[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; 0ge$ p,
} v.Q(v\KV5
int i1=l; '7D,m H
int i2=mid+1; :[\v
for(int cur=l;cur<=r;cur++){ d}LRl"_n
if(i1==mid+1) I#m-g-J
data[cur]=temp[i2++]; U7doU'V/
else if(i2>r) 90|7ArM_[
data[cur]=temp[i1++]; !_+8A/
else if(temp[i1] data[cur]=temp[i1++]; af#pR&4}
else smdZxFl
data[cur]=temp[i2++]; tniDF>Rb
} @[#$J0qq
} #O$
CPVjmRUF|
} ( {1e%
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改进后的归并排序: )+6v
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package org.rut.util.algorithm.support; >H(i^z/c
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import org.rut.util.algorithm.SortUtil; +Vo}F
OkCQ?]
/** c9kzOQ2n
* @author treeroot >N;F8v
* @since 2006-2-2 U~} U\_
* @version 1.0 U\veOQ;mW
*/ yu6`66h)
public class ImprovedMergeSort implements SortUtil.Sort { k% sO 0
L7= Q<D<
private static final int THRESHOLD = 10; z >YFyu#LF
Di@GY!
/* !ALKSiSl
* (non-Javadoc) Nru7(ag1~
* #l4)HV
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *[r!
*/ Yly@ww9t|
public void sort(int[] data) { B!dU>0&Ct
int[] temp=new int[data.length]; pG34Qw
mergeSort(data,temp,0,data.length-1); rQOWLg!"
} s0*0 'f
Ti2Ls5H}
private void mergeSort(int[] data, int[] temp, int l, int r) { oT{@_U{*J
int i, j, k; DNR~_3Aq
int mid = (l + r) / 2; kdxz!
if (l == r) "+z?x~rk
return; K]qM~v<A
if ((mid - l) >= THRESHOLD) R64!>o"nED
mergeSort(data, temp, l, mid); T;diNfgg
else s-Aw<Q)d
insertSort(data, l, mid - l + 1); :LWn<,4F&
if ((r - mid) > THRESHOLD) RbGJ)K!
mergeSort(data, temp, mid + 1, r); 9prU+9
else zVi15P$
insertSort(data, mid + 1, r - mid); ]l@ qra
q;fKcblKj
for (i = l; i <= mid; i++) { l"{Sm6:;-
temp = data; 0x11 vr!
} '=E3[0W
for (j = 1; j <= r - mid; j++) { uk9g<<3T
temp[r - j + 1] = data[j + mid]; Zes+/.sA}]
} Wxkx,q?
int a = temp[l]; &f>eQS=(
int b = temp[r]; l{:a1^[>y
for (i = l, j = r, k = l; k <= r; k++) { 8K;Y2 #
if (a < b) { GyW.2
data[k] = temp[i++]; =?])['VaA
a = temp; "c(Sysl.L
} else { 0l=+$&D
data[k] = temp[j--]; P_gYz!
b = temp[j]; zf.-I
} B-*E:O0y
} 6cdMS[_SD(
} ?sBh=Ds
B/J>9||g
/** tp:\j@dB
* @param data Um)>2|rp}
* @param l `e]6#iJ^
* @param i 7l."b$U4yv
*/ !ph" mf$-
private void insertSort(int[] data, int start, int len) { li] 6Pj,
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); :s-o0$PlJ
} ERdL^T>
} '.Ym!r~wL
} p0{EQT`tMG
} ?( =p<TUw
)9B:wc"
堆排序： G~wFnl%
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package org.rut.util.algorithm.support; 8ZcU[8r
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import org.rut.util.algorithm.SortUtil; <&pKc6+{
&[a Tw{2
/** D-IR!js ]
* @author treeroot Sd))vS^g
* @since 2006-2-2 w?mEuXc
* @version 1.0 K'1~^)*
*/ F_ 7H!F
public class HeapSort implements SortUtil.Sort{ S'U@X
zSv^<`X3
/* (non-Javadoc) tfkr+ /
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) a$9A(Pte
*/ 3Z>YV]YbeU
public void sort(int[] data) { z *9FlV
MaxHeap h=new MaxHeap(); DjCx~@
h.init(data); .mL#6P!d3^
for(int i=0;i h.remove(); U@TjB
System.arraycopy(h.queue,1,data,0,data.length); -$<O\5cAQ
} ~|Z'l%<Os
s?3i)Ymr
private static class MaxHeap{ 4ZC!SgJo
64j|}wJ$
void init(int[] data){ hzY[ G:
this.queue=new int[data.length+1]; | A:@&|
for(int i=0;i queue[++size]=data; _7kM]">j
fixUp(size); 6<Hu8$G|
} PT9v*3Bq~
} R4e&^tI@*
8[bkHfI
private int size=0; DF1<JdO+
LS.r%:$mb
private int[] queue; K(T\9J.
'GJVWpvUU
public int get() { MR'o{?{e`
return queue[1]; T~gW3J
} VY+>=!
!asqr1/
public void remove() { 5IqQ|/m<6
SortUtil.swap(queue,1,size--); fT Y/4(
fixDown(1); !q4x~G0d
} W9J1=
file://fixdown -s__E
private void fixDown(int k) { >_X/[<
int j; X1A<$Am1
while ((j = k << 1) <= size) { Vf-5&S&9
if (j < size %26amp;%26amp; queue[j] j++; Omag)U)IPh
if (queue[k]>queue[j]) file://不用交换 fP%Fyg^k
break; (A/0@f1#
SortUtil.swap(queue,j,k); S<6k0b(,_3
k = j; S{p}ux[}=
} .dq "k
} N<JHjq
private void fixUp(int k) { TSo:7&|
while (k > 1) { (E($3t8
int j = k >> 1; :WXf.+IA
if (queue[j]>queue[k]) :#="%
break; L>Jd7;=
SortUtil.swap(queue,j,k); 6J%iZ
k = j; en9en=n|
} _$/ +D:K
} IS]{}Y\3H
gbOCR1PBg
} \gccQig1CJ
}fIqH4bp
} ;vO@m!h}U
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SortUtil： ARL
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package org.rut.util.algorithm; O|v (58A
CJNG) p
import org.rut.util.algorithm.support.BubbleSort; P#G.lft"O
import org.rut.util.algorithm.support.HeapSort; cfoYnM
import org.rut.util.algorithm.support.ImprovedMergeSort; Q!CO0w
import org.rut.util.algorithm.support.ImprovedQuickSort; Ly(P=M>"y
import org.rut.util.algorithm.support.InsertSort; @R:#"
import org.rut.util.algorithm.support.MergeSort; f\ "`7
import org.rut.util.algorithm.support.QuickSort; l+ T,2sd
import org.rut.util.algorithm.support.SelectionSort; 9Z!lmfnJ
import org.rut.util.algorithm.support.ShellSort; ^Gz{6@TY5
&v#`t~
/** :d'65KMi
* @author treeroot [}""@?
* @since 2006-2-2 ,5-Zb3\
* @version 1.0 ?ow'^X-
*/ PM~*|(fA
public class SortUtil { 4nX(:K}>
public final static int INSERT = 1; %"7WXOv&z
public final static int BUBBLE = 2; n@B{vyy
public final static int SELECTION = 3; qw:9zYG}qW
public final static int SHELL = 4; T_L6 t66I
public final static int QUICK = 5; L:U4N*
public final static int IMPROVED_QUICK = 6; ^o%_W0_r
public final static int MERGE = 7; e)pTC97^L
public final static int IMPROVED_MERGE = 8; Hc!!tbBQ
public final static int HEAP = 9; V;*pL1
3@X7YgILU
public static void sort(int[] data) { k\(4sY M
sort(data, IMPROVED_QUICK); =g0*MZ;"
} Oje|bxQ
private static String[] name={ H2\1gNL
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" sX'U|)/pD
}; _Y YP4lEL
mrnxI#6
private static Sort[] impl=new Sort[]{ +Hy4s[_|
new InsertSort(), xw%)rm<t
new BubbleSort(), g.*&BXZi
new SelectionSort(), {a4xF2
new ShellSort(), Pe,;MP\2
new QuickSort(), #1l7FT?q
new ImprovedQuickSort(), 5LMj!)3
new MergeSort(), a"qR J-@
new ImprovedMergeSort(), /Nqrvy=
new HeapSort() OLFt;h
}; ??TdrTS
</w7W3F
public static String toString(int algorithm){ y''0PSfb#
return name[algorithm-1]; Fg@ ACv'@
} 3Wj,}
~x+Ykq0
public static void sort(int[] data, int algorithm) { ib Ue*Z["1
impl[algorithm-1].sort(data); F^TAd
} D%GGu"@GO
~j}J<4&OvC
public static interface Sort { ]S]"`;Wh
public void sort(int[] data); q6)p*}-
} b3^R,6]x&
(6#M9XL
public static void swap(int[] data, int i, int j) { -,@bA @&
int temp = data; =|#w.(3y
data = data[j]; -y<x!61
data[j] = temp; rIp'vy S\p
} gN\*Y
} s;>VeD)*)