[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; L8Q!6oO=<
} Y`uCDfcQ
int i1=l; htaLOTO;A
int i2=mid+1; J;dFmZOk
for(int cur=l;cur<=r;cur++){ ;q2T*4NN
if(i1==mid+1) 6~LpBlb
data[cur]=temp[i2++]; Ok!{2$P8U9
else if(i2>r) ;U&VPIX$
data[cur]=temp[i1++]; rv:O|wZ
else if(temp[i1] data[cur]=temp[i1++]; "5K:"m
else |~Iw
data[cur]=temp[i2++]; AP%h!b5v
} da@ .J9
} QR4o j
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} 2_Z60]
9 pn1d.
改进后的归并排序: It[~0?+
FBsw\P5w
package org.rut.util.algorithm.support; `u-Y 5mY
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import org.rut.util.algorithm.SortUtil; 6%-2G@6d
,")7uMZaF\
/** MZ'HMYed
* @author treeroot C'ZU .Y
* @since 2006-2-2 {YFru6$
* @version 1.0 }- Sr@bE
*/ RiklwR#~r/
public class ImprovedMergeSort implements SortUtil.Sort { szHUHW~;J
<3KrhhH
private static final int THRESHOLD = 10; G`jhzG
mD!imq%=
/* vq}V0- <
* (non-Javadoc) 4)_ [)MZ\j
* OuoZd!"qf
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $)3/N&GXR
*/ aO1cd_d6x_
public void sort(int[] data) { ZfU_4Pl->
int[] temp=new int[data.length]; 43Q&<r$[T
mergeSort(data,temp,0,data.length-1); n !QjptQ
} N@}U;x}
)'JSu=Ej
private void mergeSort(int[] data, int[] temp, int l, int r) { 6x0>E^~
int i, j, k; hjE9[{K
int mid = (l + r) / 2; 1K>4i. X
if (l == r) Rjf|
return; ?k#%AM
if ((mid - l) >= THRESHOLD) 8Bhng;jX
mergeSort(data, temp, l, mid); u8*0r{kOH
else mN{$z<r
insertSort(data, l, mid - l + 1); dn Xc- <
if ((r - mid) > THRESHOLD) +]#>6/2q
mergeSort(data, temp, mid + 1, r); V47Fp
else @azS)4L
insertSort(data, mid + 1, r - mid); WKG=d]5
-}%zus5
for (i = l; i <= mid; i++) { Po5}Vh
temp = data; j[9B,C4
} wP%;9y2B
for (j = 1; j <= r - mid; j++) { ;$Y?j8g
temp[r - j + 1] = data[j + mid]; 04s N4C
} f5N~K>
int a = temp[l]; f: Rh9
int b = temp[r]; *M{1RMc
for (i = l, j = r, k = l; k <= r; k++) { 2}NfR8 N
if (a < b) { M`(xAVl
data[k] = temp[i++]; sEoS[t|"
a = temp; -Jhf]
} else { *)`:Nm~y
data[k] = temp[j--]; qcK)J/K"
b = temp[j]; ^/c|s!U^
} 0t) IWD
} fqcyCu7Ep
} hm&~6rB
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/** /<mc~S7
* @param data \sk,3b-&'
* @param l [-l^,,E
* @param i Uc4r
*/ J(Bn n
private void insertSort(int[] data, int start, int len) { '&"7(8E} *
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); V#=N?p
} \ .:CL?m#
} 4ngiad6bR
} Ct B> s7
} g$A1*<+
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堆排序： RKe19l_V
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package org.rut.util.algorithm.support; b`^$2RM&
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import org.rut.util.algorithm.SortUtil; )T>a|.
3}"VUS0wh
/** @-hy:th#
* @author treeroot h.67]U7m
* @since 2006-2-2 4EOu)#
* @version 1.0 k2xjcrg
*/ 69_c,(M0
public class HeapSort implements SortUtil.Sort{ `q F:rQ
lU\|F5O@#
/* (non-Javadoc) qB8<(vBP+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %hXa5}JL
*/ a(m#GES
public void sort(int[] data) { j#-74{Y$ J
MaxHeap h=new MaxHeap(); 7|{QAv
h.init(data); NWKD:{
for(int i=0;i h.remove(); 1r;Q5[@
System.arraycopy(h.queue,1,data,0,data.length); 46mu,v
} "dA"N$
&oT]ycz%
private static class MaxHeap{ tvd/Y|bV=
)&*&ZL0
void init(int[] data){ Jap v<lV%
this.queue=new int[data.length+1]; 0hPm,H*Y]
for(int i=0;i queue[++size]=data; .9`.\v6R
fixUp(size); 0py0zE6,,
} il:+O08_
} _3)~{dQ+
d@C93VYp
private int size=0; U7{, *
>:Rc%ILym
private int[] queue; b+w|3bQa
5Eq_L
public int get() { \wTWhr0
return queue[1]; HSTtDTo
} hGPjH=^EM
oqG 0 @@
public void remove() { ll6~8PN
SortUtil.swap(queue,1,size--); : G<1
fixDown(1); OYe @P
} .rwZ`MP
file://fixdown dD#A.C,Rz
private void fixDown(int k) { S]k<Ixvf
int j; ETYw
while ((j = k << 1) <= size) { O%rjY
if (j < size %26amp;%26amp; queue[j] j++; htIV`_<Ro
if (queue[k]>queue[j]) file://不用交换 XWK A0
break; 1,Y-_e)
SortUtil.swap(queue,j,k); n`}vcVL;
k = j; kGCd!$fsk
} hMi`n6m
} ^ng?+X>mP
private void fixUp(int k) { Zsaz#z|xW
while (k > 1) { g&v2=&aj
int j = k >> 1; Zpg$:Rr
if (queue[j]>queue[k]) 75gE>:f
break; Dk/;`sXV
SortUtil.swap(queue,j,k); 7v#sr<
k = j; BsRxD9r
} 'r3I/qg*m
} zxXm9zrLo
) _"`{2
} \ VJ3
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} GBN^ *I
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SortUtil： c}lUP(Ss
TN(1oJ:
package org.rut.util.algorithm; W,}C*8{+
wQDKv'zU1
import org.rut.util.algorithm.support.BubbleSort; 1)H+iN|im/
import org.rut.util.algorithm.support.HeapSort; {i3]3V"Xp
import org.rut.util.algorithm.support.ImprovedMergeSort; `5Q0U%`W
import org.rut.util.algorithm.support.ImprovedQuickSort; {Dqf.w>t
import org.rut.util.algorithm.support.InsertSort; N_Yop
import org.rut.util.algorithm.support.MergeSort; sFMSH:5z
import org.rut.util.algorithm.support.QuickSort; }~yhkt5K
import org.rut.util.algorithm.support.SelectionSort; _z~|*7@
import org.rut.util.algorithm.support.ShellSort; A@+pvC&
.XTBy/(0
/** ?~hC.5
* @author treeroot JuS#p5E #
* @since 2006-2-2 <t&0[l
* @version 1.0 )y_MI r
*/ zJOL\J'
public class SortUtil { f8!*4Bw
public final static int INSERT = 1; b<NI6z8\
public final static int BUBBLE = 2; 3`$-
public final static int SELECTION = 3; Fep#Pw1
public final static int SHELL = 4; +,f|Y6L<
public final static int QUICK = 5; ]^p6dbzWe
public final static int IMPROVED_QUICK = 6; &+Xj%x.]
public final static int MERGE = 7; _|`S9Nms
public final static int IMPROVED_MERGE = 8; ,)|nxX
public final static int HEAP = 9; {IJ,y27
rOEk%kJ
public static void sort(int[] data) { 8 YsDE_
sort(data, IMPROVED_QUICK); wHvX|GwMv
} V`m'r+ Y
private static String[] name={ *{/BPc0*
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" txw:m*(%
}; 4DaLmQ2O
9])dLL0
private static Sort[] impl=new Sort[]{ V)=!pT
new InsertSort(), *xI0hFJIM
new BubbleSort(), GMyzQ]@}
new SelectionSort(), e3}`]
new ShellSort(), V*"-@
new QuickSort(), :'|%~&J
new ImprovedQuickSort(), F$F,I,$ "
new MergeSort(), ?I6!m~
new ImprovedMergeSort(), \ym3YwP4/:
new HeapSort() 4f:B2x{
}; jTH,GF
v=R=K
public static String toString(int algorithm){ V)mitRaV
return name[algorithm-1]; Vf:/Kokq
} 1Ue)&RW
xy5&}_Y
public static void sort(int[] data, int algorithm) { DY/xBwIF
impl[algorithm-1].sort(data); 9@/X;zO
} 6w|s1!Bl
>|'u:`A
public static interface Sort { W_8N?coM
public void sort(int[] data); yY_Zq\
} Nr8#/H2f
s]@()?.E$
public static void swap(int[] data, int i, int j) { \R\?`8Orz
int temp = data; V{+'(<SV
data = data[j]; ;89 `!V O
data[j] = temp; uxLT*,
} |WwC@3)
} WdI9))J2S