[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; K|.!)L
} !Ly1!;<
int i1=l; j,#R?Ig
int i2=mid+1; 7,3v,N|
for(int cur=l;cur<=r;cur++){ IF|%.%I$!U
if(i1==mid+1) I^S{V^Ty
data[cur]=temp[i2++]; &qZ:"k
else if(i2>r) |*zvaI(}
data[cur]=temp[i1++]; YQ5d!a.
else if(temp[i1] data[cur]=temp[i1++]; 2LH.If
else #NWc<Dd
data[cur]=temp[i2++]; /f -\ 3
} JC4Z^/\.
} }C&kzJBEF
+K[H!fD
} j(\jYH>
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改进后的归并排序: ^v@& q
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package org.rut.util.algorithm.support; kam\dn04
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import org.rut.util.algorithm.SortUtil; >HQ<KFA
c(0Ez@
/** 1 *$-.
* @author treeroot Q?W}]RW
* @since 2006-2-2 1FmVx
* @version 1.0 cGe-|>:
*/ JU0|pstf
public class ImprovedMergeSort implements SortUtil.Sort { ^ZO3:"t!w
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private static final int THRESHOLD = 10; %R1$M318
-j"2rIl4#
/* l&v&a!EU
* (non-Javadoc) ZNG{:5u,
* 6o]X.plr
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) k%lz%r
*/ }4"T# [n#
public void sort(int[] data) { F#XzhDs
int[] temp=new int[data.length]; ~UV$(5&-
mergeSort(data,temp,0,data.length-1); ,Mw;kevw
} $9O%,U@
yn-TN_/Y,
private void mergeSort(int[] data, int[] temp, int l, int r) { \~'+TW
int i, j, k; P[C03a!lXg
int mid = (l + r) / 2; D[}qhDlX
if (l == r) VcR(9~
return; kc70HrG
if ((mid - l) >= THRESHOLD) S`GM#(t@_
mergeSort(data, temp, l, mid); !RwOUCk
else o9uir"=
insertSort(data, l, mid - l + 1); =qVD"Z]z
if ((r - mid) > THRESHOLD) ?]u=5gqUU
mergeSort(data, temp, mid + 1, r); .\+%Q)?h:
else '; Z!(r
insertSort(data, mid + 1, r - mid); `@|Kx\y4=j
?AJE*=b
for (i = l; i <= mid; i++) { 0^rDf L
temp = data; *^P$^lm?S
} `.a~G y
for (j = 1; j <= r - mid; j++) { G8_|w6
temp[r - j + 1] = data[j + mid]; . 'rC'FT
} vS'5Lm
int a = temp[l]; p-o!K\o-1
int b = temp[r]; L5yv}:.U
for (i = l, j = r, k = l; k <= r; k++) { \4|o5,+(@
if (a < b) { VVyms7 VN
data[k] = temp[i++]; ~!{y3thZ
a = temp; ZJ|'$=lR
} else { _-/<bO
data[k] = temp[j--]; AjA.="3
b = temp[j]; DQOEntw
} ON<X1eU
} OAXF=V F#
} s0x;<si_
#y&O5
/** L@HWm;aN
* @param data n:wZL&ZV0
* @param l Z>zW83a
* @param i G;3N"az
*/ OwM.N+z#T
private void insertSort(int[] data, int start, int len) { 1W +QcK4k
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); oaJnLd90W
} c$HZvv
} Td6"o&0A!
} s5'So@L8
} e[a?5,s2
:F`yAB3
堆排序： WMLsKoby
xK3}zN$T
package org.rut.util.algorithm.support; 2{E"#}/
z(&~O;;N#
import org.rut.util.algorithm.SortUtil; Ho;bgva
|}>;wZ[7
/** o7W1sD1O
* @author treeroot \6U$kMGde
* @since 2006-2-2 $pg1Av7l
* @version 1.0 yl[6b1
*/ sjj*7i*
public class HeapSort implements SortUtil.Sort{ e2PM^1{_
`vPc&.-K
/* (non-Javadoc) w,QO!)j!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0'9zXJ"
*/ 5E!G
public void sort(int[] data) { >1n[Y- r
MaxHeap h=new MaxHeap(); H(TY.
h.init(data); ]TmxCTVL
for(int i=0;i h.remove(); =icynW^Fr
System.arraycopy(h.queue,1,data,0,data.length); z3:tSjF
} e):rr*
B:Xmc,|,
private static class MaxHeap{ 7#BUd/
M'4$z^@Z
void init(int[] data){ qJZ5w}
this.queue=new int[data.length+1]; 7pY7iR_
for(int i=0;i queue[++size]=data; D8''q%
fixUp(size); V 2WcPI^
} M@/Hd0$
} (;@\gRL
E5J2=xVW#
private int size=0; 8XUm.nV
V=v7<I=]
private int[] queue; 'sCj|=y2Qc
c$>$2[*=
public int get() { AGdFJ>/
return queue[1]; ,y57tY
} jw"]U jub
|4@su"OA
public void remove() { c)tG1|Og]
SortUtil.swap(queue,1,size--); voHFU#Z$
fixDown(1); WTcrfs)T
} Cd"iaiTD0
file://fixdown Zh]FL8[ nc
private void fixDown(int k) { (haYY]W\
int j; @m=xCg.Z
while ((j = k << 1) <= size) { b&V}&9'[M;
if (j < size %26amp;%26amp; queue[j] j++; LT3ViCZ-n
if (queue[k]>queue[j]) file://不用交换 RN%*3{-
break; Iw<: k
SortUtil.swap(queue,j,k); dk^Uf84.Gr
k = j; kCu"G
} ~X`_g/5X
} };:+0k/
private void fixUp(int k) { MZ{gU>K+
while (k > 1) { _8U 5mW
int j = k >> 1; pUz;e#J|
if (queue[j]>queue[k]) RnX:T)+o
break; f/Lyc=-]
SortUtil.swap(queue,j,k); mXH\z
k = j; 9y~5@/32R
} nKzS2u=:Y
} @,Iyn<v{B
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} #Wz7ju;
w)hH8jx{
} 8"zFTP*;u
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SortUtil： .qcIl)3
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package org.rut.util.algorithm; Oz[]]`C1
jx3J$5
import org.rut.util.algorithm.support.BubbleSort; =wEqI)Td
import org.rut.util.algorithm.support.HeapSort; 6tPgFa#N
import org.rut.util.algorithm.support.ImprovedMergeSort; XPhC*r
import org.rut.util.algorithm.support.ImprovedQuickSort; s 9Y'MQo*
import org.rut.util.algorithm.support.InsertSort; /2!Wy6p
import org.rut.util.algorithm.support.MergeSort; 5VU 5kiCt
import org.rut.util.algorithm.support.QuickSort; E8Jy!8/X9T
import org.rut.util.algorithm.support.SelectionSort; ?J<V-,i
import org.rut.util.algorithm.support.ShellSort; ?4kM5NtP
t@`w}o[#
/** _i=431Z40
* @author treeroot 7$l!f
* @since 2006-2-2 W]]@pbG"H\
* @version 1.0 NEpomE(>x
*/ ]}wo$7pO
public class SortUtil { _dgS@n;6
public final static int INSERT = 1; q;^Q1[Ari
public final static int BUBBLE = 2; W_%p'8,
public final static int SELECTION = 3; 8+>r!)Q+
public final static int SHELL = 4; 5u<F0$qHc
public final static int QUICK = 5; Lad8C
public final static int IMPROVED_QUICK = 6; vbo:,]T<A
public final static int MERGE = 7; 9\_^"5l
public final static int IMPROVED_MERGE = 8; ne=?'e4
public final static int HEAP = 9; _NfdJ=[Xh
&X^ -|7~N
public static void sort(int[] data) { /YP,Wfd%
sort(data, IMPROVED_QUICK); BP&T|s
} ]5V=kNui
private static String[] name={ [p+]H?(A
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" [IF5Iv\b
}; Pp*:rA"N
< )dqv0=
private static Sort[] impl=new Sort[]{ [O"9OW'2!B
new InsertSort(), k//l~A9m
new BubbleSort(), X7cqAi
new SelectionSort(), |4J ;s7us
new ShellSort(), 3KyIBrdi?
new QuickSort(), +:a#+]g
new ImprovedQuickSort(), 1%v!8$
new MergeSort(), jf`QoK
new ImprovedMergeSort(), )(?,1>k`Z
new HeapSort() jvI!BZ
}; M@k8;_5
l@ amAusE
public static String toString(int algorithm){ xnuu#@f
return name[algorithm-1]; e ej:
} lo1<t<w`
D#=$? {w
public static void sort(int[] data, int algorithm) { }#u.Of`6"
impl[algorithm-1].sort(data); b6`_;Z
} =RA8^wI
D%=VhKq
public static interface Sort { B_gzpS]
public void sort(int[] data); kqebU!0-
} lUL6L4m
mW/6FC
public static void swap(int[] data, int i, int j) { [MQU~+]
int temp = data; <}\!FuC
data = data[j]; V<:)bG4;d
data[j] = temp; 3 #8bG(
} St1Ny,$yU
} p;y\%i_