[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; rQ|^HNj
} kCkSu-
int i1=l; NvH9?Ek"
int i2=mid+1; |cpBoU
for(int cur=l;cur<=r;cur++){ qd*3| O^
if(i1==mid+1) cjzhuH/y
data[cur]=temp[i2++]; 7.fpGzUM
else if(i2>r) WPVur{?<
data[cur]=temp[i1++]; "KQ3EI/g
else if(temp[i1] data[cur]=temp[i1++]; dR"H,$UH
else 5b X*8H D
data[cur]=temp[i2++]; :TU;%@7
} dkTj KV
} jR-`ee}y2
sBP.P7u
} su]CaHU
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改进后的归并排序: UpL1C~&
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package org.rut.util.algorithm.support; ,4oYKJ$+h
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import org.rut.util.algorithm.SortUtil; 7%?2>t3~
7'wt/9
/** ~=hM y`Ml
* @author treeroot :.kc1_veYS
* @since 2006-2-2 (_G&S~@.
* @version 1.0 [+0rlmB
*/ oh+Q}Fa:
public class ImprovedMergeSort implements SortUtil.Sort { 32!jF}qpD
vK2sj1Hzr
private static final int THRESHOLD = 10; ~l$u~:4Ob
nR)/k,3W
/* [.\uHt
* (non-Javadoc) Df;EemCh
* IC&xL9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <p"[jC2zF;
*/ /]H6'
public void sort(int[] data) { i oX [g
int[] temp=new int[data.length]; 3nb&Z_/e
mergeSort(data,temp,0,data.length-1); &phers
} /BB(riG
f49pIcAq
private void mergeSort(int[] data, int[] temp, int l, int r) { +2%ih!
int i, j, k; ?E1<>4S8
int mid = (l + r) / 2; P" +!mSe^~
if (l == r) 61|uvTX
return; ~hi\*W6jg
if ((mid - l) >= THRESHOLD) S9~X#tpKe
mergeSort(data, temp, l, mid); C^ngdba\
else xWk:7,/
insertSort(data, l, mid - l + 1); %:I\M)t}k
if ((r - mid) > THRESHOLD) ,~^0AtLv
mergeSort(data, temp, mid + 1, r); eELJDSd BV
else OO?d[7Wt0
insertSort(data, mid + 1, r - mid); =O= 0 D
KT1/PWa
for (i = l; i <= mid; i++) { oej5bAi
temp = data; \lj.vzD-A
} r*#ApM"L
for (j = 1; j <= r - mid; j++) { .!uXhF'
temp[r - j + 1] = data[j + mid]; *_G(*yAe(
} O;RsYs9
int a = temp[l]; $OI 6^
int b = temp[r]; hdky:2^3
for (i = l, j = r, k = l; k <= r; k++) { nulCk33x'=
if (a < b) { t)|*-=
data[k] = temp[i++]; wQR>S>p
a = temp; yWI30hW
} else { !u@XEN>/
data[k] = temp[j--]; KU,KEtf
b = temp[j]; v{%x,K56
} I9S=VFhZ`
} USgZ%xk2
} ^0A}iJL
9Q{-4yF9k
/** yV=Ku
* @param data &L3OP@;
* @param l BJGL &N
* @param i 5,/rh,?
*/ 3m RP.<=
private void insertSort(int[] data, int start, int len) { Dep.Qfv{-
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 7.7aHt0
} ~>C@n'\lv
} hY$gzls4
} L?~>eT
} ;Du+C%
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堆排序： bI~ R6o
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package org.rut.util.algorithm.support; Cjh0 .{
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import org.rut.util.algorithm.SortUtil; '@4Myg* b
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/** q18IqY*Lo
* @author treeroot W?y7mw_S
* @since 2006-2-2 wOW#A}m'vj
* @version 1.0 ZL!,s#
*/ Ze `=n
public class HeapSort implements SortUtil.Sort{ bf1Tky=/
ODvlix
/* (non-Javadoc) GyU9,>|~T
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0,1x- yD
*/ sb8%!>C
public void sort(int[] data) { _v~c3y).
MaxHeap h=new MaxHeap(); ckn0I
h.init(data); m\9R;$\
for(int i=0;i h.remove(); yV{&x
System.arraycopy(h.queue,1,data,0,data.length); G]Rb{v,r
} 'i-6JG%
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private static class MaxHeap{ i.QS(gM
N=Q<mj;,
void init(int[] data){ 9f UD68Nob
this.queue=new int[data.length+1]; b&q!uFP
for(int i=0;i queue[++size]=data; UB%Zq1D|t
fixUp(size); }XmrfegF
} ;/ wl.'GA
} T@K= *p
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private int size=0; 12{F
Sq#AnD6To
private int[] queue; d|I_SI1
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public int get() { TA2HAMx)
return queue[1]; VO"/cG;]*
} O}#Ic$38
^?+qNbK
public void remove() { |3LD"!rEx
SortUtil.swap(queue,1,size--); 7rIz
fixDown(1); 7j,-o
} U-F\3a;&
file://fixdown y!z2+q2
private void fixDown(int k) { 5OHg% ^
int j; [{!K'V
while ((j = k << 1) <= size) { EY$Dtb+g8
if (j < size %26amp;%26amp; queue[j] j++; g`7C1&U*T
if (queue[k]>queue[j]) file://不用交换 ,W8EU
break; ?L K n
SortUtil.swap(queue,j,k); B#Q` !B4v
k = j; ar&j1""
} }-Ds%L
} _#\e5bE=Z
private void fixUp(int k) { fyt ODsb>
while (k > 1) { n>t&l8g%g
int j = k >> 1; ni2GZ<1j
if (queue[j]>queue[k]) m!22tpb
break; % w\
SortUtil.swap(queue,j,k); ]izrr
k = j; bEQy5AX
} %rFR:w`{
} x3>ZO.Q
>m$jJlAv8
} /Dd.C<F
W8blHw"
} bk(q8xR`
L/J1;
SortUtil： 5taR[ukM
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package org.rut.util.algorithm; MQc<AfW3/
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import org.rut.util.algorithm.support.BubbleSort; bA_/6r)u
import org.rut.util.algorithm.support.HeapSort; HbI'n,+
import org.rut.util.algorithm.support.ImprovedMergeSort; 7`s* {
import org.rut.util.algorithm.support.ImprovedQuickSort; f 7R/i
import org.rut.util.algorithm.support.InsertSort; ]iU8n (5f
import org.rut.util.algorithm.support.MergeSort; )])nd"E
import org.rut.util.algorithm.support.QuickSort; jo-2D[Q{
import org.rut.util.algorithm.support.SelectionSort; uI9eUO
import org.rut.util.algorithm.support.ShellSort; `e`}dgf0S|
D%`O.2T Y|
/** !1b}M/Wx
* @author treeroot Ir\P[A
* @since 2006-2-2 E,kDy:
* @version 1.0 Y9/`w@"v
*/ .B+Bl/
public class SortUtil { (jyT9'*wAT
public final static int INSERT = 1; zAW+!C.
public final static int BUBBLE = 2; H]P*!q`Ko
public final static int SELECTION = 3; elqm/u
public final static int SHELL = 4; E"O6N.}.
public final static int QUICK = 5; AZ9;6Df
public final static int IMPROVED_QUICK = 6; CL|d>
public final static int MERGE = 7; "[QQ(]={
public final static int IMPROVED_MERGE = 8; &%UZ"CcA
public final static int HEAP = 9; <~ Dq8If
a Xn:hn~O
public static void sort(int[] data) { .Ei#mG-=}&
sort(data, IMPROVED_QUICK); Iq0[Kd0.j
} bJ"}-s+Dx
private static String[] name={ :[:*kbWN-
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" kOE\.}~4
}; _v#Vf*#
<(!~s><.
private static Sort[] impl=new Sort[]{ \N%L-%^
new InsertSort(), :hBLi99 o
new BubbleSort(), aMJW__,
new SelectionSort(), ~W2Od2p!
new ShellSort(), sv.?C pE
new QuickSort(), ?NVX# t'
new ImprovedQuickSort(), [;C|WTYSL
new MergeSort(), Zv0'OX~8i
new ImprovedMergeSort(), O:]e4r,'
new HeapSort() | |u
}; %ws@t"aER
BvLC%
public static String toString(int algorithm){ ~eyZH8&
return name[algorithm-1]; ,/YTW@N
} ~eZ]LW])
Z,~PW#8<&
public static void sort(int[] data, int algorithm) { h+c9FN
impl[algorithm-1].sort(data); i*]$_\yl"
} dEI]|i r
hcqg94R#_
public static interface Sort { cCx_tGR"
public void sort(int[] data); }Ip1|Gj
} ]IclA6
vn+~P9SHQ
public static void swap(int[] data, int i, int j) { :caXQ)
int temp = data; ri2`M\;gt
data = data[j]; +gyGA/5:d$
data[j] = temp; wpI"kk_@@
} [w*]\x'S
} S^x?<kYQau