[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; koj*3@\p/
} gf/<sH2}
int i1=l; fA),^
int i2=mid+1; zIU6bMMT3u
for(int cur=l;cur<=r;cur++){ A "'h0D
if(i1==mid+1) bGlr>@;-r
data[cur]=temp[i2++]; (!Fu5m=<8
else if(i2>r) ~P*{%=a
data[cur]=temp[i1++]; aQj6XGu
else if(temp[i1] data[cur]=temp[i1++]; H*",'`|-
else W4nhPH(
data[cur]=temp[i2++]; j& L@L.d
} ~O3VX75f
} w@,v$4Oi
mZjP;6
} b$`/f:_
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改进后的归并排序: e :@PI(P!
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package org.rut.util.algorithm.support; 4-C'2?
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import org.rut.util.algorithm.SortUtil; F-D$Y?m
RXO5pd
/** 2>Qy*
* @author treeroot [X@JH6U r
* @since 2006-2-2 i=V2 /W}
* @version 1.0 jk%H+<FU`
*/ k<rJm P{
public class ImprovedMergeSort implements SortUtil.Sort { 6O*lZNN
3u,B<
private static final int THRESHOLD = 10; M L7vP
]Z[0xs
/* ?07}\N0~
* (non-Javadoc) q'uGB fE.
* 9LOq*0L_:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) hF5(1s}e$
*/ LK>;\BRe?
public void sort(int[] data) { gMU%.%p2
int[] temp=new int[data.length]; 7(<r4{1?
mergeSort(data,temp,0,data.length-1); _k(&<1i
} "Sw raq
LFvZ 7M\\
private void mergeSort(int[] data, int[] temp, int l, int r) { [?2,(X0yh1
int i, j, k; KfQR(e9n
int mid = (l + r) / 2; +Y>oNX1KN
if (l == r) ]y"=/Nu-Ja
return; .P ??N
if ((mid - l) >= THRESHOLD) ,!P}Y[|
mergeSort(data, temp, l, mid); bb-u'"5^]
else O! _d5r&,
insertSort(data, l, mid - l + 1); KNOVb=#f_
if ((r - mid) > THRESHOLD) 2M+*VO
mergeSort(data, temp, mid + 1, r); va0}?fy.O%
else VWqZ`X
insertSort(data, mid + 1, r - mid); wv Mp~
^RYq !l$
for (i = l; i <= mid; i++) { Nc?'},
temp = data; 3L{)Y`P
} ENFM``dV#
for (j = 1; j <= r - mid; j++) { 2{B ScI5K
temp[r - j + 1] = data[j + mid]; Bz>5OuOVS\
} ,MG`}*N}
int a = temp[l]; }R_Rw:W
int b = temp[r]; d\r-)VWSr"
for (i = l, j = r, k = l; k <= r; k++) { @eq.&{&
if (a < b) { x]t$Zb/Uxa
data[k] = temp[i++]; v'r)d-T
a = temp; ;f)AM}~^Q
} else { c Ze59
data[k] = temp[j--]; kX+98?h-C
b = temp[j]; aF>&X-2
} `^h:}V
} q*cEosi'F?
} r^ABu_u(`I
0:B%,nUM
/** wGxH
* @param data sFsf~|
* @param l Xx\,<8Xn
* @param i e-b>
*/ GH`y-Ul'K
private void insertSort(int[] data, int start, int len) { 2)-4?uz~
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ?MS!t6
} {P)O#
} YoWXHg!U
} d;{k,rP6
} O9AFQ)u
Ep3I*bQ Y
堆排序： aS~~*UHW
[*@ +
package org.rut.util.algorithm.support; ~Bi%8G
2HF`}H)H
import org.rut.util.algorithm.SortUtil; Z_[L5B]Gwd
z|\n^ZK=
/** #er% q:
* @author treeroot ^1_CS*
* @since 2006-2-2 [\&2&
* @version 1.0 lR]FQnZ
*/ {.J<^V
public class HeapSort implements SortUtil.Sort{ j-ob7(v)*]
Qraa0]56
/* (non-Javadoc) #qeC)T
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *eI{g
*/ s-~`Ao' <
public void sort(int[] data) { DgB;6Wl
MaxHeap h=new MaxHeap(); _CBMU'V
h.init(data); "/Gw`^t
for(int i=0;i h.remove(); c:<a"$
System.arraycopy(h.queue,1,data,0,data.length); DhD##5a
} <5}j(jxz}
: t/0
private static class MaxHeap{ aX Ie
xC}'"``s
void init(int[] data){ n^*,JL9@
this.queue=new int[data.length+1]; oA@c.%&
for(int i=0;i queue[++size]=data; pWP1$;8
fixUp(size); {SD%{
} ekqS=KfWl;
} .K`n;lVs
-<M+$hK\
private int size=0; ^66OzT8A
JVr8O`>T
private int[] queue; 6~x a^3G:
=&(e*u_
public int get() { 5".bM8o
return queue[1]; @.`k2lxGd~
} '(g;nU<
[jrfh>v
public void remove() { Gl[1K/,*
SortUtil.swap(queue,1,size--); XL'\$f
fixDown(1); yB 'C9wEH
} ze21Uj1x*
file://fixdown hMUUnr"8;i
private void fixDown(int k) { -= izu]Fb,
int j; $1Zr.ERL|(
while ((j = k << 1) <= size) { =%s6QFR
if (j < size %26amp;%26amp; queue[j] j++; NytodVZ'3
if (queue[k]>queue[j]) file://不用交换 1GB]Yi[>
break; YHMJ5IM@.
SortUtil.swap(queue,j,k); B]6Lbp"oo
k = j; *xY3F8
} -eIo
} p1("
private void fixUp(int k) { {-f%g-@L6|
while (k > 1) { eKZS_Qd
int j = k >> 1; ZSyXzop
if (queue[j]>queue[k]) |f!J-H)
break; &0fV;%N
SortUtil.swap(queue,j,k); #z7yoP
k = j; :{B']~Xf
} 5?([jAOf
} H4j1yD(d
#9~,d<H
} 5%}!z~8Y4
_6'@#DN
} 5UG9&:zu'V
]lqZ9rO
SortUtil： OhlK;hvdB*
gsl_aW!
package org.rut.util.algorithm; ;%^{Zybh
!hHX8TD^J
import org.rut.util.algorithm.support.BubbleSort; 0,Ib74N'w
import org.rut.util.algorithm.support.HeapSort; jicH94#(]
import org.rut.util.algorithm.support.ImprovedMergeSort; .GL@`7"
import org.rut.util.algorithm.support.ImprovedQuickSort; }[h]z7e2S
import org.rut.util.algorithm.support.InsertSort; Z:es7<#y
import org.rut.util.algorithm.support.MergeSort; XXA]ukj;r
import org.rut.util.algorithm.support.QuickSort; `AvK=]
import org.rut.util.algorithm.support.SelectionSort; G6G-qqXy6
import org.rut.util.algorithm.support.ShellSort; ]qu6/Z
Fw t
/** c\&;Xr
* @author treeroot \sfc!5G
* @since 2006-2-2 '>n&3`r5
* @version 1.0 0CK
*/ n&zEYCSI
public class SortUtil { " Up(Vj@
public final static int INSERT = 1; _VTpfeL@n
public final static int BUBBLE = 2; MI(;0
public final static int SELECTION = 3; ^S?f"''y3
public final static int SHELL = 4; tE <?L
public final static int QUICK = 5; Ei\>gXTH1-
public final static int IMPROVED_QUICK = 6; )Q>Ao.
public final static int MERGE = 7; iA[o;D#
public final static int IMPROVED_MERGE = 8; @+Sr~:K
public final static int HEAP = 9; UUb0[oy
|5X59! JL
public static void sort(int[] data) { c3o3i
sort(data, IMPROVED_QUICK); z;Fz3s7
} _\Z'Yl
private static String[] name={ dqo-.,=
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 1~3dX[&
}; :]CL}n$*
Oh>hyY)}
private static Sort[] impl=new Sort[]{ @)vQ>R\k<
new InsertSort(), "@/pQoLy
new BubbleSort(), `~"'\Hw
new SelectionSort(), pV;0Hcy
new ShellSort(), w-xigm>{Z
new QuickSort(), >goHQ30:
new ImprovedQuickSort(), OLm@-I*
new MergeSort(), n;$u%2t2
new ImprovedMergeSort(), yWE\)]9
new HeapSort() D .LR-Z
}; [@8po-()L
kWy@wPqms
public static String toString(int algorithm){ b-#lKWso
return name[algorithm-1]; D6+3f#k6
} 4z26a
a?8)47)
public static void sort(int[] data, int algorithm) { v+`'%E
impl[algorithm-1].sort(data); R5(([C1
} vyB{35p$
(v|<" tv
public static interface Sort { \_6
public void sort(int[] data); 75R#gQ]EV
} !MOsP<2
zUZET'Bm9
public static void swap(int[] data, int i, int j) { Xw<;)m
int temp = data; &=$f\O1Ty
data = data[j]; Dj'?12Onu=
data[j] = temp; A9u>bWIE7
} m)"(S
} B8n[ E