[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; kEDZqUD
} L|'ME| '
int i1=l; 9&FV=}MO
int i2=mid+1; E|#R0n*
for(int cur=l;cur<=r;cur++){ QX3![;0F
if(i1==mid+1) a;6\T*iJ!
data[cur]=temp[i2++]; I%WK*AORM
else if(i2>r) l\y*wr`
data[cur]=temp[i1++]; H ?:#Ui(p
else if(temp[i1] data[cur]=temp[i1++]; 8WQ%rN={8
else Hjkgy%N
data[cur]=temp[i2++]; u1Yp5jp^K
} IYC#H}
} 6df&B .gg
;|%JvptwW%
} c<x6_H6[8
tB?S0;yXjd
改进后的归并排序: :QSW^x
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package org.rut.util.algorithm.support; K:Go%3~,
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import org.rut.util.algorithm.SortUtil; 2^lT!X@
?pY!sG
/** ==r|]~x
* @author treeroot U2?gODh'
* @since 2006-2-2 VO6y9X"
* @version 1.0 /pN2Jst
*/ Wm&f+{LO+K
public class ImprovedMergeSort implements SortUtil.Sort { Ox'.sq4
P!ICno6[e
private static final int THRESHOLD = 10; . +?lID
;z=C]kI6M
/* \Y 4Z Q"0Q
* (non-Javadoc) mwhn=y#]*
* dz9-+C{m
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <TuSU[]
*/ ,p1]_D&
public void sort(int[] data) { &4FdA|9T
int[] temp=new int[data.length]; &3?yg61Ag
mergeSort(data,temp,0,data.length-1); L` "UeNT
} B.WkHY%/
3?(p;
private void mergeSort(int[] data, int[] temp, int l, int r) { ?{IvA:
int i, j, k; Z.(x|Q9
int mid = (l + r) / 2; M.Ik%nN#K0
if (l == r) ;^i,Q} b/
return; RV(z>XM
if ((mid - l) >= THRESHOLD) m~B=C>r}t
mergeSort(data, temp, l, mid); DNe^_v)]|
else Ee&$9 )t
insertSort(data, l, mid - l + 1); OwaXG/z~
if ((r - mid) > THRESHOLD) __c_JU
mergeSort(data, temp, mid + 1, r); #OTsD+2Za=
else o>tT!8rH
insertSort(data, mid + 1, r - mid); .).<L`q
xU"qB24]=
for (i = l; i <= mid; i++) { DV"ri
temp = data; yBiwYk6
} k~dr;j
for (j = 1; j <= r - mid; j++) { 4Pdk?vHK;
temp[r - j + 1] = data[j + mid]; (Mh\!rMg
} [40 YoVlfM
int a = temp[l]; FCPRg^=<!~
int b = temp[r]; 'b,D;'v
for (i = l, j = r, k = l; k <= r; k++) { c y$$}
if (a < b) { r&DK> H
data[k] = temp[i++]; !:e qPpz
a = temp; Qd?P[xm
} else { 0^z$COCv
data[k] = temp[j--]; [9^e u>)A
b = temp[j]; jwox?]f+
} ,&SJ?XAs
} G#v7-&Yl6
} d`/{0:F
9@B+$~:}7
/** 2[hl^f^%,
* @param data OpE+e4~IF
* @param l 2ZeL
* @param i kv b-=
*/ 7d5x4^EYE
private void insertSort(int[] data, int start, int len) { /K<Nlxcm
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); _C\b,D}p
} Of=z!|l2
} OHo0W)XUU
} XN;eehB?aE
} H!u:P?j@\
8=9sIK2
堆排序： 9g"H9)EZ^
]Ox.6BKjDP
package org.rut.util.algorithm.support; NM Ajt>t
zOw]P6Gk
import org.rut.util.algorithm.SortUtil; =qvU9p2o
z wW9>Y
/** Z}wAh|N-
* @author treeroot VJaL$Wv)H
* @since 2006-2-2 \zwb>^
* @version 1.0 QPEv@laM
*/ MC@cT^Z^
public class HeapSort implements SortUtil.Sort{ 5EUkp6Y
W| p?KJk)
/* (non-Javadoc) Dr:}k*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~k3r$e@
*/ ![V- e
public void sort(int[] data) { @:I/lg=Qd
MaxHeap h=new MaxHeap(); M{QNpoM
h.init(data); HPQ,tlp6j
for(int i=0;i h.remove(); @\R)k(F
System.arraycopy(h.queue,1,data,0,data.length); ^-_!:7TH]
} (XH)1 -Z!
zU%aobZ
private static class MaxHeap{ `ijX9c
\ck3y]a[
void init(int[] data){ LzfLCGA^
this.queue=new int[data.length+1]; =`U[{3A_
for(int i=0;i queue[++size]=data; Cu]X&l
fixUp(size); n'H\*9t
} :\Z0^{
} "e"`Or
S}/CzQ
private int size=0; S}E@*t2h
+}Pa/8ybJ
private int[] queue; 2~)]E#9
))N^)HR
public int get() { lI 8"o>-~
return queue[1]; mx yT==E
} /Kvb$]F+!
K&*FI (a
public void remove() { 1jyWP#M#
SortUtil.swap(queue,1,size--); r4sR5p]|
fixDown(1); 8z-Td-R6
} 83a Rq&(R
file://fixdown 9maw+c!~
private void fixDown(int k) { gyK"#-/_d
int j; f2=s{0SX0
while ((j = k << 1) <= size) { M: 6cma5
if (j < size %26amp;%26amp; queue[j] j++; L!Ro`6|7;
if (queue[k]>queue[j]) file://不用交换 D-.>Dw:
break; O\w%E@9Fh
SortUtil.swap(queue,j,k); (LjY<dQO
k = j; u+'=EGl
} [F%\1xh
} %YXC-E3@O
private void fixUp(int k) { w~9gZ&hdp
while (k > 1) { Z%Gvf~u
int j = k >> 1; R&QT 'i
if (queue[j]>queue[k]) 8/CGg_C1
break; 9(_/jU4mc
SortUtil.swap(queue,j,k); f`%k@\
k = j; sw1XN?O
} K^S#?T|[9
} k[p
F-Ea85/K@4
} R Mm`<:H_
T^'i+>F!w
} ziOmmL(r
p,+~dn;=
SortUtil： l>ttxYBa<d
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package org.rut.util.algorithm; z 4-wvn<*
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import org.rut.util.algorithm.support.BubbleSort; Uu(W62
import org.rut.util.algorithm.support.HeapSort; y^ :x2P
import org.rut.util.algorithm.support.ImprovedMergeSort; [{ pc1U-
import org.rut.util.algorithm.support.ImprovedQuickSort; !>tXib]:
import org.rut.util.algorithm.support.InsertSort; .^uu*S_
import org.rut.util.algorithm.support.MergeSort; (<CLftQKg
import org.rut.util.algorithm.support.QuickSort; ~(8A&!#,!
import org.rut.util.algorithm.support.SelectionSort; /vhh2`
import org.rut.util.algorithm.support.ShellSort; [Y*UCFhI0
ubLLhf
/** .28*vkH%C=
* @author treeroot QWoEo
* @since 2006-2-2 L*Y}pO
* @version 1.0 =[WccF
*/ h^s}8y
public class SortUtil { _,}Ye,(^=
public final static int INSERT = 1; _i 8oWy1
public final static int BUBBLE = 2; \rJk[Kec
public final static int SELECTION = 3; ZjcJYtD
public final static int SHELL = 4; S("bN{7nE
public final static int QUICK = 5; & mWq'h
public final static int IMPROVED_QUICK = 6; YS]RG/'
public final static int MERGE = 7; DlP}Fp{
public final static int IMPROVED_MERGE = 8; 4-m%[D |W
public final static int HEAP = 9; 3FdoADe{{
j% nd
public static void sort(int[] data) { ~i \69q%
sort(data, IMPROVED_QUICK); ^K"`k43{
} ]?r8^LyZ4
private static String[] name={ i8{jMe!Sa
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 5&>(|Y~I
}; 82<L07fB
hYV{N7$U|
private static Sort[] impl=new Sort[]{ Cfj*[i4
new InsertSort(), `{/=i|6
new BubbleSort(), z23KSPo
new SelectionSort(), +k>v^sz
new ShellSort(), 84{<]y
new QuickSort(), N 8OPeY
new ImprovedQuickSort(), Y/+ D4^L
new MergeSort(), p.%$
new ImprovedMergeSort(), bHP-Z9riv
new HeapSort() #0R;^#F/
}; xv2;h4{<
;V;4#
public static String toString(int algorithm){ ?YS`?Rr
return name[algorithm-1]; J kA~Ol
} +bSv-i-
n33SWE(
public static void sort(int[] data, int algorithm) { {ys_uS{c*
impl[algorithm-1].sort(data); kO.rgW82
} ._yr7uY[M
YZk&'w
public static interface Sort { Ip4~qGJ
public void sort(int[] data); LP\ Qwj{
} T/3UF
U*b SM8)L*
public static void swap(int[] data, int i, int j) { HDaec`j
int temp = data; L}9@kjW
data = data[j]; c.~|)^OXXO
data[j] = temp; J+TYm%A;-
} Qknd^%
} i et|\4A