[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; eTY""EWU
} PQ`~qM:3st
int i1=l; tCP;IU$
int i2=mid+1; x[eho,6)
for(int cur=l;cur<=r;cur++){ ^)[jBUT
if(i1==mid+1) Uz; pNWMk
data[cur]=temp[i2++]; $_&gT.>
else if(i2>r) >KnXj7
data[cur]=temp[i1++]; 6 2#dSd}HG
else if(temp[i1] data[cur]=temp[i1++]; F\hU V[
else Zjkrne{
data[cur]=temp[i2++]; #~>ykuq
} *mj3 T
} :7Smsc"B!
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} wT+b|K
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改进后的归并排序: k_%"#
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package org.rut.util.algorithm.support; Wk&g!FR
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import org.rut.util.algorithm.SortUtil; &KZr`"cT#
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/** o+T%n1$+V
* @author treeroot zd+<1R;
* @since 2006-2-2 is [p7-
* @version 1.0 v08Xe*gNU
*/ 4! V--F
public class ImprovedMergeSort implements SortUtil.Sort { n%Gk {h5
6YeEr!zt%
private static final int THRESHOLD = 10; } :8{z`4H
mU3 @|a/@0
/* PQFr4EY?i
* (non-Javadoc) z&r@c-l@
* }Kc03Ue`%e
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7`IoQvX
*/ 1:r8p6
public void sort(int[] data) { 2En^su$
int[] temp=new int[data.length]; g1TMyIUt[
mergeSort(data,temp,0,data.length-1); #.kDin~!
} )FnJLd
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private void mergeSort(int[] data, int[] temp, int l, int r) { C0$KpUB
int i, j, k; OcWzo#q4[
int mid = (l + r) / 2; tEXY>=
if (l == r) i{ " g7
return; -'iV-]<
if ((mid - l) >= THRESHOLD) W%bzA11l
mergeSort(data, temp, l, mid); ^YLk&A)X
else ;m[-yqX
insertSort(data, l, mid - l + 1); eJ3w}"?9s
if ((r - mid) > THRESHOLD) U:n3V
mergeSort(data, temp, mid + 1, r); LyB &u()
else ;$Q&2}L[
insertSort(data, mid + 1, r - mid); ,XJ Xw(LM
ogrh"
for (i = l; i <= mid; i++) { x8]5> G8(r
temp = data; @{|vW
} `Z3p( G
for (j = 1; j <= r - mid; j++) { _Bp{~-fO
temp[r - j + 1] = data[j + mid]; T3W?-,
} XAb!hc
int a = temp[l]; a2MFZe
int b = temp[r]; '8$*gIQ8
for (i = l, j = r, k = l; k <= r; k++) { 3{wmKo|_X
if (a < b) { y@'m D*z
data[k] = temp[i++]; l,pI~A`w_
a = temp; eiJ13`T
} else { #@#/M)
data[k] = temp[j--]; N^{"k,vB-
b = temp[j]; MY[QYBkn}
} dF?:&oP]
} ?=22@Q}g
} ;6T>p
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/** Sas&P:#r
* @param data |NsrO8H
* @param l Z?7XuELKV
* @param i 1I{^]]qw
*/ -f+U:/'.>v
private void insertSort(int[] data, int start, int len) { VKjDK$
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); S8{Sb>
} nsRZy0@$t
} =Qa*-*
} )9.i'{{ 0
} jI-\~
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堆排序： |)7dh B
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package org.rut.util.algorithm.support; wcdD i[E>i
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import org.rut.util.algorithm.SortUtil; 7~2/NU?
Y'75DE<BC
/** X/5\L.g2
* @author treeroot IwE{Zvr
* @since 2006-2-2 LV^V`m0#
* @version 1.0 ^sWsP`DV
*/ +, SUJ|
public class HeapSort implements SortUtil.Sort{ 1nt VM+
&m>yY{be
/* (non-Javadoc) VI}.MnCa
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7lo`)3mB
*/ A@-A_=a,
public void sort(int[] data) { ?f\;z<e|
MaxHeap h=new MaxHeap(); 9rB,7%@EL
h.init(data); =`8%qh
for(int i=0;i h.remove(); d:U2b"k=/u
System.arraycopy(h.queue,1,data,0,data.length); [r,ZM
} aaN|g{pX
\Bg;^6U
private static class MaxHeap{ DE{tpN
#s'UA!)
void init(int[] data){ (5^bU<
this.queue=new int[data.length+1]; =Me94w>G3X
for(int i=0;i queue[++size]=data; {HJzhIgCf
fixUp(size); D[m+=-
} x6, #Jp
} NW/RQ(
kl0!*j
private int size=0; X-tc Ud
.,)C^hs@
private int[] queue; n/ \{}9
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public int get() { ewo1^&#>
return queue[1]; d)G'y
} ?!N@%R>5rN
j89C~xP6
public void remove() { i2a""zac
SortUtil.swap(queue,1,size--); `}b#O}z)^
fixDown(1); X+'z@xpj
} sH//*y
file://fixdown j{.P'5e@pZ
private void fixDown(int k) { "T*Sg
int j; _QD##`<
while ((j = k << 1) <= size) { -Y*"!8
if (j < size %26amp;%26amp; queue[j] j++; mkA1Sh{hX>
if (queue[k]>queue[j]) file://不用交换 ])d_B\)Kck
break; w]4=uL6
SortUtil.swap(queue,j,k); a(+.rf;
k = j; :UjF<V
} ;.=ZwM]C
} *W'F6Hpu
private void fixUp(int k) { y7K&@Y
while (k > 1) { N;<.::x
int j = k >> 1; y^7ol;t
if (queue[j]>queue[k]) yPgDb[V+
break; F %OA
SortUtil.swap(queue,j,k); CM}1:o<<N
k = j; n:hHm,
} `+IB;G1
} ohK_~
0KW@j>=jK
} E*[dc
_JlbVe[<
} #Y*?kTF
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SortUtil： ;Z\1PwT
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package org.rut.util.algorithm; c7$L:
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import org.rut.util.algorithm.support.BubbleSort; #~A(%a
import org.rut.util.algorithm.support.HeapSort; H%,jB<-.A
import org.rut.util.algorithm.support.ImprovedMergeSort; 8MHYk>O~{G
import org.rut.util.algorithm.support.ImprovedQuickSort; p0 @,-
import org.rut.util.algorithm.support.InsertSort; ^;";fr Vw
import org.rut.util.algorithm.support.MergeSort; J%G EIe|
import org.rut.util.algorithm.support.QuickSort; T#;W5<"
import org.rut.util.algorithm.support.SelectionSort; :]EAlaB4Q
import org.rut.util.algorithm.support.ShellSort; 8dg\_H_
Z(fXN$
/** h28")c.pH=
* @author treeroot {Y>5 [gp
* @since 2006-2-2 9FB[`}
* @version 1.0 q=NI}k
*/ en"]u,!
public class SortUtil { \#LkzN8
public final static int INSERT = 1; pGQP9r%
public final static int BUBBLE = 2; w! J|KM
public final static int SELECTION = 3; hu?Q,[+o
public final static int SHELL = 4; 2K^D%U
public final static int QUICK = 5; ?xftr(
public final static int IMPROVED_QUICK = 6; ^*CvKCS
public final static int MERGE = 7; G?:{9. (
public final static int IMPROVED_MERGE = 8; ~}uv4;0l]
public final static int HEAP = 9; 8nt3Sm
r57&F`{
public static void sort(int[] data) { $;kFuJF
sort(data, IMPROVED_QUICK); "Di27Rq
} YX A|1
private static String[] name={ 1J`<'{*
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" l@;UwnI
}; ;kSRv=S
@DiXe[kI
private static Sort[] impl=new Sort[]{ 8*nv+
new InsertSort(), C5}c?=#bdf
new BubbleSort(), {1 VHz])I
new SelectionSort(), 4LG[i}u.N
new ShellSort(), #@ClhpLD
new QuickSort(), V=$pXpro%
new ImprovedQuickSort(), L]wWJL
new MergeSort(), `SFA`B)[5@
new ImprovedMergeSort(), t0*kL.
new HeapSort() %7w=;]ym
}; 1M1|Wp
a ~s:f5S>
public static String toString(int algorithm){ `,lm:x+(0
return name[algorithm-1]; H7`JqS
} ;rggO0Y
\,UpFuU\
public static void sort(int[] data, int algorithm) { #$5"&SM
impl[algorithm-1].sort(data); )b%t4~7
} 4>x$I9^Y!
|`T$Iq
public static interface Sort { lu_kir~
public void sort(int[] data); 6o5NeKZ
} YC!IIE_
]%%I=r
public static void swap(int[] data, int i, int j) { {l E\y9
int temp = data; '99rXw
data = data[j]; %bN+Y'
data[j] = temp; CpE LLA<
} ABx< Ep6
} l|kGp~