[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; lBbUA)z6
} jI-\~
int i1=l; ]Ywj@-*q
int i2=mid+1; `H_.<``>
for(int cur=l;cur<=r;cur++){ P2q'P&
if(i1==mid+1) `pHlGbrW
data[cur]=temp[i2++]; LZ97nvK
else if(i2>r) km)5?
data[cur]=temp[i1++]; .fQ/a`AsU
else if(temp[i1] data[cur]=temp[i1++]; 4!%TY4bJ
else HR/"Nwr
data[cur]=temp[i2++]; XpFoSW#K
} E7_)P>aS5
} HH\6gs]u
b?p_mQKtZ
} rM sd)
Kn WjP21
改进后的归并排序: lO Rym:P
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package org.rut.util.algorithm.support; qM."W=XVN
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import org.rut.util.algorithm.SortUtil; :|GC~JElo5
W' DpI7
/** C Rd1zDB
* @author treeroot BRTM]tRZ
* @since 2006-2-2 F)W7,^=X>-
* @version 1.0 VUo7Evc:.P
*/ _o 2pyV&
public class ImprovedMergeSort implements SortUtil.Sort { kiW|h)w_,v
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private static final int THRESHOLD = 10; "1<>c/h
<`B4+:;w6
/* |Ew~3-u!
* (non-Javadoc) %[x oA)0!
* d:U2b"k=/u
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) YPjjSi:#
*/ K%XQdMv
public void sort(int[] data) { $yZ(c#L
int[] temp=new int[data.length]; ;W/K7}
mergeSort(data,temp,0,data.length-1); \Bg;^6U
} ),G?f {`!
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private void mergeSort(int[] data, int[] temp, int l, int r) { #s'UA!)
int i, j, k; 36NENzK
int mid = (l + r) / 2; Q: H`TSR]
if (l == r) !N`$`qAK
return; G lz0`z
if ((mid - l) >= THRESHOLD) {HJzhIgCf
mergeSort(data, temp, l, mid); (1 L9K;
else 4`x.d
insertSort(data, l, mid - l + 1); 'Xl_,;W]
if ((r - mid) > THRESHOLD) x6, #Jp
mergeSort(data, temp, mid + 1, r); /EN3>25"#
else *1}UK9X;
insertSort(data, mid + 1, r - mid); O#}'QZd'
i; 8""A
for (i = l; i <= mid; i++) { -P+@n)?T6
temp = data; CaSoR |
} ;"*\R5a
for (j = 1; j <= r - mid; j++) { b'D|p/)m0S
temp[r - j + 1] = data[j + mid]; &a'H vQV
} 9q?\F
int a = temp[l]; {^r8uKo:~
int b = temp[r]; q8j W&_
for (i = l, j = r, k = l; k <= r; k++) { *PXlbb
if (a < b) { )FNvtLZ
data[k] = temp[i++]; $.a4Og2
a = temp; y>:-6)pv
} else { j89C~xP6
data[k] = temp[j--]; i\2d1Z
b = temp[j]; cJ6n@\
} #cN0ciCT'
} 7e{w)m:A
} 5hVp2w-
GI&XL'K&
/** =@98Gl9!
* @param data E>/kNl
* @param l .L,xqd[zC
* @param i N36<EHq
*/ S,K'y?6
private void insertSort(int[] data, int start, int len) { ^-s'Ad3
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); I:6N?lD4}0
} IoEITKd
} >dnH
} UDJ{iZ
} Ueq*R(9>
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堆排序： g]'RwI
oKl^Ttr
package org.rut.util.algorithm.support; TRQ@=.
[n[!RddY
import org.rut.util.algorithm.SortUtil; QB<9Be@e
3GH@|id
/** wVI 1sR
* @author treeroot s Zan.Kc#
* @since 2006-2-2 ;TaR1e0
* @version 1.0 N;<.::x
*/ yfBVy8Sm
public class HeapSort implements SortUtil.Sort{ \DP*?D_}?
)c'5M]V
/* (non-Javadoc) Ca: jN0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Tgpf0(
*/ j,q8n`@
public void sort(int[] data) { V3<baxdE
MaxHeap h=new MaxHeap(); y*Egt`W
h.init(data); #6XN_<
for(int i=0;i h.remove(); B{\cV-X$0
System.arraycopy(h.queue,1,data,0,data.length); ohK_~
} >^cP]gGY
%SV5PO@
private static class MaxHeap{ A!([k}@=j
;Up'+[Vj'C
void init(int[] data){ {-(}p+;z
this.queue=new int[data.length+1]; ZI'MfkEZ*
for(int i=0;i queue[++size]=data; A]fN~PR
fixUp(size); 7j9:s>D
} Yx- 2ux
} 0mJvoz\j8
K;%P_f/KJP
private int size=0; KO`ftz3 +
k7rFbrLZ
private int[] queue; % D]vKv~<
zTDB]z!A
public int get() { Hzr<i4Y=w9
return queue[1]; t>D|1E"
} %SKp<>;9
Uu~7+oaQ
public void remove() { <h(KIY9T
SortUtil.swap(queue,1,size--); tx$kD2
fixDown(1); P8tpbdZE-
} l+6y$2QR
file://fixdown }T@^wY_Ow
private void fixDown(int k) { J%G EIe|
int j; 9(;5!q,Gsg
while ((j = k << 1) <= size) { ~F?vf@k
if (j < size %26amp;%26amp; queue[j] j++; /az}<r8
if (queue[k]>queue[j]) file://不用交换 .A;e`cKb
break; _[zZm*
SortUtil.swap(queue,j,k); X$o$8s
k = j; oF1{/ERS
} Kjw4,z%\94
} `1|#Za~e
private void fixUp(int k) { _ZM$&6EC
while (k > 1) { .Dn.|A
int j = k >> 1; pmm?Fq!s=
if (queue[j]>queue[k]) U} EaV<
break; 2nSX90@:
SortUtil.swap(queue,j,k); ;x 9_
k = j; en"]u,!
} {!? @u?M
} !N\<QRb\q
_zAHN0d
} wul$lJ?tE
K?;_T$^K
} T&M*sydA
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SortUtil： tUS)1*{_
]V|rOtxb
package org.rut.util.algorithm; 3[R<JrO
H .F-mm
import org.rut.util.algorithm.support.BubbleSort; zV)(i<Q
import org.rut.util.algorithm.support.HeapSort; K gN=b
import org.rut.util.algorithm.support.ImprovedMergeSort; RrFq"
import org.rut.util.algorithm.support.ImprovedQuickSort; Rne#z2Ok
import org.rut.util.algorithm.support.InsertSort; 8v$2*$
import org.rut.util.algorithm.support.MergeSort; XJx$HM&0M
import org.rut.util.algorithm.support.QuickSort; $uw[X
import org.rut.util.algorithm.support.SelectionSort; DtXQLL*fl(
import org.rut.util.algorithm.support.ShellSort; $;kFuJF
!Zowe*`
/** (mO{W
* @author treeroot j_` [Z
* @since 2006-2-2 s}2TJa
* @version 1.0 !+sC'/
*/ RMinZ}/
public class SortUtil { s)Gnj;
public final static int INSERT = 1; IM.sW'E
public final static int BUBBLE = 2; nkI+"$Rz0
public final static int SELECTION = 3; _n6ge*,E
public final static int SHELL = 4; 8Ld`$_E
public final static int QUICK = 5; j-l#n&M
public final static int IMPROVED_QUICK = 6; 9Fo00"q
public final static int MERGE = 7; L1'PQV
public final static int IMPROVED_MERGE = 8; ;^XF;zpg
public final static int HEAP = 9; 12 8aJ
H1?t2\V4
public static void sort(int[] data) { [v@3|@
sort(data, IMPROVED_QUICK); xJG&vOf;?
} -^1}J
private static String[] name={ 8Zj=:;
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" N>R\,n|I
}; 3.i$lp`t
#?x!:i$-
private static Sort[] impl=new Sort[]{ Ck:RlF[6C
new InsertSort(), to2;. ~X
new BubbleSort(), r]h>Bb
new SelectionSort(), '}4z=f`}
new ShellSort(), mS\gh)<h
new QuickSort(), VI xGD#m
new ImprovedQuickSort(), ldd8'2
new MergeSort(), -cgLEl1J
new ImprovedMergeSort(), v|!u]!JM
new HeapSort() myq@X(K
}; s$%t*T2J>
Ro}7ERA
public static String toString(int algorithm){ cTC -cgp
return name[algorithm-1]; +8<|P&fH
} )b%t4~7
Lud[.>i
public static void sort(int[] data, int algorithm) { f ZEyXb
impl[algorithm-1].sort(data); A-n@:` n~
} Mi>!
lu_kir~
public static interface Sort { gxKL yZO!
public void sort(int[] data); :Dt]sE_d
} [b2KBww\
.uh>S!X, ]
public static void swap(int[] data, int i, int j) { ]%%I=r
int temp = data; Z\YCjs%
data = data[j]; 7 XNZEi9o
data[j] = temp; Ow#a|@
} ]_"c_QG
} X!aC6gujOH