[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; s,Swlo7D!
} UwU]l17~
int i1=l; UL%ihWq
int i2=mid+1; [7V]=] p
for(int cur=l;cur<=r;cur++){ AqkK`iJ#
if(i1==mid+1) fW _.
data[cur]=temp[i2++]; 0=B5 =qyw
else if(i2>r) gISs+g
data[cur]=temp[i1++]; ${wE5^ky
else if(temp[i1] data[cur]=temp[i1++]; n&]w* (,
else BXY'%8q _a
data[cur]=temp[i2++]; sYpogFfV
} [w f12P
} [78 .%b'
@Hh"Y1B
} B}X#oA
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改进后的归并排序: 7Cf(y'w^
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package org.rut.util.algorithm.support; |xm|Q(PG
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import org.rut.util.algorithm.SortUtil; #4M0%rN
639k&"V
/** V{{x~Q9
* @author treeroot _3a 5/IZ
* @since 2006-2-2 k6BgY|0gC
* @version 1.0 R`q!~8u
*/ Oe`t!&v
public class ImprovedMergeSort implements SortUtil.Sort { \`ReZu$
^%pwyY\t
private static final int THRESHOLD = 10; sLIP|i
[2V/v
/* I.!/R`
* (non-Javadoc) 0 ,-b %X
* 7p6J
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) JuSS5_&
*/ vuBA&j0C
public void sort(int[] data) { *\", qMp
int[] temp=new int[data.length]; 8BDL{?Mu
mergeSort(data,temp,0,data.length-1); GwBQ pNjy
} |T*qAJ8c
<J-Z;r(gQN
private void mergeSort(int[] data, int[] temp, int l, int r) { QEa=!O
int i, j, k; #1@~w}Dh
int mid = (l + r) / 2; 46Nf|~
if (l == r) UmX[=D|
return; (_ah~VnO
if ((mid - l) >= THRESHOLD) ~py0Vx,F
mergeSort(data, temp, l, mid); BtChG] N|
else @U@yIv
insertSort(data, l, mid - l + 1); u2-7vudh
if ((r - mid) > THRESHOLD) 0h4}RmS
mergeSort(data, temp, mid + 1, r); ^<0NIu}
else QaR.8/xV
insertSort(data, mid + 1, r - mid); NCt sx /C
Xf9%A2 iB
for (i = l; i <= mid; i++) { RCXSz
temp = data; rrYp^xLa`
} PqLqF5`S
for (j = 1; j <= r - mid; j++) { !`o:+Gg@
temp[r - j + 1] = data[j + mid]; &tCtCk%{j
} ZnLk :6'
int a = temp[l]; T0%TeFY
int b = temp[r]; J|S^K kC
for (i = l, j = r, k = l; k <= r; k++) { 2j1v.%
if (a < b) { 3ohcHQ/a
data[k] = temp[i++]; (y*X8
a = temp; !#1A7[WN
} else { X388Gs;e
data[k] = temp[j--]; twmJ
b = temp[j]; mX@*2I
} y51D-vj
} E^a`IA
} IQe[ CcM
QYXx7h r=$
/** 5KE%@,k k
* @param data Ml?)Sc"\7
* @param l PRC)GP&q
* @param i es+_]:7B9
*/ B@inH]wq
private void insertSort(int[] data, int start, int len) { wS*CcIwj
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); cu!bg+,zl
} 9Pk3}f)a
} i03}f%JnuO
} %C0O?q
} b.q"s6u
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堆排序： GY]6#>D#7
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package org.rut.util.algorithm.support; '8kjTf#g<l
Sx9:$"3.X
import org.rut.util.algorithm.SortUtil; I{e^,oc
vr;Br-8
/** w })Pedg
* @author treeroot xWz;5=7a]
* @since 2006-2-2 _ZM9 "<M-X
* @version 1.0 XqS*;Zj0
*/ Ty0T7D
public class HeapSort implements SortUtil.Sort{ -u9yR"n\}
Tv,.
/* (non-Javadoc) qbq<O %g=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) VfqY_NmgC
*/ a {$k<@Ww
public void sort(int[] data) { 0k0c
MaxHeap h=new MaxHeap(); " IkF/
h.init(data); 76Vyhf&7
for(int i=0;i h.remove(); G4%M$LJh
System.arraycopy(h.queue,1,data,0,data.length); m4SXH> o
} :#:O(K1PW
I= h4s(
private static class MaxHeap{ 0$ 9;pzr
9'#.>Q>0=j
void init(int[] data){ e$+f~~K
this.queue=new int[data.length+1]; NwlRPyt
for(int i=0;i queue[++size]=data; *R\/#Y|
fixUp(size); xT?}wF
} _q$LrAT
} 6+nMH +[
QC5f:BwM
private int size=0; ^Z4q1i)JO
l3?,gd.-
private int[] queue; Rk jKIa
:Mu8W_
public int get() { &Dg)"Xji
return queue[1]; u4,X.3V]A
} !QR?\9`
a$zm/
public void remove() { 3^R][;
SortUtil.swap(queue,1,size--); tZu*Asx7
fixDown(1); `Ivw`}L
} $K.%un Gm
file://fixdown h3]@M$Y[
private void fixDown(int k) { Q@W|GOH3
int j; 7|M$W(P
while ((j = k << 1) <= size) { Z:lB:U'o
if (j < size %26amp;%26amp; queue[j] j++; xe gL!
if (queue[k]>queue[j]) file://不用交换 !E{GcK
break; [zTYiNa
SortUtil.swap(queue,j,k); PMN2VzE4{
k = j; Ns|V7|n]
} u->@|tEq
} OT}Yr9h4
private void fixUp(int k) { kV:FJx0xP
while (k > 1) { ;Ma/b=Y
int j = k >> 1; F'>GN}n
if (queue[j]>queue[k]) a j@C0
break; Q_]!an(
SortUtil.swap(queue,j,k); $dZ>bXUw:
k = j; xngeV_xc2
} N{V5 D
} bg1"v a#2
1;Wkt9]9
} Fi?Q 4b
N?=qEX|R
} C*EhexK,}
2 ]DCF
SortUtil： 7Z`Mt9:Ht
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package org.rut.util.algorithm; eC^0I78x
<5ft6a2fQ
import org.rut.util.algorithm.support.BubbleSort; %eJ\d?nw
import org.rut.util.algorithm.support.HeapSort; tFvgvx\:
import org.rut.util.algorithm.support.ImprovedMergeSort; }}``~
import org.rut.util.algorithm.support.ImprovedQuickSort; I`"-$99|t1
import org.rut.util.algorithm.support.InsertSort; "ji$@b_\?
import org.rut.util.algorithm.support.MergeSort; /nY).lSH
import org.rut.util.algorithm.support.QuickSort; fzRyG-cEpj
import org.rut.util.algorithm.support.SelectionSort; 8yE%X!E
import org.rut.util.algorithm.support.ShellSort; iFnOl*TC
YV1a3
/** gY>;|),
* @author treeroot 4C,kA+P
* @since 2006-2-2 QxL@'n#5
* @version 1.0 J)$&z*!
*/ zJfK4o
public class SortUtil { ovQS ET18b
public final static int INSERT = 1; LZUA+x(
public final static int BUBBLE = 2; N /sEec
public final static int SELECTION = 3; O>SuZ>g+7
public final static int SHELL = 4; i?a,^UM5n[
public final static int QUICK = 5; $^vp'^uW>
public final static int IMPROVED_QUICK = 6; `i t+D
public final static int MERGE = 7; Z:UgozdC
public final static int IMPROVED_MERGE = 8; 5?3Isw`v2
public final static int HEAP = 9; @)OnIQN~
?#BZ `H
public static void sort(int[] data) { JNxW6 cK
sort(data, IMPROVED_QUICK); y$j1?7
} QIij>!c4
private static String[] name={ <TLGfA1bC
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 42Aje
}; TV1e bH7q
6K4`;
private static Sort[] impl=new Sort[]{ ?jNF6z*M6
new InsertSort(), w69>tC
new BubbleSort(), fuNl4BU
new SelectionSort(), P[rAJJN/E
new ShellSort(), -GDV[Bg
new QuickSort(), rV8(ia
new ImprovedQuickSort(), |'U,/
new MergeSort(), 00`bL
new ImprovedMergeSort(), kZU"Xn
new HeapSort() rPiiC/T.`
}; YW8K $W
'?{0z!!
public static String toString(int algorithm){ /,1SE(
return name[algorithm-1]; LKR==;qn
} \#\`!L[1
F* 3G_V
public static void sort(int[] data, int algorithm) { x1 ;rb8
impl[algorithm-1].sort(data); &5kZ{,-eM
} gB/;clCdX)
&7L~PZ
public static interface Sort { /e.FY9
public void sort(int[] data); ur/Oc24i1n
} U;';"9C2>
jo,6Aog|u
public static void swap(int[] data, int i, int j) { \3t,|%v
int temp = data; :kWZSN8.D
data = data[j]; =w',-+@
data[j] = temp; WdTbt
} 4r_!>['`"
} U9<_6Bsd