[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; e)Be*J]4
} uh][qMyLM
int i1=l; ^RS?y8
int i2=mid+1; 2itJD1;
for(int cur=l;cur<=r;cur++){ =lE_ Q[P
if(i1==mid+1) tqnvC UIE
data[cur]=temp[i2++]; sO5~!W>Z
else if(i2>r) efK|)_i :
data[cur]=temp[i1++]; E*uz|w3S)Y
else if(temp[i1] data[cur]=temp[i1++]; x}8 U\
else Jvk!a~e
data[cur]=temp[i2++]; DvBL#iC
} dK5|tWJX
} Q :<&<i=I
2hlb$N-hk
} vp"b_x1-
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改进后的归并排序: epcBr_}
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package org.rut.util.algorithm.support; KfSI6 Y_
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import org.rut.util.algorithm.SortUtil; YH0=YmU#X
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/** E3):8>R;1
* @author treeroot gJkk0wokC
* @since 2006-2-2 W'>"E/Tx#O
* @version 1.0 LSR{N|h+)
*/ +/bT4TkML
public class ImprovedMergeSort implements SortUtil.Sort { V<ZohB?y
K,!"5WrX*
private static final int THRESHOLD = 10; W+F^(SC\
u9TiEEof3
/* , ;'y <GA
* (non-Javadoc) eQiK\iDS
* $50/wb6s
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Gk!06
*/ .4jU G=
public void sort(int[] data) { z qM:'x*
int[] temp=new int[data.length]; XZ8#8Di8
mergeSort(data,temp,0,data.length-1); q;W(;B
} Nq$Xe~,*
r#%e$
private void mergeSort(int[] data, int[] temp, int l, int r) { dB{VY+!
int i, j, k; {0&'XA=j
int mid = (l + r) / 2; B4hT(;k
if (l == r) D7D:?VoR
return; |f:1Br
if ((mid - l) >= THRESHOLD) 4x`.nql
mergeSort(data, temp, l, mid); hSg4A=y
else "sM 3NY
insertSort(data, l, mid - l + 1); R-L*N$@!
if ((r - mid) > THRESHOLD) CJ@G8>
mergeSort(data, temp, mid + 1, r); Rxg^vM*
else j4!g&F _y
insertSort(data, mid + 1, r - mid); &!kD81?Mm
lg9`Z>?
for (i = l; i <= mid; i++) { 5IwQ<V
temp = data; Lrr1) h
} $Ur-Q d
for (j = 1; j <= r - mid; j++) { wM]j#
temp[r - j + 1] = data[j + mid]; 0R#T3K}
} I;Sg9`k=
int a = temp[l]; pb\W7G
int b = temp[r]; >=T\=y
for (i = l, j = r, k = l; k <= r; k++) { &Z.zem?n
if (a < b) { l8$7N=Y
data[k] = temp[i++]; bv%A;
a = temp; %,Pwo{SH
} else { ySS kw7
data[k] = temp[j--]; uxxS."~
b = temp[j]; e\9H'$1\
} UBgheu
} Tlz $LI
} T6P9Icv?@7
;Q1/53Y<
/** w9Eb\An
* @param data MPexc5_
* @param l m(CbMu
* @param i 6 4fB$
*/ =;) M+"
private void insertSort(int[] data, int start, int len) { ogOUrJ}P
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); QSaJb?I
} `egyk)"aM
} _&U5 u
} A9?h*/$
} &!adW@y
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堆排序： B9Ha6kj
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package org.rut.util.algorithm.support; i uNBw]
p^E}%0#
import org.rut.util.algorithm.SortUtil; T%opkyP>=
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/** )|Ho"VEmg
* @author treeroot 5Tb3Yy< .
* @since 2006-2-2 53i7:1[uV
* @version 1.0 r8k.I4
*/ qv+8wJ((
public class HeapSort implements SortUtil.Sort{ Q#,j,h
K;n5[o&c
/* (non-Javadoc) IK /@j
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !%1=|PX_
*/ $69ef[b
public void sort(int[] data) { |?kZfr&9q
MaxHeap h=new MaxHeap(); miq"3
h.init(data); gvoo1 Sa
for(int i=0;i h.remove(); ;&A%"8o
System.arraycopy(h.queue,1,data,0,data.length); kOQq+_Y
} "F$0NYb]I
WgV'T#*
private static class MaxHeap{ zRz7*o&l
.3tyNjsn\
void init(int[] data){ T##_?=22I
this.queue=new int[data.length+1]; 09r0Rb
for(int i=0;i queue[++size]=data; jOE~?{8m
fixUp(size); `X=2Ff
} 5@:c6(5$
} {eQ')f
pYtvenBy
private int size=0; -9L[eYn
w`77E=
private int[] queue; 3Mw2;.rk
Xyf7sHQ
public int get() { RH"&B`
return queue[1]; >_<J=8|E
} iJr 1w&GL$
GOzV#
public void remove() { NY& |:F
SortUtil.swap(queue,1,size--); =s\RK
fixDown(1); :J'ibb1
} ,)CRozC\}K
file://fixdown 4;_<CB
private void fixDown(int k) { o|FY-+
int j; IhRYV`:
while ((j = k << 1) <= size) { -%h0`hOG{
if (j < size %26amp;%26amp; queue[j] j++; 60A E~
if (queue[k]>queue[j]) file://不用交换 UP*\p79oO
break; nj@l5[
SortUtil.swap(queue,j,k); p?#cn
k = j; R24ZjbKL
} (ohza<X;6
} <]/z45?
private void fixUp(int k) { 3 E~d
while (k > 1) { 3XOf-v:~
int j = k >> 1; VgoN=S
if (queue[j]>queue[k]) TsX(=N_
break; o C5}[cYD`
SortUtil.swap(queue,j,k); U'Xw'?Uj
k = j; mp\`9j+{
} hlgBx~S[
} |PI]v`[
z]d^%>Ef
} Qxvj`Ge
UB4M=R|
} RgPY,\_9+
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SortUtil： UT^-!L LB]
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package org.rut.util.algorithm; g#=~A&4q
f\Fk+)e@
import org.rut.util.algorithm.support.BubbleSort; :=<0Z1S
import org.rut.util.algorithm.support.HeapSort; e2onR~Cf
import org.rut.util.algorithm.support.ImprovedMergeSort; H"_]Hq
import org.rut.util.algorithm.support.ImprovedQuickSort; q*h1=H52
import org.rut.util.algorithm.support.InsertSort; :=0XT`iY
import org.rut.util.algorithm.support.MergeSort; @aA1=9-L
import org.rut.util.algorithm.support.QuickSort; -quWnn/
import org.rut.util.algorithm.support.SelectionSort; CQLh;W`Dc
import org.rut.util.algorithm.support.ShellSort; XO=UKk+EK
R m{\ R
/** @rTAbEk{U
* @author treeroot @\!9dK-W
* @since 2006-2-2 icX$<lD
* @version 1.0 6L2Si4OGjG
*/ vfh0aW-O
public class SortUtil { K]b_JDEk
public final static int INSERT = 1; azUEp8`|
public final static int BUBBLE = 2; `wyX)6A|bt
public final static int SELECTION = 3; 49BLJ|:P?
public final static int SHELL = 4; /pa8>_,~
public final static int QUICK = 5; ^w+jPT-n
public final static int IMPROVED_QUICK = 6; R]-$]koQO
public final static int MERGE = 7; NW$C1(oT
public final static int IMPROVED_MERGE = 8; ice7J2r_
public final static int HEAP = 9; &|:T+LVv$+
P p}N-me>_
public static void sort(int[] data) { Z1(-FT6O
sort(data, IMPROVED_QUICK); T@GR Tg
} ()E:gqQ
private static String[] name={ +hz^( I7
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" )>! IY Q
}; sF/X#GG-
L?@TF;
private static Sort[] impl=new Sort[]{ V!'N:je
new InsertSort(), /$IF!q+C
new BubbleSort(), is3nLm(
new SelectionSort(), %PsDS
new ShellSort(), QSn%~o05
new QuickSort(), O$><E8q
new ImprovedQuickSort(), t*fG;YOg
new MergeSort(), i>Cxi ZT
new ImprovedMergeSort(), ")q{>tV
new HeapSort() ~N i#xa
}; yrDWIU(8;6
-V'`;zE6
public static String toString(int algorithm){ yqg&dq
return name[algorithm-1]; No\H QQ
} [ imC21U
,sAN,?eG~
public static void sort(int[] data, int algorithm) { [n`SXBi+n
impl[algorithm-1].sort(data); X9:(}=E V
} &wZ ggp
I<w`+<o(
public static interface Sort { !n=@(bT*wT
public void sort(int[] data); 6zQ {Y"0
} A%VBBvk
;x[F4d
public static void swap(int[] data, int i, int j) { ,RkL|'1l
int temp = data; x04JU$@
data = data[j]; a<.7q1F
data[j] = temp; >.D0McQg
} ;w(]z
} ;%1ob f 89