[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; ClG\Kpirh
} E5!vw@,
int i1=l; A3)"+`&PUl
int i2=mid+1; zZ6m`]{B9?
for(int cur=l;cur<=r;cur++){ eSQkW
if(i1==mid+1) }{y)a<`
data[cur]=temp[i2++]; EHN(K-
else if(i2>r) |sdG<+
data[cur]=temp[i1++]; NOg/rDs'{
else if(temp[i1] data[cur]=temp[i1++]; i\<S ;
else 1w~PHH`~
data[cur]=temp[i2++]; ?Z2`8]-E
} T*:w1*:
} DkX^b:D*f
Ge_fU'F
} Q3Pu<j}Y
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改进后的归并排序: "AU.Eh"-1
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package org.rut.util.algorithm.support; l^Ob60)2
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import org.rut.util.algorithm.SortUtil; ^s6}[LDW>@
Y?TS,
/** _V4O#;%?
* @author treeroot ,Kl:4 Tv
* @since 2006-2-2 <rtKPlb//
* @version 1.0 U0t|i'Hx
*/ fcxg6W'
public class ImprovedMergeSort implements SortUtil.Sort { P0yDL:X[
ynv{ rMl
private static final int THRESHOLD = 10; )X-'Q-
8tQ;N'
/* XwUa|"X6
* (non-Javadoc) -'Ay(h
* rRg,{:;A
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) u$yXuFj/
*/ Vbt!, 2_)
public void sort(int[] data) { f";pfu_FZ
int[] temp=new int[data.length]; [I=|"Ic~
mergeSort(data,temp,0,data.length-1); HdN5zl,q
} VcGl8~#9
~n-Px)
private void mergeSort(int[] data, int[] temp, int l, int r) { OHi.5 (
int i, j, k; tPl 4'tW_
int mid = (l + r) / 2; #B<EMGH
if (l == r) }[Z'Sg]s
return; g3].STz6w
if ((mid - l) >= THRESHOLD) gu3iaM$W
mergeSort(data, temp, l, mid); Mh*r)B~%[
else dzEi^* (8
insertSort(data, l, mid - l + 1); VE-l6@`
if ((r - mid) > THRESHOLD) ?<${?L>
mergeSort(data, temp, mid + 1, r); )i}j\";>L
else OL>)SJj5
insertSort(data, mid + 1, r - mid); H.\`(`6
T[ZmD{6l
for (i = l; i <= mid; i++) { \?; `_E`j
temp = data; ep=r7Mft
} :~ pGHl
for (j = 1; j <= r - mid; j++) { 3("C'(W
temp[r - j + 1] = data[j + mid]; y92R}e\M
} +9w[/n^,G
int a = temp[l]; .ojEKu+EJ'
int b = temp[r]; gYhY1Mym
for (i = l, j = r, k = l; k <= r; k++) { #h?IoB7
if (a < b) { q)i %*IY
data[k] = temp[i++]; ?D6uviQg
a = temp; ?>Sv_0
} else { Ss+F
data[k] = temp[j--]; wkM1tKhy/
b = temp[j]; nS04Ha
} .26mB Xr
} K f/[Edn
} q0NFz mG
W}f)VC;D
/** nd]SI;<
* @param data (da`aRVDp
* @param l o5bp~.m<
* @param i 1ZI1+TDH
*/ M@R"-$Z
private void insertSort(int[] data, int start, int len) { cc|W1,q
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Fp/{L
} N[po)}hp
} k5I;Y:~`
} d.FU))lmD
} $AZYY\1
g}NO$?ndg
堆排序： Q,[G?vbj
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package org.rut.util.algorithm.support; o/w3b8
6;Z-Y>\c
import org.rut.util.algorithm.SortUtil; {4D`VfX_
i)?7+<X
/** =#2c r:1
* @author treeroot ;cXw;$&D
* @since 2006-2-2 Bn7uKa{P
* @version 1.0 6nZ]y&$G-k
*/ Ipk;Nq
public class HeapSort implements SortUtil.Sort{ S MWXP
KLyRb0V
/* (non-Javadoc) 5MVa;m
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) R9U{r.AA
*/ 3>KEl^1DB
public void sort(int[] data) { c_3B:F7
MaxHeap h=new MaxHeap(); S@/{34,
h.init(data); WO_Uc_R
for(int i=0;i h.remove(); ,AP0*Ln
System.arraycopy(h.queue,1,data,0,data.length); eX+36VG\
} w*-42r3,'
U?UU]>Q
private static class MaxHeap{ oX|T&"&
e9o\qEm
void init(int[] data){ 9MMCWMV
this.queue=new int[data.length+1]; }R%H?&P
for(int i=0;i queue[++size]=data; qYC&0`:H
fixUp(size); \baY+,Dr+
} {y9G "
} z&6_}{2,]
8zp?WUb
private int size=0; ./#YUIC
DZSS
private int[] queue; :C:6bDQ
%L=e%E=m
public int get() { AS7L
return queue[1]; Az&>.*
} \N9=13W<lK
P_(8+)ud-
public void remove() { 'z$$ZEz!C
SortUtil.swap(queue,1,size--); F\m^slsu7=
fixDown(1); z`wIb
} Zw]"p63eMa
file://fixdown l7|z]v-
private void fixDown(int k) { wZ(1\ M(
int j; fz(YP=@ZnP
while ((j = k << 1) <= size) { #EH=tJgO|J
if (j < size %26amp;%26amp; queue[j] j++; 8!E.3'jb
if (queue[k]>queue[j]) file://不用交换 V$?6%\M^*
break; P([!psgu
SortUtil.swap(queue,j,k); 5#GMp
k = j; kelBqJ-,p
} ` ,\b_SFg
} "w:h
private void fixUp(int k) { BJjic%V
while (k > 1) { ,"EaZ/Bl/
int j = k >> 1; 2lTt
if (queue[j]>queue[k]) }J#HIE\RG
break; ciblj?"Wi
SortUtil.swap(queue,j,k); $94lF~
k = j; y\T$) XGV
} tgF~5 o}?
} U#z"t&o=L
0t7N yKU
} p*Z<DEh#
,X|Oe@/
} ;/Hr ZhOE
"*bLFORkq'
SortUtil： K(+=V)'Dz
UD-+BUV
package org.rut.util.algorithm; |{#St-!-7
Ok!P~2J
import org.rut.util.algorithm.support.BubbleSort; L]=]/>jQ6
import org.rut.util.algorithm.support.HeapSort; YK/? mj1x
import org.rut.util.algorithm.support.ImprovedMergeSort; Qc7*p]E&
import org.rut.util.algorithm.support.ImprovedQuickSort; [+\He/M6
import org.rut.util.algorithm.support.InsertSort; 2j-l<!s
import org.rut.util.algorithm.support.MergeSort; A%^?z.
import org.rut.util.algorithm.support.QuickSort; ctP+ECH
import org.rut.util.algorithm.support.SelectionSort; n9Fq^^?
import org.rut.util.algorithm.support.ShellSort; evyjHcCx
RN`TUCQL
/** :Qa*-)rs
* @author treeroot \rr"EAk]
* @since 2006-2-2 Va?]:Q
* @version 1.0 jwI2T$
*/ Q`k;E}x_-
public class SortUtil { &{Z+p(3Gj
public final static int INSERT = 1; DGHSyB^+1
public final static int BUBBLE = 2; c}@E@Y`@w
public final static int SELECTION = 3; #(tdJ<HvC|
public final static int SHELL = 4; z4YDngf=4
public final static int QUICK = 5; N3u06
public final static int IMPROVED_QUICK = 6; /4;mjE
public final static int MERGE = 7; y6$a:6
public final static int IMPROVED_MERGE = 8; JG;}UuHYM
public final static int HEAP = 9; uH89oA/H
QBa+xI_ J
public static void sort(int[] data) { *$9U/ d
sort(data, IMPROVED_QUICK); WOO3z5 La
} L(3&,!@
private static String[] name={ "]eB2k_>
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" )<QX2~m<
}; ~>@~U]
-8)Hulo/{U
private static Sort[] impl=new Sort[]{ ef'kG"1
new InsertSort(), H,D5)1Uu
new BubbleSort(), JZ}zXv
new SelectionSort(), Q&I #
new ShellSort(), Uh0g !zzp
new QuickSort(), fq>{5ODO
new ImprovedQuickSort(), vAM1|,U
new MergeSort(), lf-.c$.>
new ImprovedMergeSort(), 6.]~7n
new HeapSort() H'i\N?VL
}; 9wx]xg4l"
AJ\gDjj<
public static String toString(int algorithm){ Y2VfJ}%Q
return name[algorithm-1]; Tf#Op v)
} ./I?|ih
u0W6u} 4;
public static void sort(int[] data, int algorithm) { eBa#Z1Z
impl[algorithm-1].sort(data); ]WNY"B>+
} jGouwta
Jj)J5S /
public static interface Sort { b}(c'W*z%
public void sort(int[] data); ;gL{*gR]S
} mX>N1zAz
fgqCX:SWz
public static void swap(int[] data, int i, int j) { }k.yLcXM
int temp = data; (&.T
data = data[j]; *C55DO^w
data[j] = temp; mx)!]B"
} Ys.GBSlHG
} .-YE(}^