[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; O\L(I079
} <ZJ>jZV0*
int i1=l; i&^?p|eKa
int i2=mid+1; G:.Nq,513
for(int cur=l;cur<=r;cur++){ kNW&rg
if(i1==mid+1) t%Z_*mIfmE
data[cur]=temp[i2++]; ??rx\*,C</
else if(i2>r) ,z)7rU`
data[cur]=temp[i1++]; l%"eQ
else if(temp[i1] data[cur]=temp[i1++]; `}F=Zjy
else 0+O)~>v
data[cur]=temp[i2++]; J-fU,*Bk
} c7IgndVAV
} jow^~
\PzC:H
} !&C8y
oJ`ih&Q8
改进后的归并排序: `"m"qUd
gv;=Yhw.c
package org.rut.util.algorithm.support; ?x@BZe
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import org.rut.util.algorithm.SortUtil; M~7?m/Wj
3Fh<%<=
/** :*1Gs,
* @author treeroot `4Z#/g
* @since 2006-2-2 8&VwAo
* @version 1.0 L.15EXAB
*/ %|Vo Zx ^
public class ImprovedMergeSort implements SortUtil.Sort { eF"7[_+D
1,W%t\D
private static final int THRESHOLD = 10; "Q+'lA[}
2s EdN$O
/* Xt'R@"H<V9
* (non-Javadoc) L]#J?lE&
* Ydmz!CEu
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) oC U8;z
*/ gsc*![N
public void sort(int[] data) { /w!b2KwV
int[] temp=new int[data.length]; nP?(9;3*
mergeSort(data,temp,0,data.length-1); p7!q#o
} P-No;/!B#
`S<uh9/
private void mergeSort(int[] data, int[] temp, int l, int r) { (H+'sf^h
int i, j, k; 5Zn3s()
int mid = (l + r) / 2; vsoj] R$C
if (l == r) [_qBp:_j?s
return; Z|d_G}
if ((mid - l) >= THRESHOLD) }tx~y-QQ
mergeSort(data, temp, l, mid); >S{1=N@Ev=
else sXl7
insertSort(data, l, mid - l + 1); >Q+a'bd w
if ((r - mid) > THRESHOLD) d"5:/Mo
mergeSort(data, temp, mid + 1, r); I_#)>%H
else +U+c]Xgt
insertSort(data, mid + 1, r - mid); "=|yM~V
Ff& VBm
for (i = l; i <= mid; i++) { \{G6!dV|S
temp = data; ^gkyi/z
} 8c__ U<
for (j = 1; j <= r - mid; j++) { oLX6w
temp[r - j + 1] = data[j + mid]; 5jy>)WqK
} QsDab4
int a = temp[l]; vD1jxk'fd
int b = temp[r]; BD=;4SLT
for (i = l, j = r, k = l; k <= r; k++) { )R,*
if (a < b) { %<DRrKt
data[k] = temp[i++]; f|6%71
a = temp; Z/;rM8[{&
} else { o|alL-
data[k] = temp[j--]; ;=)CjC8)
b = temp[j]; )OH!<jW
} uVu`TgbZ
} ]pb;q(?^
} [rPW@|^5
_BtlO(0&
/** _V:D7\Gs
* @param data S~/iHXm
* @param l 1Q?hskL
* @param i x6,S#p
*/ 6/@ cP/
private void insertSort(int[] data, int start, int len) { .Ji r<"*<
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); {Fb)Z"8]
} ej%C<0/%n
} \~y>aYy
} 1oX"}YY1
} ~Zaxn~u:
sur2Mw(M"
堆排序： rM bb%d:
,=6Eju#P
package org.rut.util.algorithm.support; @[ :sP
zq4mT;rqz
import org.rut.util.algorithm.SortUtil; Cn28&$:J
L<8y5B~W
/** e|MyA?`
* @author treeroot e>z7?"N
* @since 2006-2-2 x:l`e:`y9
* @version 1.0 4eaC18?
*/ 4f"be
public class HeapSort implements SortUtil.Sort{ VIi|:k
L1rov
/* (non-Javadoc) !0Q(x
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) U}Xc@- \ ?
*/ %WCpn<)
public void sort(int[] data) { |UR.7rOV
MaxHeap h=new MaxHeap(); 8zVXQ!'
h.init(data); &]vd7Q.t
for(int i=0;i h.remove(); JxD@y}ZYE
System.arraycopy(h.queue,1,data,0,data.length); 'Fc&"(!||
} X% _~9'#%
8<.KWr
private static class MaxHeap{ 5YC(gv3/
$yCj80m\
void init(int[] data){ =C#,aoa!
this.queue=new int[data.length+1]; 4vBbP;ELWq
for(int i=0;i queue[++size]=data; mH8s'F
fixUp(size); &|{K*pNa
} o~iL aN\+
} })!n1kt
ARU,Wtj#
private int size=0; e2B~j3-?z
j./bVmd.
private int[] queue; eyAg\uuih
&S|laqH
public int get() { JHO9d:{-
return queue[1]; 2d3wQ)2
} SxH}/I|W
,#WXAAmm
public void remove() { m,up37-{
SortUtil.swap(queue,1,size--); %eT/:I
fixDown(1); x!YfZ*
} qHHWe<}OT
file://fixdown ,vN#U&RS
private void fixDown(int k) { ( I,V+v+{Y
int j; ;H\,w/E9
while ((j = k << 1) <= size) { #d|.BxH
if (j < size %26amp;%26amp; queue[j] j++; 1^Caz-
if (queue[k]>queue[j]) file://不用交换 slQKkx \Dn
break; Kw?,A
SortUtil.swap(queue,j,k); W%h<@@c4,
k = j; /+IR^WG#C}
} n$=n:$`q
} BC4u,4S
private void fixUp(int k) { a[#4Oq/t$
while (k > 1) { f%@Y XGf
int j = k >> 1; t"BpaA^gO
if (queue[j]>queue[k]) Hpsg[d)!
break; ;TW@{re
SortUtil.swap(queue,j,k); ,2kWj7H%7
k = j; c"QH-sE
} *i$+i
} Wq>j;\3b3
=3J~Fk
} BO[A1'>
uox;PDK
} Y0eu^p)
}'X}!_9w>
SortUtil： `$#64UZ>U1
-#Wc@\;
package org.rut.util.algorithm; K1+,y1c
h2BD?y
import org.rut.util.algorithm.support.BubbleSort; Bo~wD|E2
import org.rut.util.algorithm.support.HeapSort; 4< H-ol
import org.rut.util.algorithm.support.ImprovedMergeSort; [R Ch7FE23
import org.rut.util.algorithm.support.ImprovedQuickSort; , 1`eH[
import org.rut.util.algorithm.support.InsertSort; 49kY]z|"w
import org.rut.util.algorithm.support.MergeSort; yNN2}\[.
import org.rut.util.algorithm.support.QuickSort; oNEU?+
import org.rut.util.algorithm.support.SelectionSort; <$=8'$T81
import org.rut.util.algorithm.support.ShellSort; TLV)mCZ
x208^=F\\
/** |owhF
* @author treeroot (h%wO
* @since 2006-2-2 i$NnHj|
* @version 1.0 jgO{DNe(=
*/ )O+9v}2
public class SortUtil { 5GRN1Aov<
public final static int INSERT = 1; nC*/?y*9
public final static int BUBBLE = 2; Ugs<WVp$
public final static int SELECTION = 3; $qEJO=v
public final static int SHELL = 4; -51L!x}1c
public final static int QUICK = 5; }=L >u>cP
public final static int IMPROVED_QUICK = 6; uC}YKT>V7
public final static int MERGE = 7; '%~zu]f'
public final static int IMPROVED_MERGE = 8; 2KzKNe(
public final static int HEAP = 9; 1R:h$*-z
<T&$1m{
public static void sort(int[] data) { --/ .
sort(data, IMPROVED_QUICK); P]x@h
} O;zW'*c+
private static String[] name={ T-x`ut7c
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" aY?}4Bx
}; P$oa6`%l
]O\6.>H
private static Sort[] impl=new Sort[]{ L_A|
new InsertSort(), L NE]#8ue
new BubbleSort(), {&4qknPd%
new SelectionSort(), $Z,+aLmb
new ShellSort(), Q^F-8
new QuickSort(), ilHj%h*z
new ImprovedQuickSort(), hFjW.~B
new MergeSort(), @Ab<I
new ImprovedMergeSort(), v>e4a/
new HeapSort() Y{S/A*X
}; );*GOLka
D0-e,)G}V,
public static String toString(int algorithm){ dy0!Zz
return name[algorithm-1]; 0b|!S/*A3
} O4#zsr:"
5QT9
public static void sort(int[] data, int algorithm) { lWdE^-
impl[algorithm-1].sort(data); tDwXb>
} '-~86Q
+pV3.VMH0
public static interface Sort { 1|]-F;b
public void sort(int[] data); ,L^L uw'7
} QJTC@o
Zsuh8t
public static void swap(int[] data, int i, int j) { "8rP?B(
int temp = data; ILpB:g
data = data[j]; J|b1 K]
data[j] = temp; &0lNj@/
} kP6r=HH@
} l&yR-FJ7KY