[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; #O |Z\|n
} #1v>3H(
int i1=l; #n[1%8l,
int i2=mid+1; qC%[J:RwF
for(int cur=l;cur<=r;cur++){ kr_!AW<.tz
if(i1==mid+1) 5G-}'-R
data[cur]=temp[i2++]; g7|$JevR0
else if(i2>r) ?B&@
data[cur]=temp[i1++]; #]@<YKoV{
else if(temp[i1] data[cur]=temp[i1++]; "?lm`3W"
else 2`o}neF{
data[cur]=temp[i2++]; B f_oIc
} _uR-Z_z
} 7sQw&yUL)
Vo\RtM/6{
} `xhiG9mz~
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改进后的归并排序: r*'X]q|L+
;gh#8JkI
package org.rut.util.algorithm.support; fCMH<}w
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import org.rut.util.algorithm.SortUtil; %("Bq"Q8
M=n_;3,o
/** 6!,Am^uXM
* @author treeroot K$H>/*&'~
* @since 2006-2-2 `J>76WN
* @version 1.0 "rjqDpH
*/ uF!3a$4]
public class ImprovedMergeSort implements SortUtil.Sort { +G!N@O
R|%R-J]
private static final int THRESHOLD = 10; ~ E)[!y
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/* Sd3KY9,
* (non-Javadoc) i4Y_5
* (O N \-*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) LiyEF&_u
*/ D<rO:Er?*a
public void sort(int[] data) { .qyk[O
int[] temp=new int[data.length]; Y2 &N#~l*
mergeSort(data,temp,0,data.length-1); )p-B@5bb
} DRo@gYDn
P&/PCSf
private void mergeSort(int[] data, int[] temp, int l, int r) { Tr1#=&N0
int i, j, k; gc:qqJi)X
int mid = (l + r) / 2; 41<.e`{
if (l == r) "+REv_:
return; T,72I
if ((mid - l) >= THRESHOLD) gY], (*v
mergeSort(data, temp, l, mid); lD!o4ZAo
else )$/Gh&1G
insertSort(data, l, mid - l + 1); t6;Ln().Hw
if ((r - mid) > THRESHOLD) fCSM#3|,]
mergeSort(data, temp, mid + 1, r); uf*sI
else ,Ty>sZ#/fz
insertSort(data, mid + 1, r - mid); BJ3st
U9;C#9E
for (i = l; i <= mid; i++) { WV5gH*uUa
temp = data; :\Z;FA@g(g
} ;T}#-`O_Im
for (j = 1; j <= r - mid; j++) { G?)vqmJ%
temp[r - j + 1] = data[j + mid]; ;l_%;O5
} oy!W$ ?6
int a = temp[l]; E+$vIYq:W
int b = temp[r]; OHzI!,2]
for (i = l, j = r, k = l; k <= r; k++) { S]Gw}d]4
if (a < b) { 22L#\qVkl
data[k] = temp[i++]; XF1x*zc
a = temp; 0X\,!FL
} else { da3]#%i0
data[k] = temp[j--]; Tx35~Z`0
b = temp[j]; \xk`o5/{
} dL<okw
} cpB$bC](
} M:c^[9)y
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/** `LL#Aia
* @param data M_V\mYC8I
* @param l /<Cl\q2 A
* @param i OqDLb
*/ FqiCzP4
private void insertSort(int[] data, int start, int len) { 5tR<aIf
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); #rzq9}9tB
} .:c^G[CQ^9
} 7|3Z+#|T
} 1i9}mzy%
} -[~UX!XFM
.O'S@ %]
堆排序： )cB00*/
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package org.rut.util.algorithm.support; .l5y!?
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import org.rut.util.algorithm.SortUtil; lyKV^7}
Mw7 ~:O`
/** BCF-lrZ&
* @author treeroot gNl@T
* @since 2006-2-2 gOa'o<
* @version 1.0 fk`y}#7M
*/ [V()7
public class HeapSort implements SortUtil.Sort{ UaCEh?D+Y
h<i.@&
/* (non-Javadoc) BOn2`|oLuF
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [#n~ L6
*/ 2(LS<HqP[
public void sort(int[] data) { NFPW#-TF
MaxHeap h=new MaxHeap(); K9}ppgL'$
h.init(data); +Tde#T&[
for(int i=0;i h.remove(); BBnbXhxZ
System.arraycopy(h.queue,1,data,0,data.length); \?h +
} #B|`F?o
M[D`)7=b
private static class MaxHeap{ }S3m wp<Y
^-PlTmT
void init(int[] data){ (w?@qs!
this.queue=new int[data.length+1]; ^~|P[}
for(int i=0;i queue[++size]=data; '0U+M{
fixUp(size); J@(=#z8xS
} A/%K=H?
} c[?S}u|['
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private int size=0; l%.3hId-
+wwpaR`
private int[] queue; J`;G9'n2
,ju1:`
public int get() { 8$-Wz:X&
return queue[1]; MOP %vS
} e2UbeP
6T&6N0y+9
public void remove() { s#?Y^bgH
SortUtil.swap(queue,1,size--); #Qc[W +%
fixDown(1); f8_5.vlw
} YMad]_XOP
file://fixdown gvYa&N
private void fixDown(int k) { ~d?7\:n
int j; "m0>u,HmI
while ((j = k << 1) <= size) { S*?'y
if (j < size %26amp;%26amp; queue[j] j++; aePhtQF
if (queue[k]>queue[j]) file://不用交换 %JBp~"
break; A!H6$-W|p
SortUtil.swap(queue,j,k); I<z /Y?
k = j; .RH}/D
} x "]%q^x
} lMB^/-Y
private void fixUp(int k) { {HNGohZt
while (k > 1) { ["Ep.7=SU
int j = k >> 1; G+ Y`65
if (queue[j]>queue[k]) :D}xT]
break; 1[D~Eep
SortUtil.swap(queue,j,k); h&L+Qx
k = j; 2!cP[Ck
} i;y<gm"
} [zn`vT
}E[S%W[
} tx}{E<\>$
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} &`Q0&8d5
}7+G'=XI/
SortUtil： i>_V?OT#5
+*a:\b"fx
package org.rut.util.algorithm; \gki!!HQ
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import org.rut.util.algorithm.support.BubbleSort; ae{%* \J
import org.rut.util.algorithm.support.HeapSort; mWsVOf>g
import org.rut.util.algorithm.support.ImprovedMergeSort; ^O6PZm5J}
import org.rut.util.algorithm.support.ImprovedQuickSort; FGG Fi(
import org.rut.util.algorithm.support.InsertSort; ,xuqQ;JX
import org.rut.util.algorithm.support.MergeSort; uXxyw7\W
import org.rut.util.algorithm.support.QuickSort; bk}.^m!
import org.rut.util.algorithm.support.SelectionSort; iE':ur<`
import org.rut.util.algorithm.support.ShellSort; )}9Ef"v|
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/** aN}yS=(Ff
* @author treeroot 4(& W>E
* @since 2006-2-2 lE`hC#m
* @version 1.0 R"];`F(#
*/ iyc}a6g
public class SortUtil { Z<;<!+,
public final static int INSERT = 1; &`0y<0z
public final static int BUBBLE = 2; Z 3m5DK
public final static int SELECTION = 3; D0v!fF~
public final static int SHELL = 4; 0rxlN [Yp
public final static int QUICK = 5; pjvChl5
public final static int IMPROVED_QUICK = 6; ;iy]mPd
public final static int MERGE = 7; 73A1+2
public final static int IMPROVED_MERGE = 8; l6:k|hrm;
public final static int HEAP = 9; OvX z+C,
Z+' 7c|a
public static void sort(int[] data) { BR8z%R
sort(data, IMPROVED_QUICK); .<gAa"
} K!7o#"GM
private static String[] name={ 25XD fi75
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" m%m/#\J E
}; _=3H!b =
|+mhYq|`
private static Sort[] impl=new Sort[]{ vo-n9Bj
new InsertSort(), '=G4R{
new BubbleSort(), O`g44LW2n
new SelectionSort(), i{I'+%~R
new ShellSort(), *Tl"~)'t~
new QuickSort(), -d[9mS
new ImprovedQuickSort(), 2BS2$#c>
new MergeSort(), S)C =Q~&
new ImprovedMergeSort(), T12?'JL^r
new HeapSort() ZtlF]k:MV
}; 67+ K ?!,
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public static String toString(int algorithm){ Os?G_ziIB
return name[algorithm-1]; 2/PaXI/Z
} ~j^HDHY@
'C]zB'H=
public static void sort(int[] data, int algorithm) { _&DI_'5q+
impl[algorithm-1].sort(data); ^SpD)O{
} WpP8J1KN[
8b8ui
public static interface Sort { K I
public void sort(int[] data); Fx~=mYU
} 8c3`IIzAS
z'O$[6m6
public static void swap(int[] data, int i, int j) { mhH[jO)
int temp = data; F2:+i#lE
data = data[j]; ;El"dqH
data[j] = temp; cR[)[9}
} W#$ pt>h)
} -\b~R7VQ