[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; Z%HEn$t
} lJz?QI1
int i1=l; YVg}q#
int i2=mid+1; Dry;$C}P
for(int cur=l;cur<=r;cur++){ Oa_o"p<Lr
if(i1==mid+1) -<}>YtB Q
data[cur]=temp[i2++]; O( 5L2G
else if(i2>r) <*6y`X
data[cur]=temp[i1++]; 61Iy{-/ZV
else if(temp[i1] data[cur]=temp[i1++]; >I8hFtAM
else 65`'Upu
data[cur]=temp[i2++]; @qr3v>3X<
} E't G5,/m
} lo]B5_en
~"<VUJ=Ly:
} p?`|CE@h7
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改进后的归并排序: [Yahxw}
j5VRv$P
package org.rut.util.algorithm.support; lWyP[>*
^6NABXL
import org.rut.util.algorithm.SortUtil; w]5f3CIm
MF`k~)bDV
/** pTV@nP
* @author treeroot &T{B~i3w8
* @since 2006-2-2 R82Zr@_
* @version 1.0 3 Q%k(,
*/ e5/DCz
public class ImprovedMergeSort implements SortUtil.Sort { =R24h
w2C!>fJ]1
private static final int THRESHOLD = 10; _%p9B#X<>
/CQQ^/
/* @vYN7
* (non-Javadoc) E.Q} \E
* Z :i"|;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (+Nmio
*/ 8IIdNd
public void sort(int[] data) { !=Kay^J~.
int[] temp=new int[data.length]; x;?1#W
mergeSort(data,temp,0,data.length-1); 4[V6so0
} *d,n2a#n5
d(B;vL@R2V
private void mergeSort(int[] data, int[] temp, int l, int r) { \z2hXT@D
int i, j, k; ~JmxW;|_x)
int mid = (l + r) / 2; \g6 #MNW
if (l == r) O@(.ei*HJ!
return; }${ZI
if ((mid - l) >= THRESHOLD) ALt";8Oa
mergeSort(data, temp, l, mid); eiSO7cGy
else d8q$&(]<
insertSort(data, l, mid - l + 1); fjZveH0
if ((r - mid) > THRESHOLD) zvs 2j"lb
mergeSort(data, temp, mid + 1, r); wb Tg
else N+@@EOmH
insertSort(data, mid + 1, r - mid); nF[eb{GR`
Z a y'/b
for (i = l; i <= mid; i++) { qA_DQ):
temp = data; /:L&uqA
} cZK?kz_Y
for (j = 1; j <= r - mid; j++) { n,'AFb4AF
temp[r - j + 1] = data[j + mid]; ="TOa"Zk
} "BNmpP
int a = temp[l]; >_%g8T'
int b = temp[r]; 3z. >b
for (i = l, j = r, k = l; k <= r; k++) { g8*|"{
if (a < b) { o!dkS/u-m
data[k] = temp[i++]; = Ow&UI
a = temp; :7;Iy u
} else { p{#7\+}
data[k] = temp[j--]; 3eDx@8N }
b = temp[j]; ?*5l}y=
} /n}V7
} /<Nt$n
} =&G|} M
7Sv5fLu2
/** @3=<wz<
* @param data xMGd'l?
* @param l `2U/O .rV
* @param i 3Eux-C!t
*/ E0x$;CG!
private void insertSort(int[] data, int start, int len) { qpH-P8V
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); (Jr;:[4XC
} Oes+na'^
} u=i^F|
} 2&f=4b`Z
} 5GpKX
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堆排序： ^?0,G>I%-
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package org.rut.util.algorithm.support; 2x J5
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import org.rut.util.algorithm.SortUtil; c oz}VMp
]OUOL/J
/** X)+sHcE~#
* @author treeroot vPq\reKe
* @since 2006-2-2 XD>@EYN<X
* @version 1.0 1pr_d"#4
*/ ;rdLYmmx^
public class HeapSort implements SortUtil.Sort{ qk"=nAJX
&otgN<H9
/* (non-Javadoc) HpC4$JMm
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }u)GERWO
*/ *\+'tFT6
public void sort(int[] data) { ;lt;]7
MaxHeap h=new MaxHeap(); j[eEyCW[)
h.init(data); pjn%CR`;
for(int i=0;i h.remove(); Mo=-P2)>lt
System.arraycopy(h.queue,1,data,0,data.length); srA~gzF
} !{0!G
z,P7b]KVe
private static class MaxHeap{ 4hz,F/ I
?m^7O_1
void init(int[] data){ p=T\3_q
this.queue=new int[data.length+1]; c$z_Zi!g#
for(int i=0;i queue[++size]=data; LJ#P- `!{&
fixUp(size); "Jd1&FsCwX
} 2DQC)Pe+z
} ![n`n(oN
KO"iauW
private int size=0; ) O^08]Y g
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private int[] queue; 7FFYSv,[:
}7v2GfEkM
public int get() { a5&j=3)|
return queue[1]; 6&T1 ZY`
} #XPU$=
#| Po&yu4R
public void remove() { +rX,Sl`/
SortUtil.swap(queue,1,size--); U#4W"1~iX
fixDown(1); %;J`dM
} DF =.G1
file://fixdown W=w@SO_?wp
private void fixDown(int k) { ylJlICK
int j; K`<P^XJr
while ((j = k << 1) <= size) { GUXX|W[6
if (j < size %26amp;%26amp; queue[j] j++; xFnMXht
if (queue[k]>queue[j]) file://不用交换 F,:VL*.5kJ
break; sl 5wX
SortUtil.swap(queue,j,k); +w5?{J
k = j; 2>s;xZ@/'R
} s1q d/
} ?A>-_B
private void fixUp(int k) { vX%gcs/@
while (k > 1) { 95&HsgdxJ
int j = k >> 1; ']D( ({%g
if (queue[j]>queue[k]) `,"Jc<R7Z
break; 56dl;Z)
SortUtil.swap(queue,j,k); Z;:-8 HPDY
k = j; tDkqwF),
} `#bcoK5
} WI3!?>d
)]R8 $S
} Y8(yOVy9
39CPFgi<l*
} zYsGI<4
q[ZYlF,Ho
SortUtil： }J`Gm
j!rz@Y3
package org.rut.util.algorithm; )-oNy-YL
Sm5"Q
import org.rut.util.algorithm.support.BubbleSort; \266N;JrN
import org.rut.util.algorithm.support.HeapSort; #>'0C6Xn
import org.rut.util.algorithm.support.ImprovedMergeSort; /-lmfpT
import org.rut.util.algorithm.support.ImprovedQuickSort; Rz]bCiD3 B
import org.rut.util.algorithm.support.InsertSort; -9EbU7>!
import org.rut.util.algorithm.support.MergeSort; m|[Hhw=f
import org.rut.util.algorithm.support.QuickSort; |/$#G0X;H
import org.rut.util.algorithm.support.SelectionSort; 3u<2~!sR
import org.rut.util.algorithm.support.ShellSort; cs)hq4-L`
zx*f*L,6F
/** ?1sY S
* @author treeroot [R$4n-$
* @since 2006-2-2 fBmx +7
* @version 1.0 #s%$kYp 1
*/ QWEK;kUa@
public class SortUtil { :08UeEy
public final static int INSERT = 1; Iq*7F5B
public final static int BUBBLE = 2; S"l&=J2dc
public final static int SELECTION = 3; teb(\% ,
public final static int SHELL = 4; >qla,}x
public final static int QUICK = 5; dXhV]xK
public final static int IMPROVED_QUICK = 6; aHw VoT
public final static int MERGE = 7; f?QD##~;
public final static int IMPROVED_MERGE = 8; !Fi)-o
public final static int HEAP = 9; {Bx\Z0+'&
hSmM OS{
public static void sort(int[] data) { gqG"t@Y+
sort(data, IMPROVED_QUICK); !O*n6}nPE
} $[Ns#7K
private static String[] name={ .:}\Z27-c
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" !=pemLvH
}; Zh$Z$85p
~7v^7;tT
private static Sort[] impl=new Sort[]{ whshjl?a
new InsertSort(), 2Xosj(H
new BubbleSort(), Rk<:m+V=
new SelectionSort(), (_2eiE71
new ShellSort(), tq[C"| dH
new QuickSort(), #@G2n@Hj
new ImprovedQuickSort(), }V{, kK
new MergeSort(), iVRz
new ImprovedMergeSort(), 'J}lnt[V
new HeapSort() 9 +6"<r!
}; _"n4SXhq
|Cm}%sgR\0
public static String toString(int algorithm){ (@zn[Nq
return name[algorithm-1]; TocqoYX{{
} k6XO-a f
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public static void sort(int[] data, int algorithm) { 2B#\683
impl[algorithm-1].sort(data); %o-*~GQ@B
} D c^d$gh
h!.(7qdd
public static interface Sort { {|cA[#j#
public void sort(int[] data); Tn|reXc0e
} v|e>zm<
I`|>'$E[r
public static void swap(int[] data, int i, int j) { Ua4} dW[w
int temp = data; 1D$k:|pP~
data = data[j]; 8cHZBM7'
data[j] = temp; iZUBw
} Y:wds=lA
} a[/p(O