[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; sZ&|omN
} S8/~'<out
int i1=l; JP6 Noia
int i2=mid+1; A~a 3bCX+"
for(int cur=l;cur<=r;cur++){ mKO~`Wq%@
if(i1==mid+1) [5p9p1@u{C
data[cur]=temp[i2++]; j0{`7n
else if(i2>r) H2: Zda#
data[cur]=temp[i1++]; <af# C2`B
else if(temp[i1] data[cur]=temp[i1++]; ,v8e7T
else |w*s:p
data[cur]=temp[i2++]; Fd<Ouyxqe
} mL`8COA
} ,IboPh&Q78
|LQ%sV
} ]j/= x2p
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改进后的归并排序: :g63*d+/G
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package org.rut.util.algorithm.support; Lv%t*s2$/
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import org.rut.util.algorithm.SortUtil; 4uoZw3O
QH(&Cu,
/** ~s HdOMw
* @author treeroot b=MW;]F
* @since 2006-2-2 EDgtn)1
* @version 1.0 {*O+vtir%
*/ Bv@p9 ] n
public class ImprovedMergeSort implements SortUtil.Sort { <H60rON
+CBN[/Z^i
private static final int THRESHOLD = 10; d>)=|
ZXYyG`3+
/* T=42]h
* (non-Javadoc) SQf[1}$ .
* d6tLCQ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) i:jXh9+
*/ "*X\'LPs=
public void sort(int[] data) { g{}<ptx]
int[] temp=new int[data.length]; 8el6z2
mergeSort(data,temp,0,data.length-1); \HzmhQb+m
} o;Z"I&
">wvd*w0"(
private void mergeSort(int[] data, int[] temp, int l, int r) { ,S`n?.&& 7
int i, j, k; (!{*@?S
int mid = (l + r) / 2; U~ a\v8l~
if (l == r) @Drl5C}+
return; SQK82/
if ((mid - l) >= THRESHOLD) 8ly)G
mergeSort(data, temp, l, mid); K(upzn*a
else us|Hb
insertSort(data, l, mid - l + 1); 1DcBF@3sWG
if ((r - mid) > THRESHOLD) Q}B]b-c+E
mergeSort(data, temp, mid + 1, r); \a;xJzc9
else -avxH?;?7
insertSort(data, mid + 1, r - mid); >e6OlIW
]h`*w
for (i = l; i <= mid; i++) { 18F}3t??
temp = data; q9ra
} 5"57F88Y1
for (j = 1; j <= r - mid; j++) { VZcW 3/Y
temp[r - j + 1] = data[j + mid]; nsi?.c&0!
} ,iao56`E
int a = temp[l]; |-S!)iG1V
int b = temp[r]; [nVBnB
for (i = l, j = r, k = l; k <= r; k++) { sv%E5@
if (a < b) { 5<PNl~0
data[k] = temp[i++]; Sq,>^|v4&e
a = temp; #b428-
} else { 1ds4C:M+<
data[k] = temp[j--]; 4pT^*
b = temp[j]; MFa/%O_*
} zC)JOykI%
} oc,I,v
} l([aKm#
D )`(b
/** W3UxFs]$
* @param data T:{&eWH
* @param l =ZURh_{xV
* @param i ]}b
*/ tTTHQ7o*BD
private void insertSort(int[] data, int start, int len) { |X>'W"Mn
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); dYD;Z<l
} Ve"(}z
} #|je m
} $6UU58>n
} ; ,sNRES3
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堆排序： %(&ja_oO
8~Zw"
package org.rut.util.algorithm.support; J'ce?_\?PY
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import org.rut.util.algorithm.SortUtil; +i!HMyM
Gu$J;bXVj
/** e6_8f*o|s
* @author treeroot pEcYfj3M
* @since 2006-2-2 L%$-?O|
* @version 1.0 7:LEf"vRZ
*/ xP>cQELot
public class HeapSort implements SortUtil.Sort{ GNM>hQ)h:
w]qM
/* (non-Javadoc) KZg2`8F
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ua|iAD1
*/ :X}SuM?c
public void sort(int[] data) { S{l)hwlE
MaxHeap h=new MaxHeap(); Q.Nw#r+m
h.init(data); :atd_6
for(int i=0;i h.remove(); Iv3O8GU
System.arraycopy(h.queue,1,data,0,data.length); QpQ2hNf
} ~xY"P)(x;
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private static class MaxHeap{ &'k(v(>n,
B6&[_cht
void init(int[] data){ ~x9J&*zxM
this.queue=new int[data.length+1]; 1o\2\B=k{
for(int i=0;i queue[++size]=data; Heh&;c
fixUp(size); Jy}~ZY
} 6 L4\UTr
} <?IDCOt ?
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private int size=0; m_Ed[h/I
tik*[1it
private int[] queue; &D[M<7T
3YLfh`6
public int get() { hY{4_ie=8
return queue[1]; YC 4c-M
} FEu}zt@
?/MkH0[G=
public void remove() { d m"R0>
SortUtil.swap(queue,1,size--); NvIg,@}
fixDown(1); ,8Q0AkG
} QChWy`x
file://fixdown +~G:z|k
private void fixDown(int k) { f@ |[pT
int j; p<dw C"z
while ((j = k << 1) <= size) { S[9b I&C
if (j < size %26amp;%26amp; queue[j] j++; -eK0 +beQ
if (queue[k]>queue[j]) file://不用交换 w{T$3F`@9
break; "2C}Pr,p8
SortUtil.swap(queue,j,k); [g@qZ5I.
k = j; N e{=KdzT
} k0I$x:c
} S_Nm?;P
private void fixUp(int k) { SbX^DAlB1
while (k > 1) { 'q;MhnU+
int j = k >> 1; ZhCz]z~tj6
if (queue[j]>queue[k]) /cdLMm:
break; mIG>`7`7N
SortUtil.swap(queue,j,k); um$U3'0e
k = j; <Tgubv+J
} 1&e8vVN
} ]!S#[Wt {k
^pe/~ :a
} S"Vr+x?
~2hzyEh
} Q`J U[nY
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SortUtil： y=\&z&3$
KQ9w>!N[
package org.rut.util.algorithm; ,)\G<q yO6
Ag:/iB]
import org.rut.util.algorithm.support.BubbleSort; rusM]Z
import org.rut.util.algorithm.support.HeapSort; _Fj\0S"
import org.rut.util.algorithm.support.ImprovedMergeSort; n7ZJ< ~wl
import org.rut.util.algorithm.support.ImprovedQuickSort; %2D'NZS
import org.rut.util.algorithm.support.InsertSort; ts[8;<YD
import org.rut.util.algorithm.support.MergeSort; 7\$}|b[9
import org.rut.util.algorithm.support.QuickSort; ,ynN801\m
import org.rut.util.algorithm.support.SelectionSort; lgVT~v{U`n
import org.rut.util.algorithm.support.ShellSort; }Tm+gJA
+K'YVB U}
/** (L4C1h_]9
* @author treeroot 34)l3UI~
* @since 2006-2-2 })@xWU6!
* @version 1.0 7`L]aRS[
*/ 0hkYexX73
public class SortUtil { ) xV>Va8)
public final static int INSERT = 1; 9fbo
public final static int BUBBLE = 2; n@kJ1ee'
public final static int SELECTION = 3; h){#dU+&
public final static int SHELL = 4; @/As|)
public final static int QUICK = 5; D.7cWR`Wp
public final static int IMPROVED_QUICK = 6; B(71I;
public final static int MERGE = 7; |uFb(kL[U
public final static int IMPROVED_MERGE = 8; |I"&Z+m
public final static int HEAP = 9; J Z@sk2
Su,<idS
public static void sort(int[] data) { |,n(9Ix
sort(data, IMPROVED_QUICK); ^oDs*F
} 4$2HO`@uN
private static String[] name={ T^d<vH
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" K\ pZ
}; A9Ea}v9:
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private static Sort[] impl=new Sort[]{ 2XBHo (
new InsertSort(), BH}rg,]G
new BubbleSort(), G^<m0ew|
new SelectionSort(), 4s>L]! W$8
new ShellSort(), *}HDq(/>w
new QuickSort(), F@t\D?
new ImprovedQuickSort(), B[w.8e5
new MergeSort(), h }&dvd
new ImprovedMergeSort(), WQw11uMt@q
new HeapSort() r#ADxqkaV
}; qS}{O0
1$}Tn
public static String toString(int algorithm){ :&$v.#
return name[algorithm-1]; \mb@-kM)
} H_Hr=_8}-
}|=Fnyj
public static void sort(int[] data, int algorithm) { K43`$
impl[algorithm-1].sort(data); S9b=?? M)
} rwwyYIlEg
'R$/Qt;uA
public static interface Sort { 5A %TpJ
public void sort(int[] data); k+@ :+RL
} g:c?%J
9ygNJX'~
public static void swap(int[] data, int i, int j) { /NPx9cLW^
int temp = data; ZW;Re5?DJ
data = data[j]; M!VW/vdywL
data[j] = temp; <dS I"C<
} ij?]fXf:)y
} QRdtr