[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; hY-;Wfg
} 57v[b-SK
int i1=l; s-k~_C>Fw
int i2=mid+1; dm)V \?b
for(int cur=l;cur<=r;cur++){ @hQ+pG@s
if(i1==mid+1) kOFEH!9&
data[cur]=temp[i2++]; TLPy/,
else if(i2>r) HR.S.(t[_
data[cur]=temp[i1++]; f!xIMIl)+
else if(temp[i1] data[cur]=temp[i1++]; f.V0uBDN
else r_FW)Fu^
data[cur]=temp[i2++]; 7.8ukAud
} j%]i#iqF
} cV&(L]k>`
@>(l}5U5
} PrDvRWM
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改进后的归并排序: x>&1;g2r
:9_K@f?n
package org.rut.util.algorithm.support; .6(Bf$E
;vQ7[Pv.j
import org.rut.util.algorithm.SortUtil; W%Br%VQJ
;G;vpl
/** 1 (P>TH
* @author treeroot L a0H
* @since 2006-2-2 HTf7r-
* @version 1.0 +3]@0VM26;
*/ '`/1?,=
public class ImprovedMergeSort implements SortUtil.Sort { ? Yy[8_(tN
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private static final int THRESHOLD = 10; 8l+\Qyj
g9GE0DbT`
/* y9Yh%M(
* (non-Javadoc) 2ai \("?
* afGb}8 Q9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) q,0o:nI
*/ #E{OOcM
public void sort(int[] data) { 3$(1LN
int[] temp=new int[data.length]; ,)S|%tDW
mergeSort(data,temp,0,data.length-1); #x':qBv#
} q:J,xC_sF(
0qw,R4YK
private void mergeSort(int[] data, int[] temp, int l, int r) { (`!?p ^>A
int i, j, k; _d %H;<_
int mid = (l + r) / 2; X/2Xr(z"k
if (l == r) 8yB
return; v)okVyv
if ((mid - l) >= THRESHOLD) J3S@1"
mergeSort(data, temp, l, mid); B~caHG1b
else 9_5Fl,u z
insertSort(data, l, mid - l + 1); nd'zO#"m?
if ((r - mid) > THRESHOLD) cDm_QYQ
mergeSort(data, temp, mid + 1, r); `[VoW2CLH+
else )i.p[
insertSort(data, mid + 1, r - mid); `:-{8Vo7
`fY~Lv{4d_
for (i = l; i <= mid; i++) { ,]y)Dy
temp = data; PG&@.KY
} )O#>ONm^
for (j = 1; j <= r - mid; j++) { ,DXNq`24
temp[r - j + 1] = data[j + mid]; 2Z\6xb|u
} "'^#I_*Mf
int a = temp[l]; J0C,KU(
int b = temp[r]; C8-4 m68"
for (i = l, j = r, k = l; k <= r; k++) { '7u#uL,pa1
if (a < b) { H.'MQ
data[k] = temp[i++]; st+X~;PX*
a = temp; #gUM%$
} else { Ke~a
data[k] = temp[j--]; 4F??9o8}
b = temp[j]; q,PB;TT
} B&O931E7
} 6^if%62l&
} f+Put
" <m)Fh;
/** vp[~%~1(
* @param data hGcOk[m 4
* @param l T&tCXi
* @param i \2L%%M
*/ z"Gk K T
private void insertSort(int[] data, int start, int len) { ]9l=geZd%;
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); A+iQH1C0h
} Y"K7$+5#\
} f:KKOLm
} 8N'`kd~6[
} N|h`}*:x=
u f.Zg;Vc
堆排序： BBnj}XP*4
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package org.rut.util.algorithm.support; HZ>Xm6DnC5
I'`Q_5s5
import org.rut.util.algorithm.SortUtil; yLW iY~Fd
:cnH@:
/** ujXC#r&
* @author treeroot W&A22jO.1
* @since 2006-2-2 w5bD
* @version 1.0 MV-fDqA(
*/ &s_[~g<
public class HeapSort implements SortUtil.Sort{ Ja4O*C<
IMmoq={(z
/* (non-Javadoc) 9mEC|(m*WK
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $Dxz21|P7
*/ +w?RW^:Q=
public void sort(int[] data) { -|~6Zf"
MaxHeap h=new MaxHeap(); xm6=l".%z
h.init(data); xx)egy_
for(int i=0;i h.remove(); od"Oq?~/t
System.arraycopy(h.queue,1,data,0,data.length); 7i`@`0
} b%2+g<UKh
c*'D
private static class MaxHeap{ @{+c6.*}
m*6C *M
void init(int[] data){ npkE[JE:
this.queue=new int[data.length+1]; bJ*jJl x
for(int i=0;i queue[++size]=data; 9KN75<n
fixUp(size); X2 c<.
} ?\L@Pr|=Dr
} EJ`JN|,M
x=pq-&9>B
private int size=0; (|(#~o]40t
z4D[>2*
private int[] queue; ;f:}gMK
f wWI2"}
public int get() { <5?.s< y$"
return queue[1]; ne4j_!V{Mf
} c|
]R~K-cN`
public void remove() { f7c%Z:C#Y
SortUtil.swap(queue,1,size--); p&/}0eL y
fixDown(1); ak 94"<p
} HP}d`C5<R
file://fixdown GD<xmuo
private void fixDown(int k) { n dgG1v%
int j; "a %5on
while ((j = k << 1) <= size) { ?B3
if (j < size %26amp;%26amp; queue[j] j++; 'te4mY}
if (queue[k]>queue[j]) file://不用交换 GLrHb3@"N
break; @iWql*K;m
SortUtil.swap(queue,j,k); DUUQz:?{J
k = j; 0l=g$G \%
} FJDx80J
} dr#g[}l'H
private void fixUp(int k) { pT\>kqmj
while (k > 1) { sDA&U9;
int j = k >> 1; @2ZE8O#I
if (queue[j]>queue[k]) ejP273*ah
break; 2x%Xx3!
SortUtil.swap(queue,j,k); *Y8nea^$
k = j; ?UCK
} SC/|o
} 'au7rX(
nA$zp
} w64/$
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} _P9Th#UAg
,)-7f|
SortUtil： *F7ksLH|q
r/E'#5 Q
package org.rut.util.algorithm; `(NMHXgG+
iv@ey-,<
import org.rut.util.algorithm.support.BubbleSort; J<J_yRg2
import org.rut.util.algorithm.support.HeapSort; JtA tG%
import org.rut.util.algorithm.support.ImprovedMergeSort; fy&vo~4i;
import org.rut.util.algorithm.support.ImprovedQuickSort; v53qpqc
import org.rut.util.algorithm.support.InsertSort; rBR,lS$4
import org.rut.util.algorithm.support.MergeSort; >HMuh)
import org.rut.util.algorithm.support.QuickSort; lQ/u#c$n
import org.rut.util.algorithm.support.SelectionSort; )"SP >2}
import org.rut.util.algorithm.support.ShellSort; t0t" =(d
DPIIE2X
/** ?U3X,uv5J
* @author treeroot -UD^O*U
* @since 2006-2-2 q=Cc2|Ve
* @version 1.0 %C}TdG(C
*/ c~j")o
public class SortUtil { ]!l]^/.
public final static int INSERT = 1; nSUQ Eho<
public final static int BUBBLE = 2; s'/b&Idf8
public final static int SELECTION = 3; zg)-RCG
public final static int SHELL = 4; 7Uy49cs,
public final static int QUICK = 5; ="X2AuK%1$
public final static int IMPROVED_QUICK = 6; .8[Uk^q
public final static int MERGE = 7; T.m*LM
public final static int IMPROVED_MERGE = 8; yffg_^fR
public final static int HEAP = 9; ey4RKk,
+\r=/""DW
public static void sort(int[] data) { cPQUR^!5
sort(data, IMPROVED_QUICK); !yxb=>A
} =Yd{PZ*fR
private static String[] name={ ;fg8,(SM^
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" PDwi])6mf
}; T4H/D^X|
HP`dfo~j
private static Sort[] impl=new Sort[]{ TCb 7-s
new InsertSort(), Z1@E
new BubbleSort(), .&|Ivz6
new SelectionSort(), G.ag$KF
new ShellSort(), L?[NXLn+
new QuickSort(), (~}P.?C8
new ImprovedQuickSort(), }ZPO^4H;-
new MergeSort(), ?ks3K-.4
new ImprovedMergeSort(), ?<_yW#x6
new HeapSort() 6 GL.bS
}; 6xDYEvHS
CC8M1iW3
public static String toString(int algorithm){ H83Gx;
return name[algorithm-1]; PAYbsn
} k)'y;{IN
nu'r`
public static void sort(int[] data, int algorithm) { '{e9Vh<x
impl[algorithm-1].sort(data); c,wYXnJ_t
} +`y{r^xD
gd#j{yI/Xf
public static interface Sort { xK7xAO
public void sort(int[] data); !&8nwOG
} ,RP"m#l!\
UaW,#P
public static void swap(int[] data, int i, int j) { tBJCfM
int temp = data; ](^$5Am
data = data[j]; nU^-D1s{
data[j] = temp; REEs}88);'
} !xqy6%p
} T/m4jf2