[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; %M;{+90p>t
} 0= -D
int i1=l; g#<M/qn
int i2=mid+1; dWhF[q"
for(int cur=l;cur<=r;cur++){ Ujss?::`G
if(i1==mid+1) ;AE%f.Y
data[cur]=temp[i2++]; fa;GM7<e)
else if(i2>r) D(gpF85t
data[cur]=temp[i1++]; -QP&A >]7
else if(temp[i1] data[cur]=temp[i1++]; gfAVxMg
else 'gv7&$X}4
data[cur]=temp[i2++]; OvW/{
} bHH=MLZR:
} .@;,'Xw1~
oxL4* bqZ
} 1@A*Jj[R%
0 ;ov^]
改进后的归并排序: LdYaJh~h
|h65[9DMP
package org.rut.util.algorithm.support; -}r(75C
YK|Y^TU^
import org.rut.util.algorithm.SortUtil; sYY=MD
/yj-^u\R
/** . G ~,h
* @author treeroot k0R;1lZ0n
* @since 2006-2-2 z/t:gc.
* @version 1.0 \l8$1p
*/ d<l-Ldle
public class ImprovedMergeSort implements SortUtil.Sort { ,JmA e6
Y4dTv<=K@i
private static final int THRESHOLD = 10; cP MUu9du
UT7".1H
/* =m=utd8
* (non-Javadoc) Gg9NG`e6I
* 7<VfE`Q3
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~+Da`Wp
*/ wuTCdBu6hU
public void sort(int[] data) { iiZK^/P$
int[] temp=new int[data.length]; Q{Lsr,
mergeSort(data,temp,0,data.length-1); IRQ3>4hI
} u3H2\<
A4W61f
private void mergeSort(int[] data, int[] temp, int l, int r) { v]HiG_C
int i, j, k; U%na^Wu
int mid = (l + r) / 2; [{B1~D-
if (l == r) q3E_.{t
return; '((Ll
if ((mid - l) >= THRESHOLD) DqHVc)9
mergeSort(data, temp, l, mid); ^y"$k
else =7`0hS<@F
insertSort(data, l, mid - l + 1); /< CjBW:
if ((r - mid) > THRESHOLD) q>q@ztt
mergeSort(data, temp, mid + 1, r); xbA% 'p
else o s HE4x
insertSort(data, mid + 1, r - mid); {G%!M+n<
4GRmo"S
for (i = l; i <= mid; i++) { ~f2zMTI|
temp = data; gaJIc^O
} M('cG
for (j = 1; j <= r - mid; j++) { l<$c.GgFd
temp[r - j + 1] = data[j + mid]; V ;)q?ZHg
} :22IY>p
int a = temp[l]; 2;`"B|-T
int b = temp[r]; ]-aeoa#
for (i = l, j = r, k = l; k <= r; k++) { oa?eK
if (a < b) { $V)LGu2(m
data[k] = temp[i++]; ]4>[y?k34
a = temp; 1XO*yZF
} else { Mr(~ *
data[k] = temp[j--]; Yn}_"FO'
b = temp[j]; 9c=_p'G3Fw
} K/u`Wz~A
} SS;QPWRZ
} FBcF
yX(6C]D
/** %d9UWQ
* @param data $0Y&r]'
* @param l 0PnW|N0
* @param i ~Rcd
*/ z~xN]=
private void insertSort(int[] data, int start, int len) { ?Ib/}JST
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); h tn2`
} t?]6>J_V
} %Ys>PzM
} #?i#q%q
} y=\jQ6Fc
Tc)T0dRP
堆排序： %f&(U/
m=S[Y^tR
package org.rut.util.algorithm.support; u hP0Zwn
O`dob&C
import org.rut.util.algorithm.SortUtil; :u{0M&
zux+ooU
/** 8y!fqXm%)
* @author treeroot N)h>Ie
* @since 2006-2-2 @X/S h:
* @version 1.0 l#o43xr
*/ Em@h5V
public class HeapSort implements SortUtil.Sort{ K.R2)o`
}FMl4 _}u
/* (non-Javadoc) h{sW$WA
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2ezuP F
*/ WytCc>oL
public void sort(int[] data) { C)z[Blt
MaxHeap h=new MaxHeap(); 5!Z+2Cu]
h.init(data); 1qUdj[Bj
for(int i=0;i h.remove(); NI(`o8fN
System.arraycopy(h.queue,1,data,0,data.length); "`"j2{9|e!
} ^;s`[f|w
{7eKv+30
private static class MaxHeap{ n/8Kb.Vf
Xx|&%b{{r
void init(int[] data){ ^l^_K)tw*
this.queue=new int[data.length+1]; #s#z@F
for(int i=0;i queue[++size]=data; G-3.-
fixUp(size); #K!Df%,<
} |-_5ouN.
} 45j+n.9=
(4{49b
private int size=0; <\^X,,WtO
@?Y^=0
private int[] queue; YC=BP5^
h;4g#|,
public int get() { |7`Vw Z
return queue[1]; X_'.@q<!CV
} M:`hb$k:
4Ro(r sO
public void remove() { BQS9q'u_
SortUtil.swap(queue,1,size--); .4!N#'
fixDown(1); N`Bt|#R
} a LmVOL{
file://fixdown &ApJ'uC
private void fixDown(int k) { % C 3jxt
int j; U-FA^c;
while ((j = k << 1) <= size) { `8dE8:#Y
if (j < size %26amp;%26amp; queue[j] j++; g=Qga09
if (queue[k]>queue[j]) file://不用交换 dBlOU.B
break; oLr"8R\d>t
SortUtil.swap(queue,j,k); NNl/'ge<\
k = j; ~2H7_+.#
} {my=Li<_H
} q6Q=Zo@
private void fixUp(int k) { oyr2lfz*
while (k > 1) { 99ha/t
int j = k >> 1; jujx3rnK?
if (queue[j]>queue[k]) `90v~OF
break; phc1AN=[E
SortUtil.swap(queue,j,k); f<w*l<@
k = j; :T\WYKX3C
} z'qVEHc)
} D+SpSO7yg
jVA~]a
} 7&At_l_
Mb>6.l
} ]Qu12Wg}P
z$Nk\9wm
SortUtil： Dz50,*}J
OpL6Y+<
package org.rut.util.algorithm; FvJSJ.;E,
0&.lSwa
import org.rut.util.algorithm.support.BubbleSort; c}QJ-I
import org.rut.util.algorithm.support.HeapSort; ^J RTi'v
import org.rut.util.algorithm.support.ImprovedMergeSort; }-L@AC/\#
import org.rut.util.algorithm.support.ImprovedQuickSort; d_,tXV"z&
import org.rut.util.algorithm.support.InsertSort; RE.@ +A
import org.rut.util.algorithm.support.MergeSort; MzG ryM-
import org.rut.util.algorithm.support.QuickSort; 2:N_c\Vi
import org.rut.util.algorithm.support.SelectionSort; vUK>4^{J5
import org.rut.util.algorithm.support.ShellSort; Eo Urc9G2
5qr!OEF2
/** "B}08C,?
* @author treeroot -*lP1Nbp
* @since 2006-2-2 ,>UmKrYo
* @version 1.0 H n!vTB
*/ |d5L Ifb(
public class SortUtil { 1hviT&
public final static int INSERT = 1; 7:L~n(QpP
public final static int BUBBLE = 2; :'dc=C
public final static int SELECTION = 3; l1)pr{A
public final static int SHELL = 4; |+:ZO5FaO
public final static int QUICK = 5; z{g<y^Im+E
public final static int IMPROVED_QUICK = 6; x!~OK::o8
public final static int MERGE = 7; #5C3S3e=
public final static int IMPROVED_MERGE = 8; | q16%6q
public final static int HEAP = 9; W[>TqT63
sOxdq"E
public static void sort(int[] data) { erP>P
sort(data, IMPROVED_QUICK); <PN;D#2bh
} QiweM?-
private static String[] name={ E E|zY%
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" G r|@CZq
}; #=H}6!18
)Zf}V0!?+
private static Sort[] impl=new Sort[]{ gyQ9Z}
new InsertSort(), DiQkT R
new BubbleSort(), 5SL>q`t.bd
new SelectionSort(), /mwr1GU
new ShellSort(), &&nO]p`
new QuickSort(), px>>]>ZMH
new ImprovedQuickSort(), 9BD|uU;0
new MergeSort(), DsW`V~T
new ImprovedMergeSort(), ]2Fo.n
new HeapSort() J8v:a`bX&
}; `VFl|o#H
z#J/*712
public static String toString(int algorithm){ '}`hY1v
return name[algorithm-1]; pu$XUt
} ]az} n(B,
P>T*:!s;
public static void sort(int[] data, int algorithm) { i5<Va@ru!s
impl[algorithm-1].sort(data); fd"~[z[
} Px7g\[]
&/hr-5k
public static interface Sort { SxW}Z_8x
public void sort(int[] data); b)hOzx
} khN:+V|
@ U8}sH^
public static void swap(int[] data, int i, int j) { )~blx+\y
int temp = data; !+45=d 5
data = data[j]; "">fn(
data[j] = temp; G2+)R^FSC
} ?tC}M;~
} LB*#