[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; fmb} 2h
} d~1gMz+)
int i1=l; mqSQL}vR
int i2=mid+1; ^h"`}[+
for(int cur=l;cur<=r;cur++){ lXjXqk\
if(i1==mid+1) ]Ccg`AR{
data[cur]=temp[i2++]; K>DRJz
else if(i2>r) Vnr[}<L
data[cur]=temp[i1++]; 8n*.).33
else if(temp[i1] data[cur]=temp[i1++]; <w)r`D6
else O8j_0
data[cur]=temp[i2++]; )'6DNa[y
} t+1 %RyKFB
} $Z\.-QE\
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} Y]B)'[=h
]]oI#*c
改进后的归并排序: 7aQc=^vaZ
+h r@#n4A
package org.rut.util.algorithm.support; no9;<]4
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import org.rut.util.algorithm.SortUtil; 9*{[buZX
)C(?bR
/** &I (#Wy3
* @author treeroot hNH'XQxO
* @since 2006-2-2 YTexv;VNb|
* @version 1.0 \l]DQaOEe
*/ 4DL)rkO
public class ImprovedMergeSort implements SortUtil.Sort { Cc%LztP>
woD>!r>)
private static final int THRESHOLD = 10; j ~1B|,H
Zf65`K3
/* ;3B1_vo9
* (non-Javadoc) NqDHCI
* vM*($qpAy
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) q@nP}Pv&5
*/ 5yzv|mrx
public void sort(int[] data) { gT#&"aP5S
int[] temp=new int[data.length]; ,Qe?8En[
mergeSort(data,temp,0,data.length-1); tm#nUw
} ZI3Nq
{O7X`'[
private void mergeSort(int[] data, int[] temp, int l, int r) { q&W[j5E
int i, j, k; "3)4vuX@;c
int mid = (l + r) / 2; L.jh
if (l == r) XbD4:i%
return; }l],.J\BGX
if ((mid - l) >= THRESHOLD) &iA?+kV
mergeSort(data, temp, l, mid); +KvU$9Ad>
else q gLaa
insertSort(data, l, mid - l + 1); Pl"Nus
if ((r - mid) > THRESHOLD) s0k`p<q
mergeSort(data, temp, mid + 1, r); n1VaLD
else CB/D4j;
insertSort(data, mid + 1, r - mid); 9Bw|(J
5 ({t4dm
for (i = l; i <= mid; i++) { .MJofE;Jn
temp = data; 9&_<f}ou
} (<}&DE
for (j = 1; j <= r - mid; j++) { /q5v"iX]T
temp[r - j + 1] = data[j + mid]; 37|&?||
} 3~S8!nx
int a = temp[l]; EioB%f3
int b = temp[r]; TTt#a6eJ
for (i = l, j = r, k = l; k <= r; k++) { *22nVKi{
if (a < b) { zY('t!u8
data[k] = temp[i++]; @]-jl}:]
a = temp; /eOzXCSws
} else { Ct=-4
data[k] = temp[j--]; Htgx`N|
b = temp[j]; Ft;^g3N
} f'VX Y-
} i-6F:\;
} <oX7P69
!WpBfd>v.I
/** h >s!K9
* @param data \3S8 62B7
* @param l lS'-xEv?
* @param i ` M3w]qJ<}
*/ zN:K%AiGxe
private void insertSort(int[] data, int start, int len) { f^"N!f a
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); LkK~%tY
} Gq }U|Z
} =aoMii
} j"'(sW-
} m|:_]/*qE
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堆排序： /x[jQM\
7|[mz> "d
package org.rut.util.algorithm.support; vDxe/x%
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import org.rut.util.algorithm.SortUtil; 8W#heW\-]
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/** R]btAu;Z
* @author treeroot a8 mVFm
* @since 2006-2-2 L"j tf78
* @version 1.0 < !dqTJos
*/ yRfSJbzaf\
public class HeapSort implements SortUtil.Sort{ KjE+QUa
Y~(Md@!0S
/* (non-Javadoc) <RG|Dx[:=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) DFd%9*N
*/ NF0%}II&xK
public void sort(int[] data) { o)2W`i&
MaxHeap h=new MaxHeap(); \DD0s8
h.init(data); thvYL.U:
for(int i=0;i h.remove(); {'2@(^3
System.arraycopy(h.queue,1,data,0,data.length); tGl;@V@Qj
} 3 "Q=Vl"
[>1OJY.S}T
private static class MaxHeap{ 2U:H545]]
p-/|mL
void init(int[] data){ lAJxr8 .
this.queue=new int[data.length+1]; (3#Cl 1]f
for(int i=0;i queue[++size]=data; 4W)B'+ZK8
fixUp(size); ^n"OL*ipG
} `P3>S(Tgy
} Qe5U<3{JZ
j"|=C$Kn/
private int size=0; !/3B3cG
=<X?sj5
private int[] queue; .NvQm]N0.
g47-db"5
public int get() { de;GrPLAi
return queue[1]; 846$x$G4
} +{W>i;U
3rcKzS7
public void remove() { X90J!
SortUtil.swap(queue,1,size--); .D:Z{|.1
fixDown(1); Z<SLc,]^
} JA'h4AXk
file://fixdown j/nWb`#y
private void fixDown(int k) { )p~BQ~eip;
int j; ^*S)t. "
while ((j = k << 1) <= size) { [-;_ZFS{
if (j < size %26amp;%26amp; queue[j] j++; JNa"8
if (queue[k]>queue[j]) file://不用交换 72Iy^Y[MX
break; K_El&
SortUtil.swap(queue,j,k); ' )?f{
k = j; n1&% e6XhO
} S<WdZ=8sA
} SOi*SwQ8
private void fixUp(int k) { , 'ZD=4_
while (k > 1) { LjUy*mxw
int j = k >> 1; lq>+~zX{
if (queue[j]>queue[k]) jp"JafS/E
break; o;=l^-
SortUtil.swap(queue,j,k); dUF&."pW e
k = j; 7"w2$*4'0
} -xDGH
} ""1^k2fj
"(3BvMA&!9
} J]G?Rc
&b?LP]
} ALNc'MW!
-Gw$#!
SortUtil： j|/]#@Yr
Okm{Xx
package org.rut.util.algorithm; 5K<5kHpvJ{
ni6{pK4Wqm
import org.rut.util.algorithm.support.BubbleSort; zSSB>D
import org.rut.util.algorithm.support.HeapSort; @*Wh
import org.rut.util.algorithm.support.ImprovedMergeSort; `KK>~T_$J
import org.rut.util.algorithm.support.ImprovedQuickSort; z(fAnn T?
import org.rut.util.algorithm.support.InsertSort; +S R+x/?z
import org.rut.util.algorithm.support.MergeSort; kRTwaNDOD
import org.rut.util.algorithm.support.QuickSort; _%B^9Yl3(
import org.rut.util.algorithm.support.SelectionSort; @H7Wb}
import org.rut.util.algorithm.support.ShellSort; >9q&PEc
|iR T! ]
/** ;3kj2}
* @author treeroot E2"q3_,,
* @since 2006-2-2 fVt9X*xKS
* @version 1.0 mXUGe:e8
*/ `xywho%/Y
public class SortUtil { gOr%!QaF
public final static int INSERT = 1; pDh{Z g6t
public final static int BUBBLE = 2; -|Y(V5]
public final static int SELECTION = 3; v|Yh w
public final static int SHELL = 4; &g.+V/<[
public final static int QUICK = 5; L. EiO({W
public final static int IMPROVED_QUICK = 6; VA9Gb9
public final static int MERGE = 7; %_(H{y_!
public final static int IMPROVED_MERGE = 8; m^H21P"z
public final static int HEAP = 9; mdq;R*`
r; xLP
public static void sort(int[] data) { {.De4]ANh
sort(data, IMPROVED_QUICK); CMCO}#
} |R56ho5C
private static String[] name={ r4QxoaM
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" $zyIuJN#
}; RheRe
@~#Ym1{W
private static Sort[] impl=new Sort[]{ QR Ei7@t
new InsertSort(), 5Pd"h S
new BubbleSort(), .9"Y_/0
new SelectionSort(), V\{tmDE
new ShellSort(), AN24Sf'`
new QuickSort(), K)-m*#H&uw
new ImprovedQuickSort(), xw3YK!$sIF
new MergeSort(), Nof3F/2 N&
new ImprovedMergeSort(), 7\9>a
new HeapSort() {qmdm`V[
}; s.x&LG
L W;heO"
public static String toString(int algorithm){ {O,{c\
return name[algorithm-1]; X*,%&6O*
} sL@U
sPpsq
public static void sort(int[] data, int algorithm) { Wa1, p
impl[algorithm-1].sort(data); dpFVN[\oK
} 0%Z]h?EYy|
y /BJIQ
public static interface Sort { xritonG/F
public void sort(int[] data); ]_8qn'7
} i@B[ eta
~>:Z6Le@
public static void swap(int[] data, int i, int j) { h?f>X"*|(
int temp = data; Ai/b\:V9S
data = data[j]; wo3wtx
data[j] = temp; ylB7*>[
} m@Qt.4m%g
} X5`AGyX