[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; w#>CYP`0k6
} OB+QVYk"
int i1=l; J/c5)IB|
int i2=mid+1; .R&jRtb/E
for(int cur=l;cur<=r;cur++){ n-CFB:L
if(i1==mid+1) /,+&O#SX
data[cur]=temp[i2++]; 3Io7!:+
else if(i2>r) xp]_>WGq
data[cur]=temp[i1++]; B~u`bn,iQ
else if(temp[i1] data[cur]=temp[i1++]; o^x,JT
else ^:ehG9
data[cur]=temp[i2++]; zCj#Nfm
} 5&}p'6*K
} s<8|_Dt
X7)B)r}AG
} b2hXFwPe
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改进后的归并排序: [:l=>yJ{(
KK/siG~O
package org.rut.util.algorithm.support; 2Jt*s$
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import org.rut.util.algorithm.SortUtil; %5<Xa
y+M9{[ i/O
/** @zig{b8
* @author treeroot >8gb/?z
* @since 2006-2-2 Q\z9\mMG-
* @version 1.0 F?4&qbdD
*/ i5czm?x
public class ImprovedMergeSort implements SortUtil.Sort { UQJ
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private static final int THRESHOLD = 10; o#V{mm,{Pm
,BlNj^5f
/* knRs{1}Pw{
* (non-Javadoc) ^x}k1F3
* B?;P:!/1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Jy-V\.N>s
*/ 8LGNV&Edg
public void sort(int[] data) { OJ<V<=MYZ
int[] temp=new int[data.length]; l'Uj"9r,
mergeSort(data,temp,0,data.length-1); {\n?IGP?wd
} uiaZ@
17!<8vIV$C
private void mergeSort(int[] data, int[] temp, int l, int r) { pUeok+k_
int i, j, k; gO_d!x*
int mid = (l + r) / 2; )8V=!73
if (l == r) G4J)o?:m@
return; uVzvUz{b
if ((mid - l) >= THRESHOLD) 2E@y0[C?
mergeSort(data, temp, l, mid); 'A'[N :i
else jJe?pT]o
insertSort(data, l, mid - l + 1); _{?-=<V'_
if ((r - mid) > THRESHOLD) m 8P`n
mergeSort(data, temp, mid + 1, r); ;~n^/D2.
else 8]l(D
insertSort(data, mid + 1, r - mid); \s,~|0_V
$u::(s} x<
for (i = l; i <= mid; i++) { mN1n/LNi
temp = data; '~AR|8q?
} tIo b
for (j = 1; j <= r - mid; j++) { ^8 cq qu
temp[r - j + 1] = data[j + mid]; /vw$3,*z
} e9rgJJ
int a = temp[l]; }k_'a^;C1
int b = temp[r]; !5>PZ{J
for (i = l, j = r, k = l; k <= r; k++) { %G'P!xQhy
if (a < b) { ?l^NKbw
data[k] = temp[i++]; 8]xYE19=
a = temp; S.*LsrSV
} else { _''9-t;n,
data[k] = temp[j--]; k6(0:/C
b = temp[j]; J(Zz^$8]<?
} }KR"0G[f
} |_%q@EID
} T<o8lL
*JiI>[
/** qR9!DQc'
* @param data uevhW
* @param l !qug^F
* @param i #?7g_
*/ ?~tx@k$;Es
private void insertSort(int[] data, int start, int len) { f<3lxu
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); af}JS2=$
} E[c6*I
} Dh)(?"^9A
} mtVoA8(6
} h<bCm`qj
j-7aJj%
堆排序： 8_T9[]7V8
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package org.rut.util.algorithm.support; mQ^SpK #
yhd]s0(!
import org.rut.util.algorithm.SortUtil; W@Rb"5Gy+
@81N{tg-
/** * 5(%'3
* @author treeroot TPNKvv!s
* @since 2006-2-2 ev1:0P
* @version 1.0 rYrvd[/*&(
*/ %g~zEa-g
public class HeapSort implements SortUtil.Sort{ lec3rv0)
.a9f)^
/* (non-Javadoc) W'R^GIHs
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) T (? CDc+
*/ (9v%66y
public void sort(int[] data) { q5\iQ2f{WV
MaxHeap h=new MaxHeap(); #E#Fk3-ljQ
h.init(data); &A~hM[-
for(int i=0;i h.remove(); hY|-l%2f
System.arraycopy(h.queue,1,data,0,data.length); 05o<fa2HE
} W;|%)D)y
'q1cc5(ueV
private static class MaxHeap{ \W7pSV-U
t@q==VHF
void init(int[] data){ DY1"t7 9E
this.queue=new int[data.length+1]; Hh* KcIRX
for(int i=0;i queue[++size]=data; UHBMl>~z
fixUp(size); #q6#nfi"
} >O~
} lg*?w/JX+
S%jFH4#
private int size=0; 5TLE%#G@+
iKG,"
private int[] queue; )&qr2Cm*
e//jd&G
public int get() { )a<MW66
return queue[1]; {TaYkuWS
} F[>Y8e<[
nBwDq^
public void remove() { D&G^|: G
SortUtil.swap(queue,1,size--); \Yh*ywwP#
fixDown(1); |g1Pr9{wy
} I/go$@E"
file://fixdown p;~oIy\,
private void fixDown(int k) { .pIO<ZAFT
int j; %$67*pY'JH
while ((j = k << 1) <= size) { +NVXFjPC
if (j < size %26amp;%26amp; queue[j] j++; Cm9#FA
if (queue[k]>queue[j]) file://不用交换 2IXtIE
break; $J#Z`%B^y
SortUtil.swap(queue,j,k); ,@\z{}~v
k = j; e<+b?@}=B
} -?NAA]P5c@
} \s7/`
private void fixUp(int k) { /4KHf3Nr
while (k > 1) { kc<5wY_t
int j = k >> 1; lLLPvW[Q
if (queue[j]>queue[k]) WG +]
break; ~bz$]o-<
SortUtil.swap(queue,j,k); 9K-,#a
k = j; uobQS!
} vb3hDy
} 8WC_CAP
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} ZtY?X- 4_
~Gl5O`w(
} FT!Xr
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SortUtil： 8y;gs1d;A
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package org.rut.util.algorithm; LMuDda
]~!CJ8d
import org.rut.util.algorithm.support.BubbleSort; p-H}NQ\
import org.rut.util.algorithm.support.HeapSort; T[MDjhv'
import org.rut.util.algorithm.support.ImprovedMergeSort; I]BhkJ
import org.rut.util.algorithm.support.ImprovedQuickSort; ZO>)GR2S
import org.rut.util.algorithm.support.InsertSort; [}l#cG6 k
import org.rut.util.algorithm.support.MergeSort; RDEK=^J
import org.rut.util.algorithm.support.QuickSort; w:x[kA
import org.rut.util.algorithm.support.SelectionSort; 4gZ)9ya
import org.rut.util.algorithm.support.ShellSort; \["I.gQ
Wl}J=
/** 4'Ya-xx
* @author treeroot taMcm}*T1
* @since 2006-2-2 a)I>Ns)
* @version 1.0 pJuD+v
*/ v#e*RI2}
public class SortUtil { %,e,KcP'
public final static int INSERT = 1; _7~q|
public final static int BUBBLE = 2; x=kJlGT
public final static int SELECTION = 3; f,ZJFb98
public final static int SHELL = 4; .o]9 HbIk5
public final static int QUICK = 5; 6C\WX(@4
public final static int IMPROVED_QUICK = 6; A(H2Gt D
public final static int MERGE = 7; VCwC$ts
public final static int IMPROVED_MERGE = 8; Yv0y8Vz@
public final static int HEAP = 9; ?Ezy0>j
wN^^_
public static void sort(int[] data) { Ao#bREm
sort(data, IMPROVED_QUICK); trB-(B%5
} VF g(:
private static String[] name={ .[Qi4jm>`
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" \fp'=&tp~a
}; cp0yr:~
fYpJ2y-sA
private static Sort[] impl=new Sort[]{ {ft |*
new InsertSort(), j8aH*K-l{
new BubbleSort(), ;#mm_*L%@
new SelectionSort(), ~+V$0Q;L
new ShellSort(), i:jns>E
new QuickSort(), 'H#0-V"=
new ImprovedQuickSort(), R<ORw]
new MergeSort(), lCTXl5J5
new ImprovedMergeSort(), Zr=B8wuT
new HeapSort() ?FwHqyFVlQ
}; fzOh3FO+
mA"[x_
public static String toString(int algorithm){ piqh7u3~
return name[algorithm-1]; Ya(3Z_f+VZ
} #2"'tHf4
@!}/$[hu1
public static void sort(int[] data, int algorithm) { A.h0H]*Ma
impl[algorithm-1].sort(data); \v$zU
} {Ppb ;
7U^{xDg.b
public static interface Sort { N(3Bzd)
public void sort(int[] data); kDxI7$]E
} EBiLe;=X
Z
public static void swap(int[] data, int i, int j) { O+/{[9s
int temp = data; $&1Dl
data = data[j]; 3to!C"~\K-
data[j] = temp; J^S!GG'gb
} ,X;$-.
} ydj*Jy'