap(int[] data, int i, int j) { tfIUH'Ez>
int temp = data; /JjSx/
data = data[j]; '+&!;Jj,
data[j] = temp; xcE2hK/+
} cB0"vbdO
} -J":'xCP!