[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; aD_7^8>
} Yw5-:w0f
int i1=l; wrXn|aV
int i2=mid+1; }_^ vvu
for(int cur=l;cur<=r;cur++){ I'p+9H$
if(i1==mid+1) }4h0{H
data[cur]=temp[i2++]; ;vX1U8
else if(i2>r) M}@>h
data[cur]=temp[i1++]; |k%1mE(+=s
else if(temp[i1] data[cur]=temp[i1++]; d\JBjT1g
else S'NLj(
data[cur]=temp[i2++]; ]IeLKcn
} :)tsz;
} V d]7v
|GsMLY:0
} Wv;,@xTZ
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改进后的归并排序: V7p hD3Y
IXR'JZ?fH
package org.rut.util.algorithm.support; 'RzO`-dr
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import org.rut.util.algorithm.SortUtil; bQwG"N
E'(nJ
/** BF;}9QebmS
* @author treeroot /;1O9HJa
* @since 2006-2-2 Hz==,NR-W
* @version 1.0 SBDGms
*/ |>m'szca4
public class ImprovedMergeSort implements SortUtil.Sort { 6KXW]a `
6-J}ZfGj
private static final int THRESHOLD = 10; !"Q%I#8uh
%.l={B,i
/* *vEj\
* (non-Javadoc) UX<-jY#'V
* NJ-Ji> w
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) J2! Q09 }5
*/ 9&`";dg
public void sort(int[] data) { >7~*j4g
int[] temp=new int[data.length]; cs9h\]ZA
mergeSort(data,temp,0,data.length-1); s8P3H|0.-
} hlze]d?z
5;^1Ab0
private void mergeSort(int[] data, int[] temp, int l, int r) { {&B_b|g*fW
int i, j, k; iF837ng5
int mid = (l + r) / 2; h{$k%YJ?
if (l == r) 6-)WXJ@V
return; TJZ~Rpq
if ((mid - l) >= THRESHOLD) rXE0jTf:a
mergeSort(data, temp, l, mid); <p/2hHfiD
else Md~._@`|K
insertSort(data, l, mid - l + 1); b09xf"D
if ((r - mid) > THRESHOLD) [{[m)Z^
mergeSort(data, temp, mid + 1, r); -qHG*v,
else 1@h8.ym<"
insertSort(data, mid + 1, r - mid); m.1-[2{8~
J:&.[
for (i = l; i <= mid; i++) { CYwV]lq:s
temp = data; vD?D]8.F~Q
} $e--"@[Y
for (j = 1; j <= r - mid; j++) { Gau@RX:O
temp[r - j + 1] = data[j + mid]; EJb+yy6
} q5z^y(Sv
int a = temp[l]; 4\*:Lc,-
int b = temp[r]; %Q &']
for (i = l, j = r, k = l; k <= r; k++) { F'|e:h
if (a < b) { nLG)>L
data[k] = temp[i++]; ``$$yS~d};
a = temp; j2u'5kJ G
} else { H>;,r,
data[k] = temp[j--]; G kG#+C0L
b = temp[j]; [6JDS;MIN
} 7 @}`1>97
} L%Rw]=v}v
} eB1NM<V
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/** \=im{(0h
* @param data Y&U-d{"
* @param l .35~+aqC
* @param i xE^G*<mj:
*/ vcp{Gf|^
private void insertSort(int[] data, int start, int len) { |)Dm.)/0)
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); !t"/w6X1I
} {#,5C H')
} 0a8\{(w
} h-;> v.
} <jF&+[*iT
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堆排序： -s`Wd4AP
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package org.rut.util.algorithm.support; ecJjE 56P
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import org.rut.util.algorithm.SortUtil; CrL9|78
'/9j"mIA9$
/** U:n~S
* @author treeroot CLVT5pj='
* @since 2006-2-2 gT$WG$^i
* @version 1.0 FK~wr;[
*/ b|DU
public class HeapSort implements SortUtil.Sort{ qK#"uU8B
zF[Xem
/* (non-Javadoc) eF.nNu
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $hcv}<$/
*/ :f39)g5>
public void sort(int[] data) { 6'/Zq
MaxHeap h=new MaxHeap(); )$9wKk\F
h.init(data); .d^8?vo
for(int i=0;i h.remove(); 0=6mb]VUi=
System.arraycopy(h.queue,1,data,0,data.length); ,\P|%yv
} "U4c'iW
eaDZ^Z Er
private static class MaxHeap{ MZ-;'w&Z
y] D\i5Xv
void init(int[] data){ wzwv>@}
this.queue=new int[data.length+1]; 8w:mL^6x
for(int i=0;i queue[++size]=data; SH=S>
fixUp(size); cyB+(jLHDs
} JkT!X
} 85Yi2+8f4
H7&y79mB
private int size=0; .*njgAq7
`Kf@<=
private int[] queue; ^" g?m
&`n:AR`
public int get() { z8}QXXa
return queue[1]; .$x}~Sw
} 9v*y&V9/
<5pNFj}0;X
public void remove() { Tr:@Dv.O
SortUtil.swap(queue,1,size--); *v K~t|z
fixDown(1); a BMV6'
} S$fS|N3]%
file://fixdown e4Y+u8gT
private void fixDown(int k) { =UK:83R(
int j; R--s u:
while ((j = k << 1) <= size) { 2SD Z
if (j < size %26amp;%26amp; queue[j] j++; &R4?]I
if (queue[k]>queue[j]) file://不用交换 (n?f016*%d
break; !9$}1_,is
SortUtil.swap(queue,j,k); db_?da;!`
k = j; HP[B%
} {-me;ayk
} O4oN)
private void fixUp(int k) { 'R+^+urq^
while (k > 1) { 4To$!=
int j = k >> 1; e\[q3J
if (queue[j]>queue[k]) 0R\.G1f%
break; 2INpo
SortUtil.swap(queue,j,k); OQ_<Vxz
k = j; W?4:sLC#3
} 2(3Q#3V
} YB7A5
f~P YK
} Khi6z&B
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} ZZ^A&%E(a
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SortUtil： oz{X"jfu
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package org.rut.util.algorithm; W[)HFh(#
7ixG{yu
import org.rut.util.algorithm.support.BubbleSort; kDmuj>D
import org.rut.util.algorithm.support.HeapSort; 0Q7<;'m
import org.rut.util.algorithm.support.ImprovedMergeSort; }[PwA[k'
import org.rut.util.algorithm.support.ImprovedQuickSort; F3!@|/<w
import org.rut.util.algorithm.support.InsertSort; #BBDI
import org.rut.util.algorithm.support.MergeSort; &0Y |pY
import org.rut.util.algorithm.support.QuickSort; a-,*iK{_u
import org.rut.util.algorithm.support.SelectionSort; @"fv[=Xb
import org.rut.util.algorithm.support.ShellSort; !=.y[Db=
JC~sz^>p\
/** !]uB4
* @author treeroot _^b\#Jz4U3
* @since 2006-2-2 ]O:8o<0
* @version 1.0 t-C|x)J+
*/ zsQkI@)sO
public class SortUtil { r-EIoZ"P
public final static int INSERT = 1; LXby(|<j
public final static int BUBBLE = 2; L9Zz-Dr s
public final static int SELECTION = 3; Gd\/n*j
public final static int SHELL = 4; db1ZNw
public final static int QUICK = 5; l 7dm@S
public final static int IMPROVED_QUICK = 6; DpmAB.
public final static int MERGE = 7; oO?+2pTQV
public final static int IMPROVED_MERGE = 8; Q!IqvmO
public final static int HEAP = 9; lW#2ox
Y9#dAI[Gce
public static void sort(int[] data) { 1:T"jsWw
sort(data, IMPROVED_QUICK); RE4#a2
} RF2I_4
private static String[] name={ ) aMiT
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Fng
}; S#p_Y^A
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private static Sort[] impl=new Sort[]{ 5D7 L)>
new InsertSort(), x@oxIXN
new BubbleSort(), 7#UJ444b~
new SelectionSort(), C "@>NC_
new ShellSort(), V!]|u ^4I
new QuickSort(), xE--)=<$
new ImprovedQuickSort(), KV;q}EyG
new MergeSort(), _IU5HT}2
new ImprovedMergeSort(), 6j{ynt
new HeapSort() *zweZG8:
}; K-Pcew^?
.c<U5/
public static String toString(int algorithm){ M8Bp-_
return name[algorithm-1]; "\;n t5L
} Xqm?@JN
rBL2A
public static void sort(int[] data, int algorithm) { kP('X/
impl[algorithm-1].sort(data); M+ <SSi"
} ^5~x*=_
FYC]^D
public static interface Sort { E3S0u7Es
public void sort(int[] data); snkMxc6c[
} s@%>
SbL7e#!!
public static void swap(int[] data, int i, int j) { X04LAYY_u
int temp = data; A-myY30
data = data[j]; aG =6(ec.
data[j] = temp; "Zn nb*pOM
} h|'|n/F
} _M7|:*