[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; zrWkz3FN
} iO)FZ%?"
int i1=l; 4viP lO
int i2=mid+1; dGU io?
for(int cur=l;cur<=r;cur++){ RM8p[lfX
if(i1==mid+1) 'xi[- -
data[cur]=temp[i2++]; ;Ll/rJ:*
else if(i2>r) Gj^JpG
data[cur]=temp[i1++]; `,XCD-R^
else if(temp[i1] data[cur]=temp[i1++]; \^O#)&5 V
else WVUa:_5{
data[cur]=temp[i2++]; c+:LDc3!Gb
} m%Ah]x;
} AsyJDt'i
K]4XD1n7
} +.gM"JV
ns|)VX
改进后的归并排序: )&R^J;W$M1
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package org.rut.util.algorithm.support; \~|+*^e)
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import org.rut.util.algorithm.SortUtil; q 65mR!)
|F_Z
/** \8v{9Yb
* @author treeroot &VG|*&M
* @since 2006-2-2 *"4d6
* @version 1.0 dLb9p"EE#
*/ \mRRx#-r%
public class ImprovedMergeSort implements SortUtil.Sort { Y0`@$d&n
nA:\G":\y
private static final int THRESHOLD = 10; GRV#f06
T=6fZ;7
/* =\;yxl
* (non-Javadoc) $89hkUuTu^
* zs!}P
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) am>X7
*/ EugQr<sM#
public void sort(int[] data) { ~^#F5w"
int[] temp=new int[data.length]; /5 rWcX
mergeSort(data,temp,0,data.length-1); tmM8YN|
} gd~# uR\
> <cK
private void mergeSort(int[] data, int[] temp, int l, int r) { ATq)8Rm\
int i, j, k; hs'J'~a
int mid = (l + r) / 2; wfr+-
if (l == r) g wM~W
return; ,})x1y
if ((mid - l) >= THRESHOLD) "Uy==~
mergeSort(data, temp, l, mid); HZ$q`e
else &w@~@]
insertSort(data, l, mid - l + 1); fAMJFHW
if ((r - mid) > THRESHOLD) e_3KNQ`kA
mergeSort(data, temp, mid + 1, r); L@> +iZSO
else H]v"_!(\
insertSort(data, mid + 1, r - mid); (ATvH_Z
Y@WCp
for (i = l; i <= mid; i++) { ?U~}uG^
temp = data; q}Wd`>VDR
} QIl![%
for (j = 1; j <= r - mid; j++) { 2p3ep,
temp[r - j + 1] = data[j + mid]; " jefB6k9h
} -cW`qWbd
int a = temp[l]; xsjJ8>G
int b = temp[r]; .O9A[s<
for (i = l, j = r, k = l; k <= r; k++) { 2K/+6t}
if (a < b) { pyPS5vWG
data[k] = temp[i++]; Of|e]GR
a = temp; = ~{n-rMF
} else { Sb_T _m
data[k] = temp[j--]; a|B^%
b = temp[j]; XRU^7@Ylks
} 9d ZE#l!Q
} slSQ\;CDA
} AEx|<E0
UPtWj8h
/** xgl~4
* @param data eM)E3~K:2
* @param l NXhQdf
* @param i W`zY\]
*/ :/e=J
private void insertSort(int[] data, int start, int len) { ).+!/x
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); cp|&&q
} ![O@{/
} IEb"tsel
} K*&?+_v :
} ]V9z)uz
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堆排序： RfPRCIo
I"*;fdm
package org.rut.util.algorithm.support; }@Mx@ S
0>D:
import org.rut.util.algorithm.SortUtil; D8+68_BEM
z?~W]PWiZ
/** i*16kdI.
* @author treeroot 6`LC(Nv%-n
* @since 2006-2-2 C9oF*{
* @version 1.0 |JVeW[C
*/ !oXA^7Th6]
public class HeapSort implements SortUtil.Sort{ #UN(R
U'iL|JRF
/* (non-Javadoc) .*H0{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^/+0L[R
*/ 7h?yAgDv~
public void sort(int[] data) { r.e,!Bs
MaxHeap h=new MaxHeap(); ,z}wR::%
h.init(data); o6e6Jw
for(int i=0;i h.remove(); Q>gU(
System.arraycopy(h.queue,1,data,0,data.length); B"O5P>
} FrSeR9b
[ e4)"A"
private static class MaxHeap{ !x9j~D'C`
9g" 1WZ!
void init(int[] data){ &dSw[C#f
this.queue=new int[data.length+1]; @Yua%n6]#D
for(int i=0;i queue[++size]=data; HLMEB0zh^
fixUp(size); c`UJI$Q/
} 1XZ|}Xz
} ]Y[8|HJ8
b@J&jE~d
private int size=0; rQNT
m,nV,}@J
private int[] queue; )=\W sQ
UXB[3SP
public int get() { SU, t,i
return queue[1]; 5G8`zy
} LkFXUt?
kP%Hg/f/Ot
public void remove() { Xq&x<td
SortUtil.swap(queue,1,size--); HF-Msu6
fixDown(1); t`{^gt
} sV7dgvVd
file://fixdown lj"L Q(^
private void fixDown(int k) { P=&Je?
int j; *VT@
while ((j = k << 1) <= size) { "m]"%MU78
if (j < size %26amp;%26amp; queue[j] j++; WG 9f>kE
if (queue[k]>queue[j]) file://不用交换 to Ei4u)m
break; (^g?/i1@d
SortUtil.swap(queue,j,k); !x.^ya
k = j; &?3?8Q\
} _C?<re3*
} R<mLG $
private void fixUp(int k) { |dNtM^
while (k > 1) { ZNPzQ:I@
int j = k >> 1; /2oTqEqaV
if (queue[j]>queue[k]) vCwDE~
break; ?,r bD1
SortUtil.swap(queue,j,k); "fLGXbNQ
k = j; [d!C6FT
} @18@[ :d"
} xM%E;
{xt<`_R
} yy?|q0
] K7>R0
} ?Gl'-tV
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SortUtil： 6<H[1PI`,G
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package org.rut.util.algorithm; @6GM)N\{[
7|6tH@4Ub
import org.rut.util.algorithm.support.BubbleSort; uqZLlP#&#
import org.rut.util.algorithm.support.HeapSort; bl\44VK2'
import org.rut.util.algorithm.support.ImprovedMergeSort; $X5~9s1Wl
import org.rut.util.algorithm.support.ImprovedQuickSort; 8aGZ% UI
import org.rut.util.algorithm.support.InsertSort; MAR kTxzi
import org.rut.util.algorithm.support.MergeSort; l1c&a[M)
import org.rut.util.algorithm.support.QuickSort; C5Q|3d
import org.rut.util.algorithm.support.SelectionSort; #I@]8U#,":
import org.rut.util.algorithm.support.ShellSort; (~pcPGUG
8{Y ?;~G
/** (?R
* @author treeroot ~U8#Iq1
* @since 2006-2-2 ;-=y}DK
* @version 1.0 nvD"_.KrJ
*/ 1L'[DKb'
public class SortUtil { ^Gv<Xl
public final static int INSERT = 1; sVkR7 ^KsG
public final static int BUBBLE = 2; XrC{{K
public final static int SELECTION = 3; {R8Q`2R
public final static int SHELL = 4; Wnl8XHPn
public final static int QUICK = 5; !5`}s9hsF_
public final static int IMPROVED_QUICK = 6; h. i&[RnX
public final static int MERGE = 7; LH4-b-
public final static int IMPROVED_MERGE = 8; L5yxaF{]
public final static int HEAP = 9; QAi(uL5
Yx&cnDx
public static void sort(int[] data) { J+\F)k>r
sort(data, IMPROVED_QUICK); ,@='.Qs4g
} 8<P$E!
private static String[] name={ 2xe_Q70II
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" kVU|k-?2
}; OJ UM Y<5
=&"Vf!7YR7
private static Sort[] impl=new Sort[]{ D0i84I`Z%
new InsertSort(), :G^`LyOM
new BubbleSort(), ENC_#-1x
new SelectionSort(), =(v!pEF
new ShellSort(), SX^fh.
new QuickSort(), 94APjqV6'
new ImprovedQuickSort(), w^|,[G^}H
new MergeSort(), X3L9j(
new ImprovedMergeSort(), w#F+rh3
new HeapSort() j)-D.bY0
}; ZX-9BJ`Q
jT::o
public static String toString(int algorithm){ (6+6]`c$
return name[algorithm-1]; 8fM}UZI
} }C*o;'o5G
K- }k-S
public static void sort(int[] data, int algorithm) { `r*6P^P
impl[algorithm-1].sort(data); q'(WIv@
} !+uMH!
'dWJ#9C
public static interface Sort { phXVuQ
public void sort(int[] data); ZX'{o9+w5
} h| UT/:
IU$bP#<
public static void swap(int[] data, int i, int j) { {'DP/]nK
int temp = data; +"3eh1q[
data = data[j]; -&)^|Atm
data[j] = temp; IJ4"X#Q/
} lR.a3.~
} ynOp7ZN$