[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; vd5"phn 3
} kRk=8^."By
int i1=l; zn4Yo
int i2=mid+1; t?-7Z6
for(int cur=l;cur<=r;cur++){ j=^b'dyL
if(i1==mid+1) J6!t"eB+
data[cur]=temp[i2++]; ;,z^!bD
else if(i2>r) g>[|/z P
data[cur]=temp[i1++]; W biUz2)
else if(temp[i1] data[cur]=temp[i1++]; UeRx ^
else Xcq9*!%o
data[cur]=temp[i2++]; -9S.G
} )-3!-1
} 1m/=MET]
by {G{M`X
} ,{C(<1
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改进后的归并排序: /WDz;,X
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package org.rut.util.algorithm.support; Y[Gw<1F_
RRD\V3C84
import org.rut.util.algorithm.SortUtil; ^"w.v' sL
;z9(
/** NVnKgGlHgd
* @author treeroot /HNZwbh]uJ
* @since 2006-2-2 "9[K
* @version 1.0 >4d2IO1\
*/ MwxfTH"wi
public class ImprovedMergeSort implements SortUtil.Sort { z]k=sk
Ne]/ sQ0
private static final int THRESHOLD = 10; ;y#6Nx,:
6TE RQ
/* yG0Wr=/<?
* (non-Javadoc) mI=^7'Mk
* b'$j* N
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;8~`fK
*/ XR^VRn6O
public void sort(int[] data) { A a2*f[
int[] temp=new int[data.length]; r +] J {k
mergeSort(data,temp,0,data.length-1); @o+T<}kWX
} SnbH`\U"
dXh@E7
private void mergeSort(int[] data, int[] temp, int l, int r) { 1Tn!.E *
int i, j, k; E<3hy
int mid = (l + r) / 2; 3zb;q@JV
if (l == r) y+RT[*bX5o
return; VI%879Z\e
if ((mid - l) >= THRESHOLD) /Q"nQSG
mergeSort(data, temp, l, mid); M* W=v
else p[e|N;W8A
insertSort(data, l, mid - l + 1); +w/Ax[K
if ((r - mid) > THRESHOLD) 'f`~"@
mergeSort(data, temp, mid + 1, r); -[#Mx}%
else L%a ni}V
insertSort(data, mid + 1, r - mid); tg~&kaz
66=6;77
for (i = l; i <= mid; i++) { ( $3j
temp = data; 'uUp1+
} v@k62@;
for (j = 1; j <= r - mid; j++) { ~?vm97l
temp[r - j + 1] = data[j + mid]; :~^ec|tp
} qy@gW@IU
int a = temp[l]; DR9M8E
int b = temp[r]; 1!\!3xaV
for (i = l, j = r, k = l; k <= r; k++) { )J_!ZpMC
if (a < b) { rsfA.o
data[k] = temp[i++]; K0]'v>AWr
a = temp; w\;=3C`
} else { ?ZSG4La\
data[k] = temp[j--]; &a8#qv"l
b = temp[j]; I TJ>[c]x
} `sN3iD!@R
} ew4IAF
} @hm%0L
TE*$NxQ 2
/** 0+8ThZ?n
* @param data %_1~z[Dv
* @param l /-$`GT?l
* @param i Fm-W@
*/ 3h"; 2
private void insertSort(int[] data, int start, int len) { 1X2oz
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); C[rYVa .
} Y[T;j p(k
} Ii*v(`2b
} )?pin|_x
} hzPx8sO
5vYh~|
堆排序： %>i7A?L
mo#4jtCE
package org.rut.util.algorithm.support; e=Kv[R'(M
c6s(f
import org.rut.util.algorithm.SortUtil; c0<Y017sG
`Dh%c%j)
/** N>Y`>5
* @author treeroot GU'5`Yzd9
* @since 2006-2-2 f\~e&`PV
* @version 1.0 v5wI?HE
*/ l4F4o6:]n
public class HeapSort implements SortUtil.Sort{ =Gd[Qn83.%
*8/Q_w
/* (non-Javadoc) 2{p`"xX
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) p/lMv\`5
*/ jXi<ZJ
public void sort(int[] data) { ynM{hN.+H
MaxHeap h=new MaxHeap(); o^&; `XOd
h.init(data); N,'JQch},8
for(int i=0;i h.remove(); (L|SE4
System.arraycopy(h.queue,1,data,0,data.length); [X^JV/R
} h%+8}uywZ
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private static class MaxHeap{ <$Uj ~jN
:`3b|u=KZ
void init(int[] data){ }jiqUBn%
this.queue=new int[data.length+1]; ADv a@P
for(int i=0;i queue[++size]=data; 6{azzk8
fixUp(size); 7@EYF
} Yc?taL)
} ,l; &Tb=k
(GPJ=r
private int size=0; %/etoK
|,dMF2ADc
private int[] queue; tt J,rM
bHS2;K~
public int get() { K!I]/0L
return queue[1]; `yYgL@Zt
} Oku4EJFJ
m3_e]v3{o
public void remove() { P603P
SortUtil.swap(queue,1,size--); >+vWtO2
fixDown(1); :1Fm~'
} B"KsYB79t
file://fixdown *$#r%
private void fixDown(int k) { 9d[0i#`:q
int j; kP;:s
while ((j = k << 1) <= size) { (= !_5l
if (j < size %26amp;%26amp; queue[j] j++; XZ|"7as
if (queue[k]>queue[j]) file://不用交换 n#J$=@
break; crgYr$@s?
SortUtil.swap(queue,j,k); [b#jw,7
k = j; b1[U9
} 5)$U<^uy
} 'R]Z9h
private void fixUp(int k) { M5ZWcD.1
while (k > 1) { q`$QroZT"
int j = k >> 1; xo@N~
if (queue[j]>queue[k]) %m+MEh"b5
break; m\Tq0cT$
SortUtil.swap(queue,j,k); $d8A_CUU
k = j; n;Iey[7_E`
} ['s_qCA[
} mH{cGu?
3Vw%[+lY9
} Plq[Ml9
y'@l,MN{
} *?K`T^LS
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SortUtil： bLV@Ts
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package org.rut.util.algorithm; t&P5Zw*B
_)_XO92~
import org.rut.util.algorithm.support.BubbleSort; l?FNYvL
import org.rut.util.algorithm.support.HeapSort; C>K/C!5?
import org.rut.util.algorithm.support.ImprovedMergeSort; _ZS<zQ'
import org.rut.util.algorithm.support.ImprovedQuickSort; X!2|_
import org.rut.util.algorithm.support.InsertSort; dhVwS$O )
import org.rut.util.algorithm.support.MergeSort; <}mT[;:"
import org.rut.util.algorithm.support.QuickSort; @tj0Ir v
import org.rut.util.algorithm.support.SelectionSort; +] 5a(/m.~
import org.rut.util.algorithm.support.ShellSort; _r8AO>
Y}?@Pm drz
/** E,6E-9
* @author treeroot rk. UW
* @since 2006-2-2 \FKIEg+(2
* @version 1.0 6op\g].P
*/ XdS<51 C
public class SortUtil { $1dI
public final static int INSERT = 1; |Q I3H]T7
public final static int BUBBLE = 2; +;!w;t
public final static int SELECTION = 3; WX=+\`NyJ(
public final static int SHELL = 4; /uyQ>Y*-\Y
public final static int QUICK = 5; 4Dd9cG,lN
public final static int IMPROVED_QUICK = 6; RsOK5XnQn
public final static int MERGE = 7; l:|Fs=\
public final static int IMPROVED_MERGE = 8; H~~(v52wD
public final static int HEAP = 9; yv:NH|,/y
@<6-uk3S
public static void sort(int[] data) { X_YD[
sort(data, IMPROVED_QUICK); V3+%KkN
} \)#3S $L~
private static String[] name={ &qpA<F@7
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 3+$O#>
}; 8/F2V?iT
R|M:6]}
private static Sort[] impl=new Sort[]{ nWl0R=
new InsertSort(), $U0(%lIU
new BubbleSort(), MnS"M[y3
new SelectionSort(), (,TO|
new ShellSort(), f7W=x6Z4
new QuickSort(), 3PEs$m9e
new ImprovedQuickSort(), }GC{~ SZ4
new MergeSort(), aLq;a
new ImprovedMergeSort(), 0=5i\*5 p
new HeapSort() B~ez>/H^
}; gU%GM
2?ednMoE
public static String toString(int algorithm){ >lj3MNSH
return name[algorithm-1]; v6n(<0:
} T*ic?!
c"$_V[m
public static void sort(int[] data, int algorithm) { -)Vj08aP
impl[algorithm-1].sort(data); [<`+9R
} A^Zs?<C-
&p%ctg
public static interface Sort { K@,VR3y /
public void sort(int[] data); WE"'3u^k
} .=FJ5?:4i%
#Nd+X@j
public static void swap(int[] data, int i, int j) { 2X]\:<[4
int temp = data; B>mQ\Q
data = data[j]; !INr
data[j] = temp; pqr"x2=.
} 5a~1RL
} I|5OCTu