[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; #w;;D7{@m
} Vf$1Sjw
int i1=l; oc:x&`j
int i2=mid+1; $ hoYkA
for(int cur=l;cur<=r;cur++){ hg4J2m
if(i1==mid+1) V_lGj
data[cur]=temp[i2++]; cCk1'D|X[e
else if(i2>r) pagC(F
data[cur]=temp[i1++]; 8:<1|]]
else if(temp[i1] data[cur]=temp[i1++]; jzQ I>u
else ;AltNGcM
data[cur]=temp[i2++]; [NjajA~z>F
} WkP|4&-<
} \QiqcD9Y
_Qg{ ;
} aoK4Du{
Txu>/1N,
改进后的归并排序: `BpCRKTG
RW)k_#%=
package org.rut.util.algorithm.support; jOtzx"/)rE
%uW<
import org.rut.util.algorithm.SortUtil; R@&?i=gk
}-dF+m:
/** v|>BDN@,6
* @author treeroot B]i+,u
* @since 2006-2-2 "(N-h\7Ex9
* @version 1.0 D"'#one
*/ Rn8#0%/Q
public class ImprovedMergeSort implements SortUtil.Sort { ^>eFm8`N
Nl=+.d6Qo
private static final int THRESHOLD = 10; jWhD5k@v
yG4MUf6
/* F; 0Dp
* (non-Javadoc) #|q;t
* ,rXW`7!2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) bu;vpNa
*/ |NXFla
public void sort(int[] data) { ypxC1E
int[] temp=new int[data.length]; S;BP`g<l=
mergeSort(data,temp,0,data.length-1); IG>>j}
} ^T=5zqRD
gl Li
private void mergeSort(int[] data, int[] temp, int l, int r) { f&f[La
int i, j, k; wH#Lb@cfZ0
int mid = (l + r) / 2; |O2|`"7
if (l == r) 31H|?cg<
return; Qve`k<Cj"
if ((mid - l) >= THRESHOLD) K:C+/O
mergeSort(data, temp, l, mid); b\H/-7<
else E#m76]vkCU
insertSort(data, l, mid - l + 1); L{zamVQG
if ((r - mid) > THRESHOLD) omr:C8T>
mergeSort(data, temp, mid + 1, r); h@EJTAi
else <x^IwS
insertSort(data, mid + 1, r - mid); p{w}
N{|[R
for (i = l; i <= mid; i++) { g\E ._ab<
temp = data; v!iWzN
} ^j1Gmv)
for (j = 1; j <= r - mid; j++) { )_WH#-}
temp[r - j + 1] = data[j + mid]; sY&rbJ(P
} Idt@Hk5<&
int a = temp[l]; zv>ZrFl*
int b = temp[r]; Z5 w`-#
for (i = l, j = r, k = l; k <= r; k++) { zp}yiE!bl
if (a < b) { [sjrb?Xd
data[k] = temp[i++]; oVAOGHE
a = temp; A7mMgb_
} else { !Mm+bWn=mB
data[k] = temp[j--]; l^)o'YS y
b = temp[j]; HdDo&#
} !N@Yh"c
} Z8N@e<!*~8
} lrM.RM96
$eTv6B?m
/** h4B+0
* @param data <#:Ebofsn
* @param l _Jt_2o%G
* @param i ]KfghRUH
*/ A632 :V
private void insertSort(int[] data, int start, int len) { &:IfhS
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); `@W3sW/^
} }S1Z>ZA5
} O(b"F? w
} KBp!zSl
} ufHuI*
e-YGuWGN7
堆排序： N4[B:n
ayB=|*Q"
package org.rut.util.algorithm.support; _:/Cl9~
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import org.rut.util.algorithm.SortUtil; g6tWU
f]O5V$!RuE
/** Te{aB"B
* @author treeroot ^R&_}bp
* @since 2006-2-2 <T4 7kLI
* @version 1.0 :..E:HdYO
*/ ljaAB+
public class HeapSort implements SortUtil.Sort{ UtHmM,*I
AIIBd
/* (non-Javadoc) "H/2r]?GT
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) D~[N_
*/ )eIz{Mdp=
public void sort(int[] data) { eWqVh[
MaxHeap h=new MaxHeap(); BVwRPt
h.init(data); Fj4l %=
for(int i=0;i h.remove(); 9P,A t8V(
System.arraycopy(h.queue,1,data,0,data.length); oRtY?6^$
} bqf]$}/8k
%tklup]LF8
private static class MaxHeap{ dK- ^
:~qtvs;{
void init(int[] data){ Y,<WX v
this.queue=new int[data.length+1]; fD]An<
for(int i=0;i queue[++size]=data; i75?*ld
fixUp(size); `"^@[1
} =PeW$q+
} N7Z(lI|a;
.j+2x[`l
private int size=0; Huug_E+
9/8@
private int[] queue; [5}cU{M
wd2P/y42;;
public int get() { W? 6
return queue[1]; <Bob#Tf ~
} .3g\[p
GSUOMy[M-
public void remove() { VLwJ6?.f'
SortUtil.swap(queue,1,size--); ~I8"l@H>
fixDown(1); ~]i]kU
} iYmzk?U
file://fixdown V}Y~z)i0
private void fixDown(int k) { qx#ghcU
int j; lhW#IiX
while ((j = k << 1) <= size) { R+@sHsZ@
if (j < size %26amp;%26amp; queue[j] j++; qU /Wg
if (queue[k]>queue[j]) file://不用交换 O #p)~V8~
break; i&SBW0)
SortUtil.swap(queue,j,k); JXZ:Wg
k = j; Cx1Sh#9
} z!t3xFN&/
} J T0,Z
private void fixUp(int k) { 4p/V6kr&r
while (k > 1) { t0AqGrn
int j = k >> 1; $HR(|{piZ
if (queue[j]>queue[k]) (0+GLI8
break; OA8b_k~
SortUtil.swap(queue,j,k); F~uA-g
k = j; %l]rQjV-
} `)gkkZ$)j
} W0r5D9k
n<"a+TTU
} !A ydhe
5e~{7{
} #/ gme
MIMPJXT#.
SortUtil： V }r_
UU:QK{{E
package org.rut.util.algorithm; 0I ND9h.%
-$!Pf$l@
import org.rut.util.algorithm.support.BubbleSort; Af! W K=
import org.rut.util.algorithm.support.HeapSort; 7+2aG
import org.rut.util.algorithm.support.ImprovedMergeSort; bQ:3G;
import org.rut.util.algorithm.support.ImprovedQuickSort; R~seUW7uv"
import org.rut.util.algorithm.support.InsertSort; 1PT_1[eAR
import org.rut.util.algorithm.support.MergeSort; A?{aUQB~|
import org.rut.util.algorithm.support.QuickSort; t9-\x
import org.rut.util.algorithm.support.SelectionSort; q_m#BE;t
import org.rut.util.algorithm.support.ShellSort; WTy8N
e[VJ0 A=
/** nH3b<k;S
* @author treeroot 0 S`b;f
* @since 2006-2-2 oT5rX ,8
* @version 1.0 JXa%TpI: E
*/ N6 }i>";_;
public class SortUtil { kI1{>vYD
public final static int INSERT = 1; vGLb2Q
public final static int BUBBLE = 2; %~v76;H<
public final static int SELECTION = 3; bMK'J
public final static int SHELL = 4; MdTd$ 4J3
public final static int QUICK = 5; )*QTxN
public final static int IMPROVED_QUICK = 6; "lnk
public final static int MERGE = 7; + 1%^c(3
public final static int IMPROVED_MERGE = 8; 9[]"%6
public final static int HEAP = 9; gQzJ2LU(
0_xcrM
public static void sort(int[] data) { bU +eJU_%
sort(data, IMPROVED_QUICK); J;]@?(
} pQm!Bt L
private static String[] name={ ]C:Ifh~
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 0R!}}*Ee>q
}; gu%'M:Xe
`?S?)0B
private static Sort[] impl=new Sort[]{ 4>tYMyLt0
new InsertSort(), fm2Mi~}0
new BubbleSort(), :aFpz6<
new SelectionSort(), p-03V"^&
new ShellSort(), bJMcI8`
new QuickSort(), z(#hL-{c
new ImprovedQuickSort(), 9,a,A6xry
new MergeSort(), 3b/vyZF
new ImprovedMergeSort(), DDCQAf
new HeapSort() @IKe<{w
}; 8LM1oal}
C5n=2luI_
public static String toString(int algorithm){ kAF}*&Kzd~
return name[algorithm-1]; arH\QPaka'
} J,M5<s[Xqt
oP`M\KXau
public static void sort(int[] data, int algorithm) { N %/DN
impl[algorithm-1].sort(data); V$F.`O!hfi
} *gpD4c7A\
,ce^"yG
public static interface Sort { MldL"*HW:
public void sort(int[] data); pxnUe1=
} 7;-i_&vws
qN,FX#DP
public static void swap(int[] data, int i, int j) { u4^"E+y^S
int temp = data; 8}E(UsTa
data = data[j]; (c|qX-%rC
data[j] = temp; O)Dw<j)
} $U.'K!B
} /Gv$1t^a