[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; 0PIiG-o9
} f`w$KVZ1!w
int i1=l; 1"J\iwN3
int i2=mid+1; Hn"xn79nc
for(int cur=l;cur<=r;cur++){ __HPwOCG7
if(i1==mid+1) ))"J
data[cur]=temp[i2++]; s[h& Uv"G
else if(i2>r) F(*~[*Ff
data[cur]=temp[i1++]; DJ?kQ
else if(temp[i1] data[cur]=temp[i1++]; e573UB
else }t!,{ZryE1
data[cur]=temp[i2++]; C2RR(n=N^
} 8x$BbK
} eekp&H$'s
.a._WZF
} ^E_`M:~
RUHQ]@d#T
改进后的归并排序: R*~<?}Rr
b~?FV>gl
package org.rut.util.algorithm.support; u/?s_OR
KLv`Xg\
import org.rut.util.algorithm.SortUtil; _,V 9^
&9bsTm
/** k2Yh?OH
* @author treeroot k$`~,LJp
* @since 2006-2-2 HMsTm}d
* @version 1.0 `OzcL
*/ TCAtb('D
public class ImprovedMergeSort implements SortUtil.Sort { =Q985)Y&
U X)k;h
private static final int THRESHOLD = 10; %_xRS
n(^{s5 Rr
/* 90OSe{
* (non-Javadoc) $]:ycn9l
* 2O\p`,.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) # Vz9j
*/ rjzRZ
public void sort(int[] data) { l \~w(8g<A
int[] temp=new int[data.length]; k(|D0%#b7
mergeSort(data,temp,0,data.length-1); 69{^Vfd;Y
} JjarMJr|D
7FL!([S5i
private void mergeSort(int[] data, int[] temp, int l, int r) { u,i~,M
int i, j, k; ud]O'@G<
int mid = (l + r) / 2; FHpS?htRy
if (l == r) P,y*H_@k
return; UJ-IK|P.#
if ((mid - l) >= THRESHOLD) (jYHaTL6Y'
mergeSort(data, temp, l, mid); S;#S3?G
else ab?
insertSort(data, l, mid - l + 1); (`+%K_
if ((r - mid) > THRESHOLD) II$B"-
mergeSort(data, temp, mid + 1, r); {@K>oaZ
else _l$V|
insertSort(data, mid + 1, r - mid); 39| W(,
,!U._ic'B
for (i = l; i <= mid; i++) { pyA;%vJn
temp = data; 4%L`~J4 wr
} *^R?*vNs
for (j = 1; j <= r - mid; j++) { -r%4,4
temp[r - j + 1] = data[j + mid]; c@d[HstBJ
} A[QUFk(
int a = temp[l]; 6Yw;@w\
int b = temp[r]; cVjs-Xf7D%
for (i = l, j = r, k = l; k <= r; k++) { FncK#hZ.
if (a < b) { *?'nA{a)E
data[k] = temp[i++]; |sd0fTK
a = temp; 4/Ub%t-
} else { L{H` t{A
data[k] = temp[j--]; HGqT"NJr
b = temp[j]; ??&Q"6Oe
} &2-dZK
} &DoYz[q
} !{'C.sb?~
c#'t][Ii
/** G'b*.\=
* @param data }F3}-5![
* @param l ciRn"X=l
* @param i KQ0Zy
*/ !#l>+9
private void insertSort(int[] data, int start, int len) { AD_RU_a9
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); +"1@6,M
} YlfzHeN1
} @=CN#D12
} H4C]%Q
} +]I7]
;&mefaFlWp
堆排序： _*\:UBZx6
d{^9` J'
package org.rut.util.algorithm.support; UIS\t^pJD
fFu+P<?"
import org.rut.util.algorithm.SortUtil; w1q-bIU
VJW%y)_[
/** V$U#'G>m
* @author treeroot om6'%nXhn
* @since 2006-2-2 A")F7F31c
* @version 1.0 t[HfaW1W
*/ fBtTJ+51}
public class HeapSort implements SortUtil.Sort{ Z$qLY<aV
xUT]6T0dB
/* (non-Javadoc) hSQ*_#
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) S]_iobWK
*/ 1/b5i8I2v
public void sort(int[] data) { )b^yAzL?
MaxHeap h=new MaxHeap(); MTm}qx@L
h.init(data); a3t[Tk;
for(int i=0;i h.remove(); P)7:G?OTx
System.arraycopy(h.queue,1,data,0,data.length); \@")2o+
} )anprhc
bT(}=j
private static class MaxHeap{ cJ[gCS
dk<) \C"
void init(int[] data){ W=zHD9
this.queue=new int[data.length+1]; }<m'Nkz<X
for(int i=0;i queue[++size]=data; #0OW0:Q
fixUp(size); XMt)\r.
} 5d?\>dA
} ?K5S{qG'O
v6uXik
private int size=0; sa8Q1i&%
.%~m|t+Rt
private int[] queue; [PXv8K%]p
Uwj|To&QR
public int get() { Y!!w*G9b
return queue[1]; PfF5@W;E;
} !2YvG%t^6
,x(?7ZW>
public void remove() { -^C^3pms
SortUtil.swap(queue,1,size--); be^+X[
fixDown(1); -zn$h$N4
} *@;Pns]L-
file://fixdown ),DLrGOl
private void fixDown(int k) { {tE9m@[AF
int j; CKB~&>xx
while ((j = k << 1) <= size) { &E&_Z6#
if (j < size %26amp;%26amp; queue[j] j++; [g<rzhC~=
if (queue[k]>queue[j]) file://不用交换 Epo/}y
break; ks3ydHe`
SortUtil.swap(queue,j,k); n-djAhy
k = j; H3Ws$vl9n
} yRd[$p
} \0)v5u
private void fixUp(int k) { r Uau??
while (k > 1) { utSW>
int j = k >> 1; =}F}XSvXH
if (queue[j]>queue[k]) d8N{sT
break; TwdY6E3`
SortUtil.swap(queue,j,k); Hl"^E*9x
k = j; eMHBY6<~=
} $U*b;'o
} (U`<r-n\n
jWpm"C
} Vt4KG+zm
G;jX@XqZ
} ;T-`~
i#4}xvi
SortUtil： l%\p
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package org.rut.util.algorithm; w20)~&LE-
|3]#SqX
import org.rut.util.algorithm.support.BubbleSort; #(Xv\OE
import org.rut.util.algorithm.support.HeapSort; z^,P2kqK_
import org.rut.util.algorithm.support.ImprovedMergeSort; %fJ~3mu
import org.rut.util.algorithm.support.ImprovedQuickSort; _P}wO8
import org.rut.util.algorithm.support.InsertSort; >;^t)6
import org.rut.util.algorithm.support.MergeSort; Rz03he
import org.rut.util.algorithm.support.QuickSort; Y|X!da/
import org.rut.util.algorithm.support.SelectionSort; (&o|}"kRq
import org.rut.util.algorithm.support.ShellSort; w ]%EJ|'
[8 I*lsS
/** WALK@0E
* @author treeroot 0bz':M#k &
* @since 2006-2-2 >~}}*yp
* @version 1.0 u2o196,Ut
*/ SJ7-lben3
public class SortUtil { DeK&_)g| Z
public final static int INSERT = 1; ->9waXRDz)
public final static int BUBBLE = 2; R+&{lc
public final static int SELECTION = 3; ;owU]Xk%8K
public final static int SHELL = 4; TdKo"H*C
public final static int QUICK = 5; Y@l>4q")
public final static int IMPROVED_QUICK = 6; '/U%-/@
public final static int MERGE = 7; VX6M4<8
public final static int IMPROVED_MERGE = 8; 'hNRIM1
public final static int HEAP = 9; q.:j yj6
vp|.x |@
public static void sort(int[] data) { +*`>7m<^
sort(data, IMPROVED_QUICK); `Lj'2LoER
} E51'TT9
private static String[] name={ ;659E_y>
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" hd>_K*oH
}; |-Q="7b%
k*ZYT6Z?
private static Sort[] impl=new Sort[]{ fG"4\A
new InsertSort(), kNg{
new BubbleSort(), eW\C@>Ke
new SelectionSort(), bbG!Fg=qQ?
new ShellSort(), bMGU9~CeJ
new QuickSort(), O5v~wLx9e
new ImprovedQuickSort(), 1$n!Lj=5
new MergeSort(), M2Zk1Z
new ImprovedMergeSort(), ~P,@">}
new HeapSort() n2N:rP
}; <Kk[^.7C;
D6fGr$(N%
public static String toString(int algorithm){ BJP^?FUd=,
return name[algorithm-1]; /St d6B*
} (.~,I+Cz'
tSX,*cz
public static void sort(int[] data, int algorithm) { [A'9sxG
impl[algorithm-1].sort(data); ijeas<
} $wm8N.I3I
K<vb4!9Z9
public static interface Sort { ?WBA:?=$58
public void sort(int[] data); 9jJ:T$}
} K)P].htw
F7&Oc)f"B
public static void swap(int[] data, int i, int j) { lEC91:Jyt
int temp = data; Ih_=yk
data = data[j]; )YPut.
data[j] = temp; jmr1e).];
} +5N09$f;R
} 1$v1:6