[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; u;c?d!E
} \)|hogI|f
int i1=l; !C:$?oU
int i2=mid+1; Z?QC!bWb
for(int cur=l;cur<=r;cur++){ +K4}Dmg
if(i1==mid+1) #;nYg?d=
data[cur]=temp[i2++]; [cp+i^f
else if(i2>r) J/*`7Pd
data[cur]=temp[i1++]; M/K5#8Arj
else if(temp[i1] data[cur]=temp[i1++]; JaGtsi9%.
else E?0%Z&1h
data[cur]=temp[i2++]; | %Vh`HT
} XOS[No~
} @MCg%Afw
g}',(tPMZ
} K(Bf2Mfq
tZG:Pr1U@
改进后的归并排序: z' >_Mc6
n6a`;0f[R
package org.rut.util.algorithm.support; HC,Se.VYS
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import org.rut.util.algorithm.SortUtil; pIX`MlBdF
?(i{y~
/** *!7O~yQ
* @author treeroot d-dEQKI?;
* @since 2006-2-2 mL: sJf
* @version 1.0 !Q0w\j h
*/ oM`0y@QCf
public class ImprovedMergeSort implements SortUtil.Sort { L/G6Fjg^
Z?m3~L9L2
private static final int THRESHOLD = 10; `+Q%oj#FF
]GQG~H^
/* 9;-p'C
* (non-Javadoc) %8~NqS|=
* a!AA]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) SI-Ops~e
*/ 'SF<_aS(
public void sort(int[] data) { ^ (zYzd
int[] temp=new int[data.length]; W9GVt$T7
mergeSort(data,temp,0,data.length-1); !d0kV,F:
} 7O-x<P;
.ctw2x5W
private void mergeSort(int[] data, int[] temp, int l, int r) { pg)WKbV
int i, j, k; *CI#+P
int mid = (l + r) / 2; 5]Y?m'
if (l == r) [K0(RDV)%
return; kL"2=7m;
if ((mid - l) >= THRESHOLD) YteO6A;
mergeSort(data, temp, l, mid); 4@# `t5H
else ._{H~R|
insertSort(data, l, mid - l + 1); %Y*Ndt4
if ((r - mid) > THRESHOLD) wcY?rE9
mergeSort(data, temp, mid + 1, r); ?2Py_gkf
else Qn)a/w-
insertSort(data, mid + 1, r - mid); bB3powy9
,wAF:7'
for (i = l; i <= mid; i++) { :^B1~p(?sK
temp = data; O[JL+g4
} ZX./P0
for (j = 1; j <= r - mid; j++) { %/#NK1&M
temp[r - j + 1] = data[j + mid]; {[?(9u7R
} 1NA.nw.
int a = temp[l]; ^sLdAC
int b = temp[r]; Cd}<a?m,
for (i = l, j = r, k = l; k <= r; k++) { 68WO~*
if (a < b) { \n|EM@=eE
data[k] = temp[i++]; lchPpm9
a = temp; sN01rtB(UT
} else { 6zuTQ^pz
data[k] = temp[j--]; ou{2@"
b = temp[j]; %^1V4
} [j/9neaye
} N~zdWnSZ@G
} LqoB 10Kc\
+,TRfP Fb
/** i&Tbz!
* @param data b8`)y<7
* @param l 1MP~dRZ$
* @param i VgG0VM
*/ * J7DY f
private void insertSort(int[] data, int start, int len) { H1pO!>M
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); fNli
} '8RsN-w
} *v jmy/3
} BOb">6C
} g|DF[
n/;WxnnQ
堆排序： uB]7G0g:
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package org.rut.util.algorithm.support; :t"^6xt
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import org.rut.util.algorithm.SortUtil; IXMop7~
6@h/*WElG
/** Gv!2f
* @author treeroot w=0(<s2
* @since 2006-2-2 iW]j9}t
* @version 1.0 iTBx\u%{
*/ ajbA\/\G;
public class HeapSort implements SortUtil.Sort{ ]}<}lI9
="1Ind@w!
/* (non-Javadoc) L:KF_W.I+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |B?m,U$A!
*/ Thp[+KP>
public void sort(int[] data) { . oF &Ff/[
MaxHeap h=new MaxHeap(); j78i#}e
h.init(data); f O}pj:
for(int i=0;i h.remove(); ''A_[J `>
System.arraycopy(h.queue,1,data,0,data.length); n$MO4s8)
} z\\[S@>pt
dc+>m,3$
private static class MaxHeap{ 2RVN\?s:
O W_{$9U
void init(int[] data){ BA@lk+aW
this.queue=new int[data.length+1]; du $:jN\}
for(int i=0;i queue[++size]=data; jnkR}wAA
fixUp(size); G)AqbY
} zq3\}9
} =J]&c?I
7cuE7"
private int size=0; /H[=5
A]_7}<<N
private int[] queue; \0^Kram>
8 `v-<J
public int get() { sf:,qD=z
return queue[1]; +C^nO=[E
} k%]3vRo<
=}<IfNA
public void remove() { f%A;`4`q
SortUtil.swap(queue,1,size--); :tc@2/>!O
fixDown(1); [7:,?$tC
} juP7P[d$qW
file://fixdown *[Imn\hu
private void fixDown(int k) { WqR&&gz
int j; ^Y?k0z
while ((j = k << 1) <= size) { F;Spi
if (j < size %26amp;%26amp; queue[j] j++; ^L,K& Jd
if (queue[k]>queue[j]) file://不用交换 +i6GHBn~J
break; v1#otrf
SortUtil.swap(queue,j,k); V%t.l
k = j; zF@/K`
} xf'V{9*
} ;_XFo&@
private void fixUp(int k) { 8:q1~`?5"b
while (k > 1) { b35fs]}u-6
int j = k >> 1; 3RUy,s
if (queue[j]>queue[k]) xW+6qtG`
break; kx8G
SortUtil.swap(queue,j,k); qRu~$K
k = j; 2zX]\s?3
} Mg+2. 8%
} \wmN
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} ,S\CC{!
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} U%-A?5
Oz.HH
SortUtil： g/4[N{Xf
y-Fo=y
package org.rut.util.algorithm; >:SHV W
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import org.rut.util.algorithm.support.BubbleSort; }ZYd4h|g\z
import org.rut.util.algorithm.support.HeapSort; ]43/`FX
import org.rut.util.algorithm.support.ImprovedMergeSort; fT|.@%"vc
import org.rut.util.algorithm.support.ImprovedQuickSort; 2'l'8
import org.rut.util.algorithm.support.InsertSort; cF*TotU_m
import org.rut.util.algorithm.support.MergeSort; v{RZJ^1
import org.rut.util.algorithm.support.QuickSort; -au^;CM
import org.rut.util.algorithm.support.SelectionSort; VCYwzB
import org.rut.util.algorithm.support.ShellSort; WH%g(6w1j
j\yjc/m
/** '(6z. toQ
* @author treeroot P-[-pi@
* @since 2006-2-2 3F"lXguS
* @version 1.0 3l]lwV
*/ RIR\']WN
public class SortUtil { H.P_]3f
public final static int INSERT = 1; 7jrt7[{
public final static int BUBBLE = 2; P.se'z)E
public final static int SELECTION = 3; S E<FL/x1#
public final static int SHELL = 4; 2F;y;l%
public final static int QUICK = 5; y G~?MEh{
public final static int IMPROVED_QUICK = 6; Mc lkEfn
public final static int MERGE = 7; Ha#=(9.
public final static int IMPROVED_MERGE = 8; {L971W_L
public final static int HEAP = 9; +bxYGD
=>S]q71
public static void sort(int[] data) { D_2:k'4
sort(data, IMPROVED_QUICK); +.8 \p5
} j a[Et/r
private static String[] name={ u~N?NW Q
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Yu/ID!`Z
}; ^S<Y>Nm]
5&g@3j]
private static Sort[] impl=new Sort[]{ \<h0Q,e
new InsertSort(), &A/]pi-\
new BubbleSort(), >~rTqtKd
new SelectionSort(), C.:<-xo
new ShellSort(), x^qVw5{n
new QuickSort(), _%Bi: HG0
new ImprovedQuickSort(), 9)yJ: N#F
new MergeSort(), 1#g2A0U,
new ImprovedMergeSort(), ;LfXi 8)
new HeapSort() }v;V=%N+v
}; h f)?1z4
? V1*cVD6i
public static String toString(int algorithm){ ;a!S!%.h
return name[algorithm-1]; T"Y+m-<%
} 234p9A@
@u+]aI!`-
public static void sort(int[] data, int algorithm) { Z#jZRNU%ox
impl[algorithm-1].sort(data); &AMl:@p9
} lBE=(A`
w(Ovr`o?9t
public static interface Sort { EP&,MYI%E
public void sort(int[] data); 5pG}Yk_(x
} Y Uc+0
&E F!OBR
public static void swap(int[] data, int i, int j) { bP#:Oi0v`
int temp = data; uc{Ihw
data = data[j]; g/_5unI}u
data[j] = temp; !TH) +zi
} Kn{4;Xk\
} 3NqB <J