[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; ~vKDB$2
} /;WFRp.
int i1=l; $?y\3GX
int i2=mid+1; uo3o[H&#
for(int cur=l;cur<=r;cur++){ gH/(4h
if(i1==mid+1) <*z9:jzQ
data[cur]=temp[i2++]; e7n`fEpO
else if(i2>r) &XB1=b5
data[cur]=temp[i1++]; {CQI*\O
else if(temp[i1] data[cur]=temp[i1++]; 3^]Kd
else nQ;M@k&9eV
data[cur]=temp[i2++]; ZmS ]4WM<
} bq z*90
} K Vnz{cx`
JnS@}m
} ]Uul~T
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改进后的归并排序: ;eC8| Xz
,EH^3ODD
package org.rut.util.algorithm.support; CJt(c,!z
6JD~G\$
import org.rut.util.algorithm.SortUtil; 7@Xi*Azd
JPq' C$
/** "LM[WcDX
* @author treeroot ,yTT,)@<
* @since 2006-2-2 ><{Lh@{
* @version 1.0 Tz{-L%*#
*/ J )UCy;Y
public class ImprovedMergeSort implements SortUtil.Sort { K%YR; )5A
@VnK/5opS
private static final int THRESHOLD = 10; }T"&4Rvs2R
v\-7sgZR
/* KA elq*
* (non-Javadoc) VujIKc#4
* m">2XGCn
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) i)@H
*/ `Gh#2U
public void sort(int[] data) { ,p6o "-
int[] temp=new int[data.length]; gt!tDu
mergeSort(data,temp,0,data.length-1); W"H(HA
} Ex5LhRe>=
5$c*r$t_RK
private void mergeSort(int[] data, int[] temp, int l, int r) { ]f*.C9Y
int i, j, k; 3u4P [
int mid = (l + r) / 2; bEb+oRI
if (l == r) v|:TYpku3
return; nw=:+?
if ((mid - l) >= THRESHOLD) ZX0!BS
mergeSort(data, temp, l, mid); du&9mOrr
else 6,(S}x YDZ
insertSort(data, l, mid - l + 1); R!2E`^{Wl
if ((r - mid) > THRESHOLD) vpoJ{TPO
mergeSort(data, temp, mid + 1, r); 14yzGhA
else {$'oKJy*
insertSort(data, mid + 1, r - mid); oI x!?,1
)pw53,7>aN
for (i = l; i <= mid; i++) { uwu`ms7z 2
temp = data; `}#n#C)
} P.kf|,8L
for (j = 1; j <= r - mid; j++) { `FAZAC\
temp[r - j + 1] = data[j + mid]; iM~qSRb#mJ
} #yOn /
int a = temp[l]; f&? 8fB8{
int b = temp[r]; S~V?Qe@&Z
for (i = l, j = r, k = l; k <= r; k++) { Im@Yx^gc
if (a < b) { ,ZvlKN
data[k] = temp[i++]; #g]eDU-[
a = temp; hv)d
} else { C0;:")6~
data[k] = temp[j--]; 59k-,lyU,
b = temp[j]; TJs~}&L
} tF!-}{c"k
} ZvSEa{
} FIpJ>E"n
$aj:\A0f
/** }PzHtA,V
* @param data /}=cv>S5V
* @param l EkEQFd 5g
* @param i >7 qZ\#
*/ p&ZLd`[
private void insertSort(int[] data, int start, int len) { S=X_7V
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); a@N 1"O
} c6LPqPcN
} yS@xyW /
} LR y&/d
} 0yL%Pjn6
#w;%{C[D
堆排序： fU'[lZ
xi=Qxgx0I
package org.rut.util.algorithm.support; Env_??xq
i 8:^1rHp)
import org.rut.util.algorithm.SortUtil; A<{&?_U
p~dj-w
/** X,`e1nsR
* @author treeroot )<_:%oB
* @since 2006-2-2 cT#R B7
* @version 1.0 WR}<^ax
*/ sF1j4 NC
public class HeapSort implements SortUtil.Sort{ Q&e*[l2M6
>0I\w$L
/* (non-Javadoc) :6W* ;<o
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >{#QS"J#
*/ y-o54e$4Cq
public void sort(int[] data) { nw
MaxHeap h=new MaxHeap(); 9~}.f1z
h.init(data); 6<9gVh<=w
for(int i=0;i h.remove(); yGlOs]>n
System.arraycopy(h.queue,1,data,0,data.length); e%KCcU
} Kj*$'('
YT)@&HaF
private static class MaxHeap{ #LfoG?k1K
D*!9K8<o
void init(int[] data){ %SwhNn
this.queue=new int[data.length+1]; DTCOhUIV
for(int i=0;i queue[++size]=data; m]/sR3yF
fixUp(size); ^zR*s |1Q
} h2vD*W
} ^q/_D%]C
N6!$V7oT
private int size=0; }RZN3U=
;%PI
private int[] queue; Kl w9
-PskUl'
public int get() { Cm#[$T@C
return queue[1]; rIJd(=
} }N W01nee
LRv[,]b
public void remove() { P#qQde/y
SortUtil.swap(queue,1,size--); '~[JV>5
fixDown(1); %Su,
} >npFg@A
file://fixdown '))=y@M
private void fixDown(int k) { zN,2 (v"
int j; SsQg8d
while ((j = k << 1) <= size) { `h$^=84
if (j < size %26amp;%26amp; queue[j] j++; ^-26K|{3
if (queue[k]>queue[j]) file://不用交换 /U@Y2$TOF
break; a<v!5\dq!
SortUtil.swap(queue,j,k); Wh1'?#
k = j; iKEHwm
} 6|]e}I@<2
} "j?\Ze*
private void fixUp(int k) { 'SnB7Y
while (k > 1) { p=]z`t
int j = k >> 1; td(4Fw||1y
if (queue[j]>queue[k]) ]BY<D`$$P
break; ;<nQl,2N
SortUtil.swap(queue,j,k); dR >hb*kJ
k = j; yIma7H@=L
} S3> <zGYk
} &9\8IR>
e2L4E8ST<
} qruv^#_l
JG=z~STz
} vABUUAo!Jr
zfm#yDf
SortUtil： &``nYI g/
T#-U\C~o
package org.rut.util.algorithm; E<L6/rG
3}2a3)
import org.rut.util.algorithm.support.BubbleSort; `8G {-_
import org.rut.util.algorithm.support.HeapSort; 9Vtn62+
import org.rut.util.algorithm.support.ImprovedMergeSort; 6Wc'5t3
import org.rut.util.algorithm.support.ImprovedQuickSort; ~a` vk@8
import org.rut.util.algorithm.support.InsertSort; 4>t=r\"4
import org.rut.util.algorithm.support.MergeSort; HHg[6aw
import org.rut.util.algorithm.support.QuickSort; $Ce;}sM
import org.rut.util.algorithm.support.SelectionSort; |TCg`ZS`cZ
import org.rut.util.algorithm.support.ShellSort; jT1^oXn@
BHJS.o*j~
/** uui3jZ:
* @author treeroot ,w0Io
* @since 2006-2-2 lW3wmSWn%
* @version 1.0 d@>1m:p
*/ peGh-
public class SortUtil { K)9+3(?
public final static int INSERT = 1; g0A,VX:2
public final static int BUBBLE = 2; v}BXH4&Y
public final static int SELECTION = 3; &KVXU0F^z
public final static int SHELL = 4; L~e{Vv8UR
public final static int QUICK = 5; ]$i~;f 8I
public final static int IMPROVED_QUICK = 6; W4n(6esO
public final static int MERGE = 7; L3y`*&e>
public final static int IMPROVED_MERGE = 8; XcM.<Dn3
public final static int HEAP = 9; C^nTLw;K
($[)Tcq*~
public static void sort(int[] data) { s.XLC43Rs
sort(data, IMPROVED_QUICK); Y@Ti2bI`v
} B%/N{i*Z
private static String[] name={ @&GfCg5Cb
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 29r(Y
}; =JfSg'7
Vl%jpjqP
private static Sort[] impl=new Sort[]{ (v1~p3H
new InsertSort(), oO][X
new BubbleSort(), 4-Cca
new SelectionSort(), x`VA3nE9
new ShellSort(), IHvrx:7
new QuickSort(), CyD)=e{
new ImprovedQuickSort(), 5nv1%48Ri
new MergeSort(), nbdjk1E`~
new ImprovedMergeSort(), 6$LQO),,
new HeapSort() ]c\d][R N
}; % n~ 'UA
rxQ&N[r2
public static String toString(int algorithm){ (?lKedA>2
return name[algorithm-1]; aF%V
} !7jVKI80
dI) 9@UL
public static void sort(int[] data, int algorithm) { X^9eCj;c
impl[algorithm-1].sort(data); &M*f4PeXb
} ^Bu55q
m$}Jw<.W
public static interface Sort { \cW9"e'
public void sort(int[] data); (I\qTfN4
} QBL|n+
iuS*Vw
public static void swap(int[] data, int i, int j) { )T!3du:M
int temp = data; klSAY
data = data[j]; SRek:S,
data[j] = temp; vbSycZ2M7
} o2W^!#]=
} ! ,&{1p