[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; o$QC:%[#
} $E/N
int i1=l; }~NM\rm
int i2=mid+1; C5Vlqc;
for(int cur=l;cur<=r;cur++){ d`gKF
if(i1==mid+1) V15/~
data[cur]=temp[i2++]; ^(kmFUV,Z
else if(i2>r) w#v-h3XcF
data[cur]=temp[i1++]; ?K\r-J!Y
else if(temp[i1] data[cur]=temp[i1++]; ZH)Jq^^RI
else 9dVHh?E
data[cur]=temp[i2++]; lvAKL>qX
} qnb#~=x^
} .oS[ DTn5S
&w!(.uDO
} e0<Wed
u>ZH-nw O
改进后的归并排序: BOflhoUX
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package org.rut.util.algorithm.support; 23d*;ri5
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import org.rut.util.algorithm.SortUtil; 0fGt7 "Q
xX?9e3(
/** d>gQgQ;g
* @author treeroot r>#4Sr
* @since 2006-2-2 frokl5L@
* @version 1.0 IG.!M@_
*/ >*MGF=.QG
public class ImprovedMergeSort implements SortUtil.Sort { YEa<zhO8
9Y:Iha`$w
private static final int THRESHOLD = 10; L\hid/NL
W(}2R>$
/* w~C\5 i
* (non-Javadoc) -x{@D{Q%
* MQe|\SMd
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .sjv"D"
*/ @;G%7&ps
public void sort(int[] data) { C{:U<q
int[] temp=new int[data.length]; q`VkA \
mergeSort(data,temp,0,data.length-1); j[,XJ,5=
} I5*<J n
:qc?FQ ;
private void mergeSort(int[] data, int[] temp, int l, int r) { pocXQEg$]
int i, j, k; XU<XK9EA
int mid = (l + r) / 2; 2:RFPK
if (l == r) 6u'E}hAx|
return; -d9L
if ((mid - l) >= THRESHOLD) J`4V\D}n
mergeSort(data, temp, l, mid); ?bH`
else Mp QsM-iW
insertSort(data, l, mid - l + 1); % *ng *
if ((r - mid) > THRESHOLD) Wf3{z D~
mergeSort(data, temp, mid + 1, r); O7%8FY
else SP\s{,'F-b
insertSort(data, mid + 1, r - mid); ;VzdlCZ@
wh#IQ.E-
for (i = l; i <= mid; i++) { I<Cm$8O?
temp = data; l,6' S8=
} 1pK(tm
for (j = 1; j <= r - mid; j++) { Q/@ pcU
temp[r - j + 1] = data[j + mid]; d/3bE*gr
} n/Dg)n?
int a = temp[l]; e,xJ%f
int b = temp[r]; Zt& 7p
for (i = l, j = r, k = l; k <= r; k++) { LSR0yCU
if (a < b) { i=R%MH+
data[k] = temp[i++]; K8/jfm
a = temp; E9b>wP
} else { 1+"d-`'Z2O
data[k] = temp[j--]; qpQiMiB#g'
b = temp[j]; ]Q,&7D Ah
} w`EC6ZN
} GTi=VSGqF
} n{\d
0nvT}[\H*
/** '0^lMQMg
* @param data ly69:TR7I
* @param l 'pyIMB?x
* @param i od$$g(
*/ DJ0jtv6nQ-
private void insertSort(int[] data, int start, int len) { )gz]F_
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); _R^ZXtypd
} aeVd.`lxM
} '9'f\
} G5|'uKz2"
} 62kA(F0e,
XTA:Y7"O
堆排序： #]QS
DxD\o+:r
package org.rut.util.algorithm.support; lD'^6
mE;^B%v
import org.rut.util.algorithm.SortUtil; !u:Fn)j
7yJE+o'
/** l*(L"]
* @author treeroot BUdO:fr
* @since 2006-2-2 } @ [!%hE
* @version 1.0 AQtOTT$
*/ 2kOaKH[(q
public class HeapSort implements SortUtil.Sort{ belBdxa{"
LN)yQ-
/* (non-Javadoc) ~c55LlO>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~Y{]yBGoF
*/ Lr20xm
public void sort(int[] data) { 8QMMKOui\
MaxHeap h=new MaxHeap(); <Qr*!-Kc6
h.init(data); elR1NhB|p
for(int i=0;i h.remove(); R%~~'/2V
System.arraycopy(h.queue,1,data,0,data.length); #V)l>
} W9{;HGWS
=jA.INin4
private static class MaxHeap{ >0u*E *Y
Q"Exmn3p
void init(int[] data){ q,_EHPc
this.queue=new int[data.length+1]; g6xQQ,q=l
for(int i=0;i queue[++size]=data; 4=%,0.yt
fixUp(size); m<LzgX
} `gF]
} |9F-ZH~6
ZFh[xg'0
private int size=0; aK(e%Ed t"
9':Hh'
private int[] queue; S|;}]6p
Q);}1'c
public int get() { t|9vb
return queue[1]; \II^&xSF
} xSO5?eR"u
~[kI![
public void remove() { d|`8\fq
SortUtil.swap(queue,1,size--); <Fv7JPN%
fixDown(1); cp"{W-Q{$
} *3h_'3yo@
file://fixdown VZe'6?#
private void fixDown(int k) { _{ 2`sL)
int j; kyZZ0
while ((j = k << 1) <= size) { |MN2v[y
if (j < size %26amp;%26amp; queue[j] j++; qG2P?DR
if (queue[k]>queue[j]) file://不用交换 _,v>P2)
break; 9.,IqnP
SortUtil.swap(queue,j,k); 3g56[;Up?
k = j; KZ1m2R}'
} *v: .]_;
} 6ZwQ/~7H
private void fixUp(int k) { 8M,z#DF
while (k > 1) { bSQj=|h1
int j = k >> 1; DjiI*HLNR
if (queue[j]>queue[k]) il"pKQF
break; >)Bv>HM
SortUtil.swap(queue,j,k); t?b@l<,s
k = j; EP90E^v^
} $VP\Ac,!
} /Z~$`!J
EMxMJ=
} #)i+'L8
' QjJ^3A
} #s#BYbF
{$pi};
SortUtil： 4H@7t,>
naA8RD5/
package org.rut.util.algorithm; sO!m,pK(
|9BX ~`{
import org.rut.util.algorithm.support.BubbleSort; c>T)Rc
import org.rut.util.algorithm.support.HeapSort; LF)wn-C}
import org.rut.util.algorithm.support.ImprovedMergeSort; 0bD\`Jiv,
import org.rut.util.algorithm.support.ImprovedQuickSort; Au{b1n
import org.rut.util.algorithm.support.InsertSort; 90-s@a3B-j
import org.rut.util.algorithm.support.MergeSort; R:ecLbC
import org.rut.util.algorithm.support.QuickSort; knfmJUT
import org.rut.util.algorithm.support.SelectionSort; JV8*;n%}-
import org.rut.util.algorithm.support.ShellSort; g&Uu~;jq]
g $^Yv4
/** )cL`$h4DD
* @author treeroot 8A/rkoht*
* @since 2006-2-2 P)hGe3
* @version 1.0 91nB?8ZE6,
*/ yn20*ix{
public class SortUtil { *y` (^kyS
public final static int INSERT = 1; kw7E<aF!
public final static int BUBBLE = 2; U'~]^F%eyu
public final static int SELECTION = 3; m( %PZ*s
public final static int SHELL = 4; (/9erfuJ
public final static int QUICK = 5; J/,m'wH
public final static int IMPROVED_QUICK = 6; I>6zX
public final static int MERGE = 7; m;TekJXm
public final static int IMPROVED_MERGE = 8; W&[-QM8
public final static int HEAP = 9; 5{IbKj|
RSw;b.t7
public static void sort(int[] data) { 7osHKO<?2
sort(data, IMPROVED_QUICK); OHnsfXO_V
} glkH??S
private static String[] name={ 7j(gW
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 8wEJyAu2
}; PCa0I^d
K$s{e0 79
private static Sort[] impl=new Sort[]{ SLH;iqPT
new InsertSort(), 83aWMmA(1
new BubbleSort(), ^>eV}I5ak
new SelectionSort(), u6:$AA
new ShellSort(), {Q`Q2'@
new QuickSort(), W@%g_V}C*
new ImprovedQuickSort(), o3NB3@uj<
new MergeSort(), mtw{7E
new ImprovedMergeSort(), Df]*S
new HeapSort() oh9L2"
}; >7cDfv"
E}#&2n8Y
public static String toString(int algorithm){ KFaYn
return name[algorithm-1]; |@f\[v9`
} ICc:k%wE7
rZ.z!10
public static void sort(int[] data, int algorithm) { o,?h}@
impl[algorithm-1].sort(data); xK5~9StP
} 7xO~v23oe
)YZx]6\l)
public static interface Sort { ^ ]+vtk
public void sort(int[] data); wS >S\,LV
} [L ' >
6JRFYgI
public static void swap(int[] data, int i, int j) { ivt~S
int temp = data; q]s_hWWv
data = data[j]; t\v~ A0
data[j] = temp; *<h)q)HS
} ~~m(CJ4S
} =8"xQ>D62