[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; IIyI=WlpG
} <I"S#M7-s
int i1=l; a@R]X5[O
int i2=mid+1; xZV1k~C
for(int cur=l;cur<=r;cur++){ VU@9@%TN
if(i1==mid+1) P\_`
data[cur]=temp[i2++]; t:fFU1x
else if(i2>r) Q?X>E3=U
data[cur]=temp[i1++]; +T8B:
else if(temp[i1] data[cur]=temp[i1++]; uw2hMt (N
else xpOg8u5
data[cur]=temp[i2++]; }K3x
} >a}f{\Q
} <vwkjCA`
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} ~,*b }O
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改进后的归并排序: `:axzCrCfR
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package org.rut.util.algorithm.support; 2+X\}s1vN
*E{2J:`
import org.rut.util.algorithm.SortUtil; GQ |Mr{.;
t#2(j1
/** XU"~h64]
* @author treeroot {GJ@psG*
* @since 2006-2-2 k?'B*L_Mzv
* @version 1.0 i'\T R|qd
*/ u7=U^}#
public class ImprovedMergeSort implements SortUtil.Sort { DY^;EZ!hb
AFAAuFE"
private static final int THRESHOLD = 10; QV\eMuNy
` Jdb;
/* a1@Y3MQ;i
* (non-Javadoc) ooQQ-?"m
* NC38fiH_N
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0'IBN}
*/ 73){K?R
public void sort(int[] data) { v;)..X30
int[] temp=new int[data.length]; @9"J|}
mergeSort(data,temp,0,data.length-1); y:6; LZ9[
} f!JS= N?3
+>PX&F
private void mergeSort(int[] data, int[] temp, int l, int r) { 6:~v4W!k
int i, j, k; #B\"'8#
int mid = (l + r) / 2; AA7C$;Z15~
if (l == r) pa#IJ
return; ,{mCf^
if ((mid - l) >= THRESHOLD) ow]053:i
mergeSort(data, temp, l, mid); [1u-Q%?#
else Gn&4V}F
insertSort(data, l, mid - l + 1); !@v7Zu43,
if ((r - mid) > THRESHOLD) @mfEKU!
mergeSort(data, temp, mid + 1, r); ^f(@gS}?
else eow'K 821A
insertSort(data, mid + 1, r - mid); )vSRHE
5D'\b}*lJ}
for (i = l; i <= mid; i++) { [W7CXZDd
temp = data; d m`E!R_
} :eCU/BC4
for (j = 1; j <= r - mid; j++) { y~\oTJb
temp[r - j + 1] = data[j + mid]; .p(T^ m2A*
} is-7 j7;
int a = temp[l]; *I0T{~
int b = temp[r]; y_?Me]
for (i = l, j = r, k = l; k <= r; k++) { z5YWt*nm
if (a < b) { -jiG7OL
data[k] = temp[i++]; OtNd,U.dE
a = temp; 1 9CK+;b
} else { H/37)&$E(
data[k] = temp[j--]; J_4!2v!6e
b = temp[j]; [D4Es
} >j QWn@
} J7g8D{4
} \QCJ4}\CS
.yEBOMNZ
/** 7yh/BZ1
* @param data aSnFKB
* @param l eYvWZJa4
* @param i @ rc{SB
*/ %B.yW`,X
private void insertSort(int[] data, int start, int len) { %xyou:~0zs
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); K9up:.{QQ
} N=7pK&NHSG
} k-^mIJo}
} 5f 5f0|ok
} 6g)GY"49
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堆排序： V]db'qB\
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package org.rut.util.algorithm.support; 2V#>)R#k
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import org.rut.util.algorithm.SortUtil; Ob<{G"
:Nz2z[W$
/** =7m)sxj]w
* @author treeroot Xx>X5Fy
* @since 2006-2-2 V: TM]
* @version 1.0 L bmawi^
*/ JVSA&c%3
public class HeapSort implements SortUtil.Sort{ 7x%R:^*4
LHo3 Niy.
/* (non-Javadoc) g0["^P1tV
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :BV6y|J9O^
*/ B e0ND2oo
public void sort(int[] data) { [UWdW
MaxHeap h=new MaxHeap(); 9j6QX~,
h.init(data); )O@]uY
for(int i=0;i h.remove(); |}di&y@-JI
System.arraycopy(h.queue,1,data,0,data.length); MjC_ (cs
} z)r=+ -
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private static class MaxHeap{ /~$WUAh
1`qMj0Y_
void init(int[] data){ IvtJ0
this.queue=new int[data.length+1]; _v> }_S
for(int i=0;i queue[++size]=data; '|8} z4/g
fixUp(size); GE%Z9#E
} P 'od`
} ud'-;W
"4{LN}`
private int size=0; ^Dn D>h@q
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private int[] queue; [R^iF
(Fhs"
public int get() { WGZ9B^A
return queue[1]; jYmR
} n|RJ;d30Q
sl`s_$J
public void remove() { ~ls[Sl@
SortUtil.swap(queue,1,size--); g'n7T|h ~
fixDown(1); Sp;G'*g
} Vg>dI&O
file://fixdown ic#`N0s?
private void fixDown(int k) { VKG&Y_7N
int j; 8h*Icf
while ((j = k << 1) <= size) { 'R'*kxf
if (j < size %26amp;%26amp; queue[j] j++; ($;77fPR
if (queue[k]>queue[j]) file://不用交换 %,@e^3B
break; zkuU5O
SortUtil.swap(queue,j,k); deV 8
k = j; ?kH8Lw~{5W
} Z8@J`0x
} xRzFlay8
private void fixUp(int k) { 1q:2\d]
while (k > 1) { 7'W%blg!V
int j = k >> 1; {byBcG
if (queue[j]>queue[k]) g+Sbl
break; <oT^A|JFj
SortUtil.swap(queue,j,k); %^4CSh
k = j; ~-_kM
} J\:R|KaP<p
} QSdHm
%InA+5s`
} Ybs\ES'?A
4~Vx3gEV:
} .ps-4eXF
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SortUtil： 7XTkX"zKj
8hOk{xs8
package org.rut.util.algorithm; t(NI-UXBp
g(qJN<RC/
import org.rut.util.algorithm.support.BubbleSort; jHE}qE~>5
import org.rut.util.algorithm.support.HeapSort; S >X:ZYYC
import org.rut.util.algorithm.support.ImprovedMergeSort; =S+wCN
import org.rut.util.algorithm.support.ImprovedQuickSort; e.7EU
import org.rut.util.algorithm.support.InsertSort; IEsEdw]aZE
import org.rut.util.algorithm.support.MergeSort; M/>7pZW
import org.rut.util.algorithm.support.QuickSort; hKLCJ#T
import org.rut.util.algorithm.support.SelectionSort; |,gc_G
import org.rut.util.algorithm.support.ShellSort; 2Mc3|T4)U
1PQ~jfGi
/** nYR#
* @author treeroot Wz49i9e+d
* @since 2006-2-2 [q)8N
* @version 1.0 Ln')QN
*/ Ui_8)z _
public class SortUtil { |ef7bKU8
public final static int INSERT = 1; eTI%^d|
public final static int BUBBLE = 2; [!HEQ8 2g
public final static int SELECTION = 3; "GMBjT8
public final static int SHELL = 4; P;=n9hgHI
public final static int QUICK = 5; B}Z63|/N
public final static int IMPROVED_QUICK = 6; MDhRR*CBh
public final static int MERGE = 7; Wuc S:8#|
public final static int IMPROVED_MERGE = 8; ZM!CaR
public final static int HEAP = 9; 9kN}c<o
X0bN3N
public static void sort(int[] data) { LtWP0@JA
sort(data, IMPROVED_QUICK); S;3R S;
} /YP{,#p
private static String[] name={ sJ;g$TB
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" vj'wm}/
}; : UGZ+
Bu<M\w?7Y
private static Sort[] impl=new Sort[]{ ;4R$g5-4X
new InsertSort(), ;f0I 8i,JN
new BubbleSort(), "pi=$/RD9
new SelectionSort(), ]HKQDc'
new ShellSort(), c}Ft^Il
new QuickSort(), OE_XCZ!5P
new ImprovedQuickSort(), S!jTyY7e
new MergeSort(), [')m|u~FS4
new ImprovedMergeSort(), "CSsCA$/
new HeapSort() A-Sv;/yD_
}; L[oui,}_
jaTh^L
public static String toString(int algorithm){ 3oGt3F{gZ
return name[algorithm-1]; 'y;EhOwj,
} gf#{k2r
BgurzS4-
public static void sort(int[] data, int algorithm) { dA@]!
impl[algorithm-1].sort(data); gp};D
} 8;b(0^
@Lpq~ 1eZB
public static interface Sort { \\PjKAsh
public void sort(int[] data); Qi,j+xBp
} [w>$QR
iV5yJF{ZH
public static void swap(int[] data, int i, int j) { s:>VaGC
int temp = data; B6u/mo<
data = data[j]; 1->dMm}G[
data[j] = temp; ,X[ktz
} !O+)sbd<
} "cE7 5