[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; T^~9'KDd
} cXo^.u
int i1=l; 'fkaeFzOl
int i2=mid+1; ?Ok@1
for(int cur=l;cur<=r;cur++){ r(::3TF%#q
if(i1==mid+1) XTOZ]H*^
data[cur]=temp[i2++]; ST[+k
else if(i2>r) Hz6yy*
data[cur]=temp[i1++]; Cq-#|+zr
else if(temp[i1] data[cur]=temp[i1++]; /K@{(=n
else 1KtPq,
data[cur]=temp[i2++]; tuiQk=[c
} XgmblNp1
} "Nn+Zw43
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} 8xEOR!\!`k
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改进后的归并排序: ef;Ta|#
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package org.rut.util.algorithm.support; MN22#G4j^w
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import org.rut.util.algorithm.SortUtil; V^U1o[`
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/** !dW77kLTg
* @author treeroot n*oa J<o%
* @since 2006-2-2 F}lgy;=h
* @version 1.0 qWzzUM1=
*/ (cj3[qq
public class ImprovedMergeSort implements SortUtil.Sort { _>moza
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private static final int THRESHOLD = 10; g#ZuRL
~',}]_'oR-
/* h!*++Y?&0
* (non-Javadoc) Gkr^uXNg#
* B~u_zZE
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) f~.w2Cna
*/ 4#qjRmt
public void sort(int[] data) { Z-{!Z;T)z
int[] temp=new int[data.length]; 'ZHu=UT7_
mergeSort(data,temp,0,data.length-1); A!kNqJ2
} Qw$"W/&X
0)8QOTeT
private void mergeSort(int[] data, int[] temp, int l, int r) { >q&Q4E0
int i, j, k; #&1Y!kbdd
int mid = (l + r) / 2; @HfWAFT
if (l == r) {tE/Jv $
return; c#G]3vTdE
if ((mid - l) >= THRESHOLD) .'SXRrn&:C
mergeSort(data, temp, l, mid); T2wn!N?r
else P#H#@:/3
insertSort(data, l, mid - l + 1); FGOa!G
if ((r - mid) > THRESHOLD) L-d8bA
mergeSort(data, temp, mid + 1, r); _^RN C)ol
else H&L=WF+x
insertSort(data, mid + 1, r - mid); V=|^r?
lO9{S=N
for (i = l; i <= mid; i++) { j8os6I
temp = data; k~Pm.@,3o
} t.pg;#
for (j = 1; j <= r - mid; j++) { )).;p_nLZ
temp[r - j + 1] = data[j + mid]; oQDOwM,
} Et'C4od s
int a = temp[l]; (Df<QC`0v
int b = temp[r]; |Z;wk&
for (i = l, j = r, k = l; k <= r; k++) { ,l<-*yMD
if (a < b) { {I 7pk6Qd
data[k] = temp[i++]; .bl0w"c^qq
a = temp; Z"?AaD[
} else { J'O`3!Oy/
data[k] = temp[j--]; V8&/O)}o
b = temp[j]; V8Q#%#)FHe
} "|DR"rr'j
} fnnwe2aso
} _3p:q.
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/** 5 J|;RtcR
* @param data N0RFPEQ~
* @param l \ b9,>
* @param i 8 (^2
*/ ga^<_;5<
private void insertSort(int[] data, int start, int len) { )+t5G>yKK
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); .%wEuqW=0
} G^mk<pH
} SbnVU[
} !v;r3*#Nky
} 4_.k Q"'DH
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堆排序： h/TPd]
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package org.rut.util.algorithm.support; 3`9*Hoy0c
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import org.rut.util.algorithm.SortUtil; NuO>zAu
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/** F[=m|MZb
* @author treeroot $g$`fR)
* @since 2006-2-2 8e\v5K9
* @version 1.0 Y|VzeJC
*/ : m5u=:t
public class HeapSort implements SortUtil.Sort{ ONjc},_
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/* (non-Javadoc) NUnP'X=J,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) oNU* q.Q
*/ CLkVe
public void sort(int[] data) { Zj7XmkL
MaxHeap h=new MaxHeap(); 4P~<_]yf
h.init(data); YqJIp. Z
for(int i=0;i h.remove(); )(L&+DDy
System.arraycopy(h.queue,1,data,0,data.length); QNJG}Upl
} D1Sl+NOV
UUU^YT \
private static class MaxHeap{ |Gf{}
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void init(int[] data){ }[DAk~
this.queue=new int[data.length+1]; (KQt%]
for(int i=0;i queue[++size]=data; oPbD9
fixUp(size); >@L HJ61C
} 8Cqs@<r4Od
} l46F3C|
zc1Zuco| R
private int size=0; f!J^vDl
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private int[] queue; H\k5B_3OU
VxFy[rP
public int get() { \Cs<'(=
return queue[1]; lX4p'R-h
} @ tIB'|O
(>K$gAQH
public void remove() { !:t9{z{Ixg
SortUtil.swap(queue,1,size--); _)l %-*Z7p
fixDown(1); .;:xx~G_Q
} 7asq]Y}<
file://fixdown :z\f.+MI
private void fixDown(int k) { #~x5}8
int j; _5T7A><q<
while ((j = k << 1) <= size) { cMl%)j-
if (j < size %26amp;%26amp; queue[j] j++; qj6`nbZ{va
if (queue[k]>queue[j]) file://不用交换 ]p!J]YV ]0
break; ,2TqzU;
SortUtil.swap(queue,j,k); Ds87#/Yfv
k = j; S0+zq<
} #I?iR3u
} i-?zwVmn
private void fixUp(int k) { ~qS/90,
while (k > 1) { T,uIA]
int j = k >> 1; PBL^xlg
if (queue[j]>queue[k]) c2^7"`
break; )!d1<p3
SortUtil.swap(queue,j,k); WO-WoPO
k = j; q&E5[/VK:
} 5gD)2Q6
} f4S@lyYF
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} 2]9<%-=S
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} l,u{:JC
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SortUtil： i8YgG0[)
zt2-w/[Q
package org.rut.util.algorithm; WdqK/s<jM
qm=F6*@}
import org.rut.util.algorithm.support.BubbleSort; -^H5z+"^
import org.rut.util.algorithm.support.HeapSort; 6\Vu#r
import org.rut.util.algorithm.support.ImprovedMergeSort; WWcm(q=
import org.rut.util.algorithm.support.ImprovedQuickSort; ZYe\"|x,s
import org.rut.util.algorithm.support.InsertSort; 9yo[T(8
import org.rut.util.algorithm.support.MergeSort; sGls^J)
import org.rut.util.algorithm.support.QuickSort; gVU\^KN]
import org.rut.util.algorithm.support.SelectionSort; wmE,k1G
import org.rut.util.algorithm.support.ShellSort; `_U0>Bfg;
d:pm|C|F
/** .eNwC.8i
* @author treeroot !otq X-
* @since 2006-2-2 6r=)V$K<
* @version 1.0 'uACoME@
*/ DG*o w^
public class SortUtil { Vfm #UvA
public final static int INSERT = 1; Qz)8eIO:
public final static int BUBBLE = 2; Q(5:~**I
public final static int SELECTION = 3; jfPJ5]Z
public final static int SHELL = 4; &IEBZB\/+&
public final static int QUICK = 5; G\N"rG=
public final static int IMPROVED_QUICK = 6; T0v@mXBQ
public final static int MERGE = 7; B"8JFf}"q
public final static int IMPROVED_MERGE = 8; dU>R<jl!$
public final static int HEAP = 9; FP9<E93br
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public static void sort(int[] data) { JJ9e{~0I
sort(data, IMPROVED_QUICK); O;BMwg_7
} <<On*#80w
private static String[] name={ /W$y"!^)J1
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" [{p?BTs
}; iC|6roO!jk
]7S7CVDk4
private static Sort[] impl=new Sort[]{ O4d^ig-xaH
new InsertSort(), Pv %vx U
new BubbleSort(), }Q r0T
new SelectionSort(), @z$pPo0fW
new ShellSort(), %Di7u- x
new QuickSort(), y)^CDe2xU
new ImprovedQuickSort(), F `pyhc>1;
new MergeSort(), S,Wl)\
new ImprovedMergeSort(), qe6C|W~n
new HeapSort() 9Ajgfy>
}; w[YkTv
?9zoQ[
public static String toString(int algorithm){ Z!RRe]"y
return name[algorithm-1]; +ersP@G
} !/Bw,y ri<
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public static void sort(int[] data, int algorithm) { U8QR*"GmT
impl[algorithm-1].sort(data); z)W#&JFF
} @[>+Dzn[6
iZ.&q 6
public static interface Sort { }OP%p/eY
public void sort(int[] data); }lC64;yo
} zN)|g
+1+A3
public static void swap(int[] data, int i, int j) { ndKvJH4
int temp = data; <^*+8{*
data = data[j]; Bgk~R.l
data[j] = temp; =Y]'5cn{
} N}}PlGp$
} TM/|K|_