[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; : FF:{&d
} DKqFe5rw
int i1=l; v)N8vFdd
int i2=mid+1; U5jY/e_
for(int cur=l;cur<=r;cur++){ w:I^iI.
if(i1==mid+1) NDglse
data[cur]=temp[i2++]; `9B xDp]I
else if(i2>r) &STgj|t_
data[cur]=temp[i1++]; 9aD6mp
else if(temp[i1] data[cur]=temp[i1++]; 6C9KT;6
else lb2mWsg"
data[cur]=temp[i2++]; ]^Z7w`=%5
} d i`}Y&
} t(VG#}
EMU~gwPR
} %}j.6'`{
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改进后的归并排序: Y=sRVypJ
X0^gj>GI|
package org.rut.util.algorithm.support; PA5ET@mD
g3 6oEz~|
import org.rut.util.algorithm.SortUtil; k$y(H;XA
N*$<Kjw
/** &<R8'
* @author treeroot .+]e9mV
* @since 2006-2-2 C_dsYuQ5R
* @version 1.0 @y[Zr6\z
*/ M7/P&d
public class ImprovedMergeSort implements SortUtil.Sort { LN ]ks)
p<?~~7V
private static final int THRESHOLD = 10; 4%LG9hS
K~z*P0g*
/* #R4Mv(BG
* (non-Javadoc) 5Qd |R
* [@U8&W
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \)eHf 7H
*/ 8 Mp2MZ*p
public void sort(int[] data) { 10_eUQN
int[] temp=new int[data.length]; 9"52b9U
mergeSort(data,temp,0,data.length-1); B)O=wx
} OYzt>hdH
D$q"k"
private void mergeSort(int[] data, int[] temp, int l, int r) { \NhCu$'
int i, j, k; @k<RX'~q
int mid = (l + r) / 2; qGuz`&i
if (l == r) .3?'+KZ,
return; nQdNXv<(
if ((mid - l) >= THRESHOLD) 6[$kEKOY=
mergeSort(data, temp, l, mid); `)\_
else >hoIJZP,
insertSort(data, l, mid - l + 1); >9a%"<(2#
if ((r - mid) > THRESHOLD) Re5m
mergeSort(data, temp, mid + 1, r); Q-F'-@`(C
else Q\z3YUk
insertSort(data, mid + 1, r - mid); r(yJE1Wz
kuu9'Sqc'b
for (i = l; i <= mid; i++) { 1)/B V{n
temp = data; Jme}{!3m
} }r]WB)_w
for (j = 1; j <= r - mid; j++) { P{)H7B>
temp[r - j + 1] = data[j + mid]; (6A>:_)
} 5 usfyY]z
int a = temp[l]; M$1+,[^f
int b = temp[r]; pWSYbN+d
for (i = l, j = r, k = l; k <= r; k++) { ?4Lb*{R
if (a < b) { YH)Unql
data[k] = temp[i++]; =}\]i*
a = temp; ~53E)ilB
} else { G\Hck=P[$3
data[k] = temp[j--]; ^c< <I-o|
b = temp[j]; $^IuE0.
} c[!e*n!y
} *u>2"!+Ob
} uQ&&?j
4S 2I]d
/** d`StBXG!
* @param data \@pl:Os
* @param l \>cZ=
* @param i QoDWR5*^D
*/ vMzR3@4e
private void insertSort(int[] data, int start, int len) { KK(x)(
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ]j*o&6cQf
} u):z1b3*?
} g0rdF
} eQcy'GA06
} uWx/V+w
j2qDRI
堆排序： '0H+2
`!qWHm6I*
package org.rut.util.algorithm.support; }O2hhh_
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import org.rut.util.algorithm.SortUtil; jV:U%
UbC)XiO
/** RK'3b/T
* @author treeroot v6s8 p
* @since 2006-2-2 hx)Ed
* @version 1.0 '9auQ(2
*/ ~Ufcy{x#
public class HeapSort implements SortUtil.Sort{ v&H&+:<
b44H2A.
/* (non-Javadoc) . Nog.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) wH|\;M{0V1
*/ m\1*/6oV
public void sort(int[] data) { ed{z^!w4
MaxHeap h=new MaxHeap(); e{=7,DRH<
h.init(data); LE1&atq
for(int i=0;i h.remove(); bGK&W;Myk
System.arraycopy(h.queue,1,data,0,data.length); U%gP2]t%cs
} V}8J&(\
VrF]X#\)
private static class MaxHeap{ >:OOuf#
uAVV4)
void init(int[] data){ |8+<qgQ
this.queue=new int[data.length+1]; c0Q`S"o+
for(int i=0;i queue[++size]=data; Ao{wd1
fixUp(size); 1O(fI|gcO
} XHN?pVZ7
} ZR..>=
H[-zQ#I9
private int size=0; Z]9 )1&
,0-
private int[] queue; 2jx""{
=@3Qsd
public int get() { X+&@$v1
return queue[1]; [W^6=7EO
} SvI
vja^O
public void remove() { CuuHRvU8
SortUtil.swap(queue,1,size--); I9Z8]Q+2"
fixDown(1); dr9I+c7u
} $#KSvo{otI
file://fixdown [;|g2\
private void fixDown(int k) { bE0S)b)
int j; ^~(bm$4r
while ((j = k << 1) <= size) { -$e\m] }Z
if (j < size %26amp;%26amp; queue[j] j++; jRgv 8n
if (queue[k]>queue[j]) file://不用交换 #lJF$
break; anl?4q3;9
SortUtil.swap(queue,j,k); J3q}DDnEo
k = j; Qz<v. _
} N4HnW0
} B623B HwS
private void fixUp(int k) { jq}5(*k
while (k > 1) { Q%t8cJL
int j = k >> 1; :=~([oSNW"
if (queue[j]>queue[k]) Kx<bVK4"
break; 0D.YO<PU
SortUtil.swap(queue,j,k); 8dL(cC
k = j; JNMZn/
} 7&T1RB'>
} NINyg"g<
{H0B"i
} 2Db[dk( ]
.^Ek1fi.
} Qz/=+A/4
RYvS,hf6z
SortUtil： $e<3z6
I^lb;3uR
package org.rut.util.algorithm; !FO||z(vb
$vc:u6I[
import org.rut.util.algorithm.support.BubbleSort; >TtkG|/U-T
import org.rut.util.algorithm.support.HeapSort; 53l9s<bOQ
import org.rut.util.algorithm.support.ImprovedMergeSort; F!SmCE(0x
import org.rut.util.algorithm.support.ImprovedQuickSort; L TO1LAac
import org.rut.util.algorithm.support.InsertSort; ^Z}INUv]7
import org.rut.util.algorithm.support.MergeSort; 1[B?nk
import org.rut.util.algorithm.support.QuickSort; W%Ky#!\-
import org.rut.util.algorithm.support.SelectionSort; &LYU#$sj
import org.rut.util.algorithm.support.ShellSort; ^iTjr$hQ;
#M8"b]oh6
/** )8e_<^M
* @author treeroot .s,hl(w,
* @since 2006-2-2 'MsxZqW"~
* @version 1.0 0~^opNR
*/ e `_ [+y
public class SortUtil { j7uiZU;3Rx
public final static int INSERT = 1; E#_}y}7JY
public final static int BUBBLE = 2; !@bN
public final static int SELECTION = 3; 9~>;sjJk
public final static int SHELL = 4; 8tPq5i
public final static int QUICK = 5; #PtV=Ee1
public final static int IMPROVED_QUICK = 6; +]*?J1Y8Z
public final static int MERGE = 7; +hKQha!*
public final static int IMPROVED_MERGE = 8; (MbI8B>
public final static int HEAP = 9; WO_cT26Y
w{Dk,9>w)
public static void sort(int[] data) { yjN|PqtSV
sort(data, IMPROVED_QUICK); A!@D }n
} )/f,.Z$
private static String[] name={ S{J$[!F
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Xt9?7J#\T
}; rXfQ_
hv7!x=?8
private static Sort[] impl=new Sort[]{ knF *~O :y
new InsertSort(), b~v
new BubbleSort(), .F}ZP0THnZ
new SelectionSort(), }U+gJkY2
new ShellSort(), [)9bR1wh
new QuickSort(), DhkzVp_
new ImprovedQuickSort(), zD2Bhta y
new MergeSort(), f,PFvT$5e
new ImprovedMergeSort(), lusINILc
new HeapSort() sa*]q~a
}; !L-.bve!
UZ&bT'>;9g
public static String toString(int algorithm){ Px'%5TKN
return name[algorithm-1]; vNi7=3
} _0^<)OSY
sDWX} NV
public static void sort(int[] data, int algorithm) { {"'W!WTb
impl[algorithm-1].sort(data); MT;<\T
} #).om*Xh
lHz:Iibt
public static interface Sort { *1}9`$
public void sort(int[] data); a*74FVZo.;
} Qe]@`Vg
7P:0XML}
public static void swap(int[] data, int i, int j) { z`5+BL,|ND
int temp = data; vF3>nN(]
data = data[j]; A3yVT8
data[j] = temp; D OPOzh
} XQ,IEj|
} &l{yEWA}g