[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; aj^wRzJ}zA
} S!v(+|
int i1=l; <{5EdX
int i2=mid+1; _Q[$CcDEE
for(int cur=l;cur<=r;cur++){ QX4ai3v
if(i1==mid+1) 42J{aJVH
data[cur]=temp[i2++]; $D'-k]E[H
else if(i2>r) (QoI<j""
data[cur]=temp[i1++]; ZyrI R
else if(temp[i1] data[cur]=temp[i1++]; (xHf4[[u
else 9H-|FNz?c
data[cur]=temp[i2++]; %a+mk E
} G+UMBn
} \R36w^c3
?L&'- e@
} .Z:zZ_Ev
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改进后的归并排序: VXLT^iX
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package org.rut.util.algorithm.support; eq(am%3~
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import org.rut.util.algorithm.SortUtil; }X*Riu7gk
li~d?>
/** I M-L'9
* @author treeroot d)4 m6
* @since 2006-2-2 ydRC1~f0
* @version 1.0 nD5 gP
*/ ?=m?jNa;nC
public class ImprovedMergeSort implements SortUtil.Sort { tg]x0#@s
26&'X+n&
private static final int THRESHOLD = 10; l&iq5}[n&
s7Ub@
/* 6f')6X'x
* (non-Javadoc) "j;4 k.`h
* )M6w5g
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Q8!)!r%
*/ S4=~`$eP
public void sort(int[] data) { )OiT{-m
int[] temp=new int[data.length]; 'Vyt4^$%
mergeSort(data,temp,0,data.length-1); o(DOQGl
} h 3]wL.V
qlL`jWJ
private void mergeSort(int[] data, int[] temp, int l, int r) { sl]_M
int i, j, k; ]E\n9X-{
int mid = (l + r) / 2; ;;L[e]Z
if (l == r) T!Hb{Cg*
return; Og,$ sH}`
if ((mid - l) >= THRESHOLD) 3|.um_
mergeSort(data, temp, l, mid); +qh[N@F
else Ecd;<$tk
insertSort(data, l, mid - l + 1); ?c[*:N(
if ((r - mid) > THRESHOLD) o.0ci+z@
mergeSort(data, temp, mid + 1, r); WI?oSE w
else G:~k.1y[
insertSort(data, mid + 1, r - mid); nqInb:
v?KC%
for (i = l; i <= mid; i++) { M$Zcn#A
temp = data; D6>HN[D"
} Vx~,Uex0+
for (j = 1; j <= r - mid; j++) { b0lq\9
temp[r - j + 1] = data[j + mid]; $2W%2rZ
} (p2K36,9m
int a = temp[l]; UK<Nj<-'t
int b = temp[r]; zIh['^3.n
for (i = l, j = r, k = l; k <= r; k++) { N5a*7EJv+
if (a < b) { bbrXgQ`s+w
data[k] = temp[i++]; c-B cA
a = temp; vI>>\.ED
} else { .zi_[
data[k] = temp[j--]; o4|M0
b = temp[j]; !o:f$6EA~C
} SQX:7YF~
} RhncBKm*M
} Ney/[3 A
8C*c{(4
/** SHe49!RA'{
* @param data ^s|6vd;PD=
* @param l Pi]19boM.
* @param i xai*CY@cQ
*/ _f$^%?^
private void insertSort(int[] data, int start, int len) { YB-h.1T-
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); d3D] k,
} z6*X%6,8
} r"P|dlV-
} eAE`#t
} 7S}_F^
0*f)=Q'
堆排序： [ucpd
'.:z&gSqx0
package org.rut.util.algorithm.support; `{dm;j5/y
XD.)Dl8
import org.rut.util.algorithm.SortUtil; E*]bgD7V
LDPUD'
/** Xu%'Z".>:
* @author treeroot uG,5BV.M
* @since 2006-2-2 >m$1Xx4#GV
* @version 1.0 jPUwSIP
*/ |5lk9<z
public class HeapSort implements SortUtil.Sort{ be.*#[
P)P*Xqr#:
/* (non-Javadoc) s.$3j$vT 8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) sS*3=Yh
*/ E7rDa1
public void sort(int[] data) { 4 o Fel.o
MaxHeap h=new MaxHeap(); <0Xf9a8>
h.init(data); \W~N
for(int i=0;i h.remove(); _h{C_;a[_
System.arraycopy(h.queue,1,data,0,data.length); sB7# ~pA
} Zy`m!]G]80
h2G$@8t}I
private static class MaxHeap{ Q+[n91ey**
Sc;BCl{=|
void init(int[] data){ x(1:s|Uyp{
this.queue=new int[data.length+1]; 8Vr%n2M
for(int i=0;i queue[++size]=data; AE[b},-[
fixUp(size); JRB9rSN^
} l3)}qu
} oKuI0-*mR
4h|c<-`>t
private int size=0; k>;`FFQU>
HiZ*+T.B
private int[] queue; G?O1>?4C
6^]+[q}3
public int get() { !|^|,"A)
return queue[1]; T&6l$1J
} 8A##\j)
vS;RJg=
public void remove() { %)1y AdG 8
SortUtil.swap(queue,1,size--); bCRV\myd`
fixDown(1); Kp%2k^U
} G<65H+)M\
file://fixdown >qnko9V
private void fixDown(int k) { wW>A_{Y
int j; d;boIP`M;
while ((j = k << 1) <= size) { s6 uG`F"
if (j < size %26amp;%26amp; queue[j] j++; ztcp/1jIvS
if (queue[k]>queue[j]) file://不用交换 Fs9!S a7v
break; ?9 <:QE;I>
SortUtil.swap(queue,j,k); aTH{'mN
k = j; +$ 'Zf0U
} &."iFe
} NG+GEqx
private void fixUp(int k) { "L IF.)
while (k > 1) { 9ijfRqI=x
int j = k >> 1; 3lrT3a3vV
if (queue[j]>queue[k]) 11Q1AN
break; 0CnOL!3.I
SortUtil.swap(queue,j,k); @0Ic3C[rH6
k = j; "g5^_UP
} <? q?Mn
} *#,7d"6W5
"H'B*vc-
} J!dm-L
D+lAhEN
} .s?L^Z^
#NEE7'&S
SortUtil： L>jY.d2w=K
]C!gQq2'a
package org.rut.util.algorithm; u-QB.iQ+s
ha]VWt%}
import org.rut.util.algorithm.support.BubbleSort; ]E5o1eeg
import org.rut.util.algorithm.support.HeapSort; WlOmJtt4)
import org.rut.util.algorithm.support.ImprovedMergeSort; |3(' N#|
import org.rut.util.algorithm.support.ImprovedQuickSort; 1+_`^|eK
import org.rut.util.algorithm.support.InsertSort; )1?y 8_B
import org.rut.util.algorithm.support.MergeSort; 3Z>Ux3[
import org.rut.util.algorithm.support.QuickSort; cuax;0{%
import org.rut.util.algorithm.support.SelectionSort; |mZxfI
import org.rut.util.algorithm.support.ShellSort; Ytn9B}%o
KI"#f$2&
/** Z9v31)q(
* @author treeroot [_BP)e
* @since 2006-2-2 d[iQ`YW5
* @version 1.0 g|o,uD
*/ /CrSu
public class SortUtil { uy>q7C
public final static int INSERT = 1; {&&z-^
public final static int BUBBLE = 2; ?g_3 [Fk
public final static int SELECTION = 3; ; 5*&xz
public final static int SHELL = 4; 7r6.n61F
public final static int QUICK = 5; j\eI0b @*
public final static int IMPROVED_QUICK = 6; G<L;4nA)
public final static int MERGE = 7; yuh *
public final static int IMPROVED_MERGE = 8; <$D`Z-6
public final static int HEAP = 9; =*oJEy"
N=V==Dbu-
public static void sort(int[] data) { P\E<9*V
sort(data, IMPROVED_QUICK); ]%;:7?5l
} 9)l$ aBa
private static String[] name={ ahusta
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" y6g&Y.:o
}; cn3#R.G~
NDN7[7E
private static Sort[] impl=new Sort[]{ nGC/R&
new InsertSort(), &h}#HS>l
new BubbleSort(), \;,_S+Fz8
new SelectionSort(), _P!m%34|
new ShellSort(), bL0yuAwF2
new QuickSort(), xVw9v6@`h
new ImprovedQuickSort(), 2R[:]-b
new MergeSort(), aS>u,=C
new ImprovedMergeSort(), K%t*8 4j
new HeapSort() Kew@&j~
}; j`EXlc~
))qy;Q,
public static String toString(int algorithm){ x`mG<Yt
return name[algorithm-1]; oh4E7yN
} vx{}}/B]J
})'B<vq
public static void sort(int[] data, int algorithm) { ,V7nzhA2
impl[algorithm-1].sort(data); 0j^Kgx
} S;Fi?M
{B~QQMEow
public static interface Sort { 9=s<Ld
public void sort(int[] data); ko!)s
} kXViWOXU^
W~)}xy
public static void swap(int[] data, int i, int j) { 21n?=[
int temp = data; v_yw@
data = data[j]; t$`r4Lb9/
data[j] = temp; &j;wCvE4+
} ez7A4>/
} Mc)}\{J