[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; aJ$({ZN\#
} jF0>wm
int i1=l; gE~LPwM
int i2=mid+1; ow K)]t
for(int cur=l;cur<=r;cur++){ ({WV<T&
if(i1==mid+1) 4~z-&>%
data[cur]=temp[i2++]; 6l&,!fd
else if(i2>r) (A\\s$fE/1
data[cur]=temp[i1++]; L_R(K89w
else if(temp[i1] data[cur]=temp[i1++]; Z6IWQo,)Rh
else DN;3VT.-
data[cur]=temp[i2++]; z?'z{+HY
} V&J'2Lq
} i^"!"&tW#
..UA*#%1
} I)q"M]~
L=V.@?
改进后的归并排序: WXe]Q bg
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package org.rut.util.algorithm.support; &ZI-#(P
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import org.rut.util.algorithm.SortUtil; |?4NlB6
"WzD+<oL
/** ?OVje9
* @author treeroot Gm-V/[29R
* @since 2006-2-2 o8u;2gZx
* @version 1.0 X \qG WpN%
*/ aBWA hn
public class ImprovedMergeSort implements SortUtil.Sort { 4XIc|a Aa
<j:@ iP
private static final int THRESHOLD = 10; Z^_gS&nDa~
[Lq9lw&
/* ;={3H_{3
* (non-Javadoc) QfRo`l/V9
* 63Z^ k(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) uFn?U)
*/ /^=8?wK
public void sort(int[] data) { t_jnp $1m
int[] temp=new int[data.length]; Ar'k6NX
mergeSort(data,temp,0,data.length-1); nt$q< 57
} !uqp?L^;
arN=OB
private void mergeSort(int[] data, int[] temp, int l, int r) { % !Ih=DZ
int i, j, k; w[OUGn'
int mid = (l + r) / 2; R$i-%3
if (l == r) )8;At'q}
return; ~9n30j%]s
if ((mid - l) >= THRESHOLD) N."x@mV
mergeSort(data, temp, l, mid); d8K|uEHVz
else .:~E.b
insertSort(data, l, mid - l + 1); z"f+;1
if ((r - mid) > THRESHOLD) vF1Fcp.@
mergeSort(data, temp, mid + 1, r); w$"^)EG,7
else ]Wtg.y6;
insertSort(data, mid + 1, r - mid); d:=Z<Y?d/
ew<_2Xy"<
for (i = l; i <= mid; i++) { cc0Tb
temp = data; oqbhb1D1<
} >35W{d
for (j = 1; j <= r - mid; j++) { H`1q8}m
temp[r - j + 1] = data[j + mid]; =:'\wx X
} k{D0&
int a = temp[l]; 5}Z>N,4
int b = temp[r]; wU|jw(
for (i = l, j = r, k = l; k <= r; k++) { n0g8B
if (a < b) { 0X5b32
data[k] = temp[i++]; /h8100
a = temp; DMlr%)@{
} else { zxkO&DGRbN
data[k] = temp[j--]; ~I;|ipK4m
b = temp[j]; |G_,1$
} l2ie\4dK@
} k~)@D| ?
} jXPbj.
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/** TG%w
* @param data |5jrl|
* @param l Up0kTL
* @param i i6<uj
*/ j8c5_&
private void insertSort(int[] data, int start, int len) { }{)Rnb@ >
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); nDyA][
} 6j95>}@
} #4<=Ira5
} !*S,S{T8
} snYeo?|b
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堆排序： 0#4A0[vV
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package org.rut.util.algorithm.support; 2_}oOt?qiM
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import org.rut.util.algorithm.SortUtil; >>|47ps3
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/** YQb503W"d~
* @author treeroot rdCs
* @since 2006-2-2 >Y(JC#M;
* @version 1.0 6|IJwP^Q_
*/ EP^qj j@M
public class HeapSort implements SortUtil.Sort{ -[}Aka,f!
d0R;|p''Z
/* (non-Javadoc) (,KzyR=*'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) e?FQ6?
*/ S|af?IW
public void sort(int[] data) { 5zh6l+S[
MaxHeap h=new MaxHeap(); +s^nT{B@\
h.init(data); a~?B/ g&_
for(int i=0;i h.remove(); _]-8gr-T
System.arraycopy(h.queue,1,data,0,data.length); U({N'y=
} X}Om)WCr
n.t5:SW
private static class MaxHeap{ ;M~9Yr=1
Y>atJ
void init(int[] data){ <@[;IX`YN
this.queue=new int[data.length+1]; (V1;`sI8
for(int i=0;i queue[++size]=data; w 62m}5eA
fixUp(size); [XttT
} (H"{r
} q*94vo-
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private int size=0; "?<(-,T
/GX>L)
private int[] queue; ^4NRmlb
.)=*Yr M
public int get() { 9yaTDxB>
return queue[1]; TQb@szp:|
} EIfqRRTA
]#W7-Q;]
public void remove() { /q}(KJX
SortUtil.swap(queue,1,size--); /nsBUM[;
fixDown(1); HDTA`h?t;
} hnH<m7
file://fixdown }a#T\6rY
private void fixDown(int k) { ||fw!8E
int j; yYSmmgrX0
while ((j = k << 1) <= size) { Ghc U~
if (j < size %26amp;%26amp; queue[j] j++; %?, 7!|Ls
if (queue[k]>queue[j]) file://不用交换 #d*0 )w
break; \o=9WKc
SortUtil.swap(queue,j,k); q*5L",
k = j; DBG0)=SHy
} LT>_Y`5>
} hW'b'x<
private void fixUp(int k) { ''D7Bat@
while (k > 1) { ."gq[0_YS
int j = k >> 1; j}d):3!
if (queue[j]>queue[k]) mZc;n.$U
break; wEwRW
SortUtil.swap(queue,j,k); $${3I4
k = j; dQ~GE}[
} 'wtb"0 }
} K F_Uu
x;`Gn_
} )+|wrK:*v
=+b>d\7xG
} S>r}3,]S
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SortUtil： pUS:HJk|
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package org.rut.util.algorithm; uF1 4;
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import org.rut.util.algorithm.support.BubbleSort; I'^XEl?
import org.rut.util.algorithm.support.HeapSort; }st~$JsV1
import org.rut.util.algorithm.support.ImprovedMergeSort; I\1"E y
import org.rut.util.algorithm.support.ImprovedQuickSort; 9C2pGfEbn}
import org.rut.util.algorithm.support.InsertSort; M$Ui=GGq
import org.rut.util.algorithm.support.MergeSort; "U"fsAc#
import org.rut.util.algorithm.support.QuickSort; 0^\H$An*k
import org.rut.util.algorithm.support.SelectionSort; e$P^},0/
import org.rut.util.algorithm.support.ShellSort; j,;f#+O`g
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/** &WLN
* @author treeroot 8t=O=l\
* @since 2006-2-2 maHz3:
* @version 1.0 wr:W}Z@pL
*/ FyWf`XTO
public class SortUtil { ("ix!\1K@
public final static int INSERT = 1; 38m9t'
public final static int BUBBLE = 2; qoH:_o8ClO
public final static int SELECTION = 3; {5D%<Te
public final static int SHELL = 4; aMGh$\Pg
public final static int QUICK = 5; fa,:d8
public final static int IMPROVED_QUICK = 6; ,jeHL@>w[
public final static int MERGE = 7; 74:( -vS
public final static int IMPROVED_MERGE = 8; \m}a%/
public final static int HEAP = 9; <}A6 )=T
N\&VJc
public static void sort(int[] data) { 2;*G!rE&*`
sort(data, IMPROVED_QUICK); Q]GS#n
} ks("( nU
private static String[] name={ wJJ|]^0.
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" p>\[[Md
}; p/Q< VV
V"(5U(v{~
private static Sort[] impl=new Sort[]{ ,r~^<m
new InsertSort(), ~Q Q1ZP3
new BubbleSort(), l3u+fE,;_
new SelectionSort(), 568M4xzi
new ShellSort(), XUh&an$
new QuickSort(), ^H2TSaJ;
new ImprovedQuickSort(), xu"-Uj1
new MergeSort(), ,1B4FAR&
new ImprovedMergeSort(), S LeA,T
new HeapSort() Q?LzL(OioN
}; 7VZ^J`3
Z.Z31yF:f
public static String toString(int algorithm){ +mD;\iW]
return name[algorithm-1]; [tSv{
} eN|zD?ba&
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public static void sort(int[] data, int algorithm) { [.Md_
impl[algorithm-1].sort(data); I4w``""c
} %%n&z6w-
Fje /;p
public static interface Sort { ## vP(M$
public void sort(int[] data); .pe.K3G&
} W{!5}Sh
f%t N2k
public static void swap(int[] data, int i, int j) { 9[*P`*&
int temp = data; 3hBYx@jTO
data = data[j]; "QS(4yw?jg
data[j] = temp; g8&& W_BI
} \24'iYtqW
} }id)~h_@