[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; {=VauF
} :%~+&qS
int i1=l; MS)(\&N
int i2=mid+1; /{#1w\
for(int cur=l;cur<=r;cur++){ |MY6vRJ(
if(i1==mid+1) .n'z\]-/Q
data[cur]=temp[i2++]; ppP7jiGo
else if(i2>r) bzz=8n
data[cur]=temp[i1++]; =0cyGo
else if(temp[i1] data[cur]=temp[i1++]; -y;SR+
else WgF Xv@Jjt
data[cur]=temp[i2++]; 7;ZSeQyC
} +pURF&Pr
} ^(r?k_i/
Yh\} i
} 0.Pd,L(
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改进后的归并排序: *W~+Nho.A
]#z^[XG
package org.rut.util.algorithm.support; <nOK#;O)
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import org.rut.util.algorithm.SortUtil; f$[6]7P
fH-V!QYGF
/** TL lR"L5
* @author treeroot A M8bem~
* @since 2006-2-2 o|FRG{TJ
* @version 1.0 p)NhV
*/ WLqwntzk
public class ImprovedMergeSort implements SortUtil.Sort { 96x0'IsaG
apPn>\O
private static final int THRESHOLD = 10; [Dni>2@0
cD{I*t$
/* Y5M>&}N
* (non-Javadoc) BR;f!
* OsAH!e
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) n@r'b{2;l
*/ Q[O[,Rk
public void sort(int[] data) { F?TxViL
int[] temp=new int[data.length]; Z6#}6Y{
mergeSort(data,temp,0,data.length-1); L?T%;VdG'>
} wyvrNru<l4
-*t4(wT|j
private void mergeSort(int[] data, int[] temp, int l, int r) { 794V(;sW,
int i, j, k; g&I/b/A
int mid = (l + r) / 2; ~vgm;O
if (l == r) zBg>I=hiG
return; &>y[5#qOl
if ((mid - l) >= THRESHOLD) r*'a-2Au
mergeSort(data, temp, l, mid); hY XH9:
else k\rzvo=U
insertSort(data, l, mid - l + 1); Rl@k~;VV
if ((r - mid) > THRESHOLD) Pi7vuOJr8
mergeSort(data, temp, mid + 1, r); pVbgjJI
else W=fs"<
insertSort(data, mid + 1, r - mid); xO"fg9a
gIa/sD2m>
for (i = l; i <= mid; i++) { ASME~]]?
temp = data; c~bi ~ f
} tp"dho
for (j = 1; j <= r - mid; j++) { %QH "x`;
temp[r - j + 1] = data[j + mid]; qP@d)XRQ
} ^o^[p %
int a = temp[l]; r^3/Ltd5/
int b = temp[r]; #Ux*":
for (i = l, j = r, k = l; k <= r; k++) { GAG=4g
if (a < b) { QwPLy O
data[k] = temp[i++]; .4DX/~F
a = temp; n<\ WVi
} else { 2~[f<N
data[k] = temp[j--]; c@H:?s!0R
b = temp[j]; _' KJ:3e
} 8G@Ie
} ;T6{J[ h
} U"\$k&
wi]ya\(*yl
/** t:y} 7un
* @param data 7 $AEh+f
* @param l ernZfd{H
* @param i ".aypD)W
*/ pt[H5
private void insertSort(int[] data, int start, int len) { MR:GH.uM:
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); mqxgrb7
} *9V;;bY#
} ~gU.z6us
} >b9nc\~
} ]*b}^PQM^
hwgLJY?
堆排序： ~a@O1MB
1 ?X(q
package org.rut.util.algorithm.support; @n<y[WA
L,G{ t^j
import org.rut.util.algorithm.SortUtil; Ucnj7>+"
wV\;,(<x=%
/** a|aRUxa0"
* @author treeroot H{}0-0o
* @since 2006-2-2 f`Km ctI
* @version 1.0 lFvRXV^+f
*/ :6R0=oz
public class HeapSort implements SortUtil.Sort{ hF`e>?bN
W[B%,Km%]
/* (non-Javadoc) pe(31%(h
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %g1{nGah
*/ "p]bsJG
public void sort(int[] data) { `R:p-"'b
MaxHeap h=new MaxHeap(); *6uZ"4rb.
h.init(data); R7axm<PR=
for(int i=0;i h.remove(); =fA*b
System.arraycopy(h.queue,1,data,0,data.length); ?M2#fD]e
} !&4<"wQ
"XQj~L
private static class MaxHeap{ }<?1\k
9nW/pv
void init(int[] data){ %N}OMc.W
this.queue=new int[data.length+1]; yVds2J'w-
for(int i=0;i queue[++size]=data; QUa_gYp0v
fixUp(size); g-B~"tp
} `>M;f%s
} c6zghP3dR
v.Fq.
private int size=0; b'i-/l$
B<)c{kj
private int[] queue; oy+``W~
/JaCbT?*T
public int get() { BGAqg=nDV
return queue[1]; QEd>T"@g
} &n:3n
r2:n wlG
public void remove() { Ec!fx\
SortUtil.swap(queue,1,size--); GS),rNBur
fixDown(1); "r@f&Ssxb
} G55-{y9Q
file://fixdown B_;W!
private void fixDown(int k) { BI9~%dm
int j; f n]rMH4>
while ((j = k << 1) <= size) { kaSi sjd
if (j < size %26amp;%26amp; queue[j] j++; @ s
if (queue[k]>queue[j]) file://不用交换 h4@v.GI
break; InI^,&<
SortUtil.swap(queue,j,k); WH`E=p^x4
k = j; pUs:r0B
} {a>a?fVU
} (dSf>p r2
private void fixUp(int k) { H8^U!"~E
while (k > 1) { IYtM'!u
int j = k >> 1; 4=]CAO=O
if (queue[j]>queue[k]) CH |A^!Zm
break; OGmOk>_
SortUtil.swap(queue,j,k); Z7 \gj`
k = j; zk)9tm;i{
} Q_p!;3
} 7D5;lM[_
p7.j>w1F
} pz'l9Gp;@
\etuIFQ#U
} hD OEJ
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SortUtil： 7MX nt5qUh
AiUICf?{
package org.rut.util.algorithm; (e>.hfrs
WJH)>4M#
import org.rut.util.algorithm.support.BubbleSort; ;Od;q]G7L
import org.rut.util.algorithm.support.HeapSort; a3o4> 9
import org.rut.util.algorithm.support.ImprovedMergeSort; hg8gB8Xq
import org.rut.util.algorithm.support.ImprovedQuickSort; t\[aU\4-7
import org.rut.util.algorithm.support.InsertSort; ] r8 hMv
import org.rut.util.algorithm.support.MergeSort; " oWiQ{\IP
import org.rut.util.algorithm.support.QuickSort; <28L\pdG`
import org.rut.util.algorithm.support.SelectionSort; }%j@%Ep[
import org.rut.util.algorithm.support.ShellSort; 3hzI6otKS
AEjkqG4qv
/** ts2;?`~
* @author treeroot Z4eu'.r-y~
* @since 2006-2-2 [/.5{|&GSt
* @version 1.0 iUcDj:
*/ eBZ^YY<*g
public class SortUtil { hdFIriE3
public final static int INSERT = 1; m%8idjnG
public final static int BUBBLE = 2; -#yLH
public final static int SELECTION = 3; eK }AVz}k
public final static int SHELL = 4; &<{=
public final static int QUICK = 5; YuO-a$BP
public final static int IMPROVED_QUICK = 6; JXR_klx
public final static int MERGE = 7; g.CUo:c
public final static int IMPROVED_MERGE = 8; A]VcQ_e
public final static int HEAP = 9; C)2Waj}
JaC =\\B
public static void sort(int[] data) { .gPE Qc+D
sort(data, IMPROVED_QUICK); k!/"J ;
} zbL!q_wO
private static String[] name={ r[P5 ufy2]
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" G]q1_q4P1?
}; XwlAW7lU=
<OG rC .k}
private static Sort[] impl=new Sort[]{ }m6zu'CV
new InsertSort(), {fsU(Jj\
new BubbleSort(), 'B;aXy/JC
new SelectionSort(), >BC?%|l
new ShellSort(), oH/6
new QuickSort(), j(j o8
new ImprovedQuickSort(), ;F)gr
new MergeSort(), 5l"EQ9
new ImprovedMergeSort(), sP1wO4M?{
new HeapSort() n-q
}; ?y( D_NtL
$4yv)6G
public static String toString(int algorithm){ v?Q|;<
return name[algorithm-1]; } $:uN
} OLAwRha
2t h\%
public static void sort(int[] data, int algorithm) { rDNz<{evj
impl[algorithm-1].sort(data); A?{ X5`y
} %vPs38Fks
_C`cO
public static interface Sort { F<8Rr#Z
public void sort(int[] data); Ax[!7~s
} 1i;-mYGaMn
i?R+Ul`Q
public static void swap(int[] data, int i, int j) { xpo<1Sr>S
int temp = data; = ;sEi:HC
data = data[j]; (;1FhIi&
data[j] = temp; :[#g_*G@p
} #V4kT*2P)
} cU\Er{ k