[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; =Je[c,&j$?
} tnH2sHby
int i1=l; $*e2YQdLo
int i2=mid+1; `UD/}j@
for(int cur=l;cur<=r;cur++){ /|tJ6T1LrB
if(i1==mid+1) AK'[c+2[
data[cur]=temp[i2++]; Fq|Ni$
else if(i2>r) z\K"Rg~J
data[cur]=temp[i1++]; yE:+Lo`>
else if(temp[i1] data[cur]=temp[i1++]; ;j[>9g
else h"X;3b^ m
data[cur]=temp[i2++]; .E`\MtA
} |bTPtrT8
} G`cHCP_n
ZrPbl"`7
} KN<S}3MN
/N=b\-]
改进后的归并排序: 6:b!F
qTdheX/
package org.rut.util.algorithm.support; TE3lK(f
d,+Hd2o^X
import org.rut.util.algorithm.SortUtil; B2>H_dmQ
;LcZ`1
/** 0z1ifg&
* @author treeroot U'H$`$Ov
* @since 2006-2-2 >V-A;S:
* @version 1.0 (}Z@R#njH
*/ /rWd=~[MO
public class ImprovedMergeSort implements SortUtil.Sort { 3{'Ne}5%I
5rw 7;'
private static final int THRESHOLD = 10; dP3CG8w5
i3tg6o4C
/* |iakz|])
* (non-Javadoc) Ag9vU7
* .+PI}[g
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) u+Y\6~=+
*/ %|auAq&w
public void sort(int[] data) { tr<Nm6!
int[] temp=new int[data.length]; Hx"ob_^'7
mergeSort(data,temp,0,data.length-1); nV"~-On
} CAfGH!l!
]~9tYn
private void mergeSort(int[] data, int[] temp, int l, int r) { ZGexdc%
int i, j, k; (?n=33}Ci
int mid = (l + r) / 2; 8EW_V$>R
if (l == r) ck:T,F{}
return; [%q@]\U$s
if ((mid - l) >= THRESHOLD) dq(uVW^&ae
mergeSort(data, temp, l, mid); azCf
else \y97W&AN
insertSort(data, l, mid - l + 1); gH12[Us'`
if ((r - mid) > THRESHOLD) /sx@$cvW
mergeSort(data, temp, mid + 1, r); JZ)RGSG i
else )#?"Gjf~
insertSort(data, mid + 1, r - mid); |n2qVR,
) pzy
for (i = l; i <= mid; i++) { Fq0i`~L~
temp = data; dMh:ulIY>
} }tRm]w
for (j = 1; j <= r - mid; j++) { 2L3)#22m*
temp[r - j + 1] = data[j + mid]; /5S30 |K
} sd*p/Q|4
int a = temp[l]; h k] N6+@
int b = temp[r]; 6.sx?YYM
for (i = l, j = r, k = l; k <= r; k++) { i+A3~w5c
if (a < b) { ~-ia+A6GIV
data[k] = temp[i++]; ]^yFaTfS
a = temp; VLOO8N[o
} else { zwhe
data[k] = temp[j--]; Luq#9(P
b = temp[j]; Ur9?Td'*>
} j]{_s"O
} :*I#n
} Y\D!/T
n`#tKwWHYx
/** N(;1o.~
* @param data ,vr? 2k
* @param l HJ9Kz^TnC
* @param i RiDJ> 6S
*/ _dqzB$JV
private void insertSort(int[] data, int start, int len) { ~5NXd)2+Ks
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Zq^At+8+
} x3hB5p$q
} .!Oo|m`V@
} R cAwrsd
} h?AS{`.1
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堆排序： N:S/SZI
|z9*GY6RU
package org.rut.util.algorithm.support; M\o9I
ZT'`hK_up
import org.rut.util.algorithm.SortUtil; M||+qd W!
*{YlN}vA
/** T/b6f;t-s
* @author treeroot 6"wlg!k8
* @since 2006-2-2 /z4$gb7Y
* @version 1.0 WYHQ?
*/ I5`4Al
public class HeapSort implements SortUtil.Sort{ L5Ebc#
? E1<!~
/* (non-Javadoc) 7S-ys+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) MDnKX?Y
*/ v_<rNc,z-s
public void sort(int[] data) { 6^V=?~a&z
MaxHeap h=new MaxHeap(); XeW<B0~
h.init(data); !<j'Ea
for(int i=0;i h.remove(); |nc@"OJ
System.arraycopy(h.queue,1,data,0,data.length); %>yG+Od5Z
} w^?>e;/\
/$ w%Q-p
private static class MaxHeap{ n&L+wqJ
4;w;'3zq
void init(int[] data){ sQ=]NF)\
this.queue=new int[data.length+1]; h:W;^\J:-
for(int i=0;i queue[++size]=data; n4s+>|\M
fixUp(size); ?ME6+Z\
} jfP*"uUK
} rxe>}ZO
,-$LmECg
private int size=0; 9eGyyZg
4qO+_!x{)
private int[] queue; 6w*dKInG[-
&4{KV.
public int get() { :nh_k4S@v
return queue[1]; ?}Z1bH
} q]\:P.x!>
fX(3H1$"
public void remove() { {'NZ.
SortUtil.swap(queue,1,size--); ls_'')yp
fixDown(1); cL-[ZvyVX
} }QN1|mP2
file://fixdown JUsQ,ETn
private void fixDown(int k) { >NO[UX%yP
int j; D|lzGt
while ((j = k << 1) <= size) { Y#]+Tm(+
if (j < size %26amp;%26amp; queue[j] j++; -j+UMlkB
if (queue[k]>queue[j]) file://不用交换 4~ q5,^kgB
break; [^R^8k
SortUtil.swap(queue,j,k); Gk. ruQW"
k = j; |!1Y*|Q%s
} (jnzT=y
} [/PR\'|
private void fixUp(int k) { ")_|69 VX
while (k > 1) { Hu^1[#
int j = k >> 1; l\E%+?K+^
if (queue[j]>queue[k]) ",p;Sd
break; 0QBiC]9
SortUtil.swap(queue,j,k); 6|K5!2
k = j; d:_t-ZZo
} 3YeG$^y"
} P!$Zx)T
H_B4
} qPWP&k
gcii9vz `
} 9"@\s$ OBk
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SortUtil： 6}Vf\j~
9 3U_tQ&1?
package org.rut.util.algorithm; nxY\|@
u9:`4b
import org.rut.util.algorithm.support.BubbleSort; Yw22z #K
import org.rut.util.algorithm.support.HeapSort; Kh"?%ZIa
import org.rut.util.algorithm.support.ImprovedMergeSort; N@;?CKU
import org.rut.util.algorithm.support.ImprovedQuickSort; -<c=US
import org.rut.util.algorithm.support.InsertSort; jTf@l?|
import org.rut.util.algorithm.support.MergeSort; CHdX;'`*
import org.rut.util.algorithm.support.QuickSort; aC^\(wp[
import org.rut.util.algorithm.support.SelectionSort; @+;$jRwq
import org.rut.util.algorithm.support.ShellSort; ;5wn67'
`Y+J-EQ
/** o=u3&liBi
* @author treeroot ~{*7"o/
* @since 2006-2-2 (ScxLf=]
* @version 1.0 #&cI3i
*/ +y,T4^{
public class SortUtil { x* DarSk
public final static int INSERT = 1; g6W)4cC8a
public final static int BUBBLE = 2; jAGTD I
public final static int SELECTION = 3; 'UkxS b
public final static int SHELL = 4; `^91%f
public final static int QUICK = 5; A]y`7jJ
public final static int IMPROVED_QUICK = 6; T\:4qETQF]
public final static int MERGE = 7; 7@C<oy_bb
public final static int IMPROVED_MERGE = 8; x9NEFtqjm
public final static int HEAP = 9; ".f ;+wH
xpNH?#&
public static void sort(int[] data) { u=Fv2
sort(data, IMPROVED_QUICK); :fKl]XO
} <i<J^-W
private static String[] name={ :KH g&ZX7
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" jy7\+i
}; MtM%{=&_
y9_V
private static Sort[] impl=new Sort[]{ ~aw.(A?MI
new InsertSort(), Dw|}9;5:A
new BubbleSort(), uzXCIv@
new SelectionSort(), iz5CAxm
new ShellSort(), '#! gh?
new QuickSort(), {Z{75}
new ImprovedQuickSort(), TH)"wNa
new MergeSort(), hrmut*<|
new ImprovedMergeSort(), d; [C6d
new HeapSort() ~"dA~[r L
}; 4pe'06:
RFKtr
public static String toString(int algorithm){ YW-usvl&
return name[algorithm-1]; m%rd0=}57
} \:R%4w#Jv
$v,dz_O*\
public static void sort(int[] data, int algorithm) { yH7F''O7
impl[algorithm-1].sort(data); R|JC1f8P5
} `id9j
mCRt8rY;
public static interface Sort { ;g8R4!J
public void sort(int[] data); so^lb?g
} >82@Q^O
YgKZ#?*
public static void swap(int[] data, int i, int j) { YX%[ipgB
int temp = data; H/,gro
data = data[j]; z|fmrwkN'$
data[j] = temp; })uGRvz
} 9s_vL9u
} xrlmKSPa