[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; "|'`'W
} tTFoS[V
int i1=l; 93Gur(j^
int i2=mid+1; 3K!0 4\
for(int cur=l;cur<=r;cur++){ |2<f<k/UT
if(i1==mid+1) $cOD6Xr)d
data[cur]=temp[i2++]; 1:!rw,Jzl`
else if(i2>r) R$fIb}PDr
data[cur]=temp[i1++]; -NPkN%h
else if(temp[i1] data[cur]=temp[i1++]; (bt]GAxb1
else ];d:z[\P
data[cur]=temp[i2++]; W>s'4C`
} C9H11g7{
} <M OL{jan
,;P`Mf'YC
} \u_v7g
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改进后的归并排序: >.hGoT!_k
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package org.rut.util.algorithm.support; -fx88
px>>]>ZMH
import org.rut.util.algorithm.SortUtil; U9o*6`"o
Hs}"A,V
/** ]A]E)*
* @author treeroot 70 UgKE
* @since 2006-2-2 !(_xu{(DL
* @version 1.0 K2rS[Kdfaq
*/ z83:a)U
public class ImprovedMergeSort implements SortUtil.Sort { `VFl|o#H
ZU.)K>'
private static final int THRESHOLD = 10; !-RpRRR[Co
%H}Y]D~R
/* SfobzX}~Jh
* (non-Javadoc) ^1,Eo2yN
* `/JR}g{O
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,L{o,qzC
*/ b#;N!VX
public void sort(int[] data) { \Tf{ui
int[] temp=new int[data.length]; T7,Gf({
mergeSort(data,temp,0,data.length-1); v~2XGm
} Df,VV+
9;Pu9s[q2
private void mergeSort(int[] data, int[] temp, int l, int r) { ls"\YSq$
int i, j, k; V=4u7!ha
int mid = (l + r) / 2; dezL{:Ya
if (l == r) Vc52s+7=8
return; aho<w+l@
if ((mid - l) >= THRESHOLD) 3zA=q[C
mergeSort(data, temp, l, mid); y]pN=<*h5
else ]6%%X+$7
insertSort(data, l, mid - l + 1); Q xF8=p
if ((r - mid) > THRESHOLD) ~:}XVt0%8
mergeSort(data, temp, mid + 1, r); qv*uM0G6i
else 4fu\3A&
insertSort(data, mid + 1, r - mid); ~sHZh
&]yJCzo]
for (i = l; i <= mid; i++) { Y5i`pY/}#?
temp = data; G2+)R^FSC
} BdoC6H
for (j = 1; j <= r - mid; j++) { v*'iWHCl,
temp[r - j + 1] = data[j + mid]; ioY\8i
} d!QD vO
int a = temp[l]; BQuliX&
int b = temp[r]; zj$_iB`9
for (i = l, j = r, k = l; k <= r; k++) { aBVEk2 p
if (a < b) { : 9?Cm`
data[k] = temp[i++]; ,Z*3,/a
a = temp; @2~O^5[>
} else { X|damI%
data[k] = temp[j--]; !Zyx$2K
b = temp[j]; y|+~>'^JR
} p]V-<
} R#7+
} &X]=Qpl
,4>WLJDo
/** BtpjQNN
* @param data x:n9dm
* @param l TCKI
* @param i 2.Eu+*UC
*/ kJvy<(iG
private void insertSort(int[] data, int start, int len) { ngkeJ)M0$
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); '^F|k`$r
} \;B$hT7z*
} Zn<(,e
} Gxh~
} 4j@kMe;RjZ
ySuLt@X
堆排序： zA'gb'MmW
H7tQ#
package org.rut.util.algorithm.support; 93^(O8.
c6Yf"~TD0
import org.rut.util.algorithm.SortUtil; <(bCz>o|
R%)2(\
/** RlslF9f
* @author treeroot j""y2c1
* @since 2006-2-2 Y( V3PnH
* @version 1.0 LG Y!j_bD
*/ _8x'GK tU
public class HeapSort implements SortUtil.Sort{ ;vI*ThzdD
m[@%{
/* (non-Javadoc) +Jo 3rX'`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Vyq#p9Q
*/ -lP )
public void sort(int[] data) { rAlh& ?X
MaxHeap h=new MaxHeap(); {7K'<ti
h.init(data); oc3dd"8}@
for(int i=0;i h.remove(); l6S19Kv
System.arraycopy(h.queue,1,data,0,data.length); *< $c =
} re ]Ste
_d\u!giy
private static class MaxHeap{ u8<&F`7j
;*wT,2;
void init(int[] data){ <*A|pns
this.queue=new int[data.length+1]; n?ZL"!$
for(int i=0;i queue[++size]=data; o%/-5-
fixUp(size); 409x!d~it
} _UH/}!nqB
} 2|0Qk&
G.-h=DT]
private int size=0; T1Gp$l
GCP{Z]u
private int[] queue; [xZ/ZWb/
SG dfhno;
public int get() { y~==waZw
return queue[1]; 2,8/Cb
} *l>[`U+
;T5,T
public void remove() { 6Q.{llO
SortUtil.swap(queue,1,size--); ~),;QQ,
fixDown(1); r 1l/) ;
} l50|` 6t
file://fixdown 08Pt(kzNA
private void fixDown(int k) { ,Lt~u_lve
int j; .g/ARwM}
while ((j = k << 1) <= size) { C@TN5?Z
if (j < size %26amp;%26amp; queue[j] j++; {[M0y*^64$
if (queue[k]>queue[j]) file://不用交换 o~OwE7H)A
break; z`emKFbv
SortUtil.swap(queue,j,k); >%uAQiU
k = j; `2B*CMW{
} p4m^ ~e
} 1a($8>
private void fixUp(int k) { ,2 zt.aqB
while (k > 1) { `G=ztL!gq
int j = k >> 1; H4PbO/{xO
if (queue[j]>queue[k]) toS(UM n
break; ;Pol#0_(
SortUtil.swap(queue,j,k); E3~,+68U
k = j; rxs~y{Xi
} Z&+NmOY4
} /v}P)&
zuC58B
} <ICZ"F`S
1A7%0/K-]
} _'!aj+{
!Y ;H(.A/
SortUtil： N5pinR5 H
Xt</ -`
package org.rut.util.algorithm; iGG6Myp-
_u:>1]
import org.rut.util.algorithm.support.BubbleSort; `3f_d}b
import org.rut.util.algorithm.support.HeapSort; -Z:]<;qU
import org.rut.util.algorithm.support.ImprovedMergeSort; /6+1{p
import org.rut.util.algorithm.support.ImprovedQuickSort; !cq=)xR
import org.rut.util.algorithm.support.InsertSort; "C_T]%'Wm
import org.rut.util.algorithm.support.MergeSort; +V)qep"
import org.rut.util.algorithm.support.QuickSort; }1U#Ve,=_
import org.rut.util.algorithm.support.SelectionSort; t$U3|r
import org.rut.util.algorithm.support.ShellSort; nc3sty1`
ES^>[2Y
/** ;j>*;Q`
* @author treeroot (NGu9uJs
* @since 2006-2-2 e$CePLEj
* @version 1.0 %v5)s(Yu
*/ lhLnygUk
public class SortUtil { *)MX%`Z}
public final static int INSERT = 1; [leW/2i
public final static int BUBBLE = 2; Um]p&phVL
public final static int SELECTION = 3; H7{Q@D8
public final static int SHELL = 4; %xf)m[JU=
public final static int QUICK = 5; IZv~[vi_
public final static int IMPROVED_QUICK = 6; U8CWz!;Qz
public final static int MERGE = 7; 6BDt.bG
public final static int IMPROVED_MERGE = 8; +68+PhHF
public final static int HEAP = 9; 2{Wo-B,wt~
~R :<Bw
public static void sort(int[] data) { 7IA3q{P
sort(data, IMPROVED_QUICK); z7-`Y9Ypd
} +O)]^"TG
private static String[] name={ 3^!Hl8P7
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Q Oz9\,C
}; oS~}TR:}
C@*%AY
private static Sort[] impl=new Sort[]{ `*>V6B3
new InsertSort(), 7SBM^r}
new BubbleSort(), ?QGmoQ)
new SelectionSort(), %0vTA_W
new ShellSort(), ;(K
new QuickSort(), ! mm5I#s
new ImprovedQuickSort(), u K'<xM"%T
new MergeSort(), }KK2WJp#M
new ImprovedMergeSort(), }0$mn)*k
new HeapSort() vT?Q^PTO
}; . 3GnZR,L
Q(lku"U'
public static String toString(int algorithm){ BR;QY1
return name[algorithm-1]; %moJF1
} \;-qdV_JB
;SfNKu
public static void sort(int[] data, int algorithm) { c\M#5+1j
impl[algorithm-1].sort(data); 6^Ph '
} {]=v]O|,
Q4X7Iu:
public static interface Sort { Xad*Iulj
public void sort(int[] data); {] O`gG
} ,:^ N[b
x Y| yI>
public static void swap(int[] data, int i, int j) { x;Gz6|
int temp = data; +L0J_.5%^
data = data[j]; 8)sg_JC
data[j] = temp; NjbwGcH%\
} t)ld<9)eB
} !(Q l)C