[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; %x Xib9J
} Tno[LP,
int i1=l; n4* hQi+d
int i2=mid+1; ]gxt+'iAFS
for(int cur=l;cur<=r;cur++){ eJh4hp;x
if(i1==mid+1) e@B+\1
data[cur]=temp[i2++]; }1N$4@
else if(i2>r) +1`Zu$|
data[cur]=temp[i1++]; qJ\tc\
else if(temp[i1] data[cur]=temp[i1++]; g(9\r
else kB`t_`7f
data[cur]=temp[i2++]; P[|FK(l
} ^g[,}t:/d
} f(Hh(
=v(MdjwFl
} G|WO
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改进后的归并排序: Q"2t:
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package org.rut.util.algorithm.support; o\Ocu>:
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import org.rut.util.algorithm.SortUtil; [8T
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/** d~lB4
* @author treeroot ~hJ/&,vH!
* @since 2006-2-2 ;THb6Jz/+
* @version 1.0 M!KHBr
*/ 8UAbTqB-
public class ImprovedMergeSort implements SortUtil.Sort { ulcm
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private static final int THRESHOLD = 10; co <ATx
]6PX4oK_t
/* A (:7q4
* (non-Javadoc) UIpW#t
* je9eJUKE
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) q?Jd.r5*
*/ uydy[n\
public void sort(int[] data) { pI__<
int[] temp=new int[data.length]; v^Vr^!3
mergeSort(data,temp,0,data.length-1); j\,HquTR
} $}{u6*u.,
T?p'R
private void mergeSort(int[] data, int[] temp, int l, int r) { }7`HJ>+m)H
int i, j, k; H<^*V8J 'w
int mid = (l + r) / 2; 41pk )8~pt
if (l == r) l~f>ve|
return; BE&P/~(C
if ((mid - l) >= THRESHOLD) I=N;F6
mergeSort(data, temp, l, mid); D)yCuw{M:
else @y{i.G
insertSort(data, l, mid - l + 1); pHW Qk z(
if ((r - mid) > THRESHOLD) 5IK -V)
mergeSort(data, temp, mid + 1, r); uVO*@Kj+
else Pc=S^}+
insertSort(data, mid + 1, r - mid); UKIDFDn6_
Rnl 4
for (i = l; i <= mid; i++) { ^LA.Y)4C2%
temp = data; 2>Uy`B|f
} FQV]/
for (j = 1; j <= r - mid; j++) { L&C<-BA/
temp[r - j + 1] = data[j + mid]; nG0Uv%?{pj
} c&A;0**K,
int a = temp[l]; --ED]S 8
int b = temp[r]; ?dWfupO{
for (i = l, j = r, k = l; k <= r; k++) { 2r3]DrpJ
if (a < b) { ] D(laqS;"
data[k] = temp[i++]; ?DN4j!/$
a = temp; e ]@Ex
} else { (}$~)f#s
data[k] = temp[j--]; 6mawcK:7
b = temp[j]; <tT*.nM\
} -3YsrcJi
} |sM#nhxK
} amPC C
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/** c*O{?b
* @param data c1v,5c6d j
* @param l qr5ME/)z
* @param i w(lxq:>"
*/ gq$]jWtCD
private void insertSort(int[] data, int start, int len) { 9J"Y
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); r#Pkhut
} 5H+S=
} R~jV
} .Yl*kG6r
} a59l"b
njz:7]>e
堆排序： Tk9/1C{8
M4;A4V=W
package org.rut.util.algorithm.support; 6bL"ZOEu
9*?H/iN@p?
import org.rut.util.algorithm.SortUtil; T<p,KqH
B{ i5UhxD
/** W]8tp@
* @author treeroot wH:'5+u:6
* @since 2006-2-2 2>s@2=Aq
* @version 1.0 YNGG> ;L
*/ Sa V]6/|
public class HeapSort implements SortUtil.Sort{ PI"&-lXI-m
?0Xt|
/* (non-Javadoc) <lk_]+ XJ3
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .3(=UQ
*/ .Yxx
public void sort(int[] data) { yPKDn.1
MaxHeap h=new MaxHeap(); vt;<+"eps
h.init(data); 0:W*_w0Ge
for(int i=0;i h.remove(); 7e,EI9?.
System.arraycopy(h.queue,1,data,0,data.length); 7\'ow|)}v
} Ga4Ru
L{>XT
private static class MaxHeap{ X#s:C=q1
!}sYPz]7!
void init(int[] data){ OL{U^uOhY
this.queue=new int[data.length+1]; "s']@Qv
for(int i=0;i queue[++size]=data; u8Ul +u
fixUp(size); |?c v5l7E
} |TOz{
} $qN+BKd]3
cJ 5":^O
private int size=0; i!/V wGg
C[j'0@~V:B
private int[] queue; T)o)%Yv
F,^<
public int get() { []K5l%
return queue[1]; #;F1+s<|QJ
} 9v(&3,)a
5a9PM(
public void remove() { v=b`kCH}
SortUtil.swap(queue,1,size--); xg~ Baun
fixDown(1); MSPzOJQPy
} K5x&:z
file://fixdown #]G$o?@Y=^
private void fixDown(int k) { jWb;Xk4
int j; -I1Ne^DZn4
while ((j = k << 1) <= size) { Pnb?NVP!^9
if (j < size %26amp;%26amp; queue[j] j++; Y(WX`\M97
if (queue[k]>queue[j]) file://不用交换 'C6K\E
break; dZ UB
SortUtil.swap(queue,j,k); H<dOh5MFh
k = j; aHKv*-z-
} KZn\ iwj
} $'}:nwq6x
private void fixUp(int k) { M9MfO*
while (k > 1) { u</21fz'
int j = k >> 1; ~ifo7,
if (queue[j]>queue[k]) UzVnC:
break; P,Fs7
SortUtil.swap(queue,j,k); Aa*UV6(v
k = j; M*)}F
} B7qm;(?X&
} +{ QyB
umXa
} 48]1"h%*qB
#!\g5 ')mC
} wK@k}d
Mn(:qQo^&`
SortUtil： brN:Ypf-e
4LYeacL B
package org.rut.util.algorithm; wU_e/+0h
Q7`}4c)
import org.rut.util.algorithm.support.BubbleSort; qw[)$icP
import org.rut.util.algorithm.support.HeapSort; [Q,E( s
import org.rut.util.algorithm.support.ImprovedMergeSort; uX@RdkC
import org.rut.util.algorithm.support.ImprovedQuickSort; h?2qX
import org.rut.util.algorithm.support.InsertSort; 4oLrCQZ\
import org.rut.util.algorithm.support.MergeSort; ![os5H.b#q
import org.rut.util.algorithm.support.QuickSort; R9gK>}>Y
import org.rut.util.algorithm.support.SelectionSort; e7/ b@
import org.rut.util.algorithm.support.ShellSort; X:\r )
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/** tk4~ 8
* @author treeroot yG?,8!/]
* @since 2006-2-2 bit&H
* @version 1.0 |`9POl=
*/ #5)E4"m
public class SortUtil { sHO6y0P
public final static int INSERT = 1; t&(}`W
public final static int BUBBLE = 2; ,Z*?"d
public final static int SELECTION = 3; 6sb,*uSn%
public final static int SHELL = 4; IbQ3*
public final static int QUICK = 5; Ji SJi?
public final static int IMPROVED_QUICK = 6; U3MfEM!x
public final static int MERGE = 7; ^G{3x
public final static int IMPROVED_MERGE = 8; +_uT1PsBY
public final static int HEAP = 9; K2<Q9 ,vt
aG QC
public static void sort(int[] data) { :0ZFbIy
sort(data, IMPROVED_QUICK); Px&*&^Gf[b
} [Y.3miE
private static String[] name={ xn(lkQ6Fm
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" w\KO1 Ob
}; *+h2,Z('a
|cL'4I>b9
private static Sort[] impl=new Sort[]{ tF SO"
new InsertSort(), %..{c#V
new BubbleSort(), H27_T]\
new SelectionSort(), #/t^?$8\\
new ShellSort(), Pq`]^^=be'
new QuickSort(), ^R\0<\'
new ImprovedQuickSort(), WlU^+ctS
new MergeSort(), b Mi,z3z
new ImprovedMergeSort(), Iz^~=yV)
new HeapSort() 8D[P*?O
}; &;5QB
iZGc'y
public static String toString(int algorithm){ }R*[7V9"
return name[algorithm-1]; UOH2I+@V
} 5+dQGcE@
V*SKWP
public static void sort(int[] data, int algorithm) { +=hiLfnE
impl[algorithm-1].sort(data); M >Yx_)<U
} 4AB7uw
#4_'%~-e
public static interface Sort { zbZ0BD7e
public void sort(int[] data); Y~(#_K
} a)GLz
XHcT7}]
public static void swap(int[] data, int i, int j) { %qL0=ad
int temp = data; =Y>_b 2
data = data[j]; ['j_W$8n
data[j] = temp; 61>@-55k9
} oe,L&2Jz@
} Ej>5PXp'2