[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; [?XP[h gd
} iRV=I,
int i1=l; ZJ/K MW
int i2=mid+1; yEkwdx5!(
for(int cur=l;cur<=r;cur++){ @R`Ao9n9V
if(i1==mid+1) /U0,%
data[cur]=temp[i2++]; Q0g^%
else if(i2>r) E0u&hBd3_
data[cur]=temp[i1++]; 1`~.!yd8(
else if(temp[i1] data[cur]=temp[i1++]; on1B~?*D
else &WS'Me
data[cur]=temp[i2++]; D&DbxTi
} | 1a}p
} Kv ajk~
,=: -&~?
} *0_Q0SeE,o
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改进后的归并排序: ~CHVU3
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package org.rut.util.algorithm.support; ^3QJv{)Q
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import org.rut.util.algorithm.SortUtil; lx> ."rW
j?\z5i""f
/** ss`Sl$
* @author treeroot Sf2xI'
* @since 2006-2-2 bzECNi5^
* @version 1.0 }-T,cA_H|
*/ &7r a
public class ImprovedMergeSort implements SortUtil.Sort { @]Ac >&
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private static final int THRESHOLD = 10; bYr*rEcA
.X:,]of
/* g|tclBx
* (non-Javadoc) $KP&#;9
* dZ4c!3'F
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Z,V<&9a;
*/ d-z[=1m
public void sort(int[] data) { %8xKBL]J
int[] temp=new int[data.length]; Q(x/&]7=V
mergeSort(data,temp,0,data.length-1); x~](d8*=
} 8d&%H,
D2RvFlAXu
private void mergeSort(int[] data, int[] temp, int l, int r) { $weC '-n@
int i, j, k; M C y~~DL
int mid = (l + r) / 2; Of}C.N8
if (l == r) *&hbfsP:
return; ,;f5OUl?[
if ((mid - l) >= THRESHOLD) )4>7X)j>
mergeSort(data, temp, l, mid); (O&HCT|
else :#D~j]pP
insertSort(data, l, mid - l + 1); as@? Kv
if ((r - mid) > THRESHOLD) by\Sq}
mergeSort(data, temp, mid + 1, r); {BgJ=0g?
else 8\jsGN.$JZ
insertSort(data, mid + 1, r - mid); l hST%3Ld
;d FJqo82
for (i = l; i <= mid; i++) { /QQjb4S}
temp = data; ?#RhHD
} }'K-1:
for (j = 1; j <= r - mid; j++) { GInw7
temp[r - j + 1] = data[j + mid]; 5Vai0Qfcu:
} 8s %YudW
int a = temp[l]; nj1PR`AE
int b = temp[r]; %/qwqo`Q
for (i = l, j = r, k = l; k <= r; k++) { /U`p|M;
if (a < b) { E()%IC/R
data[k] = temp[i++]; }$ Kd-cj+
a = temp; U*,\UF
} else { '8(UiB5d
data[k] = temp[j--]; X#zp,7j?
b = temp[j]; y>)c?9X
} :6/$/`I0W
} HJP~ lg
} f.$*9Fkw
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/** F!p;]B
* @param data H!>>|6OPF
* @param l B#cN'1c
* @param i O%haaL\
*/ [B+:)i
private void insertSort(int[] data, int start, int len) { {'z$5<|
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ^AiQNL}
} &I%E8E
} \A)Pcc}7
} SpYmgL?wJ
} MSRk|0Mcr
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堆排序： z;ku*IV
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package org.rut.util.algorithm.support; )dh`aQ%N "
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import org.rut.util.algorithm.SortUtil; <0qhc$M
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/** 29m$S7[
* @author treeroot 7B\Q5fLQ
* @since 2006-2-2 %(W8WLz}
* @version 1.0 +S`cUn7
*/ M'F<1(
public class HeapSort implements SortUtil.Sort{ Y=g]\%-PB
/Ov1eQBNG
/* (non-Javadoc) zqBzataR:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &`m$Zzl;
*/ WW>m`RU`
public void sort(int[] data) { V!>j:"
MaxHeap h=new MaxHeap(); ]>Gi_20*.
h.init(data); S#r|?GYua
for(int i=0;i h.remove(); =LKM)d=1
System.arraycopy(h.queue,1,data,0,data.length); y)a)VvU":
} GN:|b2 "
FSAX,Y
private static class MaxHeap{ m l@%H
*'-t_F';
void init(int[] data){ Nu\<Xr8
this.queue=new int[data.length+1]; ByO?qft>u
for(int i=0;i queue[++size]=data; 9%"`9j~H>
fixUp(size); k7;i^$@c
} pnyu&@e
} 9+xO2n
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private int size=0; +8x_f0<
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private int[] queue; g_N^Y
BG= J8
public int get() { k_ywwkG9lU
return queue[1]; ';My"/ Z-
} ZoSyc--Bv
ZS;V?]\(
public void remove() { 4d}=g]P
SortUtil.swap(queue,1,size--); yT5OFD|T
fixDown(1); ?6{g7S%
} 9V[}#(f$
file://fixdown ]!@=2kG4
private void fixDown(int k) { iyd$_CJz
int j; LME&qKe5
while ((j = k << 1) <= size) { 1q3"qYH
if (j < size %26amp;%26amp; queue[j] j++; =QbOvIq
if (queue[k]>queue[j]) file://不用交换 f1+
break; rpDBKo
SortUtil.swap(queue,j,k); Lo#G. s|
k = j; gx',K1T
} i$Kx@,O8t
} bt_c$TN
private void fixUp(int k) { 19c_=$mV
while (k > 1) { #;W4$q
int j = k >> 1; v'b%m8
if (queue[j]>queue[k]) UcOP 0_/
break; l U4 I*
SortUtil.swap(queue,j,k); D7JrGaF{
k = j; _SOwiz
} oz)4YBf
} WZPj?ou`G
V,0$mBYa
} qsbV)c
D4|Ajeo;1
} ]+3M\ ib
PnInsf%;
SortUtil： !4=_l6kg~+
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package org.rut.util.algorithm; Rvx7}ZL!
*<y9.\zY<
import org.rut.util.algorithm.support.BubbleSort; j/=Tj'S?D
import org.rut.util.algorithm.support.HeapSort; /|P{t{^WM
import org.rut.util.algorithm.support.ImprovedMergeSort; k{{3nenAG
import org.rut.util.algorithm.support.ImprovedQuickSort; l9="ccM
import org.rut.util.algorithm.support.InsertSort; 6w;`A9G[YI
import org.rut.util.algorithm.support.MergeSort; @6tczU}ak
import org.rut.util.algorithm.support.QuickSort; gh\u@#$8
import org.rut.util.algorithm.support.SelectionSort; *jWh4F,
import org.rut.util.algorithm.support.ShellSort; s(5hFuyg
>yXhP6
/** <N$Hb2b
* @author treeroot a^@.C5
* @since 2006-2-2 d=%NFCIV
* @version 1.0 u/6if9B
*/ }F!Uu KR
public class SortUtil { OG?7( UJ
public final static int INSERT = 1; ,52 IR[I<T
public final static int BUBBLE = 2; l5Ko9CG
public final static int SELECTION = 3; Ao}<a1f
public final static int SHELL = 4; gN:F50
public final static int QUICK = 5; LO)!Fj4|
public final static int IMPROVED_QUICK = 6; [~ 2m*Q
public final static int MERGE = 7; D6Aa5&rO+
public final static int IMPROVED_MERGE = 8; -d#08\
public final static int HEAP = 9; La9}JvQoX
-V}xvSVg
public static void sort(int[] data) { BlU&=;#r5>
sort(data, IMPROVED_QUICK); YX-j|m|
} !Md6Lh%-w
private static String[] name={ ox&?`DO
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" (?R!y -
}; QY&c=bWAX"
-sKtT 9o
private static Sort[] impl=new Sort[]{ JN+7oh]u
new InsertSort(), >| ,`E
new BubbleSort(), [>54?4{|.
new SelectionSort(), `14@dk
new ShellSort(), IAwS39B
new QuickSort(), ' *a}*(0OA
new ImprovedQuickSort(), Z^%a 1>`
new MergeSort(), .#SgU<Wq
new ImprovedMergeSort(), DMG'8\5C
new HeapSort() jIe /X]
}; |6bvUFr
NWFh<
public static String toString(int algorithm){ b)KEB9w
return name[algorithm-1]; xcWR#z{z
} eg}g}a
>\<eR]12
public static void sort(int[] data, int algorithm) { iD|~$<9o
impl[algorithm-1].sort(data); Y=G`~2Pr=
} T[1iZ
HYGd :SeH
public static interface Sort { aHuMm&
public void sort(int[] data); qm><}N7f
} l9Ol|Cb&
EG`AkWy
public static void swap(int[] data, int i, int j) { b7\>=
int temp = data; bH/4f93Nb
data = data[j]; uBt ]4d*
data[j] = temp; u3O@ccJ;
} 83Rs1}*
} J+IItO4%