[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; >RE&>T^8
} <k}>eGn
int i1=l; D OPOzh
int i2=mid+1; kw|bEL9!u
for(int cur=l;cur<=r;cur++){ <hQ@]2w$
if(i1==mid+1) \L6U}ZQ2V
data[cur]=temp[i2++]; `;5UlkVZ5
else if(i2>r) L=4?vs
data[cur]=temp[i1++]; !tHqF
else if(temp[i1] data[cur]=temp[i1++]; 18V*Cu
else t3v*P6
data[cur]=temp[i2++]; pg*'2AT
} 0>VgO{X
} HC}D<FX|
EmG`ga)s
} ~>xn9vb=
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改进后的归并排序: C6CX{IA]
@QVAsNW:O
package org.rut.util.algorithm.support; IS]03_uQ
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import org.rut.util.algorithm.SortUtil; {HvR24#
Af ^6
/** bo\|mvB~
* @author treeroot W&BwBp]K
* @since 2006-2-2 6i%LM`8GEk
* @version 1.0 M1Od%nz3
*/ )Qb1$%r.
public class ImprovedMergeSort implements SortUtil.Sort { H*EQ%BLW^,
DTn=WGm)
private static final int THRESHOLD = 10; Y5cUOfYT
4 lJ@qhV
/* Nr3td`;
* (non-Javadoc) %v :a
* T?^AllUZQR
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) o(C({]UO/
*/ z=BX-)
public void sort(int[] data) { /2Y Nu*v
int[] temp=new int[data.length]; 1S0Hc5vw
mergeSort(data,temp,0,data.length-1); J0mY=vX
} I?s)^'
qPH]DabpI
private void mergeSort(int[] data, int[] temp, int l, int r) { p0`Wci
int i, j, k; peR=J7
int mid = (l + r) / 2; .Eh~$wm
if (l == r) 1Qhx$If~
return; zUIh8cAoE
if ((mid - l) >= THRESHOLD) ZUAWSJ,s
mergeSort(data, temp, l, mid); sB-c'`,w`
else 0ydAdgD
insertSort(data, l, mid - l + 1); eey <:n/Z
if ((r - mid) > THRESHOLD) yTkYPx
mergeSort(data, temp, mid + 1, r); +7N6]pK|"
else ZCbxL.fFz
insertSort(data, mid + 1, r - mid); m$pXe<
NVeb,Pf
for (i = l; i <= mid; i++) { i+Ob1B@w
temp = data; 3,3{wGvHHW
} /=,^fCCN
for (j = 1; j <= r - mid; j++) { &Vvy`JE
temp[r - j + 1] = data[j + mid]; m5{Y
} Nz*qz"T
int a = temp[l]; ;wJLH\/
int b = temp[r]; ;7tOFsV
for (i = l, j = r, k = l; k <= r; k++) { Rj+}L ~"
if (a < b) { ,'={/)c<
data[k] = temp[i++]; ~;wSe[
a = temp; 1K09iB
} else { 8T$:^HW
data[k] = temp[j--]; gC<\1AIu
b = temp[j]; C[n,j#Mvje
} 6(DK\58
} <)?H98S
} 7{8!IcR #
eem.lVVD
/** @bfaAh~
* @param data tvf"w`H
* @param l x #BUIi
* @param i N!9DZEcm
*/ ^dYFFKQ
private void insertSort(int[] data, int start, int len) { ZJ=-cE2n
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); |K aXek
} 2Z7smDJ
} JNuo+Pq
} f ,K1a9.
} 7&'^H8V
@hQ+pG@s
堆排序： q+WOnTS
tojJQ6;J
package org.rut.util.algorithm.support; Z9~~vf#
E I)Pfx"0
import org.rut.util.algorithm.SortUtil; 3`SLMPI
*~prI1e(
/** o PR^Z pt
* @author treeroot f.V0uBDN
* @since 2006-2-2 qaG%PH}a
* @version 1.0 P,_GTs3/G
*/ *)L%pH>`
public class HeapSort implements SortUtil.Sort{ D'|#5>G
cV&(L]k>`
/* (non-Javadoc) qI:}3b;T
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) w_/q5]/V-5
*/ FL(gwfL
public void sort(int[] data) { isQ{Xt~K
MaxHeap h=new MaxHeap(); F!c%&Z
h.init(data); x>&1;g2r
for(int i=0;i h.remove(); TnPdpynP
System.arraycopy(h.queue,1,data,0,data.length); HPVT$EJ
} .7+_ubj&,
wV W+~DJ
private static class MaxHeap{ 7:mM`0g!
ib/&8)Y+J
void init(int[] data){ 5p U(A6RtS
this.queue=new int[data.length+1]; O0WzDD
for(int i=0;i queue[++size]=data; &nZ=w#_
fixUp(size); F3,hx
} {LR?#.
} L a0H
NZi5rXN
private int size=0; - FA#hUK$
sJt&`kZ
private int[] queue; |Wi$@sWO
S%mN6b~{
public int get() { +]`MdOu
return queue[1]; ? Yy[8_(tN
} 7EQ |p
(+CB)nV0IA
public void remove() { %mtW-drv>
SortUtil.swap(queue,1,size--); )nQpO"+M
fixDown(1); @6h=O`X>
} "%qGcC8
file://fixdown A}H)ojG'v
private void fixDown(int k) { *2=:(OK
int j; vRRi"bo
while ((j = k << 1) <= size) { 8'Z9Z*^h#x
if (j < size %26amp;%26amp; queue[j] j++; i?4vdL8M
if (queue[k]>queue[j]) file://不用交换 c.KpXY
break; VSmshld
SortUtil.swap(queue,j,k); d[-w&[iy
k = j; 1wE~dpnx
} :Oa|&.0l?
} 'u_'y
private void fixUp(int k) { fCO!M1t
while (k > 1) { Ks8S^77
int j = k >> 1; JS!rZi
if (queue[j]>queue[k]) oKA8)~Xqou
break; o LuGW5wzj
SortUtil.swap(queue,j,k); *1Nz VV
k = j; .OXvv _?<
} HWVWl~FA
} n8iejdA'
A5y?|q>5
} cXE42MM
J--9VlC'
} c5R58#XK=
=WFMqBh<`
SortUtil： ,K3)f.ArYc
[KVBT;q6
package org.rut.util.algorithm; i7cMe8
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import org.rut.util.algorithm.support.BubbleSort; .OX.z~":y
import org.rut.util.algorithm.support.HeapSort; =NH:/j^
import org.rut.util.algorithm.support.ImprovedMergeSort; >[O @u4
import org.rut.util.algorithm.support.ImprovedQuickSort; sW3-JA]
import org.rut.util.algorithm.support.InsertSort; +\\,FO_
import org.rut.util.algorithm.support.MergeSort; S=eY`,'#R
import org.rut.util.algorithm.support.QuickSort; ~Q>97%
import org.rut.util.algorithm.support.SelectionSort; N/qr}- 3z
import org.rut.util.algorithm.support.ShellSort; !yG{`#NZZ
)z2Tm4>iql
/** \96?OCdr
* @author treeroot \iSaxwU_
* @since 2006-2-2 ]\sBl
* @version 1.0 h&NcN-["
*/ wrac\.
public class SortUtil { psgXJe$
public final static int INSERT = 1; 6@ToPbj4
public final static int BUBBLE = 2; 1i$9x$4~E
public final static int SELECTION = 3; na(@`(j[
public final static int SHELL = 4; bn~=d@'
public final static int QUICK = 5; 6_^u}me
public final static int IMPROVED_QUICK = 6; X<#Q~"
public final static int MERGE = 7; z<sf}6q
public final static int IMPROVED_MERGE = 8; 2Z\6xb|u
public final static int HEAP = 9; aOyAP-m,
-81usu&NH
public static void sort(int[] data) { O292JA
sort(data, IMPROVED_QUICK); V78QV3
} ~bdADVH
private static String[] name={ \m*?5]m;
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" P7 H-Dw
}; ]y2(ZTNTs
R1 hb-
private static Sort[] impl=new Sort[]{ 7t0\}e
new InsertSort(), HZkC3$
new BubbleSort(), t /EB y"N#
new SelectionSort(), %kKe"$)0
new ShellSort(), FC.y%P,
new QuickSort(), l`[*b_ Xt
new ImprovedQuickSort(), Hh$x8ADf
new MergeSort(), g$EjIHb
new ImprovedMergeSort(), 5ok3q@1_]{
new HeapSort() CsQ}eW8uEf
}; UF|v=|*{#
Jc-0.^]E}
public static String toString(int algorithm){ r2M._}bF
return name[algorithm-1]; h<$Vry}
} Ae<v
IgG@v9'
public static void sort(int[] data, int algorithm) { n/=&?#m}d
impl[algorithm-1].sort(data); (SkI9[1\@3
} *G.6\
e7{3:y|]d3
public static interface Sort { *jCXH<?R
public void sort(int[] data); (TVzYm y
} D?)"Z$
%K\_gR}V
public static void swap(int[] data, int i, int j) { J2v=b?NE
int temp = data; ,xn+T)2I
data = data[j]; u/hFf3
data[j] = temp; &b iBm
} lJ62[2=V
} '2WYbcU