[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; 3sW!ya-VZ
} "{trK?-8%
int i1=l; j WMTQLE.
int i2=mid+1; *Vg)E*s
for(int cur=l;cur<=r;cur++){ _xy[\X;9
if(i1==mid+1) "rfBYl`
data[cur]=temp[i2++]; +1@'2w{
else if(i2>r) 4eF{Y^
data[cur]=temp[i1++]; fsWIz1K
else if(temp[i1] data[cur]=temp[i1++]; nrX+ '
else i r'C(zD=
data[cur]=temp[i2++]; '&2-{Y [!
} `m#i|8
} gf>GK/^HH
]h=5d09z
} fJ6Q:7
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改进后的归并排序: sZ7~AJ
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package org.rut.util.algorithm.support; 7j29wvSp5
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import org.rut.util.algorithm.SortUtil; EWY'E;0@5
E25w^x2
/** P,(_y8
* @author treeroot g++-v HD
* @since 2006-2-2 EEo I|
* @version 1.0 _%23L|
*/ Mz86bb^J
public class ImprovedMergeSort implements SortUtil.Sort { VvT7v]
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private static final int THRESHOLD = 10; _Vf>>tuW
#?,"/Btq
/* 8EX?/33$
* (non-Javadoc) 3g5r}Ug
* 0Wc_m;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2m} bddS
*/ e,Y<$kPV
public void sort(int[] data) { TP~1-(M)}
int[] temp=new int[data.length]; xE$lx:C"FU
mergeSort(data,temp,0,data.length-1); K-K>'T9F}
} fVVD}GM=
=BJe}AV
private void mergeSort(int[] data, int[] temp, int l, int r) { Le{.B@2-"
int i, j, k; Q04 `+Vr
int mid = (l + r) / 2; .:GOKyr(~
if (l == r) #{^qBP[
return; g#Ta03\
if ((mid - l) >= THRESHOLD) .p?SPR
mergeSort(data, temp, l, mid); qQ6@43TC
else cSNeWJKA6
insertSort(data, l, mid - l + 1); ,oPxt
if ((r - mid) > THRESHOLD) ledr[)
mergeSort(data, temp, mid + 1, r); |`s:&<W+kp
else N R4\TU
insertSort(data, mid + 1, r - mid); Aon.Y Z
CS5[E-%}T=
for (i = l; i <= mid; i++) { -WR<tkK
temp = data; _OS,zZ0
} [7g-M/jvY
for (j = 1; j <= r - mid; j++) { FC||6vJth
temp[r - j + 1] = data[j + mid]; N9y+Psh
} W-Vc6cq
int a = temp[l]; K5t.OAA:
int b = temp[r]; E7_OI7C
for (i = l, j = r, k = l; k <= r; k++) { '#eT
if (a < b) { {E7STLQ_%
data[k] = temp[i++]; qmenj
a = temp; LR\8M(rtvH
} else { pd& HC
data[k] = temp[j--]; R@/"B?`(f
b = temp[j]; >3&V"^r(|
} e&Q w\Ze
} WwWCNN~}
} GCX?W`
JNJ6HyCU
/** '5~l{3Lw
* @param data wO`G_!W9
* @param l rk@qcQR
* @param i 8xG"hJR
*/ [Fv,`*/sm
private void insertSort(int[] data, int start, int len) { 8.7q -<Q
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ;DVg[#
} :^xNHMp!
} *[BtW56-
} P=\Hi.]%
} gW9`k,U
R,=8)OI2
堆排序： q">}3`k
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package org.rut.util.algorithm.support; 7zJ2n/`m*
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import org.rut.util.algorithm.SortUtil; _-^mxC|M
[TFp2B~)#
/** 8lS RK%
* @author treeroot c': 4e)
* @since 2006-2-2 1<MJ3"60
* @version 1.0 v&3"(fp
*/ t)g%9 k^
public class HeapSort implements SortUtil.Sort{ `PvS+>q
XW@C_@*J
/* (non-Javadoc) q(L.i)w$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) z"QXPIXPk
*/ v\qyDZVV
public void sort(int[] data) { YnW9uy5
MaxHeap h=new MaxHeap(); mFxt +\
h.init(data); H~SU:B:
for(int i=0;i h.remove(); D ] n|d+
System.arraycopy(h.queue,1,data,0,data.length); C8)Paop$
} Aayd3Ph0%
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private static class MaxHeap{ MpvGF7H
_@gg,2 u-
void init(int[] data){ {?EmO+![}
this.queue=new int[data.length+1]; |$ZS26aYw}
for(int i=0;i queue[++size]=data; ZM<UiN
fixUp(size); 81(\8#./
} sG[qlzR=8
} J$sp6g>K
'zT7$ .L
private int size=0; a|#pl!
1 XJZuv,T:
private int[] queue; [7[Qw]J
pF8:?p['z
public int get() { * LWihal
return queue[1]; p>:.js5.a
} ?i\V^3S n$
;C , g6{
public void remove() { FeQo,a
SortUtil.swap(queue,1,size--); _bg Zl
fixDown(1); jVN=_Y}\
} GC3d7
file://fixdown Fm6]mz%~u#
private void fixDown(int k) { GK6CnSV8d
int j; UX.rzYM&T
while ((j = k << 1) <= size) { jUR* |
if (j < size %26amp;%26amp; queue[j] j++; $ndBT+i
if (queue[k]>queue[j]) file://不用交换 ]Y76~!N
break; z7)$m0',?
SortUtil.swap(queue,j,k); X*d!A >s
k = j; dnXu(e%
} ,!g/1m
} /6yVbo"
private void fixUp(int k) { b&1hj[`)
while (k > 1) { U2vb&Qu/
int j = k >> 1; fb^R3wd$ff
if (queue[j]>queue[k]) nA.U'=`
break; 4e; le&
SortUtil.swap(queue,j,k); _%B,^0;C
k = j; K V?+9qa,
} @Gw]cm
} 6"}F KRR
EM+! ph
} 0b8=94a{>
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} Pc5C*{C
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SortUtil： uGW#z_{(n
B>\q!dX3
package org.rut.util.algorithm; 0oBAJP
0]]OE+9<c
import org.rut.util.algorithm.support.BubbleSort; ba ,n/yH
import org.rut.util.algorithm.support.HeapSort; o_kZ
import org.rut.util.algorithm.support.ImprovedMergeSort; |Zp') JiS
import org.rut.util.algorithm.support.ImprovedQuickSort; |UQ[pas
import org.rut.util.algorithm.support.InsertSort; US-f<Wq
import org.rut.util.algorithm.support.MergeSort; EGFPv'De
import org.rut.util.algorithm.support.QuickSort; R$`&g@P="
import org.rut.util.algorithm.support.SelectionSort; o54=^@>O<j
import org.rut.util.algorithm.support.ShellSort; xcQ^y}JN
D(dV{^} 9
/** oY,{9H37b
* @author treeroot :J2^Y4l2
* @since 2006-2-2 IDh`*F
* @version 1.0 &G\C[L
*/ ;b=7m#5
public class SortUtil { ]6|?H6'/`v
public final static int INSERT = 1; EQZ/v gho
public final static int BUBBLE = 2; .RmoO\ ,Gm
public final static int SELECTION = 3; p<l+js(5|
public final static int SHELL = 4; !,5qAGi0
public final static int QUICK = 5; DZb0'+jQ
public final static int IMPROVED_QUICK = 6; aM,g@'.=
public final static int MERGE = 7; 2~r2ErtS
public final static int IMPROVED_MERGE = 8; v~._]f$:
public final static int HEAP = 9; U-f8D
nKtRJ,>
public static void sort(int[] data) { :fy,%su
sort(data, IMPROVED_QUICK); _z.CV<
} s*i,Ph
private static String[] name={ X(DP=C}v9
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" "@5{=
}; `Jj b4]
v{*2F
private static Sort[] impl=new Sort[]{ |Dq?<Ha
new InsertSort(), Ju;^^
new BubbleSort(), ]_|%!/_
new SelectionSort(), "e>9R'y
new ShellSort(), /6\uBy"Xt
new QuickSort(), ?@Tsd@s~r
new ImprovedQuickSort(), Yc3\
new MergeSort(), o@aXzF2
new ImprovedMergeSort(), PG|Zu3[
new HeapSort() Py+ B 2G|
}; gS]
7M?Sndp$
public static String toString(int algorithm){ _@y9=e
return name[algorithm-1]; 9O^~l2`
} G2@'S&2@s
]<q!pE;t
public static void sort(int[] data, int algorithm) { ["ocZ? x
impl[algorithm-1].sort(data); Z7e"4wA
} AAB_Ytf
,MHF
public static interface Sort { o`'4EVw*
public void sort(int[] data); I\j-
} Zny9TP
{%,4P_m
public static void swap(int[] data, int i, int j) { PtL8Kd0`C
int temp = data; .uN(44^+x
data = data[j]; 5,|{|/
data[j] = temp; H,j_2JOY=
} ]f wW dtz1
} 8/ukzY1!