[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; 1zRO==b
} ] ?(=rm9u
int i1=l; }g?]B+0
int i2=mid+1; X6RM2
for(int cur=l;cur<=r;cur++){ t2iFd?
if(i1==mid+1) nj mE>2
data[cur]=temp[i2++]; 7Y/_/t~Y
else if(i2>r) \m&:J>^
data[cur]=temp[i1++]; r DuG["
else if(temp[i1] data[cur]=temp[i1++]; Lrq&k40y
else V EzIWNV
data[cur]=temp[i2++]; o;fQ,rP%
} \X!!(Z;6A
} 0W> ",2|z
WlUE&=|Oz2
} #Z :r
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改进后的归并排序: P}gh-5x
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package org.rut.util.algorithm.support; \Z8!iruN
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import org.rut.util.algorithm.SortUtil; h.nzkp5
!?{5ET,gtN
/** I8y\D,
* @author treeroot \GWC5R7Q0j
* @since 2006-2-2 +\4=G@P.J
* @version 1.0 1Q<a+ l
*/ Yh=Zn[U
public class ImprovedMergeSort implements SortUtil.Sort { \T0`GpE
BeQJ/`
private static final int THRESHOLD = 10; eW/Hn
3?:}lY<,
/* Eq t61O$x
* (non-Javadoc) dSbV{*B;>
* M5]wU
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #/T)9=m
*/ <3HJkcYGz
public void sort(int[] data) { lI9 3{!+>
int[] temp=new int[data.length]; 5s;#C/ZZ
mergeSort(data,temp,0,data.length-1); c!zu0\[Id
} ;\h'A(
c}A^0,"z>
private void mergeSort(int[] data, int[] temp, int l, int r) { AOpfByw
int i, j, k; fOfp.`n
int mid = (l + r) / 2; FwyPmtBj
if (l == r) Hogr#Sn2
return; |c)#zSv
if ((mid - l) >= THRESHOLD) ec|IT0;
mergeSort(data, temp, l, mid); {PZe!EQ
else N}\i!YUD
insertSort(data, l, mid - l + 1); NJ.kT uk
if ((r - mid) > THRESHOLD) <T['J]k%
mergeSort(data, temp, mid + 1, r); Ks4TBi&J
else nN[,$`JD,
insertSort(data, mid + 1, r - mid); [yz;OoA:;
m9/a!|fBE
for (i = l; i <= mid; i++) { a.P^+h
temp = data; N'4*L=Ut
} SLW1]ZaG
for (j = 1; j <= r - mid; j++) { F)C8LH
temp[r - j + 1] = data[j + mid]; !*p lK6a
} ~/t#J
int a = temp[l]; "xWC49
int b = temp[r]; 61wiXX"N
for (i = l, j = r, k = l; k <= r; k++) { }+z}vb
if (a < b) { fYwumx`J
data[k] = temp[i++]; pcE.
a = temp; ;kY=}=9
} else { TWy1)30x
data[k] = temp[j--]; il:""x7^y
b = temp[j]; GFvOrRlP\
} @^%# ]x,:
} _b+3;Dy
} t<4+CC2H
K~uoZ~_gA
/** *Nv<,Br,F
* @param data Xh?{%?2
* @param l !$j'F?2>
* @param i \!_ >ul
*/ MD%86m{Sg=
private void insertSort(int[] data, int start, int len) { NS\'o )J
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); kM.zX|_
} /Z^+K
} Q~jUZ-qN
} @rE>D
} a}6Wo=
[K^RC;}nV^
堆排序： 'INdZ8j_
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package org.rut.util.algorithm.support; xSw ^v6!2
Ax&+UxQ0|
import org.rut.util.algorithm.SortUtil; ~#wq sm
$N~8^6
/** )F:hv[iv
* @author treeroot TtHqdKL
* @since 2006-2-2 K1Uur>Pk%
* @version 1.0 1g *4e
*/ J 9z\ qTI
public class HeapSort implements SortUtil.Sort{ bEM-^SR
h9No'!'!
/* (non-Javadoc) j#29L"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) gP`8hNwR
*/ vuHqOAFNs
public void sort(int[] data) { m/<7FU8
MaxHeap h=new MaxHeap(); Uc.K6%iI
h.init(data); \ZXH(N*>2t
for(int i=0;i h.remove(); ]2?t$"G8
System.arraycopy(h.queue,1,data,0,data.length); Q~nc:eWD
} NI3_wV
`U)~fu/\2M
private static class MaxHeap{ }yUZ(k#
b*7OIN5h
void init(int[] data){ =^NR(:SaaU
this.queue=new int[data.length+1]; M5wj79'l"
for(int i=0;i queue[++size]=data; `C,479~J
fixUp(size); #5F\zeo@F?
} $cnIsyKWY
} $Die~rPU
O.}{s;
private int size=0; ;'*"(F=D6
@Kp2l<P
private int[] queue; OXI.>9
oGa8}Vtc
public int get() { 8@Pv nOL
return queue[1]; "+p_{J/P
} 2-FL&DE
;:f.a(~c
public void remove() { ;8H m#p7,
SortUtil.swap(queue,1,size--); Tw=Jc 's
fixDown(1); %6L{Z*(
} ,'[0tl}8K
file://fixdown >A#]60w.
private void fixDown(int k) { @jX[Ho0W'
int j; !M6*A1g5
while ((j = k << 1) <= size) { S-GcH
if (j < size %26amp;%26amp; queue[j] j++; &;|/I`+
if (queue[k]>queue[j]) file://不用交换 Fc{hzqaP8
break; 6Wl+5 a6V
SortUtil.swap(queue,j,k); PE0A`
k = j; (]1n!
} Ovh[qm?Z
} \IIR2Xf,K
private void fixUp(int k) { I!~5.
while (k > 1) { k68\ _NUL
int j = k >> 1; -b8Vz}Y
if (queue[j]>queue[k]) CM_FF:<tn
break; ;mu^WIj
SortUtil.swap(queue,j,k); wUv Zc
k = j; ;~3CuN8
} 9ELLJ@oNC
} 82{Lx7pI
CtfI&rb[
} #3leMZ6
Z+x,Awq
} o[X'We;
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SortUtil： z1K@AaRx
?Mtd3F^o?
package org.rut.util.algorithm; OW;]=k/(
"k[-eFz/@M
import org.rut.util.algorithm.support.BubbleSort; "8>T
import org.rut.util.algorithm.support.HeapSort; E0[ec6^qwY
import org.rut.util.algorithm.support.ImprovedMergeSort; !`JaYUL[e
import org.rut.util.algorithm.support.ImprovedQuickSort; mr&nB
import org.rut.util.algorithm.support.InsertSort; [> Q+=(l
import org.rut.util.algorithm.support.MergeSort; u1R_u9
import org.rut.util.algorithm.support.QuickSort; x\T 9V~8a
import org.rut.util.algorithm.support.SelectionSort; jhl9
import org.rut.util.algorithm.support.ShellSort; /_rEI,[k
]c4?-Vq%u
/** Dk[m)]w\
* @author treeroot 9!&fak_
* @since 2006-2-2 Gm~jC <
* @version 1.0 ErnjIx:
*/ ;EDc1:
public class SortUtil { ~.;+uH<i
public final static int INSERT = 1; YMb\v4
public final static int BUBBLE = 2; >)\x\e
public final static int SELECTION = 3; m^I+>Bp/:
public final static int SHELL = 4; F%M4i`Vh
public final static int QUICK = 5; `f?v_Ui-$
public final static int IMPROVED_QUICK = 6; LlKvi_z
public final static int MERGE = 7; ji9 (!G
public final static int IMPROVED_MERGE = 8; "^Y)&<J&
public final static int HEAP = 9; {}RE;5n\['
}86&? 0j.
public static void sort(int[] data) { GG<{n$h
sort(data, IMPROVED_QUICK); g<(3wL,"
} LhO%^`vu
private static String[] name={ z><uYO$
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" dY[ XNP
}; 2[-@ .gH
_$g6Mj]1z
private static Sort[] impl=new Sort[]{ iZm# "}VG
new InsertSort(), 4LO4SYW7
new BubbleSort(), YW9r'{(D(I
new SelectionSort(), B8_)I.
new ShellSort(), WZ,}]D
new QuickSort(), Vz_ac vfk^
new ImprovedQuickSort(), dp;;20z
new MergeSort(), IsP-[0it
new ImprovedMergeSort(), J8IdQ:4^l
new HeapSort() P5-1z&9O
}; 0se0AcrW
x\0(l5>
public static String toString(int algorithm){ {EU?{#
return name[algorithm-1]; ~xfoZiIA}
} ,t?c=u\5
"u^%~2
public static void sort(int[] data, int algorithm) { f"i(+:la
impl[algorithm-1].sort(data); (OS -v~{r@
} /6S% h-#\
i;Y3pF0%P
public static interface Sort { tf<}%4G
public void sort(int[] data); #x|xL7
} /,Unp1D
!A_<(M<
public static void swap(int[] data, int i, int j) { Q5Yy \M
int temp = data; v|~&I%S7
data = data[j]; [&H$Su}$0
data[j] = temp; ^hL?.xj
} F3uR:)4<M
} P}kBqMM