[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; )C[8#Q-:
} ]Az >W*Y
int i1=l; yI)2:Ca*
int i2=mid+1; Y9N:%[ :>W
for(int cur=l;cur<=r;cur++){ ak zb<aT
if(i1==mid+1) H{8\<E:V+}
data[cur]=temp[i2++]; -oj@ c OZ
else if(i2>r) p|%)uA3'/
data[cur]=temp[i1++]; JT+P>\\];'
else if(temp[i1] data[cur]=temp[i1++]; /+iaw~={"
else 5ym =2U
data[cur]=temp[i2++]; UT-=5
} =0Mmxd&o=M
} %Vq@WF
:BS`Q/<w
} 7@\iBmr6
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改进后的归并排序: \;]~K6=
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package org.rut.util.algorithm.support; PuWF:'w r
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import org.rut.util.algorithm.SortUtil; @4pN4v8U
.Kx5Kh{
/** 0(n/hJ
* @author treeroot btOC\bUMfD
* @since 2006-2-2 N^)OlH
* @version 1.0 YeQX13C"Z
*/ &^Io\
public class ImprovedMergeSort implements SortUtil.Sort { t0Uax-E(
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private static final int THRESHOLD = 10; 4D8q Gti
f`Nu]#i
/* 8miIlB
* (non-Javadoc) +q1@,LxN
* J<2N~$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]du pU"VV
*/ E?V:dr
public void sort(int[] data) { "(5M }5D
int[] temp=new int[data.length]; iMSS8J
mergeSort(data,temp,0,data.length-1); F[lHG,g-
} d%<Uh(+:
g)zy^aDf
private void mergeSort(int[] data, int[] temp, int l, int r) { WVVqH_
int i, j, k; X- zg
int mid = (l + r) / 2; 0F"xU1z,
if (l == r) MDRSI g
return; B=f{`rM)~W
if ((mid - l) >= THRESHOLD) yuND0,e
mergeSort(data, temp, l, mid); qVf~\H@
else rl4-nA
insertSort(data, l, mid - l + 1); _z_uz\#,
if ((r - mid) > THRESHOLD) !cfn%+0
mergeSort(data, temp, mid + 1, r); n[<Vj1n
else {d)+a$qj
insertSort(data, mid + 1, r - mid); {2,V3*NF
h' 16"j>
for (i = l; i <= mid; i++) { >y1/*)O9~
temp = data; QDU^yVa_
} 7%X$6N-X
for (j = 1; j <= r - mid; j++) { #/n\C
temp[r - j + 1] = data[j + mid]; |XQ!xFB
} '1d-N[
int a = temp[l]; A2xORG&FD
int b = temp[r]; 18Ty)7r'
for (i = l, j = r, k = l; k <= r; k++) { $ _ gMJ\{
if (a < b) { @r#>-p
data[k] = temp[i++]; Ih.o;8PpK
a = temp; aFLm,
} else { %;gD_H4mm
data[k] = temp[j--]; R\iU)QP
b = temp[j]; U!('`TYe
} 2rA`y8g(L
} h4V.$e<T&
} c|E
k1X<jC]P
/** )+{'p0
* @param data A w83@U
* @param l L|v1=qNH4
* @param i En1pz\'
*/ xX}vxhN
private void insertSort(int[] data, int start, int len) { IKpNc+;p
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 67d0JQTu
} -E.EI@"
} AE@*#47
} F$)Ki(mq
} t.NG]ejZ
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堆排序： #bnFR
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package org.rut.util.algorithm.support; tvI~?\Ylj
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import org.rut.util.algorithm.SortUtil; Hq=RtW2
4rv3D@E
/** Ix"uk6 h
* @author treeroot i2EB.Zlv
* @since 2006-2-2 o#G7gzw)
* @version 1.0 .x}ImI
*/ Dk:Zeo]+my
public class HeapSort implements SortUtil.Sort{ F`'e/
B6,"S5@
/* (non-Javadoc) 9v^MZ^Y{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) dw'%1g.113
*/ >hHn{3y
public void sort(int[] data) { 2OEOb,`
MaxHeap h=new MaxHeap(); #qHo+M$"
h.init(data); O GSJR`yT
for(int i=0;i h.remove(); RzXxnx)]q
System.arraycopy(h.queue,1,data,0,data.length); R:=i/P/
} X)`?P*[
y!!p:3
private static class MaxHeap{ Aj-}G^>#
W*gu*H^s~
void init(int[] data){ [&6l=a
this.queue=new int[data.length+1]; oMcX{v^"
for(int i=0;i queue[++size]=data; +,If|5>(
fixUp(size); }56"4/ Z
} f:e~ystm
} !qT.D:!@zF
H+F'K XP*K
private int size=0; haS`V
s(F^P
private int[] queue; a(!:a+9WOP
A:>G:X5t
public int get() { jPhOk>m
return queue[1]; SI U"cO4
} (m})V0/`
3. fIp5g
public void remove() { om|M=/^
SortUtil.swap(queue,1,size--); yjc:+Y{5'
fixDown(1); ^qGH77#z
} #|)GarDG
file://fixdown B$aboL2
private void fixDown(int k) { (',G Ako
int j; ;DBO
while ((j = k << 1) <= size) { {}[S,L
if (j < size %26amp;%26amp; queue[j] j++; .F&\xa{
if (queue[k]>queue[j]) file://不用交换 H"6:!;9,
break; p\~ lPXK
SortUtil.swap(queue,j,k); h$y1"!N(
k = j; (:-=XR9A`
} yin"+&<T
} }B^KV#_{S
private void fixUp(int k) { L9&Z?$6J_p
while (k > 1) { D:M0_4S
int j = k >> 1; >i-cR4=LL{
if (queue[j]>queue[k]) =DUsQN!
break; %mg |kb6n
SortUtil.swap(queue,j,k); ZI-)'
k = j; JuKj
} 9-I;'
} P*Uu)mG)G
|&o%c/
} {])F%Q_#cD
mq do@
} tNoo3&
/EA4-#uw
SortUtil： =&< s*-l[
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package org.rut.util.algorithm; jI[:`
B/&axm%0
import org.rut.util.algorithm.support.BubbleSort; +UB+. 5P
import org.rut.util.algorithm.support.HeapSort; +(QGlRd
import org.rut.util.algorithm.support.ImprovedMergeSort; -%NT)o
import org.rut.util.algorithm.support.ImprovedQuickSort; A7 E*w
import org.rut.util.algorithm.support.InsertSort; P10`X&
import org.rut.util.algorithm.support.MergeSort; }2-{4JIq}
import org.rut.util.algorithm.support.QuickSort; 2>_6b>9]
import org.rut.util.algorithm.support.SelectionSort; 7JQ5OC3
import org.rut.util.algorithm.support.ShellSort; UXnd~DA
;N6L`|
/** Y6,< j|
* @author treeroot p(:\)HP)R
* @since 2006-2-2 8(\Az5%
* @version 1.0 [89#8|+
*/ rX)PN3TD
public class SortUtil { :DCj2"
public final static int INSERT = 1; pTX{j=n!
public final static int BUBBLE = 2; /|bir6Y:
public final static int SELECTION = 3; "n=`{~F
public final static int SHELL = 4; xzbyar<
public final static int QUICK = 5; OIe {Sx{y
public final static int IMPROVED_QUICK = 6; |JtdCP{
public final static int MERGE = 7; FU E/uh
public final static int IMPROVED_MERGE = 8; OXK?R\ E+
public final static int HEAP = 9; ubjuuha"
H*?U@>UU
public static void sort(int[] data) { RgZBh04q
sort(data, IMPROVED_QUICK); dyC: Mko=
} EL;IrtU
private static String[] name={ w$u=_
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" dc|"34;^"
}; T4F}MVK
JnlM0jc]`
private static Sort[] impl=new Sort[]{ &>ii2% 4
new InsertSort(), !LVWggk1
new BubbleSort(), 2kp.Ljt@
new SelectionSort(), kVCSFF*
new ShellSort(), |[)t4A"}
new QuickSort(), =hH>]$J[
new ImprovedQuickSort(), kS%FV;9>(
new MergeSort(), I QS|
new ImprovedMergeSort(), lc,{0$ 1<
new HeapSort() ={o>g'
}; s=! y%
'p80X^g
public static String toString(int algorithm){ qH: ` O%,
return name[algorithm-1]; \f}S Hh
} &HNJ'
wWKC.N
public static void sort(int[] data, int algorithm) { }5z6b>EI9a
impl[algorithm-1].sort(data); - /]ro8V$
} nw+L _b
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public static interface Sort { 47ppyh6@
public void sort(int[] data); 0m(/hK
} rUvqAfE&+
. p^='Kz?
public static void swap(int[] data, int i, int j) { I3uaEv7OZc
int temp = data; gLa#y
data = data[j]; d+[yW7%J
data[j] = temp; Cg?D<l4
} Cg |_) _w
} Oz#$x