[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; =gv/9ce)3
} cj_?*
int i1=l; *A9{H>Vq
int i2=mid+1; }AfPBfgC1z
for(int cur=l;cur<=r;cur++){ #CP, \G
if(i1==mid+1) `; %aQR
data[cur]=temp[i2++]; _89G2)U=C
else if(i2>r) fQA)r
data[cur]=temp[i1++]; umrI4.1c
else if(temp[i1] data[cur]=temp[i1++]; 2o5<nGn
else ?4?jG3p
data[cur]=temp[i2++]; E4@fP]R+
} `hf9rjy4
} \ozy_s[
jmzvp6N$8
} m@2xC,@
a^/20UFq
改进后的归并排序: Id 7
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package org.rut.util.algorithm.support; ~u&O
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import org.rut.util.algorithm.SortUtil; Q&'Nr3H#tZ
qtwmTT)
/** _~q^YZ
* @author treeroot \$|UFx
* @since 2006-2-2 ~:b~f]lO
* @version 1.0 Y9ce"*b
*/ SF=|++b1f
public class ImprovedMergeSort implements SortUtil.Sort { Y6DiISl
9)hC,)5
private static final int THRESHOLD = 10; * rANf&y
LVtQ^ 5>8
/* hQxe0Pdt
* (non-Javadoc) b!P;xLcb
* J+|V[E<x
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -dN;\x
*/ eh(]'%![/
public void sort(int[] data) { _[tBLGXD
int[] temp=new int[data.length]; _ILOA]ga#
mergeSort(data,temp,0,data.length-1); #,{v Js~
} 8~+Msn:
r+Cha%&D
private void mergeSort(int[] data, int[] temp, int l, int r) { 7+-}8&syu
int i, j, k; Rp9iX~A`e
int mid = (l + r) / 2; 4/vQ=t
if (l == r) ^Wz{su2
return; \Rt
if ((mid - l) >= THRESHOLD) O]!DNN
mergeSort(data, temp, l, mid); >n\Q[W
else !]T|=yw
insertSort(data, l, mid - l + 1); Jev.o]|_,
if ((r - mid) > THRESHOLD) lv&wp@
mergeSort(data, temp, mid + 1, r); 3Ab$
else 39eoL;O_
insertSort(data, mid + 1, r - mid); h*%1Jkxu
H9[.#+ln
for (i = l; i <= mid; i++) { _{);n$`
temp = data; P=z':4,M}
} Y" |U$
for (j = 1; j <= r - mid; j++) { [_Z3v,vt,
temp[r - j + 1] = data[j + mid]; <[~M|OL9q,
} IrM3Uh
int a = temp[l]; `-2`UGB-
int b = temp[r]; 014!~c
for (i = l, j = r, k = l; k <= r; k++) { z [{%.kA
if (a < b) { @@&;gWr;
data[k] = temp[i++]; ^PszZ10T
a = temp; Hc!_o`[{l
} else { h|Qh/jCX
data[k] = temp[j--]; b,`N;*
b = temp[j]; Wc[)mYOSuO
} AU2Nmf?]%
} CeemR>\t
} ~8E rl3=5{
VgL<uxq
/** r]{:{Z
* @param data lPP7w`[PA
* @param l Ok\UIi~
* @param i wEyh;ID3#
*/ [c~zO+x
private void insertSort(int[] data, int start, int len) { Ado>)c"*y1
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); J{I?t~u
} wDzS<mm
} s3S73fNOk
} LdV_7)
} <jjaqDSmz
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堆排序： y6\#{
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package org.rut.util.algorithm.support; BZsxf'eN'
aqgSr|
import org.rut.util.algorithm.SortUtil; [;+YO)
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/** 0jMrL\>C
* @author treeroot Ns{4BM6j
* @since 2006-2-2 4BX*-t
* @version 1.0 IFe[3mB5
*/ -#h \8Xl
public class HeapSort implements SortUtil.Sort{ lU3wIB
n&lLC&dL
/* (non-Javadoc) :mL.Y em*'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) j\<S6%p#R
*/ `!BUd
public void sort(int[] data) { bK7DGw`1
MaxHeap h=new MaxHeap(); na>B{6
h.init(data); YjT #^AH
for(int i=0;i h.remove(); |RdSrVB
System.arraycopy(h.queue,1,data,0,data.length); 2*N# %ZUX
} '=xl}v
w1Kyd?~%]
private static class MaxHeap{ Z]dc%>
dx#N)?
void init(int[] data){ $U1'n@/J
this.queue=new int[data.length+1]; ^;e`ZtcI
for(int i=0;i queue[++size]=data; /on p<u
fixUp(size); Fwtwf{9I
} dBkB9nz
} Z2r\aZ-d`
u]"RAH
private int size=0; . x$` i
l"64w>,
private int[] queue; #i?TCO
p O.8>C%
public int get() { ;6Z?O_zp4
return queue[1]; G(L*8U<UG
} Al?XJ C B@
ZWv$K0agu
public void remove() { 1=>$c
SortUtil.swap(queue,1,size--); UA^E^$f:
fixDown(1); ?hO*~w;UU|
} E^s>S,U[y
file://fixdown b/)UN*~
private void fixDown(int k) { *Z(qk`e.b
int j; ^gy(~u
while ((j = k << 1) <= size) { 8EQ;+V
if (j < size %26amp;%26amp; queue[j] j++; |2Dlw]d
if (queue[k]>queue[j]) file://不用交换 mdwY48b
break; +KZc"0?
SortUtil.swap(queue,j,k); X~0P+E#
k = j; {u7E)Fdl
} p[RD[&#b
} |( KM 8
private void fixUp(int k) { B}p/ ,4x6
while (k > 1) { V&G_Bu~
int j = k >> 1; Y\lBPp0{\v
if (queue[j]>queue[k]) ,QDq+93
break; }-!$KR]:s
SortUtil.swap(queue,j,k); NEvt71k
k = j; }w$/x<Q[
} $O[ut.
} (%bfNs|
RZ -w,~
} e.Ii@<
R!`#pklB
} aw~OvnX E
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SortUtil： U6{ RHS[
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package org.rut.util.algorithm; kb>9;-%^JK
*op7:o_
import org.rut.util.algorithm.support.BubbleSort; v / a/
import org.rut.util.algorithm.support.HeapSort; |Q$C%7
import org.rut.util.algorithm.support.ImprovedMergeSort; GYj`-t
import org.rut.util.algorithm.support.ImprovedQuickSort; gpPktp2
import org.rut.util.algorithm.support.InsertSort; hPl;2r
import org.rut.util.algorithm.support.MergeSort; dK=BH=S2?X
import org.rut.util.algorithm.support.QuickSort; r`5;G4UI
import org.rut.util.algorithm.support.SelectionSort; 0X@5W$x
import org.rut.util.algorithm.support.ShellSort; F"LT\7yjyG
=%bc;ZUu
/** lps
* @author treeroot 8`*(lKiL
* @since 2006-2-2 #)XO,^s.
* @version 1.0 $.`(2
*/ MtS$ovg?
public class SortUtil { SkxTgX5
public final static int INSERT = 1; UZV)A}
public final static int BUBBLE = 2; "?]5"lNC|
public final static int SELECTION = 3; E3`KO'v%
public final static int SHELL = 4; ~_K
public final static int QUICK = 5; Dq\#:NnKvx
public final static int IMPROVED_QUICK = 6; WvR}c
public final static int MERGE = 7; "~GudK &
public final static int IMPROVED_MERGE = 8; X(bb1
public final static int HEAP = 9; &Zov9o:gx
:QN,T3i'/3
public static void sort(int[] data) { \4V'NTjB
sort(data, IMPROVED_QUICK); GU!|J71z
} @NO&3m]
private static String[] name={ U5Rzfm4
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" l_DPlY
}; $ \jly
&98qAO]Z
private static Sort[] impl=new Sort[]{ F M`pPx
new InsertSort(), n6oVx5/
new BubbleSort(), |ek*wo
new SelectionSort(), qoOHWh&
new ShellSort(), VGTo$RH
new QuickSort(), b\}`L"
new ImprovedQuickSort(), "|f;
new MergeSort(), e7<~[>g)
new ImprovedMergeSort(), A=BpB}b
new HeapSort() AX6e}-S1n
}; I(<1-3~
=MMWcK&
public static String toString(int algorithm){ a29mVmi>
return name[algorithm-1]; )M1.>?b
} K":-zS
XfB;^y=u8
public static void sort(int[] data, int algorithm) { 2 !{P<
impl[algorithm-1].sort(data); >5 Ce/P'R
} Oi7|R7NE
<{e0i
public static interface Sort { IN_GL18^MV
public void sort(int[] data); #E>f.:)
} |i1z47jN6P
UUX _x?BD
public static void swap(int[] data, int i, int j) { IWTD>c).
int temp = data; ^ 3Vjmv
data = data[j]; 8amtTM
data[j] = temp; 594$X@!v
} #~(@Ka.eA0
} IDv@r\Xw