[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; #>I*c_-
} ~Ibq,9i
int i1=l; Mqy5>f)
int i2=mid+1; |sQC:y>
for(int cur=l;cur<=r;cur++){ \S]"nHX
if(i1==mid+1) $:{r#mM
data[cur]=temp[i2++]; 0nz=whS{
else if(i2>r) U"Gg ,
data[cur]=temp[i1++]; =qQH,{]c6
else if(temp[i1] data[cur]=temp[i1++]; ?CaMn b8
else Dd1\$RBo
data[cur]=temp[i2++]; i|- 6
} 'N-nFc^
} i)vbmV
Td7f
} ;7Hse^Oc
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改进后的归并排序: @O&<_&
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package org.rut.util.algorithm.support; )<]*!
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import org.rut.util.algorithm.SortUtil; JG]67v{F
Ts+S>$
/** m7GM1[?r
* @author treeroot xq U@87[_
* @since 2006-2-2 A Th<=1
* @version 1.0 z.NJu q
*/ D)XV{Wit
public class ImprovedMergeSort implements SortUtil.Sort { 73:y&U
)oEHE7y
private static final int THRESHOLD = 10; #:^aE|s
4Nz@s^9
/* -?m"+mUP
* (non-Javadoc) hJkP_(+J\
* SN${cs%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {8!\aYI
*/ R2]2#3`
public void sort(int[] data) { jH4,-
int[] temp=new int[data.length]; Hr?_`:
mergeSort(data,temp,0,data.length-1); /< OoZf+[
} aP#nK
mz|#K7:
private void mergeSort(int[] data, int[] temp, int l, int r) { M_<? <>|
int i, j, k; T#HW{3
int mid = (l + r) / 2; gpIq4Q<
if (l == r) .u+ZrA#
return; :A~6Gk92A
if ((mid - l) >= THRESHOLD) +prr~vgE
mergeSort(data, temp, l, mid); 3RwDIk?>%
else rA=iBb3`
insertSort(data, l, mid - l + 1); nUp, %z[
if ((r - mid) > THRESHOLD) ~\UH`_83[
mergeSort(data, temp, mid + 1, r); RDX$Wy$@L
else E%B:6
insertSort(data, mid + 1, r - mid); ;x]CaG)f
K\bA[5+N
for (i = l; i <= mid; i++) { ,Pq@{i#
temp = data; 6~:eO(pK l
} nfL-E:n=
for (j = 1; j <= r - mid; j++) { *OX;ZQg0
temp[r - j + 1] = data[j + mid]; "@P)
} m1d*Lt>F@
int a = temp[l]; J)*7JX
int b = temp[r]; E41ay:duAl
for (i = l, j = r, k = l; k <= r; k++) { )~u<u:N
if (a < b) { RotWMGNK
data[k] = temp[i++]; W%6Y?pf)z
a = temp; nIckI!U#D
} else { %%7~<=rk
data[k] = temp[j--]; EFZ]|Z7
b = temp[j]; L0sb[:'luz
} ,aA%,C.0U
} <k41j=d
} (IE\}QcK
*$+:Cbe-F
/** ><l|&&e-
* @param data ;J]Lzh
* @param l sQIzcnKB
* @param i Vo G`@^s
*/ 8p91ni'
private void insertSort(int[] data, int start, int len) { bL6, fUS
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); <Qx]"ZP%
} Hzn6H4Rc
} R6xJw2;_
} !4?QR
} y3^>a5z!x
acPX2B[jJ
堆排序： v`G[6Z
r+yl{
package org.rut.util.algorithm.support; wjRv=[
E1"H(m&6
import org.rut.util.algorithm.SortUtil; Xb/W[rcs
q'% cVM
/** = Ff2
* @author treeroot $G,#nh2 oD
* @since 2006-2-2 Ub"6OT1tl
* @version 1.0 UP+4xG
*/ 4^OPzg6Z%p
public class HeapSort implements SortUtil.Sort{ bvR0?xnq
/x2MW5H
/* (non-Javadoc) xDsB%~
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) A;ti$jy
*/ o 9?#;B$
public void sort(int[] data) { f@)GiLC'"
MaxHeap h=new MaxHeap(); 3|Vh[iAa\
h.init(data); v\#1&</qd^
for(int i=0;i h.remove(); gO9\pI2
System.arraycopy(h.queue,1,data,0,data.length); K:<0!C!
} :m{;<LRV
Bh%Yu*.f
private static class MaxHeap{ D.ajO^[
?gGmJl
void init(int[] data){ HW"';M%
this.queue=new int[data.length+1]; >3,t`Z:
for(int i=0;i queue[++size]=data; 9 M<3m
fixUp(size); B]_NI=d
} ZD`9Ez)5
} 9_/dj"5
Vs:x3)m5j
private int size=0; mRYM,
F?3zw4Vt~
private int[] queue; HOPi2nf{
@`D`u16]i
public int get() { 7hq$vI%0
return queue[1]; NH$!<ffz
} 5@3hb]J
ej^pFo
public void remove() { k2@|fe
SortUtil.swap(queue,1,size--); v;_k*y[VV$
fixDown(1); >'MT]@vez
} 0CtPq`!
file://fixdown \-2O&v'}
private void fixDown(int k) { ]?/7iM
int j; \c .^^8r
while ((j = k << 1) <= size) { 'v42QJ"{
if (j < size %26amp;%26amp; queue[j] j++; tl@n}
if (queue[k]>queue[j]) file://不用交换 j56Dt_
break; `yXJaTbo
SortUtil.swap(queue,j,k); J;mvD^`g
k = j; j_#oP
} q'zV9
} /bBFPrW
private void fixUp(int k) { tAxS1<T4
while (k > 1) { TM?RH{(r
int j = k >> 1; { d*?O
if (queue[j]>queue[k]) sDF5
break; ' Akt5q
SortUtil.swap(queue,j,k); M<KWx'uV
k = j; aplOo[
} :TTZ@ q
} ^~65M/
S(Ej: H
} ,!{/Y7PmJ
+Vsd%AnN"l
} k>aWI
o$[alh;c+W
SortUtil： 5Y}=,v*h}
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package org.rut.util.algorithm; 5jS8{d0
YYzl"<)c
import org.rut.util.algorithm.support.BubbleSort; zo{WmV7[|
import org.rut.util.algorithm.support.HeapSort; z}sBx9;
import org.rut.util.algorithm.support.ImprovedMergeSort; 8`4Z%;1
import org.rut.util.algorithm.support.ImprovedQuickSort; hOTqbd}
import org.rut.util.algorithm.support.InsertSort; Y7L1`<SC
import org.rut.util.algorithm.support.MergeSort; *(pmFEc
import org.rut.util.algorithm.support.QuickSort; X61p xPa
import org.rut.util.algorithm.support.SelectionSort; 017(I:V?(:
import org.rut.util.algorithm.support.ShellSort; =w#sCy
_1sjsGp>
/** B+w< 0No
* @author treeroot b+DBz}L4
* @since 2006-2-2 )c"m:3D@
* @version 1.0 _R] qoUw;
*/ qyl9#C(a
public class SortUtil { _w\A=6=q|
public final static int INSERT = 1; a{deN9Qn
public final static int BUBBLE = 2; =4H"&Eu{
public final static int SELECTION = 3; Kz`g Q|S
public final static int SHELL = 4; { :~&#D
public final static int QUICK = 5; pZA0Go2!IN
public final static int IMPROVED_QUICK = 6; =u,8(:R]s
public final static int MERGE = 7; h+<F,0
public final static int IMPROVED_MERGE = 8; {:!CA/0Jx
public final static int HEAP = 9; Eqc,/
wFHbz9|@I
public static void sort(int[] data) { rcx'`CIJ
sort(data, IMPROVED_QUICK); Ki_8g
} cf7UV6D g
private static String[] name={ ',g'Tl^E
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" <8_~60
}; pk&;5|cCD
i[\`]C{gf
private static Sort[] impl=new Sort[]{ DGY?4r7>y
new InsertSort(), G$HXc$OY
new BubbleSort(), Y8$,So>~
new SelectionSort(), JXa5snh{h
new ShellSort(), LaolAqU
new QuickSort(), 61"w>;d6
new ImprovedQuickSort(), #;WKuRv
new MergeSort(), x6BO%1
new ImprovedMergeSort(), o[ua$+67E
new HeapSort() kbHfdA
}; f(r=S Xa*
oTjsiXS
public static String toString(int algorithm){ -%g&O-i\
return name[algorithm-1]; ivb?B,Lz0
} K>a+-QWK3
s;[OR
public static void sort(int[] data, int algorithm) { ),u)#`.l G
impl[algorithm-1].sort(data); ]@rt/ eX
} },W<1*|
<RFT W}f!
public static interface Sort { Dno'-{-
public void sort(int[] data); `uN}mC!r]
} #@cOyxUt
HL*Fs /W
public static void swap(int[] data, int i, int j) { $afE= qC*
int temp = data; E/6@>.T?'
data = data[j]; HT: p'Yyi
data[j] = temp; *sPG,6>
} j0F'I*Z3
} 'q:t48&