[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; EP#2it]0]
} ~;3#MAG
int i1=l; 9:4S[mz/hD
int i2=mid+1; |dLr #+'az
for(int cur=l;cur<=r;cur++){ I{OizBom
if(i1==mid+1) \KnRQtlI
data[cur]=temp[i2++]; B;eka[xU
else if(i2>r) UP^8Yhdo
data[cur]=temp[i1++]; g5@JA^\vZT
else if(temp[i1] data[cur]=temp[i1++]; f]8MdYX(
else Tk?uJIS :
data[cur]=temp[i2++]; +Q u.86dH
} mFF4qbe
} {/]2~!
84QOW|1
} S~);
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改进后的归并排序: w2.] 3QAZ
3A!a7]fW
package org.rut.util.algorithm.support; gSwV:hm
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import org.rut.util.algorithm.SortUtil; 7S}0Kuk)
i8V\x>9
/** IqYJ
* @author treeroot L]H'$~xx*
* @since 2006-2-2 g8N"-j&@
* @version 1.0 :oZ<[#p"*
*/ 4j=3'Z|
public class ImprovedMergeSort implements SortUtil.Sort { M5h r0R{
?9()ya-TE
private static final int THRESHOLD = 10; A,.X
@v%Kwe1Q
/* YbU8 xq
* (non-Javadoc) t|iNSy3
* OP1`!P y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) KAClV%jP
*/ qR'FbI
public void sort(int[] data) { /eQAGFG
int[] temp=new int[data.length]; ^wolY0p
mergeSort(data,temp,0,data.length-1); gS~H1Ro
} !G-+O#W`
p[C"K0>:_F
private void mergeSort(int[] data, int[] temp, int l, int r) { 9VxM1-8Gs
int i, j, k; p-}X=O$
int mid = (l + r) / 2; 8TFQ%jv
if (l == r) gS'{JZu2
return; 9,'m,2%W
if ((mid - l) >= THRESHOLD) N1ipK9a
mergeSort(data, temp, l, mid); }_'5Vb_
else #SHeK 4
insertSort(data, l, mid - l + 1); RxMsP;be
if ((r - mid) > THRESHOLD) MM@,J<
mergeSort(data, temp, mid + 1, r); }n==^2
else %Xd*2q4*
insertSort(data, mid + 1, r - mid); 'Tm1Mh0Fso
.J75bX5
for (i = l; i <= mid; i++) { b]]8Vs)'
temp = data; aj`&ca8
} fs ufYIf
for (j = 1; j <= r - mid; j++) { rw'+2\
temp[r - j + 1] = data[j + mid]; '(5GRI<
} v8ap"9b
int a = temp[l]; /Sj~lHh
int b = temp[r]; +]%S}<R
for (i = l, j = r, k = l; k <= r; k++) { T'5{p
if (a < b) { j9NF|
data[k] = temp[i++]; b)I-do+
a = temp; 5*$yY-A
} else { O=2|'L'h!
data[k] = temp[j--]; N]+6<
b = temp[j]; '3b\d:hN
} wmr?ANk
} ^Gk`n
} zTg\\z;
j?2~6W/[
/** ({!!b"B2
* @param data Vu5?;|^:
* @param l :oIBJ u%/
* @param i %)lp]Y33
*/ 3IMvtg
private void insertSort(int[] data, int start, int len) { \1<'XVS
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); L0wT:x*
} ^o3,YH
} eq6O6-
} DC8#b`j
} StI N+S@Z
sC-o'13
堆排序： XGSFG~d
072C!F
package org.rut.util.algorithm.support; C^)Imr
gs'M^|e)
import org.rut.util.algorithm.SortUtil; -%`~3*L
w jkh*Y
/** <<>+z5D+
* @author treeroot &42]#B"*
* @since 2006-2-2 .==D?#bn
* @version 1.0 6iU&9Z<%
*/ 8o5[tl ?w
public class HeapSort implements SortUtil.Sort{ [{7#IZL
_<S!tW
/* (non-Javadoc) stRM*.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) E`fG9:6l]
*/ )7 p" -
public void sort(int[] data) { =?OU^u`C
MaxHeap h=new MaxHeap(); OXQ*Xpc
h.init(data); :TQp,CEa
for(int i=0;i h.remove(); ;\RVC7
System.arraycopy(h.queue,1,data,0,data.length); xOTvrX
} r{R-X3s
P~\rP6 ;
private static class MaxHeap{ MRLiiIrq,5
B"GC|}N)v
void init(int[] data){ ;"MChk
this.queue=new int[data.length+1]; +dCDk* /m
for(int i=0;i queue[++size]=data; z0}j7ns]
fixUp(size); <Q|\mUS6
} wp?:@XM
} kd'b_D[$H
xk,Uf,,>
private int size=0; x4q}xwH
v}$Q
private int[] queue; layxtECP(
q}@L"a`
public int get() { hZ45i?%
return queue[1]; |A3"Jc.2o
} IBT>&(cnV
T)zk2\u
public void remove() { l?m"o-Gp3
SortUtil.swap(queue,1,size--); =!\Nh,\eQ
fixDown(1); #p(gB)o:l
} wsQnjT>
file://fixdown qf0pi&q
private void fixDown(int k) { Nh!`"B2B
int j; X?_rD'3
while ((j = k << 1) <= size) { WzzA:X
if (j < size %26amp;%26amp; queue[j] j++; ew1L+
if (queue[k]>queue[j]) file://不用交换 R{@saa5I(>
break; UdO8KD#r3
SortUtil.swap(queue,j,k); SP%X@~d
k = j; :xsZz$
} `PUqz&
} i-CJ{l
private void fixUp(int k) { V(&L
while (k > 1) { *u$aItx
int j = k >> 1; *Dp&;,b
if (queue[j]>queue[k]) %p}vX9U')
break; puOtF YZ\
SortUtil.swap(queue,j,k); rp@:i _]
k = j; x@ =p
} >fC&bab
} lD0p=`.
NN4Z:6W5
} P#A,(Bke3
fV"Y/9}(
} N?@^BZ
M XG>|
SortUtil： Km5_P##
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package org.rut.util.algorithm; fJLl-H
g}+|0FTV
import org.rut.util.algorithm.support.BubbleSort; Mk*4J]PP
import org.rut.util.algorithm.support.HeapSort; )la3GT*1mS
import org.rut.util.algorithm.support.ImprovedMergeSort; \'y]mB~k
import org.rut.util.algorithm.support.ImprovedQuickSort; 7UBDd1
import org.rut.util.algorithm.support.InsertSort; ,buX|
import org.rut.util.algorithm.support.MergeSort; IUOf/mM5
import org.rut.util.algorithm.support.QuickSort; MD[hqshoh
import org.rut.util.algorithm.support.SelectionSort; F8w7N$/V",
import org.rut.util.algorithm.support.ShellSort; {7e(0QK
FS"Ja`>j~
/** I=L["]
* @author treeroot 0ca0-vY
* @since 2006-2-2 mlByE,S2E
* @version 1.0 gclj:7U
*/ |<{SSA
public class SortUtil { goR_\b SU
public final static int INSERT = 1; 6m&GN4Ca
public final static int BUBBLE = 2; kQ=bd{a6
public final static int SELECTION = 3; 6/;YS[jX
public final static int SHELL = 4; +C`!4v\n
public final static int QUICK = 5; 1EV bGe%b
public final static int IMPROVED_QUICK = 6; nFni1cCD
public final static int MERGE = 7; &eV5#Ph
public final static int IMPROVED_MERGE = 8; ["nWIs[h
public final static int HEAP = 9; DGJ:#UE
U.TZd"
public static void sort(int[] data) { f,ro1Nke
sort(data, IMPROVED_QUICK); VESvCei
} xC< )]
private static String[] name={ Qh@Q6
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" @ 51!3jeu
}; Oem1=QpaC
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private static Sort[] impl=new Sort[]{ >)K3
new InsertSort(), !/}4_s`,
new BubbleSort(), v o:KL%)
new SelectionSort(), >"/TiQt
new ShellSort(), vJ0v6\
new QuickSort(), B>i%:[-e
new ImprovedQuickSort(), G4i%/_JU
new MergeSort(), bm;iX*~
new ImprovedMergeSort(), $@VJ@JAe
new HeapSort() i7dDklj4
}; ,.Ofv):=
E]q>ggeNH
public static String toString(int algorithm){ `6rLd>=R
return name[algorithm-1]; 0/~p1SSun
} [ &Wy $
Y's=31G@
public static void sort(int[] data, int algorithm) { }P2*MrkcHB
impl[algorithm-1].sort(data); \B')2phE
} -, +o*BP
Yh]a4l0
public static interface Sort { bAt!S
public void sort(int[] data); ta&z lZt
} iB0r+IbR
U,b80%k:
public static void swap(int[] data, int i, int j) { vT5GUO{5
int temp = data; b$2=w^*
data = data[j]; 3~`\FuHHe
data[j] = temp; 3+>R%TX6i<
} M0m%S:2
} A]"6/Lr9P