[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; 6iozb~!Rr
} BBub'
int i1=l; Qe~2'Hw#9
int i2=mid+1; Qoj}]jve
for(int cur=l;cur<=r;cur++){ 8Jz/'
if(i1==mid+1) a-`OE"
data[cur]=temp[i2++]; is3nLm(
else if(i2>r) %PsDS
data[cur]=temp[i1++]; QSn%~o05
else if(temp[i1] data[cur]=temp[i1++]; O$><E8q
else t*fG;YOg
data[cur]=temp[i2++]; +3c!.] o;
} x bG'![OX
} %Jrdr`<
NMSpi[dr
} UL/|!(s
O\5*p=v
改进后的归并排序: iw,F)O
:qx>P_&y}z
package org.rut.util.algorithm.support; Z66b>.<8
5 i1T?
import org.rut.util.algorithm.SortUtil; !~'\Ey
Kb_R "b3v
/** V/0?0VKG
* @author treeroot IH$R XGL
* @since 2006-2-2 A%VBBvk
* @version 1.0 ;x[F4d
*/ bb6 ~H
public class ImprovedMergeSort implements SortUtil.Sort { ;|2h&8yX(/
sP0pw]!
private static final int THRESHOLD = 10; s[yIvlHw`
u@`)u#
/* mGQgy[gX
* (non-Javadoc) N.J;/!%!
* 3^LSK7.:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) I5"ew=x#
*/ |~! R5|Q
public void sort(int[] data) { CS 7"mE`{
int[] temp=new int[data.length]; s*gyk
mergeSort(data,temp,0,data.length-1); Dm@wTt8N(
} XUD/\MoV
3:$hC8
private void mergeSort(int[] data, int[] temp, int l, int r) { 1}E`K#
int i, j, k; JJnZbJti
int mid = (l + r) / 2; SL;\S74
if (l == r) 0Fw0#eE
return; Ozk^B{{o
if ((mid - l) >= THRESHOLD) +uF!.!}
mergeSort(data, temp, l, mid); ~Od4( }/G
else Sx,O)
insertSort(data, l, mid - l + 1); :E|HP#iwu
if ((r - mid) > THRESHOLD) 1i}Rc:
mergeSort(data, temp, mid + 1, r); mT.p-C
else O&#bC
insertSort(data, mid + 1, r - mid); <v?9:}
>4:W:;R
for (i = l; i <= mid; i++) { _tR%7%3*
temp = data; U.oxLbJ`
} (~oUd4
for (j = 1; j <= r - mid; j++) { ]fXMp*LvY
temp[r - j + 1] = data[j + mid]; rK*s/mX <
} %Fc,$ =
int a = temp[l]; hFw\uETu
int b = temp[r]; _nR8L`l*z
for (i = l, j = r, k = l; k <= r; k++) { TEZ^Ia
if (a < b) { khl(9R4a
data[k] = temp[i++]; /Yk2 |L
a = temp; Kp*nOZ
} else { (o_fY.
data[k] = temp[j--]; %/dYSC
b = temp[j]; .>0e?A4,5?
} "(}xIsy
} y2V9!
} $]CZ]EWts
Vw*;xek?
/** ce{GpmW
* @param data /&=E=S6
* @param l h<.G^c)
* @param i #&.&Uu$
*/ d:0RDK-}s
private void insertSort(int[] data, int start, int len) { AElx #`T
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); [L1pDICoy
} >n@?F[Y
} oK h#th
} ;T2)nSAqt
} wTFM:N
'kc_OvVA
堆排序： /)SwQgK#
b=a&!r5M
package org.rut.util.algorithm.support; r)<]W@Pr
:Ia3yi#
import org.rut.util.algorithm.SortUtil; rE"`q1b#
ZVpMR0!
/** UYH;15s
* @author treeroot >Fm}s,
* @since 2006-2-2 ]RmQ*F-
* @version 1.0 -6MgC9]
*/ 4-[L^1%S[
public class HeapSort implements SortUtil.Sort{ :g3n [7wR
)t{oyBT
/* (non-Javadoc) chsjY]b
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2Z6#3~
*/ lIO.LF3
public void sort(int[] data) { R2Fh WiL
MaxHeap h=new MaxHeap(); N<+ ><>9
h.init(data); XOO!jnQu
for(int i=0;i h.remove(); w[z^B&
System.arraycopy(h.queue,1,data,0,data.length); !v|j C
} 2%N$Y]
80cBLGG
private static class MaxHeap{ ;]?1i4p)
W-%oj.BMA
void init(int[] data){ ^~0Mw;n&
this.queue=new int[data.length+1]; CU 2;m\Hc
for(int i=0;i queue[++size]=data; %'j)~
fixUp(size); 6\)61o_1|
} zF%CFqQ
} x^}kG[s
i]*Wt8~!
private int size=0; (7x5
,v:m
private int[] queue; ,FX;-nP%
DF'-dh</*
public int get() { $b\`N2J-_
return queue[1]; bL (g$Yi
} sTdD=>
Z{`;Ys:zk
public void remove() { Mw@T!)(
SortUtil.swap(queue,1,size--); 9g+/^j^>?f
fixDown(1); _{&znXf>?6
} _n_lO8mK
file://fixdown -;'8#"{`^
private void fixDown(int k) { QJp _>K
int j; 6} !n0
while ((j = k << 1) <= size) { aT[Z#Zd, N
if (j < size %26amp;%26amp; queue[j] j++; }pj>BK>
if (queue[k]>queue[j]) file://不用交换 ?"PUw3V3lB
break; 8 s!0Z1Roc
SortUtil.swap(queue,j,k); ]y@8mb&
k = j; K8doYN
} B2VC:TG>
} dlN(_6>b
private void fixUp(int k) { aOfL;I
while (k > 1) { #gi0FXL
int j = k >> 1; -WwFUm
if (queue[j]>queue[k]) Rj9z'?a9
break; )I{41/_YA
SortUtil.swap(queue,j,k); *PE1)bF
k = j; 33|>u+
} OBi9aFoQ
} (=0W[@k
2}>jq8Y47
} rH8^Fl&jT
QIF|pZ+^
} ;oVdkp
,rc5r3
SortUtil： y.2_5&e/
db^S@}
package org.rut.util.algorithm; DCM,|FE
@Z~lM5n$8
import org.rut.util.algorithm.support.BubbleSort; BKfcK>%g
import org.rut.util.algorithm.support.HeapSort; |E0>-\6
import org.rut.util.algorithm.support.ImprovedMergeSort; gxpR#/(E~
import org.rut.util.algorithm.support.ImprovedQuickSort; R!;tF|]
import org.rut.util.algorithm.support.InsertSort; K>6#MI
import org.rut.util.algorithm.support.MergeSort; {&8-OoH ~
import org.rut.util.algorithm.support.QuickSort; esx<feP)\
import org.rut.util.algorithm.support.SelectionSort; eX7Ev'(H
import org.rut.util.algorithm.support.ShellSort; }9t$Cs%
IBb3A
/** (%"M% Qko
* @author treeroot P0S;aE
* @since 2006-2-2 rA&|!1q"B
* @version 1.0 mf6?8!O}>
*/ aB"W6[
public class SortUtil { MFcN.M
public final static int INSERT = 1; MBRRzq%F
public final static int BUBBLE = 2; 5i7,s
public final static int SELECTION = 3; "0 \U>h
public final static int SHELL = 4; 4%~$A`7
public final static int QUICK = 5; w|gtb~oh
public final static int IMPROVED_QUICK = 6; n|IdEgD$
public final static int MERGE = 7; ~"!F&
public final static int IMPROVED_MERGE = 8; 9+U%k(9
public final static int HEAP = 9; 0[TZ$<v"
lZZ4 O(
public static void sort(int[] data) { Cq;t;qN,nQ
sort(data, IMPROVED_QUICK); !=--pb
} GM|gm-t<@
private static String[] name={ +r *f2\S
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 5WgdgDb@L
}; 2<)63[YO
:XEr{X
private static Sort[] impl=new Sort[]{ e4u$+
new InsertSort(), qCOv4b`
new BubbleSort(), >/nS<y>
new SelectionSort(), bVSa}&*kM
new ShellSort(), {^>m3
new QuickSort(), JYOyz+wNd
new ImprovedQuickSort(), j':Ybr>BR
new MergeSort(), S*Un$ngAh
new ImprovedMergeSort(), yd[}?
new HeapSort() D{I^_~-\5
}; lidzs<W-fW
RxU6.5N
public static String toString(int algorithm){ 1BwCJ7?8
return name[algorithm-1]; _C~e(/=z
} 2;r(?ebw
n?_!gqK
public static void sort(int[] data, int algorithm) { hL~@Ah5&t
impl[algorithm-1].sort(data); Ke,UwYG2~G
} o)Kx:l +f
\ F#mwl,>"
public static interface Sort { Q\&FuU
public void sort(int[] data); .9+"rK}u
} k-xh-&
frbKi _1
public static void swap(int[] data, int i, int j) { ZXljCiNn+\
int temp = data; 01}az~&;35
data = data[j]; j0^~="p%C
data[j] = temp; n(l!T 7
} |4aV~n[>#
} f!a[+^RB: