[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; Tr|PR t
} HVhd#Q;
int i1=l; GRVF/hPn
int i2=mid+1; BSB&zp
for(int cur=l;cur<=r;cur++){ qbCU&G|)
if(i1==mid+1) G`Z<a
data[cur]=temp[i2++]; PlK3;
else if(i2>r) N`3^:EJL8
data[cur]=temp[i1++]; mO(Y>|mm
else if(temp[i1] data[cur]=temp[i1++]; so/0f1R?~
else TA:uB[Ji
data[cur]=temp[i2++]; +{m+aHk
} A=Hv}lv
} nt-_)4Fm
r:E4Wi{\
} }[drR(]`dO
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改进后的归并排序: R$A%Zh6
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package org.rut.util.algorithm.support; |!7leL
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import org.rut.util.algorithm.SortUtil; suW|hh1/Ya
)C{20_
/** v^F00@2I
* @author treeroot V[]Pya|s+
* @since 2006-2-2 8O60pB;4
* @version 1.0 /"m#mhL
*/ %g89eaEZ
public class ImprovedMergeSort implements SortUtil.Sort { B!8X?8D
8faT@J'e;
private static final int THRESHOLD = 10; @g+v2(f2v
iQT0%WaHl
/* }~ N\A
* (non-Javadoc) Ea'jAIFPpO
* i gjn9p&_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5K682+^5
*/ v&7<f$5
public void sort(int[] data) { BA@M>j6d
int[] temp=new int[data.length]; *:"60fkoU
mergeSort(data,temp,0,data.length-1); e8oAGh"
} $>uUn3hSx\
f#m@eb
private void mergeSort(int[] data, int[] temp, int l, int r) { 4,h)<(d{
int i, j, k; 8;c\}D
int mid = (l + r) / 2; PApr8Xe
if (l == r) D^P0X:T]
return; XqhrQU|wM
if ((mid - l) >= THRESHOLD) P>)J:.tr0
mergeSort(data, temp, l, mid); e6tU8`z
else (: kn)
insertSort(data, l, mid - l + 1); Iw)m9h
if ((r - mid) > THRESHOLD) #R31VQwK5
mergeSort(data, temp, mid + 1, r); :%j"l7=>
else )Y'g;
insertSort(data, mid + 1, r - mid); ZNk[Jn [.
,/TmTX--d
for (i = l; i <= mid; i++) { NZADHO@0
temp = data; .f. tPm
} :oC;.u<*8
for (j = 1; j <= r - mid; j++) { *8;<w~
temp[r - j + 1] = data[j + mid]; ' S,g3
} gzH;`,
int a = temp[l]; * a1q M?
int b = temp[r]; `k8jFB C
for (i = l, j = r, k = l; k <= r; k++) { }NGP!
if (a < b) { x?u@ j7[
data[k] = temp[i++]; S?a4IK
a = temp; iC^91!<
} else { w`+-xT%
data[k] = temp[j--]; v*.iNA;&i
b = temp[j]; <RbfW'<G
} V?)V2>]
} Nge@8
} C?]eFKS."
MZcvr9y
/** Y8IC4:EO
* @param data J|be'V#]1
* @param l #902x*Z'c"
* @param i [q_62[-X
*/ /L@o.[H
private void insertSort(int[] data, int start, int len) { re#]zc<
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); =A{'57yP
} *)I^+zN
} >+.GBf<E
} Uam%u
} UWS 91GN@
m-;8O /
堆排序： }Y!s:w#
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package org.rut.util.algorithm.support; F1B/cd
u>agVB4\F
import org.rut.util.algorithm.SortUtil; 8\:>;XG6f
7t}s5}Z 4
/** k{b|w')
* @author treeroot uysTyzx
* @since 2006-2-2 T"C.>G'[B
* @version 1.0 ,)J>8eV
*/ (18ZEKk
public class HeapSort implements SortUtil.Sort{ jOGiT|A
1=sL[I7<
/* (non-Javadoc) _dCDT$^&r
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) C"0 VOb
*/ )D'#>!Y
public void sort(int[] data) { be]/ROP>H
MaxHeap h=new MaxHeap(); 3&{6+A
h.init(data); sKR%YK "A
for(int i=0;i h.remove(); Fs=x+8'M
System.arraycopy(h.queue,1,data,0,data.length); vkR~nIp
} {%^4%Eco
5`Uzxu
private static class MaxHeap{ DKem;_6OQ
jTV4iX
void init(int[] data){ J.U%W}Hx
this.queue=new int[data.length+1]; aUc#,t;Qd
for(int i=0;i queue[++size]=data; "-MB U
fixUp(size); n&|N=zh
} Knb(MI6
} Lyn{Uag
Z02EE-A
private int size=0; xw_$1 S
SK@ p0:
private int[] queue; }2m>S6""A
TqV^\C?
public int get() { $dK430_B
return queue[1]; 7^M$u\a)U
} p W5D!z
j;D$qd'J
public void remove() { D0kz;X
SortUtil.swap(queue,1,size--); Z(R0IW
fixDown(1); _nxu8g]
} C0Fd<|[
file://fixdown QkHG`yW
private void fixDown(int k) { %_B2/~
int j; QXL .4r%
while ((j = k << 1) <= size) { ggM~Chr
if (j < size %26amp;%26amp; queue[j] j++; h4hp5M
if (queue[k]>queue[j]) file://不用交换 {r|RH"|?Z(
break; y\-iGKz{0
SortUtil.swap(queue,j,k); /Ix5`Q)
k = j; ~dLbhjden
} '|5o(6u'
} y x#ub-A8
private void fixUp(int k) { ev+H{5W8
while (k > 1) { h?B1Emlq
int j = k >> 1; l. l)w
if (queue[j]>queue[k]) Xc" %-
break; =OPX9oG
SortUtil.swap(queue,j,k); ! os@G
k = j; >mJ`904L
} Lw(tO0b2H
} JgKhrDx
Df*<3G
} KQ81Oxu*C
d=uGB"
} C|w<mryx
H`URJ8k$Q
SortUtil： 4/mz>eK"
}-XZ1qr
package org.rut.util.algorithm; cwtlOg
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import org.rut.util.algorithm.support.BubbleSort; B|$o.$5
import org.rut.util.algorithm.support.HeapSort; vRf$#fBEQ
import org.rut.util.algorithm.support.ImprovedMergeSort; 7w8UnPuM
import org.rut.util.algorithm.support.ImprovedQuickSort; uW#s;1H.)
import org.rut.util.algorithm.support.InsertSort; hm0A%Js
import org.rut.util.algorithm.support.MergeSort; I} +up,B]o
import org.rut.util.algorithm.support.QuickSort; YTY(Et1i
import org.rut.util.algorithm.support.SelectionSort; jA^Dk$
import org.rut.util.algorithm.support.ShellSort; IqsUtWSp
;C:|m7|
/** 59W~bWHCP
* @author treeroot t#y,9>6
* @since 2006-2-2 HyKA+7}
* @version 1.0 1n7'\esC*
*/ $G }9iV7
public class SortUtil { {.KD#W $5
public final static int INSERT = 1; P2C>IS
public final static int BUBBLE = 2; P{_%p<:V
public final static int SELECTION = 3; M3F1O6=4j
public final static int SHELL = 4; K[/L!.Ag
public final static int QUICK = 5; :?FHqfN?_
public final static int IMPROVED_QUICK = 6; &N6[*7
public final static int MERGE = 7; /]-yZ0hX0O
public final static int IMPROVED_MERGE = 8; :Mh\;e
public final static int HEAP = 9; /cUu]#h
_FcTY5."S
public static void sort(int[] data) { UHU ,zgM
sort(data, IMPROVED_QUICK); aot2F60J,
} @V5i
private static String[] name={ @H~oOf
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" `"yxmo*0
}; 9^?muP<A
En\q. 3 5
private static Sort[] impl=new Sort[]{ ^q&|7Ou-
new InsertSort(), PE/uB,Wl
new BubbleSort(), P?n4B \!
new SelectionSort(), ^EkxZ4*g
new ShellSort(), 5jwv!L<n
new QuickSort(), bqA`oRb\
new ImprovedQuickSort(), H<<t^,E^.t
new MergeSort(), mTUoFXX[
new ImprovedMergeSort(), &=n/h5e0t&
new HeapSort() %xQ'i4`
}; 2e-bt@0t
<%m1+%mA.
public static String toString(int algorithm){ !7)#aXt&
return name[algorithm-1]; ANM=:EtP
} w{2CV\^>5
UpE+WzY
public static void sort(int[] data, int algorithm) { PUZcb+%]h
impl[algorithm-1].sort(data); e?B}^Dk0i
} C8T0=o/-`
p8@&(+z
public static interface Sort { J` gG`?
public void sort(int[] data); V rx,'/IS8
} (y&sUc9
B9$f y).Gp
public static void swap(int[] data, int i, int j) { 'kY/=*=Q
int temp = data; / j%~#@
data = data[j]; Meep
data[j] = temp; *l"CIG'
} zn&ZXFgN
} ePJ_O~c