[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; iIA&\'|;i
} M-"%4^8_
int i1=l; jBarYg
int i2=mid+1; Hj$JXo[U
for(int cur=l;cur<=r;cur++){ 0vt?yD
if(i1==mid+1) G2zfdgW${/
data[cur]=temp[i2++]; U,~\}$<I
else if(i2>r) [C9->`(`
data[cur]=temp[i1++]; h /@G[5E
else if(temp[i1] data[cur]=temp[i1++]; tJ i#bg%
else E9YR *P4$
data[cur]=temp[i2++]; VW$Hzx_z
} +r"{$'{^
} 8|OsVIe%
pMKnA.|
} ^ ,d!K2`
w:#yu
改进后的归并排序: kW3V"twx
#\_N-bVu
package org.rut.util.algorithm.support; a4Fe MCvV9
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import org.rut.util.algorithm.SortUtil; lqTTTk
y}FTLX $
/** xJ:15eDC
* @author treeroot >A;Mf*E
* @since 2006-2-2 m?V4r#t
* @version 1.0 bF0y`
*/ 4%0eX]
public class ImprovedMergeSort implements SortUtil.Sort { 4U*J{''L
W MU9tq[
private static final int THRESHOLD = 10; !MOVv\@O
hjtkq.@
/* #qtAFIm'
* (non-Javadoc) a4Qr\"Qm
* ]<V[H
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~DPjTR
*/ yO;r]`j0
public void sort(int[] data) { {m.l{<H
int[] temp=new int[data.length]; $h"tg9L^)
mergeSort(data,temp,0,data.length-1); ?~Fk_#jz,@
} 6-c3v
\!Cix}}1
private void mergeSort(int[] data, int[] temp, int l, int r) { Gt3V}"B3\
int i, j, k; DpI)qg#>V
int mid = (l + r) / 2; m-dyvW+
if (l == r) AK]{^Hvz
return; ) wtVFG
if ((mid - l) >= THRESHOLD) >7[. {Y
mergeSort(data, temp, l, mid); ;Kob]b
else 01uMbtM
insertSort(data, l, mid - l + 1); Y?a*-"
if ((r - mid) > THRESHOLD) wC+_S*M-K
mergeSort(data, temp, mid + 1, r); $6kVhE!;
else $vlq]6V8
insertSort(data, mid + 1, r - mid); PGF=q|j9K
*7u~`
for (i = l; i <= mid; i++) { _~ZNX+4
temp = data; /7/d u[P6
} OXd617
for (j = 1; j <= r - mid; j++) { B2w\
temp[r - j + 1] = data[j + mid]; -!f)P=S
} "l&=a1l
int a = temp[l]; 8QDs4Bv|
int b = temp[r]; U` uP^
for (i = l, j = r, k = l; k <= r; k++) { r BQFC4L
if (a < b) { $hZb<Xz
data[k] = temp[i++]; sEP-jEuwG
a = temp; fl#gWAM
} else { (Z;;v|F.i=
data[k] = temp[j--]; <5X?6*Qvr
b = temp[j]; r~&"D#)sy
} #; CC"
} >>oR@
} #9M6 q
YNyaz\L
/** veIR)i@dx
* @param data V3DXoRE-8i
* @param l pLjet~2}iJ
* @param i v10p]=HmO
*/ _H@Y%"ZHJ6
private void insertSort(int[] data, int start, int len) { 5N<f\W,
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 78zjC6}`
} (hWr!(>C4]
} v6(Yz[
} 5G"LuA
} +RWP;rk
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堆排序： qDHiyg^u
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package org.rut.util.algorithm.support; cVya~ *
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import org.rut.util.algorithm.SortUtil; G|MjKe4}
H'7AIY}
/** .@KpN*`KH
* @author treeroot golr,+LSo
* @since 2006-2-2 {@, } M
* @version 1.0 Ww-%s9N<
*/ 9c9FC
public class HeapSort implements SortUtil.Sort{ BNns#Q8a
*W aL}i(P1
/* (non-Javadoc) GO0Spf_Gh
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) AT Dm$ *
*/ U ?'$E\
public void sort(int[] data) { E`s9SE
MaxHeap h=new MaxHeap(); 3jR,lEJyj
h.init(data); {,EOSta
for(int i=0;i h.remove(); l,AK
System.arraycopy(h.queue,1,data,0,data.length); DY1?37h
} jyQBx
;Yo9e~
private static class MaxHeap{ wgfy; #
2r;^OWwr?
void init(int[] data){ 1&N|k;#QS
this.queue=new int[data.length+1]; :&:IZkO
for(int i=0;i queue[++size]=data; ;]YQWK
fixUp(size); F[m"eEX
} oz $T.
} juOOD
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private int size=0; i\hH .7G1
f[v~U<\R
private int[] queue; R-nC+)^
uMOm<kn
public int get() { %SORs(4
return queue[1]; 7 +A-S9P)
} )P4#P2
Vfew )]I
public void remove() { D~_|`D5WK
SortUtil.swap(queue,1,size--); `s74g0h
fixDown(1); kB_uU !G
} ]=ar&1}J
file://fixdown .C=&`;Vs
private void fixDown(int k) { 3&i8C,u]/O
int j; obWBX'
while ((j = k << 1) <= size) { St/<\Y,wr
if (j < size %26amp;%26amp; queue[j] j++; {6MLbL{
if (queue[k]>queue[j]) file://不用交换 /?X1>A:*
break; X&qRanOP;z
SortUtil.swap(queue,j,k); JmN,:bI
k = j; w6tb vhcmU
} jRIjFn|~{Y
} pl62mp!
private void fixUp(int k) { [XFZ2'OO
while (k > 1) { x" 21 Jh
int j = k >> 1; }gi>Z
if (queue[j]>queue[k]) !M:m(6E1
break; #6{"cr6l
SortUtil.swap(queue,j,k); il^SGH
k = j; E.W7`zl
} tV2SX7N
} o?A/
5wXe^G
} .&2pZ
+kCVi
} W"9iFj X
N{n}]Js1D-
SortUtil： 6_/oVvd
!ZP1?l30
package org.rut.util.algorithm; v8g3]MVj3
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import org.rut.util.algorithm.support.BubbleSort; L^PZ\OC
import org.rut.util.algorithm.support.HeapSort; q|m8G
import org.rut.util.algorithm.support.ImprovedMergeSort; 9R.IYnq
import org.rut.util.algorithm.support.ImprovedQuickSort; (?-5p;
import org.rut.util.algorithm.support.InsertSort; wqo2iRql
import org.rut.util.algorithm.support.MergeSort; ?QO)b9
import org.rut.util.algorithm.support.QuickSort; Re?sopg0r
import org.rut.util.algorithm.support.SelectionSort; @(.?e<
import org.rut.util.algorithm.support.ShellSort; (zkh`8L
01I5,Dm
/** <x@\3{{U
* @author treeroot e2w$":6>
* @since 2006-2-2 ixN>KwH
* @version 1.0 aq3evm
*/ |7WzTz
public class SortUtil { &|<~J(L;
public final static int INSERT = 1; .UbmU^y|
public final static int BUBBLE = 2; vj0`[X
public final static int SELECTION = 3; j}8IT
public final static int SHELL = 4; /1++ 8=
public final static int QUICK = 5; G8|[.n
public final static int IMPROVED_QUICK = 6; AG)N^yd
public final static int MERGE = 7; [:$j<}UmB
public final static int IMPROVED_MERGE = 8; /b@0HL?
public final static int HEAP = 9; >K#Z]k
Jl3l\I'
public static void sort(int[] data) { AF D/ J
sort(data, IMPROVED_QUICK); 77/y{#Sk
} +Cx~4zEq
private static String[] name={ sw*k(i
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" {npKdX
}; aA%$<ItH
>rlQY>5pH
private static Sort[] impl=new Sort[]{ "%ag^v9
new InsertSort(), ;}K1c+m!5V
new BubbleSort(), aq"E@fb
new SelectionSort(), rBs7,h
new ShellSort(), y5?T`ts,#
new QuickSort(), Faa:h#
new ImprovedQuickSort(), Q"8)'dL'
new MergeSort(), 7d/wT+f
new ImprovedMergeSort(), n);2b\&
new HeapSort() S|;a=K&hS
}; _5M!ec
)?'sw5C
public static String toString(int algorithm){ ,)V*xpp
return name[algorithm-1]; +`f gn9p
} do*`-SDy
R#tz"T@
public static void sort(int[] data, int algorithm) { WlP@Tm5g/
impl[algorithm-1].sort(data); jLvI!q
} 7|zt'.56[
`]]gD EPG{
public static interface Sort { 4q@o4C<0
public void sort(int[] data); b7v] g]*
} wd*T"V3
F-k1yZ?^
public static void swap(int[] data, int i, int j) { 8!>uC&bE8
int temp = data; z1!ya#,$
data = data[j]; m|~,#d@
data[j] = temp; f]$g9H
} %H<w.]>
} _KmpC>J+