[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; fs-LaV 0
} tx)$4v
int i1=l; ya[f?0b0
int i2=mid+1; j<`3xd'
for(int cur=l;cur<=r;cur++){ eI-SWwmv/u
if(i1==mid+1) 8(\J~I[^
data[cur]=temp[i2++]; FA := )
else if(i2>r) 947;6a%$
data[cur]=temp[i1++]; vif)g6,
else if(temp[i1] data[cur]=temp[i1++]; Bsha)<
else @/:7G.
data[cur]=temp[i2++]; /t! 5||G
} /^v!B`A@
} unKl5A[h
!\'H{,G
} :{VXDT"
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改进后的归并排序: *e<}hmDr
Uq`6VpZ
package org.rut.util.algorithm.support; _+Sf+ta
jatlv/,
import org.rut.util.algorithm.SortUtil; )y i~p
LbYIRX
/** [9V}>kS)
* @author treeroot B#+n$5#FK
* @since 2006-2-2 +-9-%O.(;
* @version 1.0 DuT6Od/f
*/ sv!v`zh
public class ImprovedMergeSort implements SortUtil.Sort { gsUF\4A(J
!YI<A\P
private static final int THRESHOLD = 10; o!U(=:*b
UFu0{rY_
/* r=SCbv
* (non-Javadoc) q2'}S A/
* FP}I+Ys
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) o|q5eUh=EY
*/ !Q5,Zhgr
public void sort(int[] data) { <&gs)BY
int[] temp=new int[data.length]; T>7N "C
mergeSort(data,temp,0,data.length-1); m{$}u@a
} {`e-%<
l9OpaOVfJ
private void mergeSort(int[] data, int[] temp, int l, int r) { kjB'WzZ8
int i, j, k; Qe-Pg^PS]
int mid = (l + r) / 2; D~Ef%!&
if (l == r) d{t@+}0.u
return; pzoh9}bue
if ((mid - l) >= THRESHOLD) ]9)iBvQlj
mergeSort(data, temp, l, mid); #sBL E
else .tppCy
insertSort(data, l, mid - l + 1); _}ii1fLv
if ((r - mid) > THRESHOLD) H9i7y,[*
mergeSort(data, temp, mid + 1, r); VH<d[Mj
else WPAUY<6f
insertSort(data, mid + 1, r - mid); ;\6@s3
60cQ3.e
for (i = l; i <= mid; i++) { f F)M'C
temp = data; s6Dkh}:d
} (5,x5l]-N
for (j = 1; j <= r - mid; j++) { (6NDY5h~=n
temp[r - j + 1] = data[j + mid]; S'W,AkT
} d*VvQU8C
int a = temp[l]; ryw%0H18
int b = temp[r]; !#WQ8s!?o
for (i = l, j = r, k = l; k <= r; k++) { i+_=7(e
if (a < b) { "Da-e\yA
data[k] = temp[i++]; qY'+@^<U;
a = temp; Pk;yn;
} else { 7U1M;@y
data[k] = temp[j--]; < W`gfpzO
b = temp[j]; g/ShC8@=u
} 9nY|S{L
} B$YoglEW:
} -mGG:#yP
0l& '`
/** 9<toDg_
* @param data k;`1Ia
* @param l 85)C7tJ-g
* @param i F$jy~W_
*/ &|}QdbW
private void insertSort(int[] data, int start, int len) { ^#mWV
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 2boyBz}=S
} /;/:>c
} 9N{?J"ido
} hkm}oYW+
} %&VI-7+K
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堆排序： Y\WVkd(+G
lY(_e#
package org.rut.util.algorithm.support; >ov#\
R@s|bs?
import org.rut.util.algorithm.SortUtil; i+in?!@G:
!Q_Wbu\U
/** G`jvy@
* @author treeroot b_6cK#
* @since 2006-2-2 7FyE?
* @version 1.0 GnUD<P=I
*/ [KHlApL
public class HeapSort implements SortUtil.Sort{ f+!J1
Y?7GFkIP$
/* (non-Javadoc) ~av#r=x
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) jO5R~O`
*/ l0URJRK{*
public void sort(int[] data) { 4X7J~
MaxHeap h=new MaxHeap(); a#i|)[
h.init(data); +9|0\Q
for(int i=0;i h.remove(); 00f'G2n
System.arraycopy(h.queue,1,data,0,data.length); .5!`wwVi
} ,7:-V<'Yv
]s^+/8d=
private static class MaxHeap{ Vy[xu$y
(ER9.k2
void init(int[] data){ Wa.xm_4s2
this.queue=new int[data.length+1]; "4Q_F3?_`
for(int i=0;i queue[++size]=data; UcD<vg"p
fixUp(size); Ayg^<)JWh
} SCe$v76p#
} r-xP6
lw}7kp4 2F
private int size=0; ER~RBzp
k'N``.
private int[] queue; S ~h*U2
\}W3\To_
public int get() { CueC![pj
return queue[1]; w xte
} 7B\NP`l
0gW{6BtPWm
public void remove() { 3h>L0
SortUtil.swap(queue,1,size--); H~vrCi~t"
fixDown(1); + jeOZ
} E@xrn+L>-
file://fixdown &fWC-|
private void fixDown(int k) { i^iu#WC
int j; 4k3pm&
while ((j = k << 1) <= size) { $oM>?h_=
if (j < size %26amp;%26amp; queue[j] j++; 1L'Q;?&2H,
if (queue[k]>queue[j]) file://不用交换 3RGmmX"?G
break; `{h)-Y``
SortUtil.swap(queue,j,k); dR< d7
k = j; |39,n~"o&
} -P|claO0
} .zt&HI.F
private void fixUp(int k) { vk X+{n
while (k > 1) { 0L8fpGJ
int j = k >> 1; k+?gWZ\
if (queue[j]>queue[k]) GiM-8y~
break; Dt(D5A
SortUtil.swap(queue,j,k); OaY89ko
k = j; ){#INmsF
} pg7~%E4
} JrLh=0i9
|te=DCO
} _6,\;"it?8
w|S b`eR
} 3<M yb
(7b9irL&cn
SortUtil： {'h&[f>zcQ
v&/H6r#E.
package org.rut.util.algorithm; v6=%KXSF
o8<~zeI
import org.rut.util.algorithm.support.BubbleSort; /ILd|j(e
import org.rut.util.algorithm.support.HeapSort; eIF6f& F
import org.rut.util.algorithm.support.ImprovedMergeSort; >lQa"F=
import org.rut.util.algorithm.support.ImprovedQuickSort; D]*|Zmr+}
import org.rut.util.algorithm.support.InsertSort; 5VOw}{Pt
import org.rut.util.algorithm.support.MergeSort; : -#w
import org.rut.util.algorithm.support.QuickSort; uF}dEDB|;
import org.rut.util.algorithm.support.SelectionSort; S ;rd0+J
import org.rut.util.algorithm.support.ShellSort; ! M CV@5$
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/** :*|Ua%L_
* @author treeroot 4TPdq&';C:
* @since 2006-2-2 Op]*wwI*h
* @version 1.0 n~\; +U
*/ 5XHejHn>
public class SortUtil { =j- ,yxBvJ
public final static int INSERT = 1; <7rj,O1=
public final static int BUBBLE = 2; ]ilLed
public final static int SELECTION = 3; wf]?:'}
public final static int SHELL = 4; ]4[%Sv6]G
public final static int QUICK = 5; 2#^g] o-N
public final static int IMPROVED_QUICK = 6; `JiWS
public final static int MERGE = 7; =Hd#"9-
public final static int IMPROVED_MERGE = 8; 0KgP'oWvY
public final static int HEAP = 9; V?G%-+^
E' `;
public static void sort(int[] data) { yn]Sc<uK
sort(data, IMPROVED_QUICK); Lhux~,EH
} xl,% Z~[
private static String[] name={ |X A0F\
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" fvH{va.
}; R59iuHQ[
m^qFaf)6
private static Sort[] impl=new Sort[]{ K`9~#Zx$
new InsertSort(), =_C&lc"
new BubbleSort(), 5j]!r
new SelectionSort(), 0ElEaH1z
new ShellSort(), -`\^_nVC
new QuickSort(), {'M/wT)FeC
new ImprovedQuickSort(), p2rT0gu!
new MergeSort(), GeY!f/yQ<
new ImprovedMergeSort(), P%l?C?L
new HeapSort() PcT]
}; DMch88W
a*X{hU9P
public static String toString(int algorithm){ ^(C4Q?[2m
return name[algorithm-1]; 3'0vLi
} >]ux3F3\
F>#F@j^c
public static void sort(int[] data, int algorithm) { I9+h-t
impl[algorithm-1].sort(data); 80Fa i
} \yw5`5g
%Y;^$%X%_
public static interface Sort { d1c+Ii%
public void sort(int[] data); X=m^+%iD
} |3B<;/v5
7~Inxk;
public static void swap(int[] data, int i, int j) { W =Bw*o-
int temp = data; l\V1c90m
data = data[j]; %regt{
data[j] = temp; F4T!&E%6
} N]/cBGy
} Km= Y^x0