[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; IPa)+ ZQ
} p3W-*lE
int i1=l; WW[Gne
int i2=mid+1; n%&+yg
for(int cur=l;cur<=r;cur++){ o'*7I|7a
if(i1==mid+1) JIh:IR(ta
data[cur]=temp[i2++]; [:"7B&&A
else if(i2>r) _@_w6Rh
data[cur]=temp[i1++]; YacLYo#
else if(temp[i1] data[cur]=temp[i1++]; 2)4oe
else SLi?E
data[cur]=temp[i2++]; ^,sKj-
} _I<LB0kgf.
} FI=]K8
<"HbX
} ? f>pKe
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改进后的归并排序: Bf+7;4-
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package org.rut.util.algorithm.support; fb;y*-?#
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import org.rut.util.algorithm.SortUtil; i286`SLU
96]!*}
/** N799@:.
* @author treeroot D\9-MXc1
* @since 2006-2-2 -j"]1JLQ
* @version 1.0 ])D39
*/ [ m#|[%
public class ImprovedMergeSort implements SortUtil.Sort { :+Okv$v4
HTw7l]]
private static final int THRESHOLD = 10; p)y'a+|7
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/* y{O817 \
* (non-Javadoc) l 4e`-7
* $5v:z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @yxF/eeEy+
*/ F?*ko,
public void sort(int[] data) { rFl6xM;F
int[] temp=new int[data.length]; S{7 R6,B5
mergeSort(data,temp,0,data.length-1); p&Ev"xhs
} ,HHCgN
dVe
private void mergeSort(int[] data, int[] temp, int l, int r) { \95O
int i, j, k; "79"SSfOc
int mid = (l + r) / 2; ;rjd?r
if (l == r) ]O1}q!s
return; wN^$8m5\T^
if ((mid - l) >= THRESHOLD) d@#wK~I
mergeSort(data, temp, l, mid); p"k[ac{
else Jh!'"7
insertSort(data, l, mid - l + 1); gK+/wTQ%
if ((r - mid) > THRESHOLD) H){lXR/#u
mergeSort(data, temp, mid + 1, r); *p=a-s5-
else i3v|r 0O~L
insertSort(data, mid + 1, r - mid); 7'1 +i
V<W$h`
for (i = l; i <= mid; i++) { -FrNk>
temp = data; KV {J>J1
} .M zAkZ=
for (j = 1; j <= r - mid; j++) { e3!0<A[X
temp[r - j + 1] = data[j + mid]; {IR-g,B
} q{E44 eQ7F
int a = temp[l]; &>$+O>c ,
int b = temp[r]; 1SO!a R#g
for (i = l, j = r, k = l; k <= r; k++) { ,"U_oa3
if (a < b) { n,vs(ZL:
data[k] = temp[i++]; zc#$hIi
a = temp; \Uh$%#}.
} else { 9#iv|X
data[k] = temp[j--]; B?pNF+?'z
b = temp[j]; ey ;94n:<
} 6Qh@lro;y
} N:nhS3N<L
} m.EIMuj
M>LgEc-v67
/** #'lqE)T
* @param data H4{CiZ
* @param l ?Q#yf8
* @param i C0v1x=(xiM
*/ 6xq/
private void insertSort(int[] data, int start, int len) { !gbPxfH:6
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); GX-V|hLaGX
} |ryV7VJ8
} CYFi_6MFl
} ?vn9HhTD
} fqp!^-!X
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堆排序： {Z!x]}{M
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package org.rut.util.algorithm.support; %3;vDB*L$
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import org.rut.util.algorithm.SortUtil; vv0+F6 @
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/** 'ugc=-0pd
* @author treeroot hw9qnSeRy
* @since 2006-2-2 d.Im{-S
* @version 1.0 =R6IW,*
*/ P#o"T4 >
public class HeapSort implements SortUtil.Sort{ F)n^pT
nkTpUbS'f?
/* (non-Javadoc) AS? ESDC
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) bpgvLZb>s
*/ ]:_s7v
public void sort(int[] data) { 7H!/et?S,
MaxHeap h=new MaxHeap(); cN3!wE
h.init(data); :f_fp(T
for(int i=0;i h.remove(); 1LZ[i89&%
System.arraycopy(h.queue,1,data,0,data.length); I6-.;)McO
} 0aM&+j\q}
rHaj~s 4
private static class MaxHeap{ CFTw=b@
tN1xZW:
void init(int[] data){ X%rsa7H3J
this.queue=new int[data.length+1]; ;lP/hG;`
for(int i=0;i queue[++size]=data; 6Q*Zy[=
fixUp(size); N5d)&a 7?
} H5!e/4iz
} r\T'_wo
nr]:Y3KyxX
private int size=0; cMK}BHOC
38E %]*5F
private int[] queue; L.?QZN%cN
cXod43
public int get() { E< Y!BT[X
return queue[1]; 4&kC8 [r
} zQ~ax!}R
zI,z<-
public void remove() { ?>s[B7wMp
SortUtil.swap(queue,1,size--); ).3riR
fixDown(1); e|}B;<
} ^).
file://fixdown ("KtJ
private void fixDown(int k) { `Kbf]"4q
int j; ey@ccc*sZ9
while ((j = k << 1) <= size) { Dv"HFQuF
if (j < size %26amp;%26amp; queue[j] j++; < Dt/JA(p
if (queue[k]>queue[j]) file://不用交换 19b@QgfWpb
break; E?- ~*T
SortUtil.swap(queue,j,k); 3O*^[$vM
k = j; N 9W,p2
} X;]Ijha<*
} $p|Im,
private void fixUp(int k) { Ao+6^z_
while (k > 1) { $0Ys{m
int j = k >> 1; ^r~O*
if (queue[j]>queue[k]) "`NAg
break; :s*t\09V7
SortUtil.swap(queue,j,k); hg2Ywzfm-
k = j; h~lps?.#b
} E7q,6f3@r
} q|V|Jl
21O@yNpS$
} @ZRg9M:N
1~Z
} sJ{r+wY
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SortUtil： NL,6<ZOon,
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package org.rut.util.algorithm; $*`E;}S0
orOq5?3
import org.rut.util.algorithm.support.BubbleSort; *cZ7?
import org.rut.util.algorithm.support.HeapSort; b;FaTm@
import org.rut.util.algorithm.support.ImprovedMergeSort; X.sOZb?$
import org.rut.util.algorithm.support.ImprovedQuickSort; +/ {lz8^,
import org.rut.util.algorithm.support.InsertSort; Cp+tcrd_s
import org.rut.util.algorithm.support.MergeSort; 2}XxRJ0
import org.rut.util.algorithm.support.QuickSort; \H&;.??W
import org.rut.util.algorithm.support.SelectionSort; -24ccN;
import org.rut.util.algorithm.support.ShellSort; @Ko#nDEq
Sk:x.oOZ
/** MV w.Fl
* @author treeroot T(,@]=d,DD
* @since 2006-2-2 fda4M
* @version 1.0 6VS_L@
*/ Khl0~
public class SortUtil { yY{
public final static int INSERT = 1; (>,b5g
public final static int BUBBLE = 2; rp^:{6O
public final static int SELECTION = 3; "&{.g1i9
public final static int SHELL = 4; 2a;[2':
public final static int QUICK = 5; 'v@*xF/L6a
public final static int IMPROVED_QUICK = 6; VoQhzp6&
public final static int MERGE = 7; unNN&m#@
public final static int IMPROVED_MERGE = 8; %%#bTyF
public final static int HEAP = 9; pFV~1W:
R\Ckk;<$
public static void sort(int[] data) { }#2(WHf=<
sort(data, IMPROVED_QUICK); )TyP{X>
} 'vYt_T
private static String[] name={ XL9-N?(@
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" aK]AhOG
}; $e{[fmx
x<OVtAUB
private static Sort[] impl=new Sort[]{ -PU.Uw]
new InsertSort(), |qwx3 hQ?
new BubbleSort(), DF=Rd#
new SelectionSort(), ms\\R@R
new ShellSort(), N7KG_o%
new QuickSort(), Gm3`/!r
new ImprovedQuickSort(), ; xQhq*
new MergeSort(), j,SZJ{ebXg
new ImprovedMergeSort(), =6f)sZpPh
new HeapSort() /"8|26
}; UR S=1+
yW\kmv.O
public static String toString(int algorithm){ Ed{sC[j=
return name[algorithm-1]; 3lEP:Jp
} 3xKgj5M
_ b</ ::Tp
public static void sort(int[] data, int algorithm) { kY6_n4
impl[algorithm-1].sort(data); F-M)6&T
} xP;>p| M
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public static interface Sort { #/8 Nav
public void sort(int[] data); B52dZb
} e.#,9
a;nYR5f
public static void swap(int[] data, int i, int j) { U.b|3E/^
int temp = data; E1`_[=8a9
data = data[j]; ,U+>Q!$`\^
data[j] = temp; g6S-vSX,
} %`\Qtsape
} yF_/.mI