[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; e_CgZ
} >c8EgSZJ
int i1=l; jQ?6I1o
int i2=mid+1; c5tCw3$t
for(int cur=l;cur<=r;cur++){ 25`6V>\
if(i1==mid+1) 'd=B{7k@
data[cur]=temp[i2++]; t[^68]
else if(i2>r) IqmoWn3
data[cur]=temp[i1++]; FDO$(&
else if(temp[i1] data[cur]=temp[i1++]; |<1
else v`pIovn
data[cur]=temp[i2++]; @,v.Y6Ge
} o%=OBTh_
} WMd5Y`y
+}0/ %5 =1
} keWqL]
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改进后的归并排序: '\.fG\xD
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package org.rut.util.algorithm.support; 'uw=)8t7
} ^67HtNQ
import org.rut.util.algorithm.SortUtil; P mgTTI
D^9r#&
/** F%pYnHr<
* @author treeroot bjEm=4FI;
* @since 2006-2-2 PF?tEw_WB
* @version 1.0 +\n8##oAI
*/ IH1 fvW e
public class ImprovedMergeSort implements SortUtil.Sort { X8(, ,>_
>|22%YVX
private static final int THRESHOLD = 10; VCZ.{MD
*^q%b/f
/* )a%kAUNj
* (non-Javadoc) |+Fko8-
* ..xg4V/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) h}o7/p
*/ jNa'l<dn]
public void sort(int[] data) { LD~/*
int[] temp=new int[data.length]; _Hn-bp[?>
mergeSort(data,temp,0,data.length-1); Z;bg;@r|
} +84JvOkWi
& A%*sD6
private void mergeSort(int[] data, int[] temp, int l, int r) { ')Drv)L
int i, j, k; Z;6v`;[
int mid = (l + r) / 2; -kVt_
if (l == r) &v\
return; 8e9ZgC|
if ((mid - l) >= THRESHOLD) 11s*C #
mergeSort(data, temp, l, mid); pPNU0]/
else IOx9".
insertSort(data, l, mid - l + 1); Rs0O4.yi;@
if ((r - mid) > THRESHOLD) INFbj8T
mergeSort(data, temp, mid + 1, r); K(+ ~#$|-~
else V9tG2mLf>
insertSort(data, mid + 1, r - mid); cZ{-h
YM*{^BXp
for (i = l; i <= mid; i++) { *TEgV
temp = data; U&uop$/Cq
} >:s#MwIwm
for (j = 1; j <= r - mid; j++) { yaiw|j`A
temp[r - j + 1] = data[j + mid]; +O 2H":$
} QN!$41A?{
int a = temp[l]; =N5~iMorD-
int b = temp[r]; IXaF(2>
for (i = l, j = r, k = l; k <= r; k++) { [J'O5"T
if (a < b) { &> Myf@
data[k] = temp[i++]; %. =B=*
a = temp; XN@F6Gj
} else { bnb:4?d]
data[k] = temp[j--]; Bw]Y71
b = temp[j]; OaeGukhX&
} qHT_,\l2
} 8{@0p"re@
} L1FTh
h/7m.p]
/** 2m]CmdV^
* @param data 8.S&J6
* @param l {s8v0~
* @param i %s}c#n)N
*/ TC7Rw}jF
private void insertSort(int[] data, int start, int len) { x]~{#pH@<
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); R/&Ev$:
} PyOj{WX>W
} B:-qUuS?R
} a^U)2{A*f
} Y7TW_[_u
vkFq/+'U
堆排序： {$,t^hd
u@V|13p<
package org.rut.util.algorithm.support; o5NV4=
CK<Wba
import org.rut.util.algorithm.SortUtil; u0&QStI
mBQA~@}
/** R^DZ@[\iV
* @author treeroot qD@]FEw!O
* @since 2006-2-2 N:"S/G>r ;
* @version 1.0 =l7@YCj5c
*/ q%g!TFMg
public class HeapSort implements SortUtil.Sort{ :Pa^/i
=;hz,+
/* (non-Javadoc) yK1@`3@?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]LcCom:]
*/ %25GplMT
public void sort(int[] data) { X+0+}S
MaxHeap h=new MaxHeap(); _6y#?8RMB
h.init(data); FTVV+9.l:
for(int i=0;i h.remove(); V7+fNr]I
System.arraycopy(h.queue,1,data,0,data.length); TBAF_$
} UDBMf2F]
}:04bIaV
private static class MaxHeap{ Y@jO#6R
|`N|S
void init(int[] data){ =tkO^
this.queue=new int[data.length+1]; aR- ?t14
for(int i=0;i queue[++size]=data; r |H 1Yy
fixUp(size); F gi&CJ8Q
} 9oe=*#Ig1m
} YadG05PDe
8@$`'h^6
private int size=0; dH5 Go9`~R
]AB<OjF1c|
private int[] queue; ^~ 95q0hq:
3PLYC}Jq
public int get() { W(gOidKKz
return queue[1]; 5$58z
} ]!um}8!}
jTeHI|b
public void remove() { j aU.hASj
SortUtil.swap(queue,1,size--); lG1\41ZxB
fixDown(1); o_i N(K
} l;~b:[r
file://fixdown vtA%^~0
private void fixDown(int k) { *eF'<._[U
int j; (9]8r2|.
while ((j = k << 1) <= size) { eBZ94rA]
if (j < size %26amp;%26amp; queue[j] j++; <n;9IU
if (queue[k]>queue[j]) file://不用交换 |ee A>z"I
break; &1 BACKu
SortUtil.swap(queue,j,k); b] 5i`
k = j; +u[^@>_I0
} d,5,OJY2f
} X_\$hF
private void fixUp(int k) { +jPJv[W
while (k > 1) { L2Vj2o"x?
int j = k >> 1; 2]UwIxzR
if (queue[j]>queue[k]) >d9b"T
break; _?I6[Mz
SortUtil.swap(queue,j,k); p=d,kY
k = j; zMg(\8
} H#+2l?D:"
} %(X^GL
B>kVJK`X
} u[<ij
Fy#7<Hp
} Xt%y>'.
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SortUtil： N?{.}-Q
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package org.rut.util.algorithm; wqasI@vyu
kZK1{
import org.rut.util.algorithm.support.BubbleSort; :5#iVa#<
import org.rut.util.algorithm.support.HeapSort; ?X'l&k>
import org.rut.util.algorithm.support.ImprovedMergeSort; <ht^Ck
import org.rut.util.algorithm.support.ImprovedQuickSort; -d]v6q'1
import org.rut.util.algorithm.support.InsertSort; 3n)\D<f]#
import org.rut.util.algorithm.support.MergeSort; 9zD,z+
import org.rut.util.algorithm.support.QuickSort; "+Kp8n6
import org.rut.util.algorithm.support.SelectionSort; 89YG `
import org.rut.util.algorithm.support.ShellSort; rNl%I@G
Srom@c
/** cR6Rb[9 N
* @author treeroot eAK=ylF;
* @since 2006-2-2 FwpTQix!
* @version 1.0 lhBu?q
*/ x4CSUcKb
public class SortUtil { p7p6~;P
public final static int INSERT = 1; Ewa/6=]LA
public final static int BUBBLE = 2; G7YBo4v
public final static int SELECTION = 3; /_V4gwb}|-
public final static int SHELL = 4; GDwijZw
public final static int QUICK = 5; d:g0XP
public final static int IMPROVED_QUICK = 6; l:14uWu|
public final static int MERGE = 7; tKCX0UZ'
public final static int IMPROVED_MERGE = 8; *@fVogr^
public final static int HEAP = 9; o(@^V!}V
_m#P\f'p
public static void sort(int[] data) { )P#xny2
sort(data, IMPROVED_QUICK); UW],9r/PD@
} $p\0/
private static String[] name={ ,F?O} ijk
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" . sv uXB
}; y:VY8a 4
t/c)[l hV
private static Sort[] impl=new Sort[]{ psAr>:\3
new InsertSort(), {KqERS& g
new BubbleSort(), <xwaFZ
new SelectionSort(), ;*>':-4
new ShellSort(), iz:O]kI
new QuickSort(), 8C5*:x9l
new ImprovedQuickSort(), N3&n"w _d
new MergeSort(), f"d4HZD^
new ImprovedMergeSort(), g*$yUt
new HeapSort() O/lu0acI
}; f=Kt[|%'e
FK,Jk04on
public static String toString(int algorithm){ vve[.Lud'
return name[algorithm-1]; pTE.,~-J^j
} [OwrIL
Z]k+dJ[-
public static void sort(int[] data, int algorithm) { Q_FL8w9D~8
impl[algorithm-1].sort(data); .!Q?TSQ+{!
} >5bd!b,
k^Uk=)9
public static interface Sort { 7=@MnF`
public void sort(int[] data); W4rh7e4
} q Qc-;|8
.ot[_*A.FD
public static void swap(int[] data, int i, int j) { 'Q4V(.
int temp = data; @EGUQ|WL^
data = data[j]; r]O8|#P,Z$
data[j] = temp; =d1R9O
} Y%YPR=j~ &
} R\>=}7