[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; mFXkrvOf,
} K7N.gT*4
int i1=l; a5xmIp@6
int i2=mid+1; q^k]e{PD
for(int cur=l;cur<=r;cur++){ @ME .
if(i1==mid+1) N_Y*Z`Xb
data[cur]=temp[i2++]; /l@h[}g+d-
else if(i2>r) 2>!?EIE7
data[cur]=temp[i1++]; U?d4 ^
else if(temp[i1] data[cur]=temp[i1++]; Y94/tjt
else jJDYl([
data[cur]=temp[i2++]; s55t>t,g6
} xRU ~hQ
} 4%L-3Ij
KGoHn6jM
} l`A4)8Y@
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改进后的归并排序: ,dO$R.h
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package org.rut.util.algorithm.support; Z2x%
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import org.rut.util.algorithm.SortUtil; Qo;#}%}^^
)Mj $/
/** eX@7f!uz
* @author treeroot J\V.J/
* @since 2006-2-2 GxR, 3
* @version 1.0 {BlKVsQ
*/ U\\nSU
public class ImprovedMergeSort implements SortUtil.Sort { ,@'M'S
+\O[)\
private static final int THRESHOLD = 10; Udh!%QP%[w
:xP$iEA`G
/* w(xRL#%
* (non-Javadoc) 5Si\hk:o
* 'o*:~n
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) IAJYD/Y&?
*/ |rbl sL2?Z
public void sort(int[] data) { ax)j$
int[] temp=new int[data.length]; :9Vd=M6,
mergeSort(data,temp,0,data.length-1); +e6c4Tw/
} a|v}L,
t9Nu4yl
private void mergeSort(int[] data, int[] temp, int l, int r) { +.b@rU6H
int i, j, k; S"z cSkF
int mid = (l + r) / 2; ]$vJK
if (l == r) N3`W%ws`~
return; 2%DleR'i
if ((mid - l) >= THRESHOLD) gxku3<S
mergeSort(data, temp, l, mid); EdPN=
else F|DKp[<]8
insertSort(data, l, mid - l + 1); "n3i(sZ
if ((r - mid) > THRESHOLD) ;5.o;|w?!
mergeSort(data, temp, mid + 1, r); 6!3Jr
else I:qfB2tL)O
insertSort(data, mid + 1, r - mid); n6a*|rE
426)H_wx
for (i = l; i <= mid; i++) { iC{~~W6
temp = data; G{cTQH|
} r_kw "9
for (j = 1; j <= r - mid; j++) { ab=s+[r1
temp[r - j + 1] = data[j + mid]; hR$lX8
} IHg)xZ
int a = temp[l]; L#`9# Q
int b = temp[r]; v0dFP0.;&
for (i = l, j = r, k = l; k <= r; k++) { f~.w2Cna
if (a < b) { /~LXY<-(
data[k] = temp[i++]; ^!*?vHx:
a = temp; Z-{!Z;T)z
} else { (&6C,O~n^.
data[k] = temp[j--]; /I'n]
b = temp[j]; ?]=fC{Rh
} lK? Z38
} / h6(!-"
} Z`?<Ada
q-.e9eoc\
/** $<UX/a\sH
* @param data 0)8QOTeT
* @param l ItTIU
* @param i JL9d&7-
*/ lbES9o5
private void insertSort(int[] data, int start, int len) { O^]I>A#d
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 8dw]i1t<
} FNDLqf!j
} sQA{[l!aj
} {1GW,T!#
} LC/w".oq?
^/W7Xd(s
堆排序： tH:K6^oR
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package org.rut.util.algorithm.support; X*~NE\
@Y>3-,o,S
import org.rut.util.algorithm.SortUtil; +fhyw{
|7Q8WjCQ{m
/** R0<ka[+
* @author treeroot n;"4`6L~
* @since 2006-2-2 |zu>G9m
* @version 1.0 K)qbd~<\
*/ sQ^>.yG
public class HeapSort implements SortUtil.Sort{ Y\T*8\h_[
rI}E2J
/* (non-Javadoc) ~zz|U!TG
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ru`;cXa,
*/ T^a {#B
public void sort(int[] data) { 13Z6dhZu
MaxHeap h=new MaxHeap(); ;f-|rC_"
h.init(data); W4CI=94
for(int i=0;i h.remove(); $/C<^}A
System.arraycopy(h.queue,1,data,0,data.length); 71tMX[x
} ]tZ5XS
h6x+.}}
private static class MaxHeap{ &1Fcwj
EGwY|+3
void init(int[] data){ K74oRKv
this.queue=new int[data.length+1]; GtO5,d_
for(int i=0;i queue[++size]=data; !9"R4~4
fixUp(size); {I 7pk6Qd
} P:k(=CzZ@J
} wc%
+^+wS`Y
private int size=0; (W/jkm
#|XEBOmsQ
private int[] queue; 0iXqAa
=X X_Cnn
public int get() { V8Q#%#)FHe
return queue[1]; 5?kA)!|UB
} Wsz='@XvB
<J-OwO a-1
public void remove() { 8"LaP3U
SortUtil.swap(queue,1,size--); %FFw!eVi
fixDown(1); :,q3?l6
} Q]xW}5 /
file://fixdown QBsDO].J<
private void fixDown(int k) { w#mnGD
int j; sW2LNE
while ((j = k << 1) <= size) { `^J~^Z7Y-
if (j < size %26amp;%26amp; queue[j] j++; %Y Rg1UKY
if (queue[k]>queue[j]) file://不用交换 &`L5UX
break; \N#)e1.0P
SortUtil.swap(queue,j,k); xN"KSQpu
k = j; \Di~DN1
} pjj 5
} )dL?B9d:
private void fixUp(int k) { rF0zGNH
while (k > 1) { ^RWt
int j = k >> 1; P'9aZd
if (queue[j]>queue[k]) om_&|9B)
break; 4_.k Q"'DH
SortUtil.swap(queue,j,k); J|FyY)_
k = j; &<Gq-IN
} 1]>KuXd r
} j|G-9E
oZCi_g 5i
} g41Lh3dj
gy =`cMS@
} `4EOy:a
z~ u@N9M
SortUtil： @I"Aet'XV
,O~2 R
package org.rut.util.algorithm; C-Fp)Zs{0
'*,4F'
import org.rut.util.algorithm.support.BubbleSort; 8]?1gDS|9O
import org.rut.util.algorithm.support.HeapSort; W=EO=}l#
import org.rut.util.algorithm.support.ImprovedMergeSort; UiZ61lw
import org.rut.util.algorithm.support.ImprovedQuickSort; Gm2rjpZeq
import org.rut.util.algorithm.support.InsertSort; UdI>x 4bI
import org.rut.util.algorithm.support.MergeSort; 1M;)$m:
import org.rut.util.algorithm.support.QuickSort; .sG,TLE[<
import org.rut.util.algorithm.support.SelectionSort; ONjc},_
import org.rut.util.algorithm.support.ShellSort; O[L8(+Sn
'6 'XBL?
/** >Au<y,Tw
* @author treeroot >A,WXzAK}S
* @since 2006-2-2 3N*Shzusbt
* @version 1.0 G>RYQ{O
*/ C(0Iv[~y/
public class SortUtil { ^p7(
public final static int INSERT = 1; =hs@W)-O
public final static int BUBBLE = 2; PRz oLzr
public final static int SELECTION = 3; %xZ.+Ff%
public final static int SHELL = 4; F{"%ey">
public final static int QUICK = 5; kN$70N7I;
public final static int IMPROVED_QUICK = 6; >(*jbL]p
public final static int MERGE = 7; f<;9q?0VF
public final static int IMPROVED_MERGE = 8; -KNJCcBJ
public final static int HEAP = 9; a;S^<8
UUU^YT \
public static void sort(int[] data) { ppnj.tLz;r
sort(data, IMPROVED_QUICK); p 5o;Rvr
} &V:dcJ^Q
private static String[] name={ ]czy8n$+
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" )[K3p{4
}; ibuI/VDF
#] GM#.
private static Sort[] impl=new Sort[]{ UKJY.W!w4
new InsertSort(), Q]7Q
new BubbleSort(), 2DC#PX)i
new SelectionSort(), `P5"5N\h
new ShellSort(), .~U9*5d
new QuickSort(), l46F3C|
new ImprovedQuickSort(), 0/gcSW b
new MergeSort(), ;?o C=c
new ImprovedMergeSort(), Kmnr}Lp9
new HeapSort() K?tk&0
}; /< :;^B
"QF083$
public static String toString(int algorithm){ W^N"y&
return name[algorithm-1]; +i>q;=~
} @ubz?5
\fz j fZ1n
public static void sort(int[] data, int algorithm) { 5VTbW
impl[algorithm-1].sort(data); []]3"n
} g7P1]CZ}
|:#mw1
public static interface Sort { E nvs[YZe
public void sort(int[] data); 9>#|~P&FE
} JJ~?ON.H
_)l %-*Z7p
public static void swap(int[] data, int i, int j) { gCJ'wv)6|%
int temp = data; W$JA4O>b
data = data[j]; XJzXxhk2
data[j] = temp; dc>y7$2
} itF+6wv~
} ?W n(ciO